Merge pull request #2 from randing89/master

Add ability to read/update lyrics

README.md

@@ -20,16 +20,21 @@ Make sure you have `eyeD3` installed.
     // Meta contains a hash with the following properties:
     // artist, title, album, comment
   })
+
+  eyed3.readLyrics('file.mp3', function (err, lyrics) {
+    // lyrics will be returned as a string
+  })
 
   var meta = {
     artist:  "MyArtist",
     title:   "MyTitle",
     album:   "MyAlbum",
-    comment: "MyComment"
+    comment: "MyComment",
+    lyrics:  "MyLyrics"
   }
   eyed3.updateMeta('file.mp3', meta, function (err) {
     // file.mp3 now has updated meta data
-  })
+  })  
 ```
 
 ## Running tests

index.js

@@ -17,7 +17,7 @@ EyeD3.prototype.readMeta = function(file, callback) {
   var args = ['--no-color', '--rfc822', file]
     , p = spawn(this.options.eyed3_path, args)
     , allData = ''
-
+  
   p.stdout.on('data', function (data) {
     allData += data
   })
@@ -41,6 +41,35 @@ EyeD3.prototype.readMeta = function(file, callback) {
   })
 }
 
+/**
+* Reads the lyrics of the given file
+*
+* @param  {String}   file
+* @param  {Function} callback
+*/
+EyeD3.prototype.readLyrics = function(file, callback) {
+  var args = ['--no-color', '--verbose', file]
+    , p = spawn(this.options.eyed3_path, args)
+    , allData = ''
+
+  p.stdout.on('data', function (data) {
+    allData += data
+  })
+
+  p.on('exit', function (exitCode) {
+    if(exitCode !== 0)
+      return callback(new Error('eyeD3 exit code: ' + exitCode))
+
+    var response = '';
+
+    if(match = allData.match(/<.*lyric\/text.*:\s(.*)\s\[Lang:[^\]]*\]\s*\[Desc:[^\]]*\]>/im)) {
+      response = match[1]
+    }
+
+    callback(null, response)
+  })
+}
+
 /**
  * Updates the meta data of the given file
  *
@@ -73,7 +102,8 @@ EyeD3.prototype.buildArgs = function(meta) {
   if(meta.title)   args.push('-t', meta.title)
   if(meta.album)   args.push('-A', meta.album)
   if(meta.comment) args.push('-c', '::' + meta.comment)
-
+  if(meta.lyrics)  args.push('-L', '::' + meta.lyrics)
+
   return args
 }
 

test/eyed3.test.js

@@ -8,7 +8,8 @@ var EyeD3 = require('../index.js')
     artist: 'TestArtist',
     title: 'TestTitle',
     album: 'TestAlbum',
-    comment: 'TestComment'
+    comment: 'TestComment',
+    lyrics: 'TestLyrics'
   }
 
 describe('EyeD3', function () {
@@ -19,7 +20,8 @@ describe('EyeD3', function () {
       '-a', 'TestArtist',
       '-t', 'TestTitle',
       '-A', 'TestAlbum',
-      '-c', '::TestComment'
+      '-c', '::TestComment',
+      '-L', '::TestLyrics'
     ]))
     done()
   })
@@ -33,6 +35,18 @@ describe('EyeD3', function () {
       meta.album.should.equal(testMeta.album)
       meta.comment.should.equal(testMeta.comment)
 
+
+      done()
+    })
+  })
+
+  it('should correctly read the lyrics from an .mp3 file', function (done) {
+    eyed3.readLyrics(testFile, function (err, lyrics) {
+      if (err) throw err
+
+      lyrics.should.equal(testMeta.lyrics)
+
+
       done()
     })
   })
@@ -44,7 +58,8 @@ describe('EyeD3', function () {
       title: testMeta.title + "New",
       artist: testMeta.artist + "New",
       album: testMeta.album + "New",
-      comment: testMeta.comment + "New"
+      comment: testMeta.comment + "New",
+      lyrics: testMeta.lyrics + "New"
     }
 
     eyed3.updateMeta(tmpTestFile, newMeta, function (err) {
@@ -57,8 +72,14 @@ describe('EyeD3', function () {
         meta.title.should.equal(newMeta.title)
         meta.album.should.equal(newMeta.album)
         meta.comment.should.equal(newMeta.comment)
-
-        done()
+
+        eyed3.readLyrics(tmpTestFile, function (err, lyrics) {
+          if (err) throw err
+
+          lyrics.should.equal(newMeta.lyrics)
+
+          done()
+        })
       })
     })
   })