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Move the JSPF playlist code into public module

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Philipp Wolfer 2023-11-24 01:22:45 +01:00
parent 0f5cb49b4c
commit e1c9fb6076
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11 changed files with 367 additions and 56 deletions
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21
pkg/jspf/COPYING Normal file
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The MIT License (MIT)
Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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pkg/jspf/extensions.go Normal file
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/*
Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
package jspf
import "time"
const (
// The identifier for the MusicBrainz / ListenBrainz JSPF playlist extension
MusicBrainzPlaylistExtensionId = "https://musicbrainz.org/doc/jspf#playlist"
// The identifier for the MusicBrainz / ListenBrainz JSPF track extension
MusicBrainzTrackExtensionId = "https://musicbrainz.org/doc/jspf#track"
)
// MusicBrainz / ListenBrainz JSPF track extension
//
// This extension allows storing additional metadata for playlists.
//
// See "https://musicbrainz.org/doc/jspf#playlist"
type MusicBrainzPlaylistExtension struct {
// The ListenBrainz user who created this playlist.
Creator string `json:"added_by,omitempty"`
// Which ListenBrainz user was the playlist generated for? This is for music
// recommendation bots generating playlists for users.
CreatedFor string `json:"created_for,omitempty"`
// Who are the ListenBrainz users who have access to edit this playlist?
Collaborators []string `json:"collaborators,omitempty"`
// This field identifies a playlist, using the identifier syntax,
// from which this playlist was copied from.
CopiedFrom string `json:"copied_from,omitempty"`
// If the source playlist that this playlist has been copied from has been
// deleted, this field will be set to true and the copied_from field will not
// be returned.
CopiedFromDeleted bool `json:"copied_from_deleted,omitempty"`
// Indicates if this playlist is public or private. Must contain the value
// "true" or "false".
Public string `json:"public,omitempty"`
// The timestamp for when this playlist was last modified.
LastModifiedAt time.Time `json:"last_modified_at,omitempty"`
// This dict allows a playlist creator to submit additional track metadata
// that may be used by playlist generation tools. The content of this field
// is defined by the playlist generation tools and is beyond the scope of
// this document.
AdditionalMetadata map[string]any `json:"additional_metadata,omitempty"`
}
// MusicBrainz / ListenBrainz JSPF track extension
//
// This extension allows storing additional metadata for tracks.
//
// See "https://musicbrainz.org/doc/jspf#track"
type MusicBrainzTrackExtension struct {
// The timestamp for when this track was added to the playlist.
AddedAt time.Time `json:"added_at,omitempty"`
// The ListenBrainz user who added this track.
AddedBy string `json:"added_by,omitempty"`
// The MusicBrainz ID URI for the release that contained this track.
ReleaseIdentifier string `json:"release_identifier,omitempty"`
// A list of MusicBrainz Artist URIs that identify the artist that are part
// of the MusicBrainz artist credit id for this track.
ArtistIdentifiers []string `json:"artist_identifiers,omitempty"`
// This dict allows a playlist creator to submit additional track metadata
// that may be used by playlist generation tools. The content of this field
// is defined by the playlist generation tools and is beyond the scope of
// this document.
AdditionalMetadata map[string]any `json:"additional_metadata,omitempty"`
}

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/*
Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
package jspf_test
import (
"bytes"
"fmt"
"log"
"time"
"go.uploadedlobster.com/scotty/pkg/jspf"
)
func ExampleMusicBrainzTrackExtension() {
pl := jspf.JSPF{
Playlist: jspf.Playlist{
Date: time.Date(2023, 11, 24, 07, 47, 50, 0, time.UTC),
Tracks: []jspf.Track{
{
Title: "Oweynagat",
Extension: map[string]any{
jspf.MusicBrainzTrackExtensionId: jspf.MusicBrainzTrackExtension{
AddedAt: time.Date(2023, 11, 24, 07, 47, 50, 0, time.UTC),
AddedBy: "scotty",
},
},
},
},
},
}
buf := bytes.NewBuffer(make([]byte, 0, 10))
err := pl.Write(buf)
if err != nil {
log.Fatal(err)
}
fmt.Print(buf.String())
// Output:
// {
// "playlist": {
// "date": "2023-11-24T07:47:50Z",
// "track": [
// {
// "title": "Oweynagat",
// "extension": {
// "https://musicbrainz.org/doc/jspf#track": {
// "added_at": "2023-11-24T07:47:50Z",
// "added_by": "scotty"
// }
// }
// }
// ]
// }
// }
}

