Merge pull request #2041 from gradido/statistics-resolver

feat: Statistics Resolver

admin/src/graphql/communityStatistics.js

@@ -0,0 +1,15 @@
+import gql from 'graphql-tag'
+
+export const communityStatistics = gql`
+  query {
+    communityStatistics {
+      totalUsers
+      activeUsers
+      deletedUsers
+      totalGradidoCreated
+      totalGradidoDecayed
+      totalGradidoAvailable
+      totalGradidoUnbookedDecayed
+    }
+  }
+`

backend/src/auth/RIGHTS.ts

@@ -31,6 +31,7 @@ export enum RIGHTS {
   LIST_ALL_CONTRIBUTIONS = 'LIST_ALL_CONTRIBUTIONS',
   UPDATE_CONTRIBUTION = 'UPDATE_CONTRIBUTION',
   LIST_CONTRIBUTION_LINKS = 'LIST_CONTRIBUTION_LINKS',
+  COMMUNITY_STATISTICS = 'COMMUNITY_STATISTICS',
   SEARCH_ADMIN_USERS = 'SEARCH_ADMIN_USERS',
   // Admin
   SEARCH_USERS = 'SEARCH_USERS',

backend/src/auth/ROLES.ts

@@ -30,6 +30,7 @@ export const ROLE_USER = new Role('user', [
   RIGHTS.UPDATE_CONTRIBUTION,
   RIGHTS.SEARCH_ADMIN_USERS,
   RIGHTS.LIST_CONTRIBUTION_LINKS,
+  RIGHTS.COMMUNITY_STATISTICS,
 ])
 export const ROLE_ADMIN = new Role('admin', Object.values(RIGHTS)) // all rights
 

backend/src/graphql/model/CommunityStatistics.ts

@@ -0,0 +1,26 @@
+import { ObjectType, Field } from 'type-graphql'
+import Decimal from 'decimal.js-light'
+
+@ObjectType()
+export class CommunityStatistics {
+  @Field(() => Number)
+  totalUsers: number
+
+  @Field(() => Number)
+  activeUsers: number
+
+  @Field(() => Number)
+  deletedUsers: number
+
+  @Field(() => Decimal)
+  totalGradidoCreated: Decimal
+
+  @Field(() => Decimal)
+  totalGradidoDecayed: Decimal
+
+  @Field(() => Decimal)
+  totalGradidoAvailable: Decimal
+
+  @Field(() => Decimal)
+  totalGradidoUnbookedDecayed: Decimal
+}

backend/src/graphql/resolver/StatisticsResolver.ts

@@ -0,0 +1,77 @@
+import { Resolver, Query, Authorized } from 'type-graphql'
+import { RIGHTS } from '@/auth/RIGHTS'
+import { CommunityStatistics } from '@model/CommunityStatistics'
+import { User as DbUser } from '@entity/User'
+import { Transaction as DbTransaction } from '@entity/Transaction'
+import { getConnection } from '@dbTools/typeorm'
+import Decimal from 'decimal.js-light'
+import { calculateDecay } from '@/util/decay'
+
+@Resolver()
+export class StatisticsResolver {
+  @Authorized([RIGHTS.COMMUNITY_STATISTICS])
+  @Query(() => CommunityStatistics)
+  async communityStatistics(): Promise<CommunityStatistics> {
+    const allUsers = await DbUser.find({ withDeleted: true })
+
+    let totalUsers = 0
+    let activeUsers = 0
+    let deletedUsers = 0
+
+    let totalGradidoAvailable: Decimal = new Decimal(0)
+    let totalGradidoUnbookedDecayed: Decimal = new Decimal(0)
+
+    const receivedCallDate = new Date()
+
+    for (let i = 0; i < allUsers.length; i++) {
+      if (allUsers[i].deletedAt) {
+        deletedUsers++
+      } else {
+        totalUsers++
+        const lastTransaction = await DbTransaction.findOne({
+          where: { userId: allUsers[i].id },
+          order: { balanceDate: 'DESC' },
+        })
+        if (lastTransaction) {
+          activeUsers++
+          const decay = calculateDecay(
+            lastTransaction.balance,
+            lastTransaction.balanceDate,
+            receivedCallDate,
+          )
+          if (decay) {
+            totalGradidoAvailable = totalGradidoAvailable.plus(decay.balance.toString())
+            totalGradidoUnbookedDecayed = totalGradidoUnbookedDecayed.plus(decay.decay.toString())
+          }
+        }
+      }
+    }
+
+    const queryRunner = getConnection().createQueryRunner()
+    await queryRunner.connect()
+
+    const { totalGradidoCreated } = await queryRunner.manager
+      .createQueryBuilder()
+      .select('SUM(transaction.amount) AS totalGradidoCreated')
+      .from(DbTransaction, 'transaction')
+      .where('transaction.typeId = 1')
+      .getRawOne()
+
+    const { totalGradidoDecayed } = await queryRunner.manager
+      .createQueryBuilder()
+      .select('SUM(transaction.decay) AS totalGradidoDecayed')
+      .from(DbTransaction, 'transaction')
+      .where('transaction.decay IS NOT NULL')
+      .getRawOne()
+
+    return {
+      totalUsers,
+      activeUsers,
+      deletedUsers,
+      totalGradidoCreated,
+      totalGradidoDecayed,
+      totalGradidoAvailable,
+      totalGradidoUnbookedDecayed,
+    }
+  }
+}