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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package playlists | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "path/filepath" | ||
| "testing" | ||
| ) | ||
|
|
||
| func TestParsePLSFormat(t *testing.T) { | ||
| var wantUrls = []struct { | ||
| url string | ||
| title string | ||
| }{ | ||
| {"https://ice4.somafm.com/indiepop-64-aac", "SomaFM: Indie Pop Rocks! (#1): New and classic favorite indie pop tracks."}, | ||
| {"https://ice2.somafm.com/indiepop-64-aac", "SomaFM: Indie Pop Rocks! (#2): New and classic favorite indie pop tracks."}, | ||
| {"https://ice1.somafm.com/indiepop-64-aac", "SomaFM: Indie Pop Rocks! (#3): New and classic favorite indie pop tracks."}, | ||
| {"https://ice6.somafm.com/indiepop-64-aac", "SomaFM: Indie Pop Rocks! (#4): New and classic favorite indie pop tracks."}, | ||
| {"https://ice5.somafm.com/indiepop-64-aac", "SomaFM: Indie Pop Rocks! (#5): New and classic favorite indie pop tracks."}, | ||
| } | ||
| var path string | ||
| if abs, err := filepath.Abs(filepath.Join("testdata", "indiepop64.pls")); err != nil { | ||
| t.Fatal(err) | ||
| } else { | ||
| path = fmt.Sprintf("file://%v", abs) | ||
| } | ||
| it, err := newPLSIterator(path) | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| for i, want := range wantUrls { | ||
| if !it.HasNext() { | ||
| t.Fatal("iterator exhausted") | ||
| } | ||
| url, title := it.Next() | ||
| if url != want.url { | ||
| t.Fatalf("test %d, have url %v want %v", i, url, want.url) | ||
| } | ||
| if title != want.title { | ||
| t.Fatalf("test %d, have title %v want %v", i, title, want.title) | ||
| } | ||
| } | ||
| if it.HasNext() { | ||
| t.Fatal("expected exhausted iterator") | ||
| } | ||
| } | ||
|
|
||
| func TestParseM3UFormat(t *testing.T) { | ||
| var wantUrls = []struct { | ||
| url string | ||
| title string | ||
| }{ | ||
| {"http://ice1.somafm.com/indiepop-128-aac", ""}, | ||
| {"http://ice4.somafm.com/indiepop-128-aac", ""}, | ||
| {"http://ice2.somafm.com/indiepop-128-aac", ""}, | ||
| {"http://ice6.somafm.com/indiepop-128-aac", ""}, | ||
| {"http://ice5.somafm.com/indiepop-128-aac", ""}, | ||
| } | ||
| var path string | ||
| if abs, err := filepath.Abs(filepath.Join("testdata", "indiepop130.m3u")); err != nil { | ||
| t.Fatal(err) | ||
| } else { | ||
| path = fmt.Sprintf("file://%v", abs) | ||
| } | ||
| it, err := newM3UIterator(path) | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| for i, want := range wantUrls { | ||
| if !it.HasNext() { | ||
| t.Fatal("iterator exhausted") | ||
| } | ||
| url, title := it.Next() | ||
| if url != want.url { | ||
| t.Fatalf("test %d, have url %v want %v", i, url, want.url) | ||
| } | ||
| if title != want.title { | ||
| t.Fatalf("test %d, have title %v want %v", i, title, want.title) | ||
| } | ||
| } | ||
| if it.HasNext() { | ||
| t.Fatal("expected exhausted iterator") | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| package playlists | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "gopkg.in/ini.v1" | ||
| "path/filepath" | ||
| "strings" | ||
| ) | ||
|
|
||
| type Iterator interface { | ||
| HasNext() bool | ||
| Next() (file, title string) | ||
| } | ||
|
|
||
| func IsPlaylist(path string) bool { | ||
| ext := strings.ToLower(filepath.Ext(path)) | ||
| return ext == ".m3u" || ext == ".pls" | ||
| } | ||
|
|
||
| // NewPlaylistIterator creates an iterator for the given playlist. | ||
| func NewIterator(uri string) (Iterator, error) { | ||
| ext := strings.ToLower(filepath.Ext(uri)) | ||
| switch ext { | ||
| case ".pls": | ||
| return newPLSIterator(uri) | ||
| case ".m3u": | ||
| return newM3UIterator(uri) | ||
| } | ||
| return nil, fmt.Errorf("'%v' is not a recognized playlist format", ext) | ||
| } | ||
|
|
||
| // plsIterator is an iterator for playlist-files. | ||
| // According to https://en.wikipedia.org/wiki/PLS_(file_format), | ||
| // The format is case-sensitive and essentially that of an INI file. | ||
| // It has entries on the form File1, Title1 etc. | ||
| type plsIterator struct { | ||
| count int | ||
| playlist *ini.Section | ||
| } | ||
|
|
||
| func newPLSIterator(uri string) (*plsIterator, error) { | ||
