Implement download button

src/components/Album.tsx

@@ -1,9 +1,10 @@
 import { useEffect, useState } from 'react'
 
-import { getCors, getDownloadUrl, getTracks } from 'utils/search'
+import { getDownloadUrl, getTracks, triggerDownload } from 'utils/search'
 import type { AlbumRow, TrackRow } from 'utils/types'
 import Loader from './Loader'
 import ClipboardBtn from './ClipboardBtn'
+import { AlbumDLBtn } from './AlbumDLBtn'
 
 export default function Album(props: { album: AlbumRow; lastReqRef: React.RefObject<number> }) {
   const { album, lastReqRef } = props
@@ -15,7 +16,7 @@ export default function Album(props: { album: AlbumRow; lastReqRef: React.RefObj
         <h3>{album.name}</h3>
         <div className='btn-container'>
           <ClipboardBtn albumUrl={album.url} lastReqRef={lastReqRef} />
-          <button className='download-btn'>Download album</button>
+          <AlbumDLBtn album={album} lastReqRef={lastReqRef} />
         </div>
       </div>
       <TrackList url={album.url} open={open} lastReqRef={lastReqRef} />
@@ -77,10 +78,10 @@ function TrackDownload(props: { track: TrackRow; lastReqRef: React.RefObject<num
   async function fetchUrl() {
     try {
       setLoading(true)
-      const dlUrl = getCors(await getDownloadUrl(track.url, lastReqRef))
+      const dlUrl = await getDownloadUrl(track.url, lastReqRef)
 
       setDownloadUrl(dlUrl)
-      downloadTrack(dlUrl)
+      await downloadTrack(dlUrl)
     } finally {
       setLoading(false)
     }
@@ -92,12 +93,7 @@ function TrackDownload(props: { track: TrackRow; lastReqRef: React.RefObject<num
     const dlBlob = await (await fetch(dlUrl)).blob()
     const fileURL = window.URL.createObjectURL(dlBlob)
 
-    const fileLink = document.createElement('a')
-    fileLink.href = fileURL
-    fileLink.setAttribute('download', track.fileName)
-    document.body.appendChild(fileLink)
-    fileLink.click()
-    fileLink.remove()
+    triggerDownload(fileURL, track.fileName)
   }
 
   return (

src/components/AlbumDLBtn.tsx

@@ -0,0 +1,29 @@
+import { useState } from 'react'
+
+import { downloadAlbum } from 'utils/search'
+import type { AlbumRow } from 'utils/types'
+
+import Loader from './Loader'
+
+export function AlbumDLBtn(props: { album: AlbumRow; lastReqRef: React.RefObject<number> }) {
+  const { album, lastReqRef } = props
+  const [loading, setLoading] = useState(false)
+
+  function handleClick(ev: React.MouseEvent<HTMLButtonElement>) {
+    ev.stopPropagation()
+    setLoading(true)
+    downloadAlbum(album, lastReqRef).finally(() => setLoading(false))
+  }
+
+  return (
+    <button className='download-btn' onClick={handleClick} disabled={loading}>
+      {loading ? (
+        <div className='loader-container'>
+          <Loader show />
+        </div>
+      ) : (
+        <span> Download album</span>
+      )}
+    </button>
+  )
+}

src/utils/search.ts

@@ -102,12 +102,12 @@ export async function getDownloadUrl(trackPageUrl: string, lastReqRef: React.Ref
 
   const flacLinks = audioLinks.filter((link) => link.endsWith('.flac'))
   if (flacLinks.length > 0) {
-    return flacLinks[0]
+    return getCors(flacLinks[0])
   }
 
   const mp3Links = audioLinks.filter((link) => link.endsWith('.mp3'))
   if (mp3Links.length > 0) {
-    return mp3Links[0]
+    return getCors(mp3Links[0])
   }
 
   throw new Error('Failed to fetch download url')
@@ -121,3 +121,27 @@ export async function copyDownloadUrls(albumUrl: string, lastReqRef: React.RefOb
   await navigator.clipboard.writeText(filterUrl.join('\n'))
   toast.success('Copied links to the clipboard!')
 }
+
+export function triggerDownload(url: string, fileName: string) {
+  const fileLink = document.createElement('a')
+  fileLink.href = url
+  fileLink.setAttribute('download', fileName)
+  document.body.appendChild(fileLink)
+  fileLink.click()
+  fileLink.remove()
+}
+
+export async function downloadAlbum(album: AlbumRow, lastReqRef: React.RefObject<number>) {
+  const trackList = await getTracks(album.url, lastReqRef)
+  const newZip = new JSZip()
+
+  const downloadList = await Promise.all(
+    trackList.map(async (t) => ({ ...t, blob: await (await fetch(await getDownloadUrl(t.url, lastReqRef))).blob() }))
+  )
+
+  downloadList.forEach((d) => {
+    newZip.file(d.fileName, d.blob)
+  })
+  const zipBlob = window.URL.createObjectURL(await newZip.generateAsync({ type: 'blob' }))
+  triggerDownload(zipBlob, `${album.name}.zip`)
+}