Misc fixes

@types/Downloader.d.ts

@@ -1,7 +1,17 @@
-export type DownloaderResult = {
-    filePath: string,
+type BaseResult = {
+    existing?: boolean,
     artist: string,
     song: string,
     album: string,
-    ext: string
-};
+    ext: string,
+}
+
+type ExistingResult = {
+    existing: true
+} & BaseResult
+
+type DownloadedResult = {
+    filePath: string
+} & BaseResult
+
+export type DownloaderResult = ExistingResult | DownloadedResult;

src/client/components/MusicLibrary.ts

@@ -11,6 +11,7 @@ import { MusicIndexEntry, MusicQuery } from '../../../@types/MusicPlayer.js';
 import similarity from 'similarity';
 import MusicDownloader from './MusicDownloader.js';
 import MusicPlayerError from '../../errors/MusicPlayerError.js';
+import { DownloaderResult } from '../../../@types/Downloader.js';
 
 const linkReg = /(https?:\/\/(www\.)?)?(?<domain>([a-z0-9-]{1,63}\.)?([a-z0-9-]{1,63})(\.[a-z0-9-]{2,63})(\.[a-z0-9-]{2,63})?)(\/[^()\s]*)?/iu;
 class MusicLibrary implements Initialisable
@@ -55,7 +56,7 @@ class MusicLibrary implements Initialisable
 
     stop (): void | Promise<void>
     {
-        this.saveIndex();
+        this.#saveIndex();
     }
 
     async download (keyword: string)
@@ -69,7 +70,7 @@ class MusicLibrary implements Initialisable
         if (!domain)
             throw new MusicPlayerError('Invalid link');
 
-        let result = null;
+        let result: DownloaderResult | null = null;
         if (domain.includes('spotify.com'))
             result = await this.#downloader.download('spotify', keyword);
         else
@@ -78,6 +79,12 @@ class MusicLibrary implements Initialisable
         if (!result)
             return null;
 
+        if (result.existing)
+        {
+            const entry = this.#index.find((e) => e.title === result!.song);
+            return entry;
+        }
+
         const targetDir = path.join(this.#path, result.artist);
         if (!fs.existsSync(targetDir))
             fs.mkdirSync(targetDir);
@@ -173,7 +180,7 @@ class MusicLibrary implements Initialisable
         const end = Date.now();
         const newFiles = this.#index.size - initialSize;
         this.#logger.info(`Library scan took ${end - start} ms, ${this.#index.size} (${newFiles} new) files indexed`);
-        this.saveIndex();
+        this.#saveIndex();
         return newFiles;
     }
 
@@ -183,6 +190,12 @@ class MusicLibrary implements Initialisable
         if (this.#index.has(fp) && !force)
             return;
 
+        if (force)
+        {
+            this.#currentId = 0;
+            this.#index.clear();
+        }
+
         // Expensive call
         const metadata = await parseFile(fp, { skipCovers: true });
         const { common } = metadata;
@@ -225,7 +238,7 @@ class MusicLibrary implements Initialisable
         this.#logger.info(`Index loaded with ${this.#index.size} entries`);
     }
 
-    saveIndex ()
+    #saveIndex ()
     {
         this.#logger.info('Saving index to file');
         const cachePath = path.join(process.cwd(), 'cache');

src/client/components/commands/Request.ts

@@ -38,7 +38,7 @@ class RequestCommand extends Command
             if (err instanceof MusicPlayerError)
                 return response.edit(`**Error while requesting song:**\n${err.message}`);
             this.logger.error(err as Error);
-            return 'Internal error, this has been logged';
+            return response.edit('Internal error, this has been logged');
         }
     }
 }

src/client/components/downloaders/Spotify.ts

@@ -5,6 +5,7 @@ import { DownloaderResult } from '../../../../@types/Downloader.js';
 import Downloader from '../../../interfaces/Downloader.js';
 import DiscordClient from '../../DiscordClient.js';
 import path from 'node:path';
+import MusicPlayerError from '../../../errors/MusicPlayerError.js';
 
