Merge branch 'master' into chat-message-notification-e2e-tests

2026-02-06 09:56:03 +00:00 · 2025-05-05 07:03:43 +02:00 · 2025-05-05 07:03:43 +02:00 · f7b5ae47d2
commit f7b5ae47d2
parent 8401e3eb6a 30080a44c2
309 changed files with 7678 additions and 4352 deletions
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@ -57,19 +57,10 @@ updates:
      applies-to: version-updates
      patterns:
        - "*apollo-server*"
-    babel:
-      applies-to: version-updates
-      patterns:
-        - "@babel*"
    metascraper:
      applies-to: version-updates
      patterns:
        - "metascraper*"
-    typescript:
-      applies-to: version-updates
-      patterns:
-        - "ts*"
-        - "*types?"

 # webapp
 - package-ecosystem: docker
--- a/.github/workflows/test-e2e.yml
+++ b/.github/workflows/test-e2e.yml
@ -3,8 +3,62 @@ name: ocelot.social end-to-end test CI
 on: push

 jobs:
-  docker_preparation:
-    name: Fullstack test preparation
+  prepare_neo4j_image:
+    name: Fullstack | prepare neo4j image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.1.7
+
+      - name: Build docker image
+        run: |
+          docker build --target community -t "ocelotsocialnetwork/neo4j-community:test" neo4j/
+          docker save "ocelotsocialnetwork/neo4j-community:test" > /tmp/neo4j.tar
+      
+      - name: Cache docker image
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
+        with:
+          path: /tmp/neo4j.tar
+          key: ${{ github.run_id }}-e2e-neo4j-cache
+
+  prepare_backend_image:
+    name: Fullstack | prepare backend image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.1.7
+
+      - name: Build docker image
+        run: |
+          docker build --target test -t "ocelotsocialnetwork/backend:test" backend/
+          docker save "ocelotsocialnetwork/backend:test" > /tmp/backend.tar
+      
+      - name: Cache docker image
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
+        with:
+          path: /tmp/backend.tar
+          key: ${{ github.run_id }}-e2e-backend-cache
+
+  prepare_webapp_image:
+    name: Fullstack | prepare webapp image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.1.7
+
+      - name: Build docker image
+        run: |
+          docker build --target test -t "ocelotsocialnetwork/webapp:test" webapp/
+          docker save "ocelotsocialnetwork/webapp:test" > /tmp/webapp.tar
+      
+      - name: Cache docker image        
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
+        with:
+          path: /tmp/webapp.tar
+          key: ${{ github.run_id }}-e2e-webapp-cache
+
+  prepare_cypress:
+    name: Fullstack | prepare cypress
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
@ -13,19 +67,8 @@ jobs:
      - name: Copy env files
        run: |
          cp webapp/.env.template webapp/.env
-          cp frontend/.env.dist frontend/.env
          cp backend/.env.test_e2e backend/.env

-      - name: Build docker images
-        run: |
-          mkdir /tmp/images
-          docker build --target community -t "ocelotsocialnetwork/neo4j-community:test" neo4j/
-          docker save "ocelotsocialnetwork/neo4j-community:test" > /tmp/images/neo4j.tar
-          docker build --target test -t "ocelotsocialnetwork/backend:test" backend/
-          docker save "ocelotsocialnetwork/backend:test" > /tmp/images/backend.tar
-          docker build --target test -t "ocelotsocialnetwork/webapp:test" webapp/
-          docker save "ocelotsocialnetwork/webapp:test" > /tmp/images/webapp.tar
-
      - name: Install cypress requirements
        run: |
          wget --no-verbose -O /opt/cucumber-json-formatter "https://github.com/cucumber/json-formatter/releases/download/v19.0.0/cucumber-json-formatter-linux-386"
@ -35,21 +78,20 @@ jobs:
          cd ..
          yarn install
      
-      - name: Cache docker images
-        id: cache
+      - name: Cache docker image
+        
        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
        with:
          path: |
            /opt/cucumber-json-formatter
            /home/runner/.cache/Cypress
            /home/runner/work/Ocelot-Social/Ocelot-Social
-            /tmp/images/
-          key: ${{ github.run_id }}-e2e-preparation-cache
+          key: ${{ github.run_id }}-e2e-cypress

  fullstack_tests:
-    name: Fullstack tests
+    name: Fullstack | tests
    if: success()
-    needs: docker_preparation
+    needs: [prepare_neo4j_image, prepare_backend_image, prepare_webapp_image, prepare_cypress]
    runs-on: ubuntu-latest
    env:
      jobs: 8
@ -58,26 +100,42 @@ jobs:
        # run copies of the current job in parallel
        job: [1, 2, 3, 4, 5, 6, 7, 8]
    steps:
-      - name: Restore cache
+      - name: Restore cypress cache
        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
-        id: cache
        with:
          path: |
            /opt/cucumber-json-formatter
            /home/runner/.cache/Cypress
            /home/runner/work/Ocelot-Social/Ocelot-Social
-            /tmp/images/
-          key: ${{ github.run_id }}-e2e-preparation-cache
-          fail-on-cache-miss: true
+          key: ${{ github.run_id }}-e2e-cypress
+          restore-keys: ${{ github.run_id }}-e2e-cypress

+      - name: Restore neo4j cache
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
+        with:
+          path: /tmp/neo4j.tar
+          key: ${{ github.run_id }}-e2e-neo4j-cache
+
+      - name: Restore backend cache
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
+        with:
+          path: /tmp/backend.tar
+          key: ${{ github.run_id }}-e2e-backend-cache
+
+      - name: Restore webapp cache
+        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
+        with:
+          path: /tmp/webapp.tar
+          key: ${{ github.run_id }}-e2e-webapp-cache
+          
      - name: Boot up test system | docker compose
        run: |
          chmod +x /opt/cucumber-json-formatter
          sudo ln -fs /opt/cucumber-json-formatter /usr/bin/cucumber-json-formatter
-          docker load < /tmp/images/neo4j.tar
-          docker load < /tmp/images/backend.tar
-          docker load < /tmp/images/webapp.tar
-          docker compose -f docker-compose.yml -f docker-compose.test.yml up --detach --no-deps webapp neo4j backend mailserver --build
+          docker load < /tmp/neo4j.tar
+          docker load < /tmp/backend.tar
+          docker load < /tmp/webapp.tar
+          docker compose -f docker-compose.yml -f docker-compose.test.yml up --build --detach --no-deps webapp neo4j backend mailserver
          sleep 90s

      - name: Full stack tests | run tests
@ -98,17 +156,24 @@ jobs:
          name: ocelot-e2e-test-report-pr${{ needs.docker_preparation.outputs.pr-number }}
          path: /home/runner/work/Ocelot-Social/Ocelot-Social/cypress/reports/cucumber_html_report

-  cleanup:
-    name: Cleanup
-    needs: [docker_preparation, fullstack_tests]
+  cleanup_cache:
+    name: Cleanup Cache
+    needs: fullstack_tests
    runs-on: ubuntu-latest
-    permissions: write-all
    continue-on-error: true
    steps:
-      - name: Delete cache
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.1.7
+      
+      - name: Full stack tests | cleanup cache
        run: |
-          gh extension install actions/gh-actions-cache
-          KEY="${{ github.run_id }}-e2e-preparation-cache"
-          gh actions-cache delete $KEY -R Ocelot-Social-Community/Ocelot-Social --confirm
+          cacheKeys=$(gh cache list --json key --jq '.[] | select(.key | startswith("${{ github.run_id }}-e2e-")) | .key')
+          set +e
+          echo "Deleting caches..."
+          for cacheKey in $cacheKeys
+          do
+            gh cache delete "$cacheKey"
+          done
+          echo "Done"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
--- a/.github/workflows/test.lint_pr.yml
+++ b/.github/workflows/test.lint_pr.yml
@ -17,7 +17,7 @@ jobs:
    runs-on: ubuntu-latest
    if: ${{ github.actor != 'dependabot[bot]' }}
    steps:
-      - uses: amannn/action-semantic-pull-request@04501d43b574e4c1d23c629ffe4dcec27acfdeff # v5.5.3
+      - uses: amannn/action-semantic-pull-request@335288255954904a41ddda8947c8f2c844b8bfeb # v5.5.3
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
--- a/backend/.codecov.yml
+++ b/backend/.codecov.yml
@ -1,2 +0,0 @@
-coverage:
-  range: "60...100"
--- a/backend/.env.test_e2e
+++ b/backend/.env.test_e2e
@ -9,7 +9,7 @@ CLIENT_URI=http://localhost:3000
 # E-Mail default settings
 EMAIL_SUPPORT="devops@ocelot.social"
 EMAIL_DEFAULT_SENDER="devops@ocelot.social"
-SMTP_HOST=localhost
+SMTP_HOST=mailserver
 SMTP_PORT=1025
 SMTP_IGNORE_TLS=true
 SMTP_MAX_CONNECTIONS=5
--- a/backend/.eslintrc.cjs
+++ b/backend/.eslintrc.cjs
@ -133,7 +133,7 @@ module.exports = {
      'error',
      { allowModules: ['apollo-server-testing', 'rosie', '@faker-js/faker', 'ts-jest'] },
    ], // part of n/recommended
-    // 'n/no-unpublished-require': 'error', // part of n/recommended
+    'n/no-unpublished-require': ['error', { allowModules: ['ts-jest', 'require-json5'] }], // part of n/recommended
    // 'n/no-unsupported-features/es-builtins': 'error', // part of n/recommended
    // 'n/no-unsupported-features/es-syntax': 'error', // part of n/recommended
    // 'n/no-unsupported-features/node-builtins': 'error', // part of n/recommended
@ -204,7 +204,6 @@ module.exports = {
        tsconfigRootDir: __dirname,
        project: ['./tsconfig.json'],
        // this is to properly reference the referenced project database without requirement of compiling it
-        // eslint-disable-next-line camelcase
        EXPERIMENTAL_useSourceOfProjectReferenceRedirect: true,
      },
    },
--- a/backend/.graphqlconfig
+++ b/backend/.graphqlconfig
@ -1,3 +0,0 @@
-{
-  "schemaPath": "./src/schema.graphql"
-}
--- a/backend/.prettierrc.cjs
+++ b/backend/.prettierrc.cjs
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@ -1,4 +1,4 @@
-FROM node:20.12.1-alpine3.19 AS base
+FROM node:23.11.0-alpine AS base
 LABEL org.label-schema.name="ocelot.social:backend"
 LABEL org.label-schema.description="Backend of the Social Network Software ocelot.social"
 LABEL org.label-schema.usage="https://github.com/Ocelot-Social-Community/Ocelot-Social/blob/master/README.md"
@ -10,7 +10,7 @@ LABEL maintainer="devops@ocelot.social"
 ENV NODE_ENV="production"
 ENV PORT="4000"
 EXPOSE ${PORT}
-RUN apk --no-cache add git python3 make g++ bash
+RUN apk --no-cache add git python3 make g++ bash linux-headers
 RUN mkdir -p /app
 WORKDIR /app
 CMD ["/bin/bash", "-c", "yarn run start"]
--- a/backend/babel.config.json
+++ b/backend/babel.config.json
@ -1,15 +0,0 @@
-{
-  "presets": [
-    [
-      "@babel/preset-env",
-      {
-        "targets": {
-          "node": "10"
-        }
-      }
-    ]
-  ],
-  "plugins": [
-    "@babel/plugin-proposal-throw-expressions"
-  ]
-}
--- a/backend/jest.config.cjs
+++ b/backend/jest.config.cjs
@ -1,6 +1,7 @@
 /* eslint-disable import/no-commonjs */
-const { pathsToModuleNameMapper } = require('ts-jest')
 const requireJSON5 = require('require-json5')
+const { pathsToModuleNameMapper } = require('ts-jest')
+
 const { compilerOptions } = requireJSON5('./tsconfig.json')

