feature(database-connection): Adapt new requests to database

backend/src/database/database.service.ts

@@ -1,8 +1,8 @@
 import { Injectable } from '@nestjs/common';
-import { PrismaClient } from '@prisma/client';
+import { PrismaClient, seasons, timetracker, user, ranks } from '@prisma/client';
 import logger from 'src/logger/Logger';
-import { TableEntry } from 'src/models/TableEntry';
 import { TimeTrackerPredicate } from './timetracking.predicate';
+import { SeasonInfo, TimeTrackerStats, UserStatsResponse } from '../models/aliases';
 
 @Injectable()
 export class DatabaseService {
@@ -19,17 +19,78 @@ export class DatabaseService {
         private readonly timetrackerPredicate: TimeTrackerPredicate
     ) {}
 
-    public fetchStats(): Promise<TableEntry[]> {
-        return new Promise((resolve, reject) => {
-            this.prismaClient.timetracker.findMany({
-                include: {
-                    user: true,
-                    ranks: true
+    public fetchSeasonInfos = async (seasonId: string): Promise<SeasonInfo> => {
+        let seasons
+        return this.prismaClient.seasons.findOne({
+            where: {
+                // eslint-disable-next-line @typescript-eslint/camelcase
+                season_id: Number(seasonId)
+            }
+        })
+          .then(result => seasons = result)
+          .then(this.fetchMaxSeasonId)
+          .then(result => {
+              seasons.maxSeasonId = result
+              return seasons
+          })
+    };
+
+    public fetchStats = async (seasonId: string): Promise<UserStatsResponse> => {
+        let response
+        return this.fetchSeasonInfos(seasonId)
+          .then(result => {
+              response = {
+                  seasonId: result.season_id,
+                  maxSeasonid: result.maxSeasonId,
+                  dates: {
+                      start: result.start_date,
+                      end: result.end_date
+                  }
+              }
+              return result.season_id.toString()
+          })
+          .then(this.fetchTimeTrackerStats)
+          .then(this.timetrackerPredicate.process)
+          .then(result => {
+              response.stats = result
+              return response
+          })
+    };
+
+    // public fetchStats = async (seasonId: string): Promise<TableEntry[]> => this.prismaClient.timetracker.findMany({
+    //     include: {
+    //         user: true,
+    //         ranks: true
+    //     },
+    //     where: {
+    //         // eslint-disable-next-line @typescript-eslint/camelcase
+    //         season_id: Number(seasonId)
+    //     }
+    // })
+    //   .then(this.timetrackerPredicate.process);
+
+    fetchTimeTrackerStats: (string) => Promise<TimeTrackerStats[]> = (seasonId: string) => this.prismaClient.timetracker.findMany({
+        include: {
+            user: true,
+            ranks: true
+        },
+        where: {
+            // eslint-disable-next-line @typescript-eslint/camelcase
+            season_id: Number(seasonId)
+        }
+    })
+
+    fetchMaxSeasonId: () => Promise<number> = () => new Promise(
+        (resolve, reject) => {
+            this.prismaClient.seasons.aggregate({
+                max: {
+                    // eslint-disable-next-line @typescript-eslint/camelcase
+                    season_id: true
                 }
             })
-            .then(this.timetrackerPredicate.process)
-            .then(result => resolve(result))
-            .catch(err => reject(err));
-        });
-    }
+              .then(result => result.max.season_id)
+              .then(resolve)
+              .catch(reject)
+        }
+    )
 }