Restructure

src-electron/ipc/browse/AlbumArtHandler.ipc.ts

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+import { AlbumArtResult } from '../../shared/interfaces/songDetails.interface'
+import { IPCInvokeHandler } from '../../shared/IPCHandler'
+import { serverURL } from '../../shared/Paths'
+
+/**
+ * Handles the 'album-art' event.
+ */
+class AlbumArtHandler implements IPCInvokeHandler<'album-art'> {
+	event = 'album-art' as const
+
+	/**
+	 * @returns an `AlbumArtResult` object containing the album art for the song with `songID`.
+	 */
+	async handler(songID: number): Promise<AlbumArtResult> {
+		const response = await fetch(`https://${serverURL}/api/data/album-art/${songID}`)
+		return await response.json()
+	}
+}
+
+export const albumArtHandler = new AlbumArtHandler()

src-electron/ipc/browse/BatchSongDetailsHandler.ipc.ts

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+import { VersionResult } from '../../shared/interfaces/songDetails.interface'
+import { IPCInvokeHandler } from '../../shared/IPCHandler'
+import { serverURL } from '../../shared/Paths'
+
+/**
+ * Handles the 'batch-song-details' event.
+ */
+class BatchSongDetailsHandler implements IPCInvokeHandler<'batch-song-details'> {
+	event = 'batch-song-details' as const
+
+	/**
+	 * @returns an array of all the chart versions with a songID found in `songIDs`.
+	 */
+	async handler(songIDs: number[]): Promise<VersionResult[]> {
+		const response = await fetch(`https://${serverURL}/api/data/song-versions/${songIDs.join(',')}`)
+		return await response.json()
+	}
+}
+
+export const batchSongDetailsHandler = new BatchSongDetailsHandler()

src-electron/ipc/browse/SearchHandler.ipc.ts

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+import { SongResult, SongSearch } from '../../shared/interfaces/search.interface'
+import { IPCInvokeHandler } from '../../shared/IPCHandler'
+import { serverURL } from '../../shared/Paths'
+
+/**
+ * Handles the 'song-search' event.
+ */
+class SearchHandler implements IPCInvokeHandler<'song-search'> {
+	event = 'song-search' as const
+
+	/**
+	 * @returns the top 50 songs that match `search`.
+	 */
+	async handler(search: SongSearch): Promise<SongResult[]> {
+		const response = await fetch(`https://${serverURL}/api/search`, {
+			method: 'POST',
+			headers: {
+				// eslint-disable-next-line @typescript-eslint/naming-convention
+				'Content-Type': 'application/json',
+			},
+			body: JSON.stringify(search),
+		})
+
+		return await response.json()
+	}
+}
+
+export const searchHandler = new SearchHandler()

src-electron/ipc/browse/SongDetailsHandler.ipc.ts

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+import { VersionResult } from '../../shared/interfaces/songDetails.interface'
+import { IPCInvokeHandler } from '../../shared/IPCHandler'
+import { serverURL } from '../../shared/Paths'
+
+/**
+ * Handles the 'song-details' event.
+ */
+class SongDetailsHandler implements IPCInvokeHandler<'song-details'> {
+	event = 'song-details' as const
+
+	/**
+	 * @returns the chart versions with `songID`.
+	 */
+	async handler(songID: number): Promise<VersionResult[]> {
+		const response = await fetch(`https://${serverURL}/api/data/song-versions/${songID}`)
+		return await response.json()
+	}
+}
+
+export const songDetailsHandler = new SongDetailsHandler()