 module.exports = {
--- a/backend/package.json
+++ b/backend/package.json
@ -10,9 +10,9 @@
  "scripts": {
    "start": "node build/src/",
    "build": "tsc && tsc-alias && ./scripts/build.copy.files.sh",
-    "dev": "nodemon --exec ts-node --require tsconfig-paths/register src/ -e js,ts,gql",
-    "dev:debug": "nodemon --exec babel-node --inspect=0.0.0.0:9229 src/ -e js,ts,gql",
-    "lint": "eslint --max-warnings=0 --report-unused-disable-directives --ext .js,.ts .",
+    "dev": "nodemon --exec ts-node --require tsconfig-paths/register src/index.ts -e js,ts,gql",
+    "dev:debug": "nodemon --exec node --inspect=0.0.0.0:9229 build/src/index.js -e js,ts,gql",
+    "lint": "eslint --max-warnings=0 --report-unused-disable-directives --ext .js,.ts,.cjs .",
    "test": "cross-env NODE_ENV=test NODE_OPTIONS=--max-old-space-size=8192 jest --runInBand --coverage --forceExit --detectOpenHandles",
    "db:reset": "ts-node --require tsconfig-paths/register src/db/reset.ts",
    "db:reset:withmigrations": "ts-node --require tsconfig-paths/register src/db/reset-with-migrations.ts",
@ -27,30 +27,16 @@
    "prod:db:data:branding": "node build/src/db/data-branding.js"
  },
  "dependencies": {
-    "@babel/cli": "~7.27.0",
-    "@babel/core": "^7.26.10",
-    "@babel/node": "~7.26.0",
-    "@babel/plugin-proposal-throw-expressions": "^7.25.9",
-    "@babel/preset-env": "~7.26.9",
-    "@babel/register": "^7.23.7",
    "@sentry/node": "^5.15.4",
-    "apollo-cache-inmemory": "~1.6.6",
-    "apollo-client": "~2.6.10",
-    "apollo-link-context": "~1.0.20",
-    "apollo-link-http": "~1.5.17",
    "apollo-server": "~2.14.2",
    "apollo-server-express": "^2.14.2",
    "aws-sdk": "^2.1692.0",
-    "babel-core": "~7.0.0-0",
-    "babel-eslint": "~10.1.0",
-    "babel-jest": "~29.7.0",
-    "babel-plugin-transform-runtime": "^6.23.0",
    "bcryptjs": "~3.0.2",
    "body-parser": "^1.20.3",
    "cheerio": "~1.0.0",
-    "cors": "~2.8.5",
    "cross-env": "~7.0.3",
    "dotenv": "~16.5.0",
+    "email-templates": "^12.0.2",
    "express": "^5.1.0",
    "graphql": "^14.6.0",
    "graphql-middleware": "~4.0.2",
@ -92,10 +78,11 @@
    "node-fetch": "^2.7.0",
    "nodemailer": "^6.10.1",
    "nodemailer-html-to-text": "^3.2.0",
+    "preview-email": "^3.1.0",
+    "pug": "^3.0.3",
    "request": "~2.88.2",
    "sanitize-html": "~2.16.0",
    "slug": "~9.1.0",
-    "subscriptions-transport-ws": "^0.9.19",
    "trunc-html": "~1.1.2",
    "uuid": "~9.0.1",
    "validator": "^13.15.0",
@ -104,9 +91,11 @@
  "devDependencies": {
    "@eslint-community/eslint-plugin-eslint-comments": "^4.5.0",
    "@faker-js/faker": "9.7.0",
+    "@types/email-templates": "^10.0.4",
    "@types/jest": "^29.5.14",
    "@types/lodash": "^4.17.16",
-    "@types/node": "^22.15.2",
+    "@types/node": "^22.15.3",
+    "@types/slug": "^5.0.9",
    "@types/uuid": "~9.0.1",
    "@typescript-eslint/eslint-plugin": "^5.62.0",
    "@typescript-eslint/parser": "^5.62.0",
@ -135,7 +124,10 @@
  },
  "resolutions": {
    "**/**/fs-capacitor": "^6.2.0",
-    "**/graphql-upload": "^11.0.0"
+    "**/graphql-upload": "^11.0.0",
+    "**/strip-ansi": "6.0.1",
+    "**/string-width": "4.2.0",
+    "**/wrap-ansi": "7.0.0"
  },
  "engines": {
    "node": ">=20.12.1"
--- a/backend/public/img/badges/default_verification.svg
+++ b/backend/public/img/badges/default_verification.svg
@ -15,7 +15,8 @@
    <path
       fill="#333"
       d="M384.5.297L512.325 221.9l-128 221.702-255.825.102L.675 222.1 128.675.4z"
-       id="path1" />
+       id="path1"
+       style="fill:#868383;fill-opacity:1" />
    <g
       fill="#ffffff"
       id="g2"
--- a/backend/public/img/badges/verification_red_admin.svg
+++ b/backend/public/img/badges/verification_red_admin.svg
@ -1 +1,45 @@
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+++ b/backend/public/img/badges/verification_red_moderator.svg
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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   width="512"
+   height="444"
+   version="1.1"
+   id="svg3"
+   xmlns="http://www.w3.org/2000/svg"
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+  <defs
+     id="defs3" />
+  <g
+     fill="none"
+     fill-rule="evenodd"
+     id="g3">
+    <path
+       fill="#AD245D"
+       d="M384 .297L511.392 221.65l-128 221.702-255.392.352L.608 222.35 128.608.65z"
+       id="path1"
+       style="fill:#e67919;fill-opacity:1" />
+    <path
+       d="m 85.310542,348.226 c -0.08,-21.169 -0.205,-53.162 21.256998,-71.332 3.817,-3.253 9.93,-7.497 17.321,-9.224 2.575,-0.523 4.956,-0.756 7.262,-0.979 4.438,-0.431 8.27,-0.804 12.054,-2.9 l 4.954,-2.846 c 9.87,-5.655 19.194,-10.996 28.226,-17.377 5.085,-3.632 6.726,-15.73 6.095,-25.428 -0.214,-2.792 -1.893,-5.7 -3.67,-8.777 -1.097,-1.901 -2.232,-3.867 -3.065,-5.916 l -0.073,-0.199 a 56.976,56.976 0 0 1 -0.422,-1.443 c -1.195,-4.205 -1.933,-6.378 -2.386,-7.476 -7.029,-0.944 -11.8,-8.647 -12.888,-21.006 l -0.031,-0.557 c -0.645,-12.785 0.808,-16.13 2.316,-17.716 0.24,-0.254 0.505,-0.475 0.783,-0.666 -1.754,-16.051 3.115,-32.521 13.358,-44.704 9.314,-11.079 21.955,-17.18 35.592,-17.18 3.73,0 7.55,0.458 11.355,1.362 25.63,6.228 41.679,30.27 40.062,59.227 0.53,0.251 1.018,0.61 1.44,1.066 2.752,2.964 2.47,10.97 2.22,14.276 l -0.024,0.41 c -0.335,5.236 -0.684,10.65 -3.052,15.73 -1.739,3.918 -4.405,6.242 -6.76,8.29 -2.396,2.089 -4.288,3.735 -5.294,6.885 -0.7,2.416 -1.645,4.866 -2.559,7.235 -1.752,4.538 -3.407,8.827 -3.54,13.244 -0.427,10.222 1.17,18.391 4.172,21.359 5.097,5.163 13.003,9.391 19.978,13.121 1.6,0.855 3.166,1.692 4.654,2.517 9.28,5.052 16.07,7.915 25.309,8.557 9.118,0.849 18.056,5.193 24.754,11.97 0.736,0.641 1.82,1.744 3.694,3.648 4.416,4.492 4.416,4.492 4.426,5.852 l 0.007,0.758 c 10.783,17.702 11.14,40.656 11.415,58.169 l 0.05,3.28 -3.278,0.028 c -42.05,0.363 -84.058,0.677 -126.058,0.993 -42.12,0.314 -84.232,0.632 -126.366998,0.994 l -3.273,0.029 z"
+       id="path2-5"
+       style="display:inline;fill:#ffffff" />
+    <path
+       d="m 349.88573,158.65792 h 15.318 v 86.734 h -15.318 v 0.513 l -22.127,-17.64 v 0.12 h -10.21 v 25.51 h -22.128 v -25.51 h -20.424 v -52.722 h 52.762 v -0.508 l 22.127,-17.065 z m 34.313,72.093 -7.988,-4.591 c 15.803,-27.453 1.717,-46.642 1.106,-47.443 l 7.304,-5.607 c 0.774,0.993 18.547,24.675 -0.422,57.641 z m 27.361,21.216 -13.866,-7.975 c 27.437,-47.66 2.98,-80.973 1.918,-82.36 l 12.682,-9.737 c 1.343,1.723 32.2,42.839 -0.734,100.072 z"
+       id="path2-1"
+       style="display:inline;fill:#ffffff" />
+  </g>
+</svg>
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@ -25,6 +25,7 @@ const environment = {
  DISABLED_MIDDLEWARES: ['test', 'development'].includes(env.NODE_ENV as string)
    ? (env.DISABLED_MIDDLEWARES?.split(',') ?? [])
    : [],
+  SEND_MAIL: env.NODE_ENV !== 'test',
 }

