From a0c28e2324ddd1e2726d419a2d144fbd3f03abd6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Julian=20T=C3=B6lle?= <julian.toelle97@gmail.com>
Date: Tue, 26 Oct 2021 20:09:52 +0200
Subject: [PATCH] feat: top genres report

---
 frontend/src/App.tsx                          |   2 +
 frontend/src/api/api.ts                       |  39 ++++++
 frontend/src/api/entities/genre.ts            |   4 +
 frontend/src/api/entities/top-genres-item.ts  |   8 ++
 .../src/api/entities/top-genres-options.ts    |   5 +
 frontend/src/components/NavBar.tsx            |   3 +
 frontend/src/components/ReportTopGenres.tsx   | 106 +++++++++++++++
 frontend/src/components/TopListItem.tsx       |   2 +-
 frontend/src/hooks/use-api.tsx                |  19 +++
 frontend/src/util/capitalizeString.ts         |   8 ++
 .../migrations/05-CreateGenreTables.ts        |  44 -------
 src/music-library/album.entity.ts             |   4 -
 src/music-library/artist.entity.ts            |   9 +-
 src/music-library/dto/create-album.dto.ts     |   2 -
 src/music-library/music-library.service.ts    |   1 +
 src/reports/dto/get-top-genres-report.dto.ts  |  10 ++
 src/reports/dto/top-genres-report.dto.ts      |  10 ++
 src/reports/reports.controller.ts             |  10 ++
 src/reports/reports.service.ts                | 123 ++++++++++++------
 .../spotify-api/entities/album-object.ts      |   7 -
 src/sources/spotify/spotify.service.ts        |   5 -
 21 files changed, 317 insertions(+), 104 deletions(-)
 create mode 100644 frontend/src/api/entities/genre.ts
 create mode 100644 frontend/src/api/entities/top-genres-item.ts
 create mode 100644 frontend/src/api/entities/top-genres-options.ts
 create mode 100644 frontend/src/components/ReportTopGenres.tsx
 create mode 100644 frontend/src/util/capitalizeString.ts
 create mode 100644 src/reports/dto/get-top-genres-report.dto.ts
 create mode 100644 src/reports/dto/top-genres-report.dto.ts

diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index d91debc..90db453 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -8,6 +8,7 @@ import { RecentListens } from "./components/RecentListens";
 import { ReportListens } from "./components/ReportListens";
 import { ReportTopAlbums } from "./components/ReportTopAlbums";
 import { ReportTopArtists } from "./components/ReportTopArtists";
+import { ReportTopGenres } from "./components/ReportTopGenres";
 import { ReportTopTracks } from "./components/ReportTopTracks";
 import { useAuth } from "./hooks/use-auth";
 import "./tailwind/generated.css";
@@ -38,6 +39,7 @@ export function App() {
           />
           <Route path="/reports/top-albums" exact component={ReportTopAlbums} />
           <Route path="/reports/top-tracks" exact component={ReportTopTracks} />
+          <Route path="/reports/top-genres" exact component={ReportTopGenres} />
         </Switch>
       </main>
       <footer>
diff --git a/frontend/src/api/api.ts b/frontend/src/api/api.ts
index 6b01a34..945e157 100644
--- a/frontend/src/api/api.ts
+++ b/frontend/src/api/api.ts
@@ -9,6 +9,8 @@ import { TopAlbumsItem } from "./entities/top-albums-item";
 import { TopAlbumsOptions } from "./entities/top-albums-options";
 import { TopArtistsItem } from "./entities/top-artists-item";
 import { TopArtistsOptions } from "./entities/top-artists-options";
+import { TopGenresItem } from "./entities/top-genres-item";
+import { TopGenresOptions } from "./entities/top-genres-options";
 import { TopTracksItem } from "./entities/top-tracks-item";
 import { TopTracksOptions } from "./entities/top-tracks-options";
 
