From 927da4ffb8fb1b97534227488485d74f1ec0faca Mon Sep 17 00:00:00 2001
From: Moriz Wahl <moriz.wahl@gmx.de>
Date: Thu, 30 Mar 2023 10:28:47 +0200
Subject: [PATCH] feat(backend): event parameters

---
 .../src/schema/resolvers/helpers/events.js    | 22 +++++++++++++++++++
 backend/src/schema/resolvers/posts.js         | 14 ++++++++++++
 backend/src/schema/types/type/Post.gql        | 14 ++++++++++++
 3 files changed, 50 insertions(+)
 create mode 100644 backend/src/schema/resolvers/helpers/events.js

diff --git a/backend/src/schema/resolvers/helpers/events.js b/backend/src/schema/resolvers/helpers/events.js
new file mode 100644
index 000000000..b725d1e5f
--- /dev/null
+++ b/backend/src/schema/resolvers/helpers/events.js
@@ -0,0 +1,22 @@
+import { UserInputError } from 'apollo-server'
+
+export const validateEventParams = (params) => {
+  const { eventInput } = params
+  validateEventDate(eventInput.eventStart)
+  params.eventStart = eventInput.eventStart
+  if (eventInput.eventLocation && !eventInput.eventVenue) {
+    throw new UserInputError('Event venue must be present if event location is given!')
+  }
+  params.eventVenue = eventInput.eventVenue
+  params.eventLocation = eventInput.eventLocation
+}
+
+const validateEventDate = (dateString) => {
+  const date = new Date(dateString)
+  if (date.toString() === 'Invalid Date')
+    throw new UserInputError('Event start date must be a valid date!')
+  const now = new Date()
+  if (date.getTime() < now.getTime()) {
+    throw new UserInputError('Event start date must be in the future!')
+  }
+}
diff --git a/backend/src/schema/resolvers/posts.js b/backend/src/schema/resolvers/posts.js
index b21373d89..4afa10c77 100644
--- a/backend/src/schema/resolvers/posts.js
+++ b/backend/src/schema/resolvers/posts.js
@@ -7,6 +7,8 @@ import Resolver from './helpers/Resolver'
 import { filterForMutedUsers } from './helpers/filterForMutedUsers'
 import { filterInvisiblePosts } from './helpers/filterInvisiblePosts'
 import { filterPostsOfMyGroups } from './helpers/filterPostsOfMyGroups'
+import { validateEventParams } from './helpers/events'
+import { createOrUpdateLocations } from './users/location'
 import CONFIG from '../../config'
 
 const maintainPinnedPosts = (params) => {
@@ -81,6 +83,15 @@ export default {
     CreatePost: async (_parent, params, context, _resolveInfo) => {
       const { categoryIds, groupId } = params
       const { image: imageInput } = params
+
+      if (params.postType && params.postType === 'Event') {
+        validateEventParams(params)
+      }
+      delete params.eventInput
+
+      const locationName = params.eventLocation ? params.eventLocation : null
+      delete params.eventLoaction
+
       delete params.categoryIds
       delete params.image
       delete params.groupId
@@ -143,6 +154,9 @@ export default {
       })
       try {
         const post = await writeTxResultPromise
+        if (locationName) {
+          await createOrUpdateLocations('Post', post.id, locationName, session)
+        }
         return post
       } catch (e) {
         if (e.code === 'Neo.ClientError.Schema.ConstraintValidationFailed')
diff --git a/backend/src/schema/types/type/Post.gql b/backend/src/schema/types/type/Post.gql
index 2b4427326..c35ee7054 100644
--- a/backend/src/schema/types/type/Post.gql
+++ b/backend/src/schema/types/type/Post.gql
@@ -171,14 +171,26 @@ type Post {
     @cypher(statement: "MATCH (this)<-[emoted:EMOTED]-(:User) RETURN COUNT(DISTINCT emoted)")
 
   group: Group @relation(name: "IN", direction: "OUT")
+
   postType: [PostType]
     @cypher(statement: "RETURN filter(l IN labels(this) WHERE NOT l = 'Post')")
+
+  eventLocationName: String
+  eventLocation: Location @cypher(statement: "MATCH (this)-[:IS_IN]->(l:Location) RETURN l")
+  eventVenue: String
+  eventStart: String
 }
 
 input _PostInput {
   id: ID!
 }
 
+input _EventInput {
+  eventStart: String!
+  eventLocation: String
+  eventVenue: String
+}
+
 type Mutation {
   CreatePost(
     id: ID
@@ -192,6 +204,7 @@ type Mutation {
     contentExcerpt: String
     groupId: ID
     postType: PostType = Article
+    eventInput: _EventInput
   ): Post
   UpdatePost(
     id: ID!
@@ -204,6 +217,7 @@ type Mutation {
     language: String
     categoryIds: [ID]
     postType: PostType
+    eventInput: _EventInput
   ): Post
   DeletePost(id: ID!): Post
   AddPostEmotions(to: _PostInput!, data: _EMOTEDInput!): EMOTED