 const required = {
--- a/backend/src/constants/subscriptions.ts
+++ b/backend/src/constants/subscriptions.ts
@ -0,0 +1,3 @@
+export const NOTIFICATION_ADDED = 'NOTIFICATION_ADDED'
+export const CHAT_MESSAGE_ADDED = 'CHAT_MESSAGE_ADDED'
+export const ROOM_COUNT_UPDATED = 'ROOM_COUNT_UPDATED'
--- a/backend/src/context/database.ts
+++ b/backend/src/context/database.ts
@ -0,0 +1,49 @@
+import { getDriver, getNeode } from '@db/neo4j'
+
+import type { Driver } from 'neo4j-driver'
+
+export const query =
+  (driver: Driver) =>
+  async ({ query, variables = {} }: { driver; query: string; variables: object }) => {
+    const session = driver.session()
+
+    const result = session.readTransaction(async (transaction) => {
+      const response = await transaction.run(query, variables)
+      return response
+    })
+
+    try {
+      return await result
+    } finally {
+      await session.close()
+    }
+  }
+
+export const mutate =
+  (driver: Driver) =>
+  async ({ query, variables = {} }: { driver; query: string; variables: object }) => {
+    const session = driver.session()
+
+    const result = session.writeTransaction(async (transaction) => {
+      const response = await transaction.run(query, variables)
+      return response
+    })
+
+    try {
+      return await result
+    } finally {
+      await session.close()
+    }
+  }
+
+export default () => {
+  const driver = getDriver()
+  const neode = getNeode()
+
+  return {
+    driver,
+    neode,
+    query: query(driver),
+    mutate: mutate(driver),
+  }
+}
--- a/backend/src/context/pubsub.ts
+++ b/backend/src/context/pubsub.ts
@ -0,0 +1,25 @@
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+import { RedisPubSub } from 'graphql-redis-subscriptions'
+import { PubSub } from 'graphql-subscriptions'
+import Redis from 'ioredis'
+
+import CONFIG from '@config/index'
+
+export default () => {
+  if (!CONFIG.REDIS_DOMAIN || CONFIG.REDIS_PORT || CONFIG.REDIS_PASSWORD) {
+    return new PubSub()
+  }
+
+  const options = {
+    host: CONFIG.REDIS_DOMAIN,
+    port: CONFIG.REDIS_PORT,
+    password: CONFIG.REDIS_PASSWORD,
+    retryStrategy: (times) => {
+      return Math.min(times * 50, 2000)
+    },
+  }
+  return new RedisPubSub({
+    publisher: new Redis(options),
+    subscriber: new Redis(options),
+  })
+}
--- a/backend/src/db/factories.ts
+++ b/backend/src/db/factories.ts
@ -10,7 +10,7 @@ import { Factory } from 'rosie'
 import slugify from 'slug'
 import { v4 as uuid } from 'uuid'

-import generateInviteCode from '@schema/resolvers/helpers/generateInviteCode'
+import generateInviteCode from '@graphql/resolvers/helpers/generateInviteCode'

 import { getDriver, getNeode } from './neo4j'

--- a/backend/src/db/migrations-examples/20200123150105-merge_duplicate_user_accounts.ts
+++ b/backend/src/db/migrations-examples/20200123150105-merge_duplicate_user_accounts.ts
@ -10,7 +10,7 @@ import { throwError, concat } from 'rxjs'
 import { flatMap, mergeMap, map, catchError, filter } from 'rxjs/operators'

 import { getDriver } from '@db/neo4j'
-import normalizeEmail from '@schema/resolvers/helpers/normalizeEmail'
+import normalizeEmail from '@graphql/resolvers/helpers/normalizeEmail'

 export const description = `
  This migration merges duplicate :User and :EmailAddress nodes. It became
--- a/backend/src/db/models/Badge.ts
+++ b/backend/src/db/models/Badge.ts
--- a/backend/src/db/models/Category.ts
+++ b/backend/src/db/models/Category.ts
--- a/backend/src/db/models/Comment.ts
+++ b/backend/src/db/models/Comment.ts
--- a/backend/src/db/models/Donations.ts
+++ b/backend/src/db/models/Donations.ts
--- a/backend/src/db/models/EmailAddress.ts
+++ b/backend/src/db/models/EmailAddress.ts
--- a/backend/src/db/models/Group.ts
+++ b/backend/src/db/models/Group.ts
--- a/backend/src/db/models/Image.ts
+++ b/backend/src/db/models/Image.ts
--- a/backend/src/db/models/InviteCode.ts
+++ b/backend/src/db/models/InviteCode.ts
--- a/backend/src/db/models/Location.ts
+++ b/backend/src/db/models/Location.ts
--- a/backend/src/db/models/Migration.ts
+++ b/backend/src/db/models/Migration.ts
--- a/backend/src/db/models/Post.ts
+++ b/backend/src/db/models/Post.ts
--- a/backend/src/db/models/Report.ts
+++ b/backend/src/db/models/Report.ts
--- a/backend/src/db/models/SocialMedia.ts
+++ b/backend/src/db/models/SocialMedia.ts
--- a/backend/src/db/models/Tag.ts
+++ b/backend/src/db/models/Tag.ts
--- a/backend/src/db/models/UnverifiedEmailAddress.ts
+++ b/backend/src/db/models/UnverifiedEmailAddress.ts
--- a/backend/src/db/models/User.spec.ts
+++ b/backend/src/db/models/User.spec.ts
--- a/backend/src/db/models/User.ts
+++ b/backend/src/db/models/User.ts
--- a/backend/src/db/models/index.ts
+++ b/backend/src/db/models/index.ts
--- a/backend/src/db/neo4j.ts
+++ b/backend/src/db/neo4j.ts
@ -6,7 +6,7 @@ import neo4j, { Driver } from 'neo4j-driver'
 import Neode from 'neode'

 import CONFIG from '@config/index'
-import models from '@models/index'
+import models from '@db/models/index'

 let driver: Driver
 const defaultOptions = {
--- a/backend/src/db/seed.ts
+++ b/backend/src/db/seed.ts
@ -26,6 +26,8 @@ if (CONFIG.PRODUCTION && !CONFIG.PRODUCTION_DB_CLEAN_ALLOW) {
  throw new Error(`You cannot seed the database in a non-staging and real production environment!`)
 }

+CONFIG.SEND_MAIL = true
+
 const languages = ['de', 'en', 'es', 'fr', 'it', 'pt', 'pl']