@@ -188,3 +190,40 @@ export const getTopTracks = async (
   } = res;
   return items;
 };
+
+export const getTopGenres = async (
+  options: TopGenresOptions,
+  client: AxiosInstance
+): Promise<TopGenresItem[]> => {
+  const {
+    time: { timePreset, customTimeStart, customTimeEnd },
+  } = options;
+
+  const res = await client.get<{ items: TopGenresItem[] }>(
+    `/api/v1/reports/top-Genres`,
+    {
+      params: {
+        timePreset,
+        customTimeStart: formatISO(customTimeStart),
+        customTimeEnd: formatISO(customTimeEnd),
+      },
+    }
+  );
+
+  switch (res.status) {
+    case 200: {
+      break;
+    }
+    case 401: {
+      throw new UnauthenticatedError(`No token or token expired`);
+    }
+    default: {
+      throw new Error(`Unable to getTopGenres: ${res.status}`);
+    }
+  }
+
+  const {
+    data: { items },
+  } = res;
+  return items;
+};
diff --git a/frontend/src/api/entities/genre.ts b/frontend/src/api/entities/genre.ts
new file mode 100644
index 0000000..3d076be
--- /dev/null
+++ b/frontend/src/api/entities/genre.ts
@@ -0,0 +1,4 @@
+export interface Genre {
+  id: string;
+  name: string;
+}
diff --git a/frontend/src/api/entities/top-genres-item.ts b/frontend/src/api/entities/top-genres-item.ts
new file mode 100644
index 0000000..4f19544
--- /dev/null
+++ b/frontend/src/api/entities/top-genres-item.ts
@@ -0,0 +1,8 @@
+import { Genre } from "./genre";
+import { TopArtistsItem } from "./top-artists-item";
+
+export interface TopGenresItem {
+  genre: Genre;
+  artists: TopArtistsItem[];
+  count: number;
+}
diff --git a/frontend/src/api/entities/top-genres-options.ts b/frontend/src/api/entities/top-genres-options.ts
new file mode 100644
index 0000000..8879d87
--- /dev/null
+++ b/frontend/src/api/entities/top-genres-options.ts
@@ -0,0 +1,5 @@
+import { TimeOptions } from "./time-options";
+
+export interface TopGenresOptions {
+  time: TimeOptions;
+}
diff --git a/frontend/src/components/NavBar.tsx b/frontend/src/components/NavBar.tsx
index 294018f..5b7b9b4 100644
--- a/frontend/src/components/NavBar.tsx
+++ b/frontend/src/components/NavBar.tsx
@@ -34,6 +34,9 @@ export const NavBar: React.FC = () => {
               <Link to="/reports/top-tracks">
                 <NavItem>Top Tracks</NavItem>
               </Link>
+              <Link to="/reports/top-genres">
+                <NavItem>Top Genres</NavItem>
+              </Link>
             </>
           )}
         </div>
diff --git a/frontend/src/components/ReportTopGenres.tsx b/frontend/src/components/ReportTopGenres.tsx
new file mode 100644
index 0000000..99ce572
--- /dev/null
+++ b/frontend/src/components/ReportTopGenres.tsx
@@ -0,0 +1,106 @@
+import React, { useMemo, useState } from "react";
+import { Redirect } from "react-router-dom";
+import { Artist } from "../api/entities/artist";
+import { Genre } from "../api/entities/genre";
+import { TimeOptions } from "../api/entities/time-options";
+import { TimePreset } from "../api/entities/time-preset.enum";
+import { TopArtistsItem } from "../api/entities/top-artists-item";
+import { useTopGenres } from "../hooks/use-api";