| content, err := FetchResource(uri) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to read file %v: %w", uri, err) | ||
| } | ||
| pls, err := ini.LoadSources(ini.LoadOptions{IgnoreInlineComment: true}, content) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to parse file %v: %w", uri, err) | ||
| } | ||
| section, err := pls.GetSection("playlist") | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to find playlist in .pls-file %v", uri) | ||
| } | ||
| return &plsIterator{ | ||
| playlist: section, | ||
| }, nil | ||
| } | ||
|
|
||
| func (it *plsIterator) HasNext() bool { | ||
| return it.playlist.HasKey(fmt.Sprintf("File%d", it.count+1)) | ||
| } | ||
|
|
||
| func (it *plsIterator) Next() (file, title string) { | ||
| if val := it.playlist.Key(fmt.Sprintf("File%d", it.count+1)); val != nil { | ||
| file = val.Value() | ||
| } | ||
| if val := it.playlist.Key(fmt.Sprintf("Title%d", it.count+1)); val != nil { | ||
| title = val.Value() | ||
| } | ||
| it.count = it.count + 1 | ||
| return file, title | ||
| } | ||
|
|
||
| // m3uIterator is an iterator for m3u-files. | ||
| // https://docs.fileformat.com/audio/m3u/: | ||
| // | ||
| // There is no official specification for the M3U file format, it is a de-facto standard. | ||
| // M3U is a plain text file that uses the .m3u extension if the text is encoded | ||
| // in the local system’s default non-Unicode encoding or with the .m3u8 extension | ||
| // if the text is UTF-8 encoded. Each entry in the M3U file can be one of the following: | ||
| // | ||
| // - Absolute path to the file | ||
| // - File path relative to the M3U file. | ||
| // - URL | ||
| // | ||
| // In the extended M3U, additional directives are introduced that begin | ||
| // with “#” and end with a colon(:) if they have parameters | ||
| type m3uIterator struct { | ||
| index int | ||
| lines []string | ||
| } | ||
|
|
||
| func newM3UIterator(uri string) (*m3uIterator, error) { | ||
| content, err := FetchResource(uri) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to read file %v: %w", uri, err) | ||
| } | ||
| var lines []string | ||
| // convert windows linebreaks, and split | ||
| for _, l := range strings.Split(strings.ReplaceAll(string(content), "\r\n", "\n"), "\n") { | ||
| // This is a very simple m3u decoder, ignores all extended info | ||
| l = strings.TrimSpace(l) | ||
| if len(l) > 0 && !strings.HasPrefix(l, "#") { | ||
| lines = append(lines, l) | ||
| } | ||
| } | ||
| return &m3uIterator{ | ||
| index: 0, | ||
| lines: lines, | ||
| }, nil | ||
| } | ||
|
|
||
| func (it *m3uIterator) HasNext() bool { | ||
| return it.index < len(it.lines) | ||
| } | ||
|
|
||
| func (it *m3uIterator) Next() (file, title string) { | ||
| file = it.lines[it.index] | ||
| title = "" // Todo? | ||
| it.index++ | ||
| return file, title | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| #EXTM3U | ||
| #EXTINF:-1,SomaFM - Indie Pop Rocks! | ||
| http://ice1.somafm.com/indiepop-128-aac | ||
| #EXTINF:-1,SomaFM - Indie Pop Rocks! | ||
| http://ice4.somafm.com/indiepop-128-aac | ||
| #EXTINF:-1,SomaFM - Indie Pop Rocks! | ||
| http://ice2.somafm.com/indiepop-128-aac | ||
| #EXTINF:-1,SomaFM - Indie Pop Rocks! | ||
| http://ice6.somafm.com/indiepop-128-aac | ||
| #EXTINF:-1,SomaFM - Indie Pop Rocks! | ||
| http://ice5.somafm.com/indiepop-128-aac | ||
|
|
||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| [playlist] | ||
| numberofentries=5 | ||
| File1=https://ice4.somafm.com/indiepop-64-aac | ||
| Title1=SomaFM: Indie Pop Rocks! (#1): New and classic favorite indie pop tracks. | ||
| Length1=-1 | ||
| File2=https://ice2.somafm.com/indiepop-64-aac | ||
| Title2=SomaFM: Indie Pop Rocks! (#2): New and classic favorite indie pop tracks. | ||
| Length2=-1 | ||
| File3=https://ice1.somafm.com/indiepop-64-aac | ||
| Title3=SomaFM: Indie Pop Rocks! (#3): New and classic favorite indie pop tracks. | ||
| Length3=-1 | ||
| File4=https://ice6.somafm.com/indiepop-64-aac | ||
| Title4=SomaFM: Indie Pop Rocks! (#4): New and classic favorite indie pop tracks. | ||
| Length4=-1 | ||
| File5=https://ice5.somafm.com/indiepop-64-aac | ||
| Title5=SomaFM: Indie Pop Rocks! (#5): New and classic favorite indie pop tracks. | ||
| Length5=-1 | ||
| Version=2 | ||
|
|
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