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/*
Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
// Package for reading and writing music playlists in the JSPF format.
//
// JSPF is the JSON representation of XSPF, see https://www.xspf.org/jspf
package jspf
import (
"encoding/json"
"io"
)
// Reads the JSPF playlist in JSON format from the given io.Reader
func (j *JSPF) Read(in io.Reader) error {
bytes, err := io.ReadAll(in)
if err != nil {
return err
}
err = json.Unmarshal(bytes, j)
return err
}
// Writes the JSPF playlist in JSON format to the given io.Writer
func (j *JSPF) Write(out io.Writer) error {
jspfJson, err := json.MarshalIndent(j, "", "\t")
if err != nil {
return err
}
_, err = out.Write(jspfJson)
return err
}

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/*
Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
package jspf_test
import (
"bytes"
"fmt"
"log"
"os"
"time"
"go.uploadedlobster.com/scotty/pkg/jspf"
)
func ExampleJSPF_Read() {
file, err := os.Open("testdata/simple.jspf")
if err != nil {
log.Fatal(err)
}
defer file.Close()
pl := jspf.JSPF{}
err = pl.Read(file)
if err != nil {
log.Fatal(err)
}
fmt.Printf("Playlist '%v' with %v tracks",
pl.Playlist.Title, len(pl.Playlist.Tracks))
// Output: Playlist 'Two Songs From Thriller' with 2 tracks
}
func ExampleJSPF_Write() {
date, _ := time.Parse(time.RFC3339, "2023-11-23T23:56:00Z")
pl := jspf.JSPF{
Playlist: jspf.Playlist{
Title: "The Playlist",
Creator: "Scotty",
Date: date,
Tracks: []jspf.Track{
{
Title: "The Track",
},
},
},
}
buf := bytes.NewBuffer(make([]byte, 0, 10))
err := pl.Write(buf)
if err != nil {
log.Fatal(err)
}
fmt.Print(buf.String())
// Output:
// {
// "playlist": {
// "title": "The Playlist",
// "creator": "Scotty",
// "date": "2023-11-23T23:56:00Z",
// "track": [
// {
// "title": "The Track"
// }
// ]
// }
// }
}

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/*
Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
package jspf
import "time"
// A JSPF playlist
//
// See https://xspf.org/jspf
type JSPF struct {
Playlist Playlist `json:"playlist"`
}
type Playlist struct {
Title string `json:"title,omitempty"`
Creator string `json:"creator,omitempty"`
Annotation string `json:"annotation,omitempty"`
Info string `json:"info,omitempty"`
Location string `json:"location,omitempty"`
Identifier string `json:"identifier,omitempty"`
Image string `json:"image,omitempty"`
Date time.Time `json:"date,omitempty"`
License string `json:"license,omitempty"`
Attribution []Attribution `json:"attribution,omitempty"`
Links []Link `json:"link,omitempty"`
Meta []Meta `json:"meta,omitempty"`
Extension map[string]any `json:"extension,omitempty"`
Tracks []Track `json:"track"`
}
type Track struct {
Location []string `json:"location,omitempty"`
Identifier []string `json:"identifier,omitempty"`
Title string `json:"title,omitempty"`
Creator string `json:"creator,omitempty"`
Annotation string `json:"annotation,omitempty"`
Info string `json:"info,omitempty"`
Album string `json:"album,omitempty"`
TrackNum int `json:"trackNum,omitempty"`
Duration int `json:"duration,omitempty"`
Links []Link `json:"link,omitempty"`
Meta []Meta `json:"meta,omitempty"`
Extension map[string]any `json:"extension,omitempty"`
}
type Attribution map[string]string
type Link map[string]string
type Meta map[string]string