+import { useAuth } from "../hooks/use-auth";
+import { capitalizeString } from "../util/capitalizeString";
+import { getMaxCount } from "../util/getMaxCount";
+import { ReportTimeOptions } from "./ReportTimeOptions";
+import { TopListItem } from "./TopListItem";
+
+export const ReportTopGenres: React.FC = () => {
+  const { user } = useAuth();
+
+  const [timeOptions, setTimeOptions] = useState<TimeOptions>({
+    timePreset: TimePreset.LAST_90_DAYS,
+    customTimeStart: new Date(0),
+    customTimeEnd: new Date(),
+  });
+
+  const options = useMemo(
+    () => ({
+      time: timeOptions,
+    }),
+    [timeOptions]
+  );
+
+  const { topGenres, isLoading } = useTopGenres(options);
+
+  const reportHasItems = !isLoading && topGenres.length !== 0;
+
+  if (!user) {
+    return <Redirect to="/" />;
+  }
+
+  const maxCount = getMaxCount(topGenres);
+
+  return (
+    <div className="md:flex md:justify-center p-4">
+      <div className="md:flex-shrink-0 min-w-full xl:min-w-0 xl:w-2/3 max-w-screen-lg">
+        <div className="flex justify-between">
+          <p className="text-2xl font-normal text-gray-700">Top Genres</p>
+        </div>
+        <div className="shadow-xl bg-gray-100 rounded p-5 m-2">
+          <ReportTimeOptions
+            timeOptions={timeOptions}
+            setTimeOptions={setTimeOptions}
+          />
+          {isLoading && (
+            <div>
+              <div className="loader rounded-full border-8 h-64 w-64"></div>
+            </div>
+          )}
+          {!reportHasItems && (
+            <div>
+              <p>Report is emtpy! :(</p>
+            </div>
+          )}
+          {reportHasItems &&
+            topGenres.map(({ genre, artists, count }) => (
+              <ReportItem
+                genre={genre}
+                count={count}
+                artists={artists}
+                maxCount={maxCount}
+              />
+            ))}
+        </div>
+      </div>
+    </div>
+  );
+};
+
+const ReportItem: React.FC<{
+  genre: Genre;
+  artists: TopArtistsItem[];
+  count: number;
+  maxCount: number;
+}> = ({ genre, artists, count, maxCount }) => {
+  const artistList = artists
+    .map(({ artist, count: artistCount }) => (
+      <ArtistItem artist={artist} count={artistCount} />
+    ))
+    // @ts-expect-error
+    .reduce((acc, curr) => (acc === null ? [curr] : [acc, ", ", curr]), null);
+
+  return (
+    <TopListItem
+      key={genre.id}
+      title={capitalizeString(genre.name)}
+      subTitle={artistList}
+      count={count}
+      maxCount={maxCount}
+    />
+  );
+};
+
+const ArtistItem: React.FC<{
+  artist: Artist;
+  count: number;
+}> = ({ artist, count }) => (
+  <span title={`Listens: ${count}`}>{artist.name}</span>
+);
diff --git a/frontend/src/components/TopListItem.tsx b/frontend/src/components/TopListItem.tsx
index c678610..5e0ca81 100644
--- a/frontend/src/components/TopListItem.tsx
+++ b/frontend/src/components/TopListItem.tsx
@@ -3,7 +3,7 @@ import React from "react";
 export interface TopListItemProps {
   key: string;
   title: string;
-  subTitle?: string;
+  subTitle?: string | React.ReactNode;
   count: number;
 