 ;(async function () {
--- a/backend/src/db/seed/badges.ts
+++ b/backend/src/db/seed/badges.ts
@ -9,155 +9,155 @@ export const trophies = async () => {
    trophyBear: await Factory.build('badge', {
      id: 'trophy_bear',
      type: 'trophy',
-      description: 'You earned a Bear',
+      description: 'Has earned a Bear',
      icon: '/img/badges/trophy_blue_bear.svg',
    }),
    trophyPanda: await Factory.build('badge', {
      id: 'trophy_panda',
      type: 'trophy',
-      description: 'You earned a Panda',
+      description: 'Has earned a Panda',
      icon: '/img/badges/trophy_blue_panda.svg',
    }),
    trophyRabbit: await Factory.build('badge', {
      id: 'trophy_rabbit',
      type: 'trophy',
-      description: 'You earned a Rabbit',
+      description: 'Has earned a Rabbit',
      icon: '/img/badges/trophy_blue_rabbit.svg',
    }),
    trophyRacoon: await Factory.build('badge', {
      id: 'trophy_racoon',
      type: 'trophy',
-      description: 'You earned a Racoon',
+      description: 'Has earned a Racoon',
      icon: '/img/badges/trophy_blue_racoon.svg',
    }),
    trophyRhino: await Factory.build('badge', {
      id: 'trophy_rhino',
      type: 'trophy',
-      description: 'You earned a Rhino',
+      description: 'Has earned a Rhino',
      icon: '/img/badges/trophy_blue_rhino.svg',
    }),
    trophyTiger: await Factory.build('badge', {
      id: 'trophy_tiger',
      type: 'trophy',
-      description: 'You earned a Tiger',
+      description: 'Has earned a Tiger',
      icon: '/img/badges/trophy_blue_tiger.svg',
    }),
    trophyTurtle: await Factory.build('badge', {
      id: 'trophy_turtle',
      type: 'trophy',
-      description: 'You earned a Turtle',
+      description: 'Has earned a Turtle',
      icon: '/img/badges/trophy_blue_turtle.svg',
    }),
    trophyWhale: await Factory.build('badge', {
      id: 'trophy_whale',
      type: 'trophy',
-      description: 'You earned a Whale',
+      description: 'Has earned a Whale',
      icon: '/img/badges/trophy_blue_whale.svg',
    }),
    trophyWolf: await Factory.build('badge', {
      id: 'trophy_wolf',
      type: 'trophy',
-      description: 'You earned a Wolf',
+      description: 'Has earned a Wolf',
      icon: '/img/badges/trophy_blue_wolf.svg',
    }),
    // Green Transports
    trophyAirship: await Factory.build('badge', {
      id: 'trophy_airship',
      type: 'trophy',
-      description: 'You earned an Airship',
+      description: 'Has earned an Airship',
      icon: '/img/badges/trophy_green_airship.svg',
    }),
    trophyAlienship: await Factory.build('badge', {
      id: 'trophy_alienship',
      type: 'trophy',
-      description: 'You earned an Alienship',
+      description: 'Has earned an Alienship',
      icon: '/img/badges/trophy_green_alienship.svg',
    }),
    trophyBalloon: await Factory.build('badge', {
      id: 'trophy_balloon',
      type: 'trophy',
-      description: 'You earned a Balloon',
+      description: 'Has earned a Balloon',
      icon: '/img/badges/trophy_green_balloon.svg',
    }),
    trophyBigballoon: await Factory.build('badge', {
      id: 'trophy_bigballoon',
      type: 'trophy',
-      description: 'You earned a Big Balloon',
+      description: 'Has earned a Big Balloon',
      icon: '/img/badges/trophy_green_bigballoon.svg',
    }),
    trophyCrane: await Factory.build('badge', {
      id: 'trophy_crane',
      type: 'trophy',
-      description: 'You earned a Crane',
+      description: 'Has earned a Crane',
      icon: '/img/badges/trophy_green_crane.svg',
    }),
    trophyGlider: await Factory.build('badge', {
      id: 'trophy_glider',
      type: 'trophy',
-      description: 'You earned a Glider',
+      description: 'Has earned a Glider',
      icon: '/img/badges/trophy_green_glider.svg',
    }),
    trophyHelicopter: await Factory.build('badge', {
      id: 'trophy_helicopter',
      type: 'trophy',
-      description: 'You earned a Helicopter',
+      description: 'Has earned a Helicopter',
      icon: '/img/badges/trophy_green_helicopter.svg',
    }),
    // Green Animals
    trophyBee: await Factory.build('badge', {
      id: 'trophy_bee',
      type: 'trophy',
-      description: 'You earned a Bee',
+      description: 'Has earned a Bee',
      icon: '/img/badges/trophy_green_bee.svg',
    }),
    trophyButterfly: await Factory.build('badge', {
      id: 'trophy_butterfly',
      type: 'trophy',
-      description: 'You earned a Butterfly',
+      description: 'Has earned a Butterfly',
      icon: '/img/badges/trophy_green_butterfly.svg',
    }),
    // Green Plants
    trophyFlower: await Factory.build('badge', {
      id: 'trophy_flower',
      type: 'trophy',
-      description: 'You earned a Flower',
+      description: 'Has earned a Flower',
      icon: '/img/badges/trophy_green_flower.svg',
    }),
    trophyLifetree: await Factory.build('badge', {
      id: 'trophy_lifetree',
      type: 'trophy',
-      description: 'You earned the tree of life',
+      description: 'Has earned the tree of life',
      icon: '/img/badges/trophy_green_lifetree.svg',
    }),
    // Green Misc
    trophyDoublerainbow: await Factory.build('badge', {
      id: 'trophy_doublerainbow',
      type: 'trophy',
-      description: 'You earned the Double Rainbow',
+      description: 'Has earned the Double Rainbow',
      icon: '/img/badges/trophy_green_doublerainbow.svg',
    }),
    trophyEndrainbow: await Factory.build('badge', {
      id: 'trophy_endrainbow',
      type: 'trophy',
-      description: 'You earned the End of the Rainbow',
+      description: 'Has earned the End of the Rainbow',
      icon: '/img/badges/trophy_green_endrainbow.svg',
    }),
    trophyMagicrainbow: await Factory.build('badge', {
      id: 'trophy_magicrainbow',
      type: 'trophy',
-      description: 'You earned the Magic Rainbow',
+      description: 'Has earned the Magic Rainbow',
      icon: '/img/badges/trophy_green_magicrainbow.svg',
    }),
    trophyStarter: await Factory.build('badge', {
      id: 'trophy_starter',
      type: 'trophy',
-      description: 'You earned the Starter Badge',
+      description: 'Has earned the Starter Badge',
      icon: '/img/badges/trophy_green_starter.svg',
    }),
    trophySuperfounder: await Factory.build('badge', {
      id: 'trophy_superfounder',
      type: 'trophy',
-      description: 'You earned the Super Founder Badge',
+      description: 'Has earned the Super Founder Badge',
      icon: '/img/badges/trophy_green_superfounder.svg',
    }),
  }
@ -169,19 +169,19 @@ export const verification = async () => {
    verificationModerator: await Factory.build('badge', {
      id: 'verification_moderator',
      type: 'verification',
-      description: 'You are a Moderator',
+      description: 'Is a Moderator',
      icon: '/img/badges/verification_red_moderator.svg',
    }),
    verificationAdmin: await Factory.build('badge', {
      id: 'verification_admin',
      type: 'verification',
-      description: 'You are an Administrator',
+      description: 'Is an Administrator',
      icon: '/img/badges/verification_red_admin.svg',
    }),
    verificationDeveloper: await Factory.build('badge', {
      id: 'verification_developer',
      type: 'verification',
-      description: 'You are a Developer',
+      description: 'Is a Developer',
      icon: '/img/badges/verification_red_developer.svg',
    }),
  }
--- a/backend/src/db/types/User.ts
+++ b/backend/src/db/types/User.ts
@ -0,0 +1,32 @@
+import { Integer, Node } from 'neo4j-driver'
+
+export interface UserDbProperties {
+  allowEmbedIframes: boolean
+  awaySince?: string
+  createdAt: string
+  deleted: boolean
+  disabled: boolean
+  emailNotificationsChatMessage?: boolean
+  emailNotificationsCommentOnObservedPost?: boolean
+  emailNotificationsFollowingUsers?: boolean
+  emailNotificationsGroupMemberJoined?: boolean
+  emailNotificationsGroupMemberLeft?: boolean
+  emailNotificationsGroupMemberRemoved?: boolean
+  emailNotificationsGroupMemberRoleChanged?: boolean
+  emailNotificationsMention?: boolean
+  emailNotificationsPostInGroup?: boolean
+  encryptedPassword: string
+  id: string
+  lastActiveAt?: string
+  lastOnlineStatus?: string
+  locale: string
+  name: string
+  role: string
+  showShoutsPublicly: boolean
+  slug: string
+  termsAndConditionsAgreedAt: string
+  termsAndConditionsAgreedVersion: string
+  updatedAt: string
+}
+
+export type User = Node<Integer, UserDbProperties>
--- a/backend/src/emails/snapshots/sendChatMessageMail.spec.ts.snap
+++ b/backend/src/emails/snapshots/sendChatMessageMail.spec.ts.snap
@ -0,0 +1,247 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`sendChatMessageMail English chat_message template 1`] = `
+{
+  "attachments": [],
+  "from": "ocelot.social",
+  "html": "<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta content="multipart/html; charset=UTF-8" http-equiv="content-type">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <style>.wf-force-outline-none[tabindex="-1"]:focus{outline:none;}</style>
+    <style>body{
+  display: block;
+  font-family: Lato, sans-serif;
+  font-size: 17px;
+  text-align: left;
+  text-align: -webkit-left;
+  justify-content: center;
+  padding: 15px;
+  margin: 0px;
+}
+
+h2 {
+  margin-top: 25px;
+  font-size: 25px;
+  font-weight: normal;
+  line-height: 22px;
+  color: #333333;
+}
+
+.container {
+  max-width: 680px;
+  margin: 0 auto;
+  display: block;
+}
+
+.head-logo {
+  width: 60%;
+  height: auto;
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+a {
+  color: #17b53e;
+}
+
+a.button {
+  background: #17b53e;
+  font-family: Lato, sans-serif;
+  font-size: 16px;
+  line-height: 15px;
+  text-decoration: none;
+  text-align:center;
+  padding: 13px 17px;
+  color: #ffffff;
+  display: table;
+  margin-left: auto;
+  margin-right: auto;
+  border-radius: 4px;
+}
+
+.text-block {
+  margin-top: 20px;
+  color: #000000;
+}
+
+footer {
+  padding: 20px;
+  font-family: Lato, sans-serif;
+  font-size: 12px;
+  line-height: 15px;
+  text-align: center;
+  color: #888888;
+}
+
+    </style>
+  </head>
+  <body>
+    <div class="container">
+      <header>
+        <div class="head"><img class="head-logo" alt="Welcome Image" loading="lazy" src="http://webapp:3000/img/custom/logo-squared.svg">
+        </div>
+      </header>
+      <h2>Hello chatReceiver,</h2>
+      <div class="wrapper">
+        <div class="content"></div>
+        <p>you have received a new chat message from <a class="user" href="http://webapp:3000/user/chatSender/chatsender">chatSender</a>.
+        </p><a class="button" href="http://webapp:3000/chat">Show Chat</a>
+        <div class="text-block">
+          <p>See you soon on <a class="organization" href="https://ocelot.social">ocelot.social</a>!</p>
+          <p>– The ocelot.social Team</p><br>
+          <p>PS: If you don't want to receive e-mails anymore, change your <a class="settings" href="http://webapp:3000/settings/notifications">notification settings</a>!</p>
+        </div>
+      </div>
+      <footer>
+        <div class="footer"></div><a href="https://ocelot.social">ocelot.social Community</a>
+      </footer>
+    </div>
+  </body>
+</html>",
+  "subject": "ocelot.social  – Notification: New chat message",
+  "text": "HELLO CHATRECEIVER,
+
+you have received a new chat message from chatSender
+[http://webapp:3000/user/chatSender/chatsender].
+
+Show Chat [http://webapp:3000/chat]
+
+See you soon on ocelot.social [https://ocelot.social]!
+
+– The ocelot.social Team
+
+
+PS: If you don't want to receive e-mails anymore, change your notification
+settings [http://webapp:3000/settings/notifications]!
+
+
+ocelot.social Community [https://ocelot.social]",
+  "to": "user@example.org",
+}
+`;
+
+exports[`sendChatMessageMail German chat_message template 1`] = `
+{
+  "attachments": [],
+  "from": "ocelot.social",
+  "html": "<!DOCTYPE html>
+<html lang="de">
+  <head>
+    <meta content="multipart/html; charset=UTF-8" http-equiv="content-type">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <style>.wf-force-outline-none[tabindex="-1"]:focus{outline:none;}</style>
+    <style>body{
+  display: block;
+  font-family: Lato, sans-serif;
+  font-size: 17px;
+  text-align: left;
+  text-align: -webkit-left;
+  justify-content: center;
+  padding: 15px;
+  margin: 0px;
+}
+
+h2 {
+  margin-top: 25px;
+  font-size: 25px;
+  font-weight: normal;
+  line-height: 22px;
+  color: #333333;
+}
+
+.container {
+  max-width: 680px;
+  margin: 0 auto;
+  display: block;
+}
+
+.head-logo {
+  width: 60%;
+  height: auto;
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+a {
+  color: #17b53e;
+}
+
+a.button {
+  background: #17b53e;
+  font-family: Lato, sans-serif;
+  font-size: 16px;
+  line-height: 15px;
+  text-decoration: none;
+  text-align:center;
+  padding: 13px 17px;
+  color: #ffffff;
+  display: table;
+  margin-left: auto;
+  margin-right: auto;
+  border-radius: 4px;
+}
+
+.text-block {
+  margin-top: 20px;
+  color: #000000;
+}
+
+footer {
+  padding: 20px;
+  font-family: Lato, sans-serif;
+  font-size: 12px;
+  line-height: 15px;
+  text-align: center;
+  color: #888888;
+}
+
+    </style>
+  </head>
+  <body>
+    <div class="container">
+      <header>
+        <div class="head"><img class="head-logo" alt="Welcome Image" loading="lazy" src="http://webapp:3000/img/custom/logo-squared.svg">
+        </div>
+      </header>
+      <h2>Hallo chatReceiver,</h2>
+      <div class="wrapper">
+        <div class="content"></div>
+        <p>du hast eine neue Chat-Nachricht von <a class="user" href="http://webapp:3000/user/chatSender/chatsender">chatSender</a> erhalten.
+        </p><a class="button" href="http://webapp:3000/chat">Chat anzeigen</a>
+        <div class="text-block">
+          <p>Bis bald bei <a class="organization" href="https://ocelot.social">ocelot.social</a>!</p>
+          <p>– Dein ocelot.social Team</p><br>
+          <p>PS: Möchtest du keine E-Mails mehr erhalten, dann ändere deine <a class="settings" href="http://webapp:3000/settings/notifications">Benachrichtigungseinstellungen</a>!</p>
+        </div>
+      </div>
+      <footer>
+        <div class="footer"></div><a href="https://ocelot.social">ocelot.social Community</a>
+      </footer>
+    </div>
+  </body>
+</html>",
+  "subject": "ocelot.social  – Benachrichtigung: Neue Chat Nachricht",
+  "text": "HALLO CHATRECEIVER,
+
+du hast eine neue Chat-Nachricht von chatSender
+[http://webapp:3000/user/chatSender/chatsender] erhalten.
+
+Chat anzeigen [http://webapp:3000/chat]
+
+Bis bald bei ocelot.social [https://ocelot.social]!
+
+– Dein ocelot.social Team
+
+
+PS: Möchtest du keine E-Mails mehr erhalten, dann ändere deine
+Benachrichtigungseinstellungen [http://webapp:3000/settings/notifications]!
+