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/*
Copyright © 2023 Philipp Wolfer <phw@uploadedlobster.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
package jspf_test
import (
"encoding/json"
"io"
"os"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.uploadedlobster.com/scotty/pkg/jspf"
)
func TestUnmarshalSimple(t *testing.T) {
data, err := readSampleJson("testdata/simple.jspf")
require.NoError(t, err)
assert := assert.New(t)
playlist := data.Playlist
assert.Equal("Two Songs From Thriller", playlist.Title)
assert.Equal("MJ Fan", playlist.Creator)
require.Len(t, playlist.Tracks, 2)
track1 := playlist.Tracks[0]
require.Len(t, track1.Location, 1)
assert.Equal("http://example.com/billiejean.mp3", track1.Location[0])
assert.Equal("Billie Jean", track1.Title)
assert.Equal("Michael Jackson", track1.Creator)
assert.Equal("Thriller", track1.Album)
}
func TestUnmarshalComprehensive(t *testing.T) {
data, err := readSampleJson("testdata/comprehensive.jspf")
require.NoError(t, err)
assert := assert.New(t)
playlist := data.Playlist
assert.Equal("http://example.com/", playlist.License)
require.Len(t, playlist.Attribution, 2)
assert.Equal("http://example.com/", playlist.Attribution[0]["identifier"])
assert.Equal("http://example.com/", playlist.Attribution[1]["location"])
require.Len(t, playlist.Meta, 2)
assert.Equal("345", playlist.Meta[1]["http://example.com/rel/2/"])
require.Len(t, playlist.Links, 2)
assert.Equal("http://example.com/body/1/", playlist.Links[0]["http://example.com/rel/1/"])
}
func TestUnmarshalListenBrainzPlaylist(t *testing.T) {
data, err := readSampleJson("testdata/lb-playlist.jspf")
require.NoError(t, err)
assert := assert.New(t)
playlist := data.Playlist
assert.Equal(
"https://listenbrainz.org/playlist/96485e27-967a-492a-9d04-c5a819baa2f3",
playlist.Identifier)
expectedPlaylistDate, err := time.Parse(time.RFC3339, "2023-07-04T21:03:52.317148+00:00")
require.NoError(t, err)
assert.Equal(expectedPlaylistDate, playlist.Date)
assert.NotNil(playlist.Extension["https://musicbrainz.org/doc/jspf#playlist"])
require.Len(t, playlist.Tracks, 2)
track1 := playlist.Tracks[0]
assert.Equal(
"https://musicbrainz.org/recording/3f2bdbbd-063e-478c-a394-6da0cb303302",
track1.Identifier[0])
extension := track1.Extension["https://musicbrainz.org/doc/jspf#track"].(map[string]any)
assert.NotNil(extension)
assert.Equal("outsidecontext", extension["added_by"])
}
func readSampleJson(path string) (jspf.JSPF, error) {
var result jspf.JSPF
jsonFile, err := os.Open(path)
if err != nil {
return result, err
}
defer jsonFile.Close()
byteValue, err := io.ReadAll(jsonFile)
if err != nil {
return result, err
}
err = json.Unmarshal(byteValue, &result)
return result, err
}