   /**
diff --git a/frontend/src/hooks/use-api.tsx b/frontend/src/hooks/use-api.tsx
index 51097a5..c061f27 100644
--- a/frontend/src/hooks/use-api.tsx
+++ b/frontend/src/hooks/use-api.tsx
@@ -4,12 +4,14 @@ import {
   getRecentListens,
   getTopAlbums,
   getTopArtists,
+  getTopGenres,
   getTopTracks,
 } from "../api/api";
 import { ListenReportOptions } from "../api/entities/listen-report-options";
 import { PaginationOptions } from "../api/entities/pagination-options";
 import { TopAlbumsOptions } from "../api/entities/top-albums-options";
 import { TopArtistsOptions } from "../api/entities/top-artists-options";
+import { TopGenresOptions } from "../api/entities/top-genres-options";
 import { TopTracksOptions } from "../api/entities/top-tracks-options";
 import { useApiClient } from "./use-api-client";
 import { useAsync } from "./use-async";
@@ -105,3 +107,20 @@ export const useTopTracks = (options: TopTracksOptions) => {
 
   return { topTracks, isLoading, error };
 };
+
+export const useTopGenres = (options: TopGenresOptions) => {
+  const { client } = useApiClient();
+
+  const fetchData = useMemo(
+    () => () => getTopGenres(options, client),
+    [options, client]
+  );
+
+  const {
+    value: topGenres,
+    pending: isLoading,
+    error,
+  } = useAsync(fetchData, INITIAL_EMPTY_ARRAY);
+
+  return { topGenres, isLoading, error };
+};
diff --git a/frontend/src/util/capitalizeString.ts b/frontend/src/util/capitalizeString.ts
new file mode 100644
index 0000000..87d7e1b
--- /dev/null
+++ b/frontend/src/util/capitalizeString.ts
@@ -0,0 +1,8 @@
+export const capitalizeString = (str: string): string => {
+  const arr = str.split(" ");
+
+  for (var i = 0; i < arr.length; i++) {
+    arr[i] = arr[i].charAt(0).toUpperCase() + arr[i].slice(1);
+  }
+  return arr.join(" ");
+};
diff --git a/src/database/migrations/05-CreateGenreTables.ts b/src/database/migrations/05-CreateGenreTables.ts
index 7d818aa..d08e318 100644
--- a/src/database/migrations/05-CreateGenreTables.ts
+++ b/src/database/migrations/05-CreateGenreTables.ts
@@ -79,53 +79,9 @@ export class CreateGenreTables0000000000005 implements MigrationInterface {
       }),
       true
     );
-
-    await queryRunner.createTable(
-      new Table({
-        name: "artist_genres",
-        columns: [
-          {
-            name: "artistId",
-            type: "uuid",
-            isPrimary: true,
-          },
-          {
-            name: "genreId",
-            type: "uuid",
-            isPrimary: true,
-          },
-        ],
-        indices: [
-          new TableIndex({
-            name: "IDX_ARTIST_GENRES_ARTIST_ID",
-            columnNames: ["artistId"],
-          }),
-          new TableIndex({
-            name: "IDX_ARTIST_GENRES_GENRE_ID",
-            columnNames: ["genreId"],
-          }),
-        ],
-        foreignKeys: [
-          new TableForeignKey({
-            name: "FK_ARTIST_ID",
-            columnNames: ["artistId"],
-            referencedColumnNames: ["id"],
-            referencedTableName: "artist",
-          }),
-          new TableForeignKey({
-            name: "FK_GENRE_ID",
-            columnNames: ["genreId"],
-            referencedColumnNames: ["id"],
-            referencedTableName: "genre",
-          }),
-        ],
-      }),
-      true
-    );
   }
 
   async down(queryRunner: QueryRunner): Promise<void> {
-    await queryRunner.dropTable("album_genres");
     await queryRunner.dropTable("artist_genres");
     await queryRunner.dropTable("genre");
   }
diff --git a/src/music-library/album.entity.ts b/src/music-library/album.entity.ts
index 44ca2a5..e4de0ac 100644
--- a/src/music-library/album.entity.ts
+++ b/src/music-library/album.entity.ts
@@ -8,7 +8,6 @@ import {
 } from "typeorm";
 import { SpotifyLibraryDetails } from "../sources/spotify/spotify-library-details.entity";
 import { Artist } from "./artist.entity";
-import { Genre } from "./genre.entity";
 import { Track } from "./track.entity";
 
 @Entity()
@@ -26,9 +25,6 @@ export class Album {
   @OneToMany(() => Track, (track) => track.album)
   tracks?: Track[];
 
-  @ManyToMany(() => Genre)
-  genres?: Genre[];
-
   @Column(() => SpotifyLibraryDetails)
   spotify: SpotifyLibraryDetails;
 }
diff --git a/src/music-library/artist.entity.ts b/src/music-library/artist.entity.ts
index c2592e7..19d4f06 100644
--- a/src/music-library/artist.entity.ts
+++ b/src/music-library/artist.entity.ts
@@ -1,4 +1,10 @@
-import { Column, Entity, ManyToMany, PrimaryGeneratedColumn } from "typeorm";
+import {
+  Column,
+  Entity,
+  JoinTable,
+  ManyToMany,
+  PrimaryGeneratedColumn,
+} from "typeorm";
 import { SpotifyLibraryDetails } from "../sources/spotify/spotify-library-details.entity";
 import { Album } from "./album.entity";
 import { Genre } from "./genre.entity";
@@ -15,6 +21,7 @@ export class Artist {
   albums?: Album[];
 
   @ManyToMany(() => Genre)
+  @JoinTable({ name: "artist_genres" })
   genres?: Genre[];
 