+
+ocelot.social Community [https://ocelot.social]",
+  "to": "user@example.org",
+}
+`;
--- a/backend/src/emails/snapshots/sendNotificationMail.spec.ts.snap
+++ b/backend/src/emails/snapshots/sendNotificationMail.spec.ts.snap
--- a/backend/src/emails/locales/de.json
+++ b/backend/src/emails/locales/de.json
@ -0,0 +1,39 @@
+{
+  "notification": "Benachrichtigung",
+  "subjects": {
+    "changedGroupMemberRole": "Rolle in Gruppe geändert",
+    "chatMessage": "Neue Chat Nachricht",
+    "commentedOnPost": "Neuer Kommentar zu Beitrag",
+    "followedUserPosted": "Neuer Beitrag von gefolgtem Nutzer",
+    "mentionedInComment": "Erwähnung in Kommentar",
+    "mentionedInPost": "Erwähnung in Beitrag",
+    "removedUserFromGroup": "Aus Gruppe entfernt",
+    "postInGroup": "Neuer Beitrag in Gruppe",
+    "userJoinedGroup": "Nutzer tritt Gruppe bei",
+    "userLeftGroup": "Nutzer verlässt Gruppe"
+  },
+  "buttons": {
+    "viewChat": "Chat anzeigen",
+    "viewComment": "Kommentar ansehen",
+    "viewGroup": "Gruppe ansehen",
+    "viewPost": "Beitrag ansehen"
+  },
+  "general": {
+    "greeting": "Hallo",
+    "seeYou": "Bis bald bei ",
+    "yourTeam": "– Dein {team} Team",
+    "settingsHint": "PS: Möchtest du keine E-Mails mehr erhalten, dann ändere deine ",
+    "settingsName": "Benachrichtigungseinstellungen"
+  },
+  "changedGroupMemberRole": "deine Rolle in der Gruppe „{groupName}“ wurde geändert. Klicke auf den Knopf, um diese Gruppe zu sehen:",
+  "chatMessageStart": "du hast eine neue Chat-Nachricht von ",
+  "chatMessageEnd": " erhalten.",
+  "commentedOnPost": " hat einen Beitrag den du beobachtest mit dem Titel „{postTitle}“ kommentiert. Klicke auf den Knopf, um diesen Kommentar zu sehen:",
+  "followedUserPosted": ", ein Nutzer dem du folgst, hat einen neuen Beitrag mit dem Titel „{postTitle}“ geschrieben. Klicke auf den Knopf, um diesen Beitrag zu sehen:",
+  "mentionedInComment": " hat dich in einem Kommentar zu dem Beitrag mit dem Titel „{postTitle}“ erwähnt. Klicke auf den Knopf, um den Kommentar zu sehen:",
+  "mentionedInPost": " hat Dich in einem Beitrag mit dem Titel „{postTitle}“ erwähnt. Klicke auf den Knopf, um den Beitrag zu sehen:",
+  "postInGroup": "jemand hat einen neuen Beitrag mit dem Titel „{postTitle}“ in einer deiner Gruppen geschrieben. Klicke auf den Knopf, um diesen Beitrag zu sehen:",
+  "removedUserFromGroup": "du wurdest aus der Gruppe „{groupName}“ entfernt.",
+  "userJoinedGroup": " ist der Gruppe „{groupName}“ beigetreten. Klicke auf den Knopf, um diese Gruppe zu sehen:",
+  "userLeftGroup": " hat die Gruppe „{groupName}“ verlassen. Klicke auf den Knopf, um diese Gruppe zu sehen:"
+}
--- a/backend/src/emails/locales/en.json
+++ b/backend/src/emails/locales/en.json
@ -0,0 +1,39 @@
+{
+  "notification": "Notification",
+  "subjects": {
+    "changedGroupMemberRole": "Role in group changed",
+    "chatMessage": "New chat message",
+    "commentedOnPost": "New comment on post",
+    "followedUserPosted": "New post by followd user",
+    "mentionedInComment": "Mentioned in comment",
+    "mentionedInPost": "Mentioned in post",
+    "removedUserFromGroup": "Removed from group",
+    "postInGroup": "New post in group",
+    "userJoinedGroup": "User joined group",
+    "userLeftGroup": "User left group"
+  },
+  "buttons": {
+    "viewChat": "Show Chat",
+    "viewComment": "View comment",
+    "viewGroup": "View group",
+    "viewPost": "View post"
+  },
+  "general": {
+    "greeting": "Hello",
+    "seeYou": "See you soon on ",
+    "yourTeam": "– The {team} Team",
+    "settingsHint": "PS: If you don't want to receive e-mails anymore, change your ",
+    "settingsName": "notification settings"
+  },
+  "changedGroupMemberRole": "your role in the group “{groupName}” has been changed. Click on the button to view this group:",
+  "chatMessageStart": "you have received a new chat message from ",
+  "chatMessageEnd": ".",
+  "commentedOnPost": " commented on a post that you are observing with the title “{postTitle}”. Click on the button to view this comment:",
+  "followedUserPosted": ", a user you are following, wrote a new post with the title “{postTitle}”. Click on the button to view this post:",
+  "mentionedInComment": " mentioned you in a comment to the post with the title “{postTitle}”. Click on the button to view this comment:",
+  "mentionedInPost": " mentioned you in a post with the title “{postTitle}”. Click on the button to view this post:",
+  "removedUserFromGroup": "you have been removed from the group “{groupName}”.",
+  "postInGroup": "someone wrote a new post with the title “{postTitle}” in one of your groups. Click on the button to view this post:",
+  "userJoinedGroup": " joined the group “{groupName}”. Click on the button to view this group:",
+  "userLeftGroup": " left the group “{groupName}”. Click on the button to view this group:"
+}
--- a/backend/src/emails/sendChatMessageMail.spec.ts
+++ b/backend/src/emails/sendChatMessageMail.spec.ts
@ -0,0 +1,87 @@
+import { sendChatMessageMail } from './sendEmail'
+
+const senderUser = {
+  allowEmbedIframes: false,
+  createdAt: '2025-04-30T00:16:49.610Z',
+  deleted: false,
+  disabled: false,
+  emailNotificationsChatMessage: true,
+  emailNotificationsCommentOnObservedPost: true,
+  emailNotificationsFollowingUsers: true,
+  emailNotificationsGroupMemberJoined: true,
+  emailNotificationsGroupMemberLeft: true,
+  emailNotificationsGroupMemberRemoved: true,
+  emailNotificationsGroupMemberRoleChanged: true,
+  emailNotificationsMention: true,
+  emailNotificationsPostInGroup: true,
+  encryptedPassword: '$2b$10$n.WujXapJrvn498lS97MD.gn8QwjWI9xlf8ckEYYtMTOPadMidcbG',
+  id: 'chatSender',
+  locale: 'en',
+  name: 'chatSender',
+  role: 'user',
+  showShoutsPublicly: false,
+  slug: 'chatsender',
+  termsAndConditionsAgreedAt: '2019-08-01T10:47:19.212Z',
+  termsAndConditionsAgreedVersion: '0.0.1',
+  updatedAt: '2025-04-30T00:16:49.610Z',
+}
+
+const recipientUser = {
+  allowEmbedIframes: false,
+  createdAt: '2025-04-30T00:16:49.716Z',
+  deleted: false,
+  disabled: false,
+  emailNotificationsChatMessage: true,
+  emailNotificationsCommentOnObservedPost: true,
+  emailNotificationsFollowingUsers: true,
+  emailNotificationsGroupMemberJoined: true,
+  emailNotificationsGroupMemberLeft: true,
+  emailNotificationsGroupMemberRemoved: true,
+  emailNotificationsGroupMemberRoleChanged: true,
+  emailNotificationsMention: true,
+  emailNotificationsPostInGroup: true,
+  encryptedPassword: '$2b$10$KOrCHvEB5CM7D.P3VcX2z.pSSBZKZhPqHW/QKym6V1S6fiG..xtBq',
+  id: 'chatReceiver',
+  locale: 'en',
+  name: 'chatReceiver',
+  role: 'user',
+  showShoutsPublicly: false,
+  slug: 'chatreceiver',
+  termsAndConditionsAgreedAt: '2019-08-01T10:47:19.212Z',
+  termsAndConditionsAgreedVersion: '0.0.1',
+  updatedAt: '2025-04-30T00:16:49.716Z',
+}
+
+describe('sendChatMessageMail', () => {
+  describe('English', () => {
+    beforeEach(() => {
+      recipientUser.locale = 'en'
+    })
+
+    it('chat_message template', async () => {
+      await expect(
+        sendChatMessageMail({
+          email: 'user@example.org',
+          senderUser,
+          recipientUser,
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+  })
+
+  describe('German', () => {
+    beforeEach(() => {
+      recipientUser.locale = 'de'
+    })
+
+    it('chat_message template', async () => {
+      await expect(
+        sendChatMessageMail({
+          email: 'user@example.org',
+          senderUser,
+          recipientUser,
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+  })
+})
--- a/backend/src/emails/sendEmail.ts
+++ b/backend/src/emails/sendEmail.ts
@ -0,0 +1,204 @@
+/* eslint-disable @typescript-eslint/no-unsafe-assignment */
+
+/* eslint-disable @typescript-eslint/no-unsafe-member-access */
+/* eslint-disable @typescript-eslint/no-unsafe-argument */
+/* eslint-disable @typescript-eslint/restrict-template-expressions */
+import path from 'node:path'
+
+import Email from 'email-templates'
+import { createTransport } from 'nodemailer'
+// import type Email as EmailType from '@types/email-templates'
+
+import CONFIG from '@config/index'
+import logosWebapp from '@config/logos'
+import metadata from '@config/metadata'
+import { UserDbProperties } from '@db/types/User'
+
+const hasAuthData = CONFIG.SMTP_USERNAME && CONFIG.SMTP_PASSWORD
+const hasDKIMData =
+  CONFIG.SMTP_DKIM_DOMAINNAME && CONFIG.SMTP_DKIM_KEYSELECTOR && CONFIG.SMTP_DKIM_PRIVATKEY
+
+const welcomeImageUrl = new URL(logosWebapp.LOGO_WELCOME_PATH, CONFIG.CLIENT_URI)
+const settingsUrl = new URL('/settings/notifications', CONFIG.CLIENT_URI)
+
+const defaultParams = {
+  welcomeImageUrl,
+  APPLICATION_NAME: CONFIG.APPLICATION_NAME,
+  ORGANIZATION_NAME: metadata.ORGANIZATION_NAME,
+  ORGANIZATION_URL: CONFIG.ORGANIZATION_URL,
+  supportUrl: CONFIG.SUPPORT_URL,
+  settingsUrl,
+}
+
+export const transport = createTransport({
+  host: CONFIG.SMTP_HOST,
+  port: CONFIG.SMTP_PORT,
+  ignoreTLS: CONFIG.SMTP_IGNORE_TLS,
+  secure: CONFIG.SMTP_SECURE, // true for 465, false for other ports
+  pool: true,
+  maxConnections: CONFIG.SMTP_MAX_CONNECTIONS,
+  maxMessages: CONFIG.SMTP_MAX_MESSAGES,
+  auth: hasAuthData && {
+    user: CONFIG.SMTP_USERNAME,
+    pass: CONFIG.SMTP_PASSWORD,
+  },
+  dkim: hasDKIMData && {
+    domainName: CONFIG.SMTP_DKIM_DOMAINNAME,
+    keySelector: CONFIG.SMTP_DKIM_KEYSELECTOR,
+    privateKey: CONFIG.SMTP_DKIM_PRIVATKEY,
+  },
+})
+
+const email = new Email({
+  message: {
+    from: `${CONFIG.APPLICATION_NAME}`,
+  },
+  transport,
+  i18n: {
+    locales: ['en', 'de'],
+    defaultLocale: 'en',
+    retryInDefaultLocale: false,
+    directory: path.join(__dirname, 'locales'),
+    updateFiles: false,
+    objectNotation: true,
+    mustacheConfig: {
+      tags: ['{', '}'],
+      disable: false,
+    },
+  },
+  send: CONFIG.SEND_MAIL,
+  preview: false,
+  // This is very useful to see the emails sent by the unit tests
+  /*
+  preview: {
+    open: {
+      app: 'brave-browser',
+    },
+  },
+  */
+})
+
+interface OriginalMessage {
+  to: string
+  from: string
+  attachments: string[]
+  subject: string
+  html: string
+  text: string
+}
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const sendNotificationMail = async (notification: any): Promise<OriginalMessage> => {
+  const locale = notification?.to?.locale
+  const to = notification?.email
+  const name = notification?.to?.name
+  const template = notification?.reason
+
+  try {
+    const { originalMessage } = await email.send({
+      template: path.join(__dirname, 'templates', template),
+      message: {
+        to,
+      },
+      locals: {
+        ...defaultParams,
+        locale,
+        name,
+        postTitle:
+          notification?.from?.__typename === 'Comment'
+            ? notification?.from?.post?.title
+            : notification?.from?.title,
+        postUrl: new URL(
+          notification?.from?.__typename === 'Comment'
+            ? `/post/${notification?.from?.post?.id}/${notification?.from?.post?.slug}`
+            : `/post/${notification?.from?.id}/${notification?.from?.slug}`,
+          CONFIG.CLIENT_URI,
+        ),
+        postAuthorName:
+          notification?.from?.__typename === 'Comment'
+            ? undefined
+            : notification?.from?.author?.name,
+        postAuthorUrl:
+          notification?.from?.__typename === 'Comment'
+            ? undefined
+            : new URL(
+                `user/${notification?.from?.author?.id}/${notification?.from?.author?.slug}`,
+                CONFIG.CLIENT_URI,
+              ),
+        commenterName:
+          notification?.from?.__typename === 'Comment'
+            ? notification?.from?.author?.name
+            : undefined,
+        commenterUrl:
+          notification?.from?.__typename === 'Comment'
+            ? new URL(
+                `/user/${notification?.from?.author?.id}/${notification?.from?.author?.slug}`,
+                CONFIG.CLIENT_URI,
+              )
+            : undefined,
+        commentUrl:
+          notification?.from?.__typename === 'Comment'
+            ? new URL(
+                `/post/${notification?.from?.post?.id}/${notification?.from?.post?.slug}#commentId-${notification?.from?.id}`,
+                CONFIG.CLIENT_URI,
+              )
+            : undefined,
+        // chattingUser: 'SR-71',
+        // chatUrl: new URL('/chat', CONFIG.CLIENT_URI),
+        groupUrl:
+          notification?.from?.__typename === 'Group'
+            ? new URL(
+                `/group/${notification?.from?.id}/${notification?.from?.slug}`,
+                CONFIG.CLIENT_URI,
+              )
+            : undefined,
+        groupName:
+          notification?.from?.__typename === 'Group' ? notification?.from?.name : undefined,
+        groupRelatedUserName:
+          notification?.from?.__typename === 'Group' ? notification?.relatedUser?.name : undefined,
+        groupRelatedUserUrl:
+          notification?.from?.__typename === 'Group'
+            ? new URL(
+                `/user/${notification?.relatedUser?.id}/${notification?.relatedUser?.slug}`,
+                CONFIG.CLIENT_URI,
+              )
+            : undefined,
+      },
+    })
+    return originalMessage as OriginalMessage
+  } catch (error) {
+    throw new Error(error)
+  }
+}
+
+export interface ChatMessageEmailInput {
+  senderUser: UserDbProperties
+  recipientUser: UserDbProperties
+  email: string
+}
+
+export const sendChatMessageMail = async (
+  data: ChatMessageEmailInput,
+): Promise<OriginalMessage> => {
+  const { senderUser, recipientUser } = data
+  const to = data.email
+  try {
+    const { originalMessage } = await email.send({
+      template: path.join(__dirname, 'templates', 'chat_message'),
+      message: {
+        to,
+      },
+      locals: {
+        ...defaultParams,
+        locale: recipientUser.locale,
+        name: recipientUser.name,
+        chattingUser: senderUser.name,
+        chattingUserUrl: new URL(`/user/${senderUser.id}/${senderUser.slug}`, CONFIG.CLIENT_URI),
+        chatUrl: new URL('/chat', CONFIG.CLIENT_URI),
+      },
+    })
+    return originalMessage as OriginalMessage
+  } catch (error) {
+    throw new Error(error)
+  }
+}
--- a/backend/src/emails/sendNotificationMail.spec.ts
+++ b/backend/src/emails/sendNotificationMail.spec.ts
@ -0,0 +1,475 @@
+import { sendNotificationMail } from './sendEmail'
+
+describe('sendNotificationMail', () => {
+  let locale = 'en'
+
+  describe('English', () => {
+    beforeEach(() => {
+      locale = 'en'
+    })
+
+    it('followed_user_posted template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'followed_user_posted',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            id: 'p1',