 class SpotifyDownloader extends Downloader
 {
@@ -25,7 +26,7 @@ class SpotifyDownloader extends Downloader
             '--download-real-time true',
             '--md-allgenres true',
             '--skip-previously-downloaded true',
-            '--output "{artist} - {song_name} - {album}.{ext}"',
+            '--output "{artist} --- {song_name} --- {album}.{ext}"',
             '--print-downloads true',
         ];
         if (process.env.CREDENTIAL_PATH)
@@ -48,6 +49,7 @@ class SpotifyDownloader extends Downloader
             });
         });
     }
+
     override download (url: string): Promise<DownloaderResult>
     {
         if (!this.#available)
@@ -57,37 +59,39 @@ class SpotifyDownloader extends Downloader
 
         const match = url.match(/spotify\.com\/track\/(\w+)/u);
         if (!match)
-            throw new Error('Bad URL');
+            throw new MusicPlayerError('The bot will only process track URLs');
 
         const [ , id ] = match;
         if (!id)
             throw new Error('Could not parse ID from url');
         this.logger.debug('Song ID', id);
 
+        const existing = this.#getSongData(id);
+        if (existing)
+        {
+            const { artist, song, ext, album } = existing;
+            return Promise.resolve({
+                existing: true,
+                artist,
+                song,
+                ext,
+                album
+            });
+        }
+
         return new Promise((resolve, reject) =>
         {
             childProcess.exec(`"${this.#executable}" --root-path "${this.downloadDir}" ${this.#options.join(' ')} ${url}`, (error, stdout, stderr) =>
             {
                 if (error)
                     return reject(error);
-                const songIdsPath = path.join(this.downloadDir!, '.song_ids');
-                this.logger.debug('.song_ids path', songIdsPath);
-                if (!fs.existsSync(songIdsPath))
-                    return reject(new Error('Something went wrong with the download'));
 
-                const file = fs.readFileSync(songIdsPath, { encoding: 'utf-8' });
-                // console.log(file);
-                const lines = file.split('\n');
-                const line = lines.find(ln => ln.startsWith(id))?.replace('\r', '');
-                this.logger.debug('Song entry', line ?? 'undefined');
-                if (!line)
+                const data = this.#getSongData(id);
+                if (!data)
                     throw new Error('Failed to find file reference');
 
-                const elements = line.split('\t');
-                const fileName = elements[elements.length - 1];
+                const { fileName, artist, song, album, ext } = data;
                 const filePath = path.join(this.downloadDir!, fileName);
-                const [ name, ext ] = fileName.split('.');
-                const [ artist, song, album ] = name.split('-');
 
                 if (stderr && !stderr.includes('charmap'))
                     this.logger.debug('stderr', stderr);
@@ -105,6 +109,34 @@ class SpotifyDownloader extends Downloader
         });
     }
 
+    #getSongData (id: string)
+    {
+        const songIdsPath = path.join(this.downloadDir!, '.song_ids');
+        if (!fs.existsSync(songIdsPath))
+            throw new Error('Something went wrong with the download');
+
+        const file = fs.readFileSync(songIdsPath, { encoding: 'utf-8' });
+        const lines = file.split('\n');
+        const line = lines.find(ln => ln.startsWith(id))?.replace('\r', '');
+
+        this.logger.debug('Song entry', line ?? 'undefined');
+        if (!line)
+            return null;
+
+        const elements = line.split('\t');
+        const fileName = elements[elements.length - 1];
+        const [ name, ext ] = fileName.split('.');
+        const [ artist, song, album ] = name.split('---');
+
+        return {
+            fileName,
+            artist,
+            song,
+            album,
+            ext
+        };
+    }
+
     override get available (): boolean
     {
         return this.#available;