   @Column(() => SpotifyLibraryDetails)
diff --git a/src/music-library/dto/create-album.dto.ts b/src/music-library/dto/create-album.dto.ts
index 47cb992..3605198 100644
--- a/src/music-library/dto/create-album.dto.ts
+++ b/src/music-library/dto/create-album.dto.ts
@@ -1,10 +1,8 @@
 import { SpotifyLibraryDetails } from "../../sources/spotify/spotify-library-details.entity";
 import { Artist } from "../artist.entity";
-import { Genre } from "../genre.entity";
 
 export class CreateAlbumDto {
   name: string;
   artists: Artist[];
-  genres: Genre[];
   spotify?: SpotifyLibraryDetails;
 }
diff --git a/src/music-library/music-library.service.ts b/src/music-library/music-library.service.ts
index c8477df..25ddb18 100644
--- a/src/music-library/music-library.service.ts
+++ b/src/music-library/music-library.service.ts
@@ -36,6 +36,7 @@ export class MusicLibraryService {
     const artist = this.artistRepository.create();
 
     artist.name = data.name;
+    artist.genres = data.genres;
     artist.spotify = data.spotify;
 
     try {
diff --git a/src/reports/dto/get-top-genres-report.dto.ts b/src/reports/dto/get-top-genres-report.dto.ts
new file mode 100644
index 0000000..3f26839
--- /dev/null
+++ b/src/reports/dto/get-top-genres-report.dto.ts
@@ -0,0 +1,10 @@
+import { ValidateNested } from "class-validator";
+import { User } from "../../users/user.entity";
+import { ReportTimeDto } from "./report-time.dto";
+
+export class GetTopGenresReportDto {
+  user: User;
+
+  @ValidateNested()
+  time: ReportTimeDto;
+}
diff --git a/src/reports/dto/top-genres-report.dto.ts b/src/reports/dto/top-genres-report.dto.ts
new file mode 100644
index 0000000..e7e9825
--- /dev/null
+++ b/src/reports/dto/top-genres-report.dto.ts
@@ -0,0 +1,10 @@
+import { Genre } from "../../music-library/genre.entity";
+import { TopArtistsReportDto } from "./top-artists-report.dto";
+
+export class TopGenresReportDto {
+  items: {
+    genre: Genre;
+    artists: TopArtistsReportDto["items"];
+    count: number;
+  }[];
+}
diff --git a/src/reports/reports.controller.ts b/src/reports/reports.controller.ts
index efa7ca5..c467109 100644
--- a/src/reports/reports.controller.ts
+++ b/src/reports/reports.controller.ts
@@ -6,6 +6,7 @@ import { ListenReportDto } from "./dto/listen-report.dto";
 import { ReportTimeDto } from "./dto/report-time.dto";
 import { TopAlbumsReportDto } from "./dto/top-albums-report.dto";
 import { TopArtistsReportDto } from "./dto/top-artists-report.dto";
+import { TopGenresReportDto } from "./dto/top-genres-report.dto";
 import { TopTracksReportDto } from "./dto/top-tracks-report.dto";
 import { ReportsService } from "./reports.service";
 import { Timeframe } from "./timeframe.enum";
@@ -50,4 +51,13 @@ export class ReportsController {
   ): Promise<TopTracksReportDto> {
     return this.reportsService.getTopTracks({ user, time });
   }
+
+  @Get("top-genres")
+  @AuthAccessToken()
+  async getTopGenres(
+    @Query() time: ReportTimeDto,
+    @ReqUser() user: User
+  ): Promise<TopGenresReportDto> {
+    return this.reportsService.getTopGenres({ user, time });
+  }
 }
diff --git a/src/reports/reports.service.ts b/src/reports/reports.service.ts
index 864aaa7..9905316 100644
--- a/src/reports/reports.service.ts
+++ b/src/reports/reports.service.ts
@@ -15,13 +15,17 @@ import {
   sub,
 } from "date-fns";
 import { ListensService } from "../listens/listens.service";
+import { User } from "../users/user.entity";
 import { GetListenReportDto } from "./dto/get-listen-report.dto";
 import { GetTopAlbumsReportDto } from "./dto/get-top-albums-report.dto";
 import { GetTopArtistsReportDto } from "./dto/get-top-artists-report.dto";
+import { GetTopGenresReportDto } from "./dto/get-top-genres-report.dto";
 import { GetTopTracksReportDto } from "./dto/get-top-tracks-report.dto";
 import { ListenReportDto } from "./dto/listen-report.dto";
+import { ReportTimeDto } from "./dto/report-time.dto";
 import { TopAlbumsReportDto } from "./dto/top-albums-report.dto";
 import { TopArtistsReportDto } from "./dto/top-artists-report.dto";
+import { TopGenresReportDto as TopGenresReportDto } from "./dto/top-genres-report.dto";
 import { TopTracksReportDto } from "./dto/top-tracks-report.dto";
 import { Interval } from "./interval";
 import { Timeframe } from "./timeframe.enum";
@@ -66,16 +70,11 @@ export class ReportsService {
   constructor(private readonly listensService: ListensService) {}
 