+            slug: 'new-post',
+            title: 'New Post',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('post_in_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'post_in_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            id: 'p1',
+            slug: 'new-post',
+            title: 'New Post',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('mentioned_in_post template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'mentioned_in_post',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            id: 'p1',
+            slug: 'new-post',
+            title: 'New Post',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('commented_on_post template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'commented_on_post',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Comment',
+            id: 'c1',
+            slug: 'new-comment',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+            post: {
+              id: 'p1',
+              slug: 'new-post',
+              title: 'New Post',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('mentioned_in_comment template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'mentioned_in_comment',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Comment',
+            id: 'c1',
+            slug: 'new-comment',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+            post: {
+              id: 'p1',
+              slug: 'new-post',
+              title: 'New Post',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('changed_group_member_role template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'changed_group_member_role',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('user_joined_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'user_joined_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+          relatedUser: {
+            id: 'u2',
+            name: 'Peter Lustig',
+            slug: 'peter-lustig',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('user_left_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'user_left_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+          relatedUser: {
+            id: 'u2',
+            name: 'Peter Lustig',
+            slug: 'peter-lustig',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('removed_user_from_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'removed_user_from_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+  })
+
+  describe('German', () => {
+    beforeEach(() => {
+      locale = 'de'
+    })
+
+    it('followed_user_posted template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'followed_user_posted',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            id: 'p1',
+            slug: 'new-post',
+            title: 'New Post',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('post_in_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'post_in_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            id: 'p1',
+            slug: 'new-post',
+            title: 'New Post',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('mentioned_in_post template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'mentioned_in_post',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            id: 'p1',
+            slug: 'new-post',
+            title: 'New Post',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('commented_on_post template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'commented_on_post',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Comment',
+            id: 'c1',
+            slug: 'new-comment',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+            post: {
+              id: 'p1',
+              slug: 'new-post',
+              title: 'New Post',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('mentioned_in_comment template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'mentioned_in_comment',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Comment',
+            id: 'c1',
+            slug: 'new-comment',
+            author: {
+              id: 'u2',
+              name: 'Peter Lustig',
+              slug: 'peter-lustig',
+            },
+            post: {
+              id: 'p1',
+              slug: 'new-post',
+              title: 'New Post',
+            },
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('changed_group_member_role template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'changed_group_member_role',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('user_joined_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'user_joined_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+          relatedUser: {
+            id: 'u2',
+            name: 'Peter Lustig',
+            slug: 'peter-lustig',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('user_left_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'user_left_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+          relatedUser: {
+            id: 'u2',
+            name: 'Peter Lustig',
+            slug: 'peter-lustig',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+
+    it('removed_user_from_group template', async () => {
+      await expect(
+        sendNotificationMail({
+          reason: 'removed_user_from_group',
+          email: 'user@example.org',
+          to: {
+            name: 'Jenny Rostock',
+            id: 'u1',
+            slug: 'jenny-rostock',
+            locale,
+          },
+          from: {
+            __typename: 'Group',
+            id: 'g1',
+            slug: 'the-group',
+            name: 'The Group',
+          },
+        }),
+      ).resolves.toMatchSnapshot()
+    })
+  })
+})
--- a/backend/src/emails/templates/changed_group_member_role/html.pug
+++ b/backend/src/emails/templates/changed_group_member_role/html.pug
@ -0,0 +1,7 @@
+extend ../layout.pug
+
+block content
+  .content
+  - var groupUrl = groupUrl
+  p= t('changedGroupMemberRole', { groupName })
+  a.button(href=groupUrl)= t('buttons.viewGroup')
--- a/backend/src/emails/templates/changed_group_member_role/subject.pug
+++ b/backend/src/emails/templates/changed_group_member_role/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.changedGroupMemberRole')}`
--- a/backend/src/emails/templates/chat_message/html.pug
+++ b/backend/src/emails/templates/chat_message/html.pug
@ -0,0 +1,8 @@
+extend ../layout.pug
+
+block content
+  .content
+  p= t('chatMessageStart')
+    a.user(href=chattingUserUrl)= chattingUser
+    = t('chatMessageEnd')
+  a.button(href=chatUrl)= t('buttons.viewChat')
--- a/backend/src/emails/templates/chat_message/subject.pug
+++ b/backend/src/emails/templates/chat_message/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.chatMessage')}`
--- a/backend/src/emails/templates/commented_on_post/html.pug
+++ b/backend/src/emails/templates/commented_on_post/html.pug
@ -0,0 +1,8 @@
+extend ../layout.pug
+
+block content
+  .content
+  p
+    a.user(href=commenterUrl)= commenterName
+    = t('commentedOnPost', { postTitle})
+  a.button(href=commentUrl)= t('buttons.viewComment')
--- a/backend/src/emails/templates/commented_on_post/subject.pug
+++ b/backend/src/emails/templates/commented_on_post/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.commentedOnPost')}`
--- a/backend/src/emails/templates/followed_user_posted/html.pug
+++ b/backend/src/emails/templates/followed_user_posted/html.pug
@ -0,0 +1,8 @@
+extend ../layout.pug
+
+block content
+  .content
+  p
+    a.user(href=postAuthorUrl)= postAuthorName
+    = t('followedUserPosted', { postTitle })
+  a.button(href=postUrl)= t('buttons.viewPost')
--- a/backend/src/emails/templates/followed_user_posted/subject.pug
+++ b/backend/src/emails/templates/followed_user_posted/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.followedUserPosted')}`
--- a/backend/src/emails/templates/includes/footer.pug
+++ b/backend/src/emails/templates/includes/footer.pug
@ -0,0 +1,5 @@
+footer
+  .footer
+  - var organizationUrl = ORGANIZATION_URL
+  - var organizationName = ORGANIZATION_NAME
+    a(href=organizationUrl)= organizationName
--- a/backend/src/emails/templates/includes/greeting.pug
+++ b/backend/src/emails/templates/includes/greeting.pug
@ -0,0 +1,14 @@
+//- This sets the greeting at the end of every e-mail
+.text-block
+  - var organizationUrl = ORGANIZATION_URL
+  - var team = APPLICATION_NAME
+  - var settingsUrl = settingsUrl
+  p= t('general.seeYou')
+    a.organization(href=organizationUrl)= team
+    | !
+  p= t('general.yourTeam', { team })
+  br
+  p= t('general.settingsHint')
+    a.settings(href=settingsUrl)= t('general.settingsName')
+    | !
+  
--- a/backend/src/emails/templates/includes/header.pug
+++ b/backend/src/emails/templates/includes/header.pug
@ -0,0 +1,9 @@
+header
+  .head
+    - var img = welcomeImageUrl
+    img.head-logo(
+      alt="Welcome Image"
+      loading="lazy"
+      src=img
+      )
+
--- a/backend/src/emails/templates/includes/salutation.pug
+++ b/backend/src/emails/templates/includes/salutation.pug
@ -0,0 +1 @@
+h2= `${t('general.greeting')} ${name},`
--- a/backend/src/emails/templates/includes/webflow.css
+++ b/backend/src/emails/templates/includes/webflow.css
@ -0,0 +1,65 @@
+body{
+  display: block;
+  font-family: Lato, sans-serif;
+  font-size: 17px;
+  text-align: left;
+  text-align: -webkit-left;
+  justify-content: center;
+  padding: 15px;
+  margin: 0px;
+}
+
+h2 {
+  margin-top: 25px;
+  font-size: 25px;
+  font-weight: normal;
+  line-height: 22px;
+  color: #333333;
+}
+
+.container {
+  max-width: 680px;
+  margin: 0 auto;
+  display: block;
+}
+
+.head-logo {
+  width: 60%;
+  height: auto;
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+a {
+  color: #17b53e;
+}
+
+a.button {
+  background: #17b53e;
+  font-family: Lato, sans-serif;
+  font-size: 16px;
+  line-height: 15px;
+  text-decoration: none;
+  text-align:center;
+  padding: 13px 17px;
+  color: #ffffff;
+  display: table;
+  margin-left: auto;
+  margin-right: auto;
+  border-radius: 4px;
+}
+
+.text-block {
+  margin-top: 20px;
+  color: #000000;
+}
+
+footer {
+  padding: 20px;
+  font-family: Lato, sans-serif;
+  font-size: 12px;
+  line-height: 15px;
+  text-align: center;
+  color: #888888;
+}
--- a/backend/src/emails/templates/layout.pug
+++ b/backend/src/emails/templates/layout.pug
@ -0,0 +1,26 @@
+doctype html
+html(lang=locale)
+  head
+    meta(
+      content="multipart/html; charset=UTF-8"
+      http-equiv="content-type"
+      )
+    meta(
+      name="viewport"
+      content="width=device-width, initial-scale=1"
+      )
+    style.
+      .wf-force-outline-none[tabindex="-1"]:focus{outline:none;}
+    style
+      include includes/webflow.css
+  
+  body
+    div.container
+      include includes/header.pug
+      include includes/salutation.pug
+
+      .wrapper
+        block content
+        include includes/greeting.pug
+
+      include includes/footer.pug
--- a/backend/src/emails/templates/mentioned_in_comment/html.pug
+++ b/backend/src/emails/templates/mentioned_in_comment/html.pug
@ -0,0 +1,8 @@
+extend ../layout.pug
+
+block content
+  .content
+  p
+    a.user(href=commenterUrl)= commenterName
+    = t('mentionedInComment', { postTitle})
+  a.button(href=commentUrl)= t('buttons.viewComment')
--- a/backend/src/emails/templates/mentioned_in_comment/subject.pug
+++ b/backend/src/emails/templates/mentioned_in_comment/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.mentionedInComment')}`
--- a/backend/src/emails/templates/mentioned_in_post/html.pug
+++ b/backend/src/emails/templates/mentioned_in_post/html.pug
@ -0,0 +1,8 @@
+extend ../layout.pug
+
+block content
+  .content
+  p
+    a.user(href=postAuthorUrl)= postAuthorName
+    = t('mentionedInPost', { postTitle })
+  a.button(href=postUrl)= t('buttons.viewPost')
--- a/backend/src/emails/templates/mentioned_in_post/subject.pug
+++ b/backend/src/emails/templates/mentioned_in_post/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.mentionedInPost')}`
--- a/backend/src/emails/templates/post_in_group/html.pug
+++ b/backend/src/emails/templates/post_in_group/html.pug
@ -0,0 +1,7 @@
+extend ../layout.pug
+
+block content
+  .content
+  - var postUrl = postUrl
+  p= t('postInGroup', { postTitle})
+  a.button(href=postUrl)= t('buttons.viewPost')
--- a/backend/src/emails/templates/post_in_group/subject.pug
+++ b/backend/src/emails/templates/post_in_group/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.postInGroup')}`
--- a/backend/src/emails/templates/removed_user_from_group/html.pug
+++ b/backend/src/emails/templates/removed_user_from_group/html.pug
@ -0,0 +1,5 @@
+extend ../layout.pug
+
+block content
+  .content
+  p= t('removedUserFromGroup', { groupName })
--- a/backend/src/emails/templates/removed_user_from_group/subject.pug
+++ b/backend/src/emails/templates/removed_user_from_group/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.removedUserFromGroup')}`
--- a/backend/src/emails/templates/user_joined_group/html.pug
+++ b/backend/src/emails/templates/user_joined_group/html.pug
@ -0,0 +1,8 @@
+extend ../layout.pug
+
+block content
+  .content
+  p
+    a.user(href=groupRelatedUserUrl)= groupRelatedUserName  
+    = t('userJoinedGroup', { groupName })
+  a.button(href=groupUrl)= t('buttons.viewGroup')
--- a/backend/src/emails/templates/user_joined_group/subject.pug
+++ b/backend/src/emails/templates/user_joined_group/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.userJoinedGroup')}`
--- a/backend/src/emails/templates/user_left_group/html.pug
+++ b/backend/src/emails/templates/user_left_group/html.pug
@ -0,0 +1,8 @@
+extend ../layout.pug
+
+block content
+  .content
+  p
+    a.user(href=groupRelatedUserUrl)= groupRelatedUserName    
+    = t('userLeftGroup', { groupName })
+  a.button(href=groupUrl)= t('buttons.viewGroup')
--- a/backend/src/emails/templates/user_left_group/subject.pug
+++ b/backend/src/emails/templates/user_left_group/subject.pug
@ -0,0 +1 @@
+= `${APPLICATION_NAME}  – ${t('notification')}: ${t('subjects.userLeftGroup')}`
--- a/backend/src/graphql/resolvers/Upload.ts
+++ b/backend/src/graphql/resolvers/Upload.ts
--- a/backend/src/graphql/resolvers/badges.spec.ts
+++ b/backend/src/graphql/resolvers/badges.spec.ts
--- a/backend/src/graphql/resolvers/badges.ts
+++ b/backend/src/graphql/resolvers/badges.ts
--- a/backend/src/graphql/resolvers/comments.spec.ts
+++ b/backend/src/graphql/resolvers/comments.spec.ts
@ -2,40 +2,41 @@
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 /* eslint-disable @typescript-eslint/no-unsafe-call */
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
+import { ApolloServer } from 'apollo-server-express'
 import { createTestClient } from 'apollo-server-testing'
 import gql from 'graphql-tag'