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{
"playlist": {
"title": "JSPF example",
"creator": "Name of playlist author",
"annotation": "Super playlist",
"info": "http://example.com/",
"location": "http://example.com/",
"identifier": "http://example.com/",
"image": "http://example.com/",
"date": "2005-01-08T17:10:47-05:00",
"license": "http://example.com/",
"attribution": [
{
"identifier": "http://example.com/"
},
{
"location": "http://example.com/"
}
],
"link": [
{
"http://example.com/rel/1/": "http://example.com/body/1/"
},
{
"http://example.com/rel/2/": "http://example.com/body/2/"
}
],
"meta": [
{
"http://example.com/rel/1/": "my meta 14"
},
{
"http://example.com/rel/2/": "345"
}
],
"extension": {
"http://example.com/app/1/": [
"ARBITRARY_EXTENSION_BODY",
{}
],
"http://example.com/app/2/": [
"ARBITRARY_EXTENSION_BODY"
]
},
"track": [
{
"location": [
"http://example.com/1.ogg",
"http://example.com/2.mp3"
],
"identifier": [
"http://example.com/1/",
"http://example.com/2/"
],
"title": "Track title",
"creator": "Artist name",
"annotation": "Some text",
"info": "http://example.com/",
"image": "http://example.com/",
"album": "Album name",
"trackNum": 1,
"duration": 0,
"link": [
{
"http://example.com/rel/1/": "http://example.com/body/1/"
},
{
"http://example.com/rel/2/": "http://example.com/body/2/"
}
],
"meta": [
{
"http://example.com/rel/1/": "my meta 14"
},
{
"http://example.com/rel/2/": "345"
}
],
"extension": {
"http://example.com/app/1/": [
"ARBITRARY_EXTENSION_BODY",
{}
],
"http://example.com/app/2/": [
"ARBITRARY_EXTENSION_BODY"
]
}
}
]
}
}

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{
"playlist": {
"creator": "outsidecontext",
"date": "2023-07-04T21:03:52.317148+00:00",
"extension": {
"https://musicbrainz.org/doc/jspf#playlist": {
"creator": "outsidecontext",
"last_modified_at": "2023-07-10T10:03:48.833282+00:00",
"public": false
}
},
"identifier": "https://listenbrainz.org/playlist/96485e27-967a-492a-9d04-c5a819baa2f3",
"title": "Fundst\u00fccke",
"track": [
{
"creator": "Airghoul feat. Priest",
"extension": {
"https://musicbrainz.org/doc/jspf#track": {
"added_at": "2023-07-04T21:05:59.492439+00:00",
"added_by": "outsidecontext",
"additional_metadata": {
"caa_id": 32981136309,
"caa_release_mbid": "fb7d69d6-0b4b-4f99-a77a-c3a0d786b52c"
},
"artist_identifiers": [
"https://musicbrainz.org/artist/554a5819-6c3f-4734-ae4c-11eabb7ca2e0",
"https://musicbrainz.org/artist/56ff293f-ec9a-4741-9d14-0537c4fb8f97"
]
}
},
"identifier": [
"https://musicbrainz.org/recording/3f2bdbbd-063e-478c-a394-6da0cb303302"
],
"title": "Orange Forest"
},
{
"creator": "Crippled Black Phoenix",
"extension": {
"https://musicbrainz.org/doc/jspf#track": {
"added_at": "2023-07-10T10:03:48.833330+00:00",
"added_by": "outsidecontext",
"additional_metadata": {
"caa_id": 28699084533,
"caa_release_mbid": "92e7cf6c-e626-4409-81b0-0fcb8a0c3699"
},
"artist_identifiers": [
"https://musicbrainz.org/artist/055b6082-b9cc-4688-85c4-8153c0ef2d70"
]
}
},
"identifier": [
"https://musicbrainz.org/recording/14d612f0-4022-4adc-8cef-87a569e2d65c"
],
"title": "Lost"
}
]
}
}

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{
"playlist": {
"title": "Two Songs From Thriller",
"creator": "MJ Fan",
"track": [
{
"location": [
"http://example.com/billiejean.mp3"
],
"title": "Billie Jean",
"creator": "Michael Jackson",
"album": "Thriller"
},
{
"location": [
"http://example.com/thegirlismine.mp3"
],
"title": "The Girl Is Mine",
"creator": "Michael Jackson",
"album": "Thriller"
}
]
}
}