   async getListens(options: GetListenReportDto): Promise<ListenReportDto> {
-    const { user, timeFrame, time: timePreset } = options;
+    const { timeFrame, time: timePreset } = options;
+
+    const listens = await this.getListensQueryFromOptions(options).getMany();
 
     const interval = this.getIntervalFromPreset(timePreset);
-
-    const listens = await this.listensService
-      .getScopedQueryBuilder()
-      .byUser(user)
-      .duringInterval(interval)
-      .getMany();
-
     const { eachOfInterval, isSame } = timeframeToDateFns[timeFrame];
 
     const reportItems = eachOfInterval(interval).map((date) => {
@@ -91,14 +90,7 @@ export class ReportsService {
   async getTopArtists(
     options: GetTopArtistsReportDto
   ): Promise<TopArtistsReportDto> {
-    const { user, time: timePreset } = options;
-
-    const interval = this.getIntervalFromPreset(timePreset);
-
-    const getArtistsWithCountQB = this.listensService
-      .getScopedQueryBuilder()
-      .byUser(user)
-      .duringInterval(interval)
+    const getArtistsWithCountQB = this.getListensQueryFromOptions(options)
       .leftJoin("listen.track", "track")
       .leftJoinAndSelect("track.artists", "artists")
       .groupBy("artists.id")
@@ -132,18 +124,8 @@ export class ReportsService {
   async getTopAlbums(
     options: GetTopAlbumsReportDto
   ): Promise<TopAlbumsReportDto> {
-    const { user, time: timePreset } = options;
-
-    const interval = this.getIntervalFromPreset(timePreset);
-
-    const getListensQB = () =>
-      this.listensService
-        .getScopedQueryBuilder()
-        .byUser(user)
-        .duringInterval(interval);
-
     const [rawAlbumsWithCount, rawAlbumDetails] = await Promise.all([
-      getListensQB()
+      this.getListensQueryFromOptions(options)
         .leftJoin("listen.track", "track")
         .leftJoinAndSelect("track.album", "album")
         .groupBy("album.id")
@@ -154,7 +136,7 @@ export class ReportsService {
 
       // Because of the GROUP BY required to calculate the count we can
       // not properly join the album relations in one query
-      getListensQB()
+      this.getListensQueryFromOptions(options)
         .leftJoinAndSelect("listen.track", "track")
         .leftJoinAndSelect("track.album", "album")
         .leftJoinAndSelect("album.artists", "artists")
@@ -181,18 +163,8 @@ export class ReportsService {
   async getTopTracks(
     options: GetTopTracksReportDto
   ): Promise<TopTracksReportDto> {
-    const { user, time: timePreset } = options;
-
-    const interval = this.getIntervalFromPreset(timePreset);
-
-    const getListensQB = () =>
-      this.listensService
-        .getScopedQueryBuilder()
-        .byUser(user)
-        .duringInterval(interval);
-
     const [rawTracksWithCount, rawTrackDetails] = await Promise.all([
-      getListensQB()
+      this.getListensQueryFromOptions(options)
         .leftJoin("listen.track", "track")
         .groupBy("track.id")
         .select("track.*")
@@ -202,7 +174,7 @@ export class ReportsService {
 