+import databaseContext from '@context/database'
 import Factory, { cleanDatabase } from '@db/factories'
-import { getNeode, getDriver } from '@db/neo4j'
-import createServer from '@src/server'
+import createServer, { getContext } from '@src/server'

-const driver = getDriver()
-const neode = getNeode()
+const database = databaseContext()

 let variables, mutate, authenticatedUser, commentAuthor, newlyCreatedComment

+let server: ApolloServer
 beforeAll(async () => {
  await cleanDatabase()

-  const { server } = createServer({
-    context: () => {
-      return {
-        driver,
-        user: authenticatedUser,
-      }
-    },
-  })
+  // eslint-disable-next-line @typescript-eslint/no-unsafe-return, @typescript-eslint/require-await
+  const contextUser = async (_req) => authenticatedUser
+  const context = getContext({ user: contextUser, database })
+
+  server = createServer({ context }).server
+
  mutate = createTestClient(server).mutate
 })

 afterAll(async () => {
  await cleanDatabase()
-  await driver.close()
+  void server.stop()
+  void database.driver.close()
+  database.neode.close()
 })

 beforeEach(async () => {
  variables = {}
-  await neode.create('Category', {
+  await database.neode.create('Category', {
    id: 'cat9',
    name: 'Democracy & Politics',
    icon: 'university',
@ -103,7 +104,7 @@ describe('CreateComment', () => {

  describe('authenticated', () => {
    beforeEach(async () => {
-      const user = await neode.create('User', { name: 'Author' })
+      const user = await database.neode.create('User', { name: 'Author' })
      authenticatedUser = await user.toJson()
    })

