新增：封面嵌入、歌词下载；修复Bug

src/main/events/index.js

@@ -1,4 +1,5 @@
 
 require('./request')
-require('./appName')
+// require('./appName')
+require('./musicMeta')
 

src/main/events/musicMeta.js

@@ -0,0 +1,6 @@
+const { mainOn } = require('../../common/icp')
+const { setMeta } = require('../utils/musicMeta')
+
+mainOn('setMusicMeta', (event, { filePath, meta }) => {
+  setMeta(filePath, meta)
+})

src/main/utils/flacMeta.js

@@ -0,0 +1,38 @@
+const fs = require('fs')
+const flac = require('flac-metadata')
+
+module.exports = (filenPath, meta) => {
+  const reader = fs.createReadStream(filenPath)
+  const tempPath = filenPath + '.lxmtemp'
+  const writer = fs.createWriteStream(tempPath)
+  const processor = new flac.Processor()
+  if (meta.APIC) delete meta.APIC
+
+  const comments = []
+  for (const key in meta) {
+    comments.push(`${key.toUpperCase()}=${meta[key]}`)
+  }
+  const vendor = 'lx-music-desktop'
+
+  processor.on('preprocess', function(mdb) {
+    // Remove existing VORBIS_COMMENT block, if any.
+    if (mdb.type === flac.Processor.MDB_TYPE_VORBIS_COMMENT) {
+      mdb.remove()
+    }
+    // Inject new VORBIS_COMMENT block.
+    if (mdb.removed || mdb.isLast) {
+      let mdbVorbis = flac.data.MetaDataBlockVorbisComment.create(mdb.isLast, vendor, comments)
+      this.push(mdbVorbis.publish())
+    }
+  })
+
+  reader.pipe(processor).pipe(writer).on('finish', () => {
+    fs.unlink(filenPath, err => {
+      if (err) return console.log(err.message)
+      fs.rename(tempPath, filenPath, err => {
+        if (err) console.log(err.message)
+      })
+    })
+  })
+}
+

src/main/utils/mp3Meta.js

@@ -0,0 +1,17 @@
+const NodeID3 = require('node-id3')
+const path = require('path')
+const fs = require('fs')
+const request = require('request')
+const extReg = /^(\.(?:jpe?g|png)).*$/
+
+module.exports = (filePath, meta) => {
+  if (!meta.APIC) return NodeID3.write(meta, filePath)
+  let picPath = path.join(path.dirname(filePath), `${meta.title}-${meta.artist}${path.extname(meta.APIC).replace(extReg, '$1')}`)
+  request(meta.APIC).pipe(fs.createWriteStream(picPath)).on('finish', () => {
+    meta.APIC = picPath
+    NodeID3.write(meta, filePath)
+    fs.unlink(picPath, err => {
+      if (err) console.log(err.message)
+    })
+  })
+}

src/main/utils/musicMeta.js

@@ -0,0 +1,14 @@
+const path = require('path')
+const mp3Meta = require('./mp3Meta')
+const flacMeta = require('./flacMeta')
+
+exports.setMeta = (filePath, meta) => {
+  switch (path.extname(filePath)) {
+    case '.mp3':
+      mp3Meta(filePath, meta)
+      break
+    case '.flac':
+      flacMeta(filePath, meta)
+      break
+  }
+}