       // Because of the GROUP BY required to calculate the count we can
       // not properly join the artist relations in one query
-      getListensQB()
+      this.getListensQueryFromOptions(options)
         .leftJoinAndSelect("listen.track", "track")
         .leftJoinAndSelect("track.artists", "artists")
         .distinctOn(["track.id"])
@@ -225,6 +197,77 @@ export class ReportsService {
     };
   }
 
+  async getTopGenres(
+    options: GetTopGenresReportDto
+  ): Promise<TopGenresReportDto> {
+    const [rawGenresWithCount, rawGenresWithArtistsCount] = await Promise.all([
+      this.getListensQueryFromOptions(options)
+        .leftJoin("listen.track", "track")
+        .leftJoin("track.artists", "artists")
+        .leftJoin("artists.genres", "genres")
+        .groupBy("genres.id")
+        .select("genres.*")
+        .addSelect("count(*) as listens")
+        .orderBy("listens", "DESC")
+        .getRawMany(),
+      this.getListensQueryFromOptions(options)
+        .leftJoin("listen.track", "track")
+        .leftJoin("track.artists", "artists")
+        .leftJoin("artists.genres", "genres")
+        .groupBy("genres.id")
+        .addGroupBy("artists.id")
+        .select("genres.id", "genreID")
+        .addSelect("artists.*")
+        .addSelect("count(*) as listens")
+        .orderBy("listens", "DESC")
+        .getRawMany(),
+    ]);
+
+    const items: TopGenresReportDto["items"] = rawGenresWithCount
+      .filter((rawGenre) => rawGenre.id) // Make sure that listen has related genre
+      .map((data) => ({
+        count: Number.parseInt(data.listens, 10),
+        genre: {
+          id: data.id,
+          name: data.name,
+        },
+        artists: rawGenresWithArtistsCount
+          .filter(({ genreID }) => genreID === data.id)
+          .map((artistsData) => ({
+            count: Number.parseInt(artistsData.listens, 10),
+            artist: {
+              id: artistsData.id,
+              name: artistsData.name,
+              spotify: {
+                id: artistsData.spotifyId,
+                uri: artistsData.spotifyUri,
+                type: artistsData.spotifyType,
+                href: artistsData.spotifyHref,
+              },
+            },
+          }))
+          .filter((_, i) => i < 5),
+      }));
+
+    return {
+      items,
+    };
+  }
+
+  private getListensQueryFromOptions(options: {
+    user: User;
+    time: ReportTimeDto;
+  }) {
+    const { user, time: timePreset } = options;
+
+    const interval = this.getIntervalFromPreset(timePreset);
+
+    return this.listensService
+      .getScopedQueryBuilder()
+      .byUser(user)
+      .duringInterval(interval);
+  }
+
   private getIntervalFromPreset(options: {
     timePreset: TimePreset;
     customTimeStart?: string;
diff --git a/src/sources/spotify/spotify-api/entities/album-object.ts b/src/sources/spotify/spotify-api/entities/album-object.ts
index 019cbdb..da70316 100644
--- a/src/sources/spotify/spotify-api/entities/album-object.ts
+++ b/src/sources/spotify/spotify-api/entities/album-object.ts
@@ -5,13 +5,6 @@ import { SimplifiedArtistObject } from "./simplified-artist-object";
 // tslint:disable: variable-name
 
 export class AlbumObject {
-  /**
-   * A list of the genres used to classify the album.
-   * For example: "Prog Rock" , "Post-Grunge".
-   * (If not yet classified, the array is empty.)
-   */
-  genres: string[];
-
   /**
    * The artists of the album.
    * Each artist object includes a link in href to more detailed information about the artist.
diff --git a/src/sources/spotify/spotify.service.ts b/src/sources/spotify/spotify.service.ts
index de116c4..7aea066 100644
--- a/src/sources/spotify/spotify.service.ts
+++ b/src/sources/spotify/spotify.service.ts
@@ -210,14 +210,9 @@ export class SpotifyService {
       )
     );
 
-    const genres = await Promise.all(
-      spotifyAlbum.genres.map((genreName) => this.importGenre(genreName))
-    );
-
     return this.musicLibraryService.createAlbum({
       name: spotifyAlbum.name,
       artists,
-      genres,
       spotify: {
         id: spotifyAlbum.id,
         uri: spotifyAlbum.uri,