--- a/backend/src/graphql/resolvers/comments.ts
+++ b/backend/src/graphql/resolvers/comments.ts
--- a/backend/src/graphql/resolvers/donations.spec.ts
+++ b/backend/src/graphql/resolvers/donations.spec.ts
--- a/backend/src/graphql/resolvers/donations.ts
+++ b/backend/src/graphql/resolvers/donations.ts
--- a/backend/src/graphql/resolvers/emails.spec.ts
+++ b/backend/src/graphql/resolvers/emails.spec.ts
--- a/backend/src/graphql/resolvers/emails.ts
+++ b/backend/src/graphql/resolvers/emails.ts
--- a/backend/src/graphql/resolvers/embeds.spec.ts
+++ b/backend/src/graphql/resolvers/embeds.spec.ts
--- a/backend/src/graphql/resolvers/embeds.ts
+++ b/backend/src/graphql/resolvers/embeds.ts
--- a/backend/src/graphql/resolvers/embeds/findProvider.spec.ts
+++ b/backend/src/graphql/resolvers/embeds/findProvider.spec.ts
--- a/backend/src/graphql/resolvers/embeds/findProvider.ts
+++ b/backend/src/graphql/resolvers/embeds/findProvider.ts
--- a/backend/src/graphql/resolvers/embeds/scraper.ts
+++ b/backend/src/graphql/resolvers/embeds/scraper.ts
--- a/backend/src/graphql/resolvers/filter-posts.spec.ts
+++ b/backend/src/graphql/resolvers/filter-posts.spec.ts
--- a/backend/src/graphql/resolvers/follow.spec.ts
+++ b/backend/src/graphql/resolvers/follow.spec.ts
--- a/backend/src/graphql/resolvers/follow.ts
+++ b/backend/src/graphql/resolvers/follow.ts
@ -1,7 +1,5 @@
 /* eslint-disable @typescript-eslint/no-unsafe-argument */
-
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
-
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 import { getNeode } from '@db/neo4j'

--- a/backend/src/graphql/resolvers/groups.spec.ts
+++ b/backend/src/graphql/resolvers/groups.spec.ts
@ -6,8 +6,8 @@
 import { createTestClient } from 'apollo-server-testing'

 import CONFIG from '@config/index'
+import databaseContext from '@context/database'
 import Factory, { cleanDatabase } from '@db/factories'
-import { getNeode, getDriver } from '@db/neo4j'
 import { changeGroupMemberRoleMutation } from '@graphql/queries/changeGroupMemberRoleMutation'
 import { createGroupMutation } from '@graphql/queries/createGroupMutation'
 import { groupMembersQuery } from '@graphql/queries/groupMembersQuery'
@ -16,10 +16,7 @@ import { joinGroupMutation } from '@graphql/queries/joinGroupMutation'
 import { leaveGroupMutation } from '@graphql/queries/leaveGroupMutation'
 import { removeUserFromGroupMutation } from '@graphql/queries/removeUserFromGroupMutation'
 import { updateGroupMutation } from '@graphql/queries/updateGroupMutation'
-import createServer from '@src/server'
-
-const driver = getDriver()
-const neode = getNeode()
+import createServer, { getContext } from '@src/server'

 let authenticatedUser
 let user
@ -35,15 +32,12 @@ const descriptionAdditional100 =
  ' 123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789'
 let variables = {}

-const { server } = createServer({
-  context: () => {
-    return {
-      driver,
-      neode,
-      user: authenticatedUser,
-    }
-  },
-})
+const database = databaseContext()
+// eslint-disable-next-line @typescript-eslint/no-unsafe-return
+const contextUser = async (_req) => authenticatedUser
+const context = getContext({ user: contextUser, database })
+
+const { server } = createServer({ context })
 const { mutate, query } = createTestClient(server)

 const seedBasicsAndClearAuthentication = async () => {
@ -60,25 +54,25 @@ const seedBasicsAndClearAuthentication = async () => {
    },
  )
  await Promise.all([
-    neode.create('Category', {
+    database.neode.create('Category', {
      id: 'cat4',
      name: 'Environment & Nature',
      slug: 'environment-nature',
      icon: 'tree',
    }),
-    neode.create('Category', {
+    database.neode.create('Category', {
      id: 'cat9',
      name: 'Democracy & Politics',
      slug: 'democracy-politics',
      icon: 'university',
    }),
-    neode.create('Category', {
+    database.neode.create('Category', {
      id: 'cat15',
      name: 'Consumption & Sustainability',
      slug: 'consumption-sustainability',
      icon: 'shopping-cart',
    }),
-    neode.create('Category', {
+    database.neode.create('Category', {
      id: 'cat27',
      name: 'Animal Protection',
      slug: 'animal-protection',
@ -241,7 +235,9 @@ beforeAll(async () => {

 afterAll(async () => {
  await cleanDatabase()
-  await driver.close()
+  void server.stop()
+  void database.driver.close()
+  database.neode.close()
 })

 describe('in mode', () => {
--- a/backend/src/graphql/resolvers/groups.ts
+++ b/backend/src/graphql/resolvers/groups.ts
@ -12,6 +12,7 @@ import CONFIG from '@config/index'
 import { CATEGORIES_MIN, CATEGORIES_MAX } from '@constants/categories'
 import { DESCRIPTION_WITHOUT_HTML_LENGTH_MIN } from '@constants/groups'
 import { removeHtmlTags } from '@middleware/helpers/cleanHtml'
+import type { Context } from '@src/server'

 import Resolver, {
  removeUndefinedNullValuesFromObject,
@ -22,7 +23,7 @@ import { createOrUpdateLocations } from './users/location'

 export default {
  Query: {
-    Group: async (_object, params, context, _resolveInfo) => {
+    Group: async (_object, params, context: Context, _resolveInfo) => {
      const { isMember, id, slug, first, offset } = params
      let pagination = ''
      const orderBy = 'ORDER BY group.createdAt DESC'
@ -75,10 +76,10 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    GroupMembers: async (_object, params, context, _resolveInfo) => {
+    GroupMembers: async (_object, params, context: Context, _resolveInfo) => {
      const { id: groupId } = params
      const session = context.driver.session()
      const readTxResultPromise = session.readTransaction(async (txc) => {
@ -96,7 +97,7 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
    GroupCount: async (_object, params, context, _resolveInfo) => {
@ -134,7 +135,7 @@ export default {
    },
  },
  Mutation: {
-    CreateGroup: async (_parent, params, context, _resolveInfo) => {
+    CreateGroup: async (_parent, params, context: Context, _resolveInfo) => {
      const { categoryIds } = params
      delete params.categoryIds
      params.locationName = params.locationName === '' ? null : params.locationName
@ -182,7 +183,7 @@ export default {
          `,
          { userId: context.user.id, categoryIds, params },
        )
-        const [group] = await ownerCreateGroupTransactionResponse.records.map((record) =>
+        const [group] = ownerCreateGroupTransactionResponse.records.map((record) =>
          record.get('group'),
        )
        return group
@ -197,10 +198,10 @@ export default {
          throw new UserInputError('Group with this slug already exists!')
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    UpdateGroup: async (_parent, params, context, _resolveInfo) => {
+    UpdateGroup: async (_parent, params, context: Context, _resolveInfo) => {
      const { categoryIds } = params
      delete params.categoryIds
      const { id: groupId, avatar: avatarInput } = params
@ -257,7 +258,7 @@ export default {
          categoryIds,
          params,
        })
-        const [group] = await transactionResponse.records.map((record) => record.get('group'))
+        const [group] = transactionResponse.records.map((record) => record.get('group'))
        if (avatarInput) {
          await mergeImage(group, 'AVATAR_IMAGE', avatarInput, { transaction })
        }
@ -273,10 +274,10 @@ export default {
          throw new UserInputError('Group with this slug already exists!')
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    JoinGroup: async (_parent, params, context, _resolveInfo) => {
+    JoinGroup: async (_parent, params, context: Context, _resolveInfo) => {
      const { groupId, userId } = params
      const session = context.driver.session()
      const writeTxResultPromise = session.writeTransaction(async (transaction) => {
@ -294,7 +295,7 @@ export default {
          RETURN member {.*, myRoleInGroup: membership.role}
        `
        const transactionResponse = await transaction.run(joinGroupCypher, { groupId, userId })
-        const [member] = await transactionResponse.records.map((record) => record.get('member'))
+        const [member] = transactionResponse.records.map((record) => record.get('member'))
        return member
      })
      try {
@ -302,10 +303,10 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    LeaveGroup: async (_parent, params, context, _resolveInfo) => {
+    LeaveGroup: async (_parent, params, context: Context, _resolveInfo) => {
      const { groupId, userId } = params
      const session = context.driver.session()
      try {
@ -313,10 +314,10 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    ChangeGroupMemberRole: async (_parent, params, context, _resolveInfo) => {
+    ChangeGroupMemberRole: async (_parent, params, context: Context, _resolveInfo) => {
      const { groupId, userId, roleInGroup } = params
      const session = context.driver.session()
      const writeTxResultPromise = session.writeTransaction(async (transaction) => {
@ -353,7 +354,7 @@ export default {
          userId,
          roleInGroup,
        })
-        const [member] = await transactionResponse.records.map((record) => record.get('member'))
+        const [member] = transactionResponse.records.map((record) => record.get('member'))
        return member
      })
      try {
@ -361,10 +362,10 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    RemoveUserFromGroup: async (_parent, params, context, _resolveInfo) => {
+    RemoveUserFromGroup: async (_parent, params, context: Context, _resolveInfo) => {
      const { groupId, userId } = params
      const session = context.driver.session()
      try {
@ -372,10 +373,10 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    muteGroup: async (_parent, params, context, _resolveInfo) => {
+    muteGroup: async (_parent, params, context: Context, _resolveInfo) => {
      const { groupId } = params
      const userId = context.user.id
      const session = context.driver.session()
@ -393,7 +394,7 @@ export default {
            userId,
          },
        )
-        const [group] = await transactionResponse.records.map((record) => record.get('group'))
+        const [group] = transactionResponse.records.map((record) => record.get('group'))
        return group
      })
      try {
@ -401,10 +402,10 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
-    unmuteGroup: async (_parent, params, context, _resolveInfo) => {
+    unmuteGroup: async (_parent, params, context: Context, _resolveInfo) => {
      const { groupId } = params
      const userId = context.user.id
      const session = context.driver.session()
@ -422,7 +423,7 @@ export default {
            userId,
          },
        )
-        const [group] = await transactionResponse.records.map((record) => record.get('group'))
+        const [group] = transactionResponse.records.map((record) => record.get('group'))
        return group
      })
      try {
@ -430,7 +431,7 @@ export default {
      } catch (error) {
        throw new Error(error)
      } finally {
-        session.close()
+        await session.close()
      }
    },
  },
--- a/backend/src/graphql/resolvers/helpers/Resolver.ts
+++ b/backend/src/graphql/resolvers/helpers/Resolver.ts
--- a/backend/src/graphql/resolvers/helpers/createPasswordReset.ts
+++ b/backend/src/graphql/resolvers/helpers/createPasswordReset.ts
--- a/backend/src/graphql/resolvers/helpers/events.ts
+++ b/backend/src/graphql/resolvers/helpers/events.ts
--- a/backend/src/graphql/resolvers/helpers/existingEmailAddress.ts
+++ b/backend/src/graphql/resolvers/helpers/existingEmailAddress.ts
--- a/Show More
+++ b/Show More
				`@ -0,0 +1 @@`
				= `${APPLICATION_NAME} – ${t('notification')}: ${t('subjects.changedGroupMemberRole')}`