implemented proper fetching and matching the source

internal/data/source.go

@@ -1,13 +1,15 @@
 package data
 
 import (
-	"errors"
 	"regexp"
 )
 
 type SourceType struct {
 	Name        string
 	Regex       *regexp.Regexp
+	RegexArtist *regexp.Regexp
+	RegexAlbum  *regexp.Regexp
+	RegexSong   *regexp.Regexp
 }
 
 var SourceTypes = []SourceType{
@@ -24,39 +26,14 @@ func GetSourceType(name string) *SourceType {
 	panic("couldn't find source type for " + name)
 }
 
+type ObjectType string
+
+const SongSource = ObjectType("song")
+const AlbumSource = ObjectType("album")
+const ArtistSource = ObjectType("artist")
+
 type Source struct {
 	Url        string
-	Type *SourceType
-}
-
-func (st *SourceType) NewSource(url string) (Source, error) {
-	var err error = nil
-	if !st.Regex.MatchString(url) {
-		err = errors.New("url " + url + " didn't match source " + st.Name)
-	}
-
-	return Source{
-		Url:  url,
-		Type: st,
-	}, err
-}
-
-func NewSource(url string) (Source, error) {
-	var st *SourceType = nil
-
-	for i, source := range SourceTypes {
-		if source.Regex.MatchString(url) {
-			st = &SourceTypes[i]
-			break
-		}
-	}
-
-	if st == nil {
-		return Source{}, errors.New("couldn't find a source type for the url " + url)
-	}
-
-	return Source{
-		Url:  url,
-		Type: st,
-	}, nil
+	SourceType *SourceType
+	ObjectType ObjectType
 }

internal/plugin/interface.go

@@ -1,6 +1,7 @@
 package plugin
 
 import (
+	"errors"
 	"regexp"
 
 	"gitea.elara.ws/Hazel/music-kraken/internal/data"
@@ -8,14 +9,16 @@ import (
 
 type Plugin interface {
 	Name() string
-	GetRegex() *regexp.Regexp
+	Regex() *regexp.Regexp
+	RegexArtist() *regexp.Regexp
+	RegexAlbum() *regexp.Regexp
+	RegexSong() *regexp.Regexp
 
-	Search(query string) []data.MusicObject
+	Search(query string) ([]data.MusicObject, error)
 
-	Fetch(source data.Source) data.MusicObject
-	FetchSong(source data.Source) data.Song
-	FetchAlbum(source data.Source) data.Album
-	FetchArtist(source data.Source) data.Artist
+	FetchArtist(source data.Source) (data.Artist, error)
+	FetchAlbum(source data.Source) (data.Album, error)
+	FetchSong(source data.Source) (data.Song, error)
 }
 
 var namePlugins = map[string]Plugin{}
@@ -26,33 +29,79 @@ func RegisterPlugin(plugin Plugin) {
 
 	nameSourceType[name] = data.SourceType{
 		Name:        name,
-		Regex: plugin.GetRegex(),
+		Regex:       plugin.Regex(),
+		RegexArtist: plugin.RegexArtist(),
+		RegexAlbum:  plugin.RegexAlbum(),
+		RegexSong:   plugin.RegexSong(),
 	}
 
 	namePlugins[name] = plugin
 }
 
-func compileSource(source data.Source) data.Source {
-	if source.Type != nil {
-		return source
+func compileSourceType(source data.Source) (data.Source, error) {
+	if source.SourceType != nil {
+		return source, nil
 	}
 
 	for _, st := range nameSourceType {
 		if m := st.Regex.FindString(source.Url); m != "" {
 			source.Url = m
-			return source
+			return source, nil
 		}
 	}
-	panic("couldn't find source type for " + source.Url)
+
+	return source, errors.New("couldn't find source type for " + source.Url)
 }
 
-func FetchUrl(url string) data.MusicObject {
-	return FetchSource(data.Source{
-		Url:  string,
-		Type: nil,
-	})
+func compileSource(source data.Source) (data.Source, error) {
+	source, err := compileSourceType(source)
+	if err != nil {
+		return source, err
+	}
+
+	// find what object this source corresponds to
+	sourceType := source.SourceType
+
+	if sourceType.RegexSong.MatchString(source.Url) {
+		source.ObjectType = data.SongSource
+		return source, nil
+	}
+
+	if sourceType.RegexAlbum.MatchString(source.Url) {
+		source.ObjectType = data.AlbumSource
+		return source, nil
+	}
+
+	if sourceType.RegexArtist.MatchString(source.Url) {
+		source.ObjectType = data.ArtistSource
+		return source, nil
+	}
+
+	return source, errors.New("couldn't find corresponding object source on " + sourceType.Name + " for " + source.Url)
 }
 
-func FetchSource(source data.Source) data.MusicObject {
+func Fetch(source data.Source) (data.MusicObject, error) {
+	source, err := compileSource(source)
+	if err != nil {
+		return nil, err
+	}
 
+	plugin, ok := namePlugins[source.SourceType.Name]
+	if !ok {
+		return nil, errors.New("didn't find plugin of the name " + source.SourceType.Name)
+	}
+
+	if source.ObjectType == data.SongSource {
+		return plugin.FetchSong(source)
+	}
+
+	if source.ObjectType == data.AlbumSource {
+		return plugin.FetchAlbum(source)
+	}
+
+	if source.ObjectType == data.ArtistSource {
+		return plugin.FetchArtist(source)
+	}
+
+	return nil, nil
 }

internal/plugin/musify.go

@@ -14,25 +14,33 @@ func (m Musify) Name() string {
 }
 
 func (m Musify) Regex() *regexp.Regexp {
-	return regexp.MustCompile(`(?i)https?://musify\.club/(artist|track|release)/[a-z\-0-9]+`)
+	return regexp.MustCompile(`(?i)https?://musify\.club/(artist|release|track)/[a-z\-0-9]+`)
 }
 
-func (m *Musify) Fetch(source data.Source) data.MusicObject {
+func (m Musify) RegexArtist() *regexp.Regexp {
+	return regexp.MustCompile(`(?i)https?://musify\.club/artist/[a-z\-0-9]+`)
+}
+
+func (m Musify) RegexAlbum() *regexp.Regexp {
+	return regexp.MustCompile(`(?i)https?://musify\.club/release/[a-z\-0-9]+`)
+}
+
+func (m Musify) RegexSong() *regexp.Regexp {
+	return regexp.MustCompile(`(?i)https?://musify\.club/track/[a-z\-0-9]+`)
+}
+
+func (m *Musify) FetchArtist(source data.Source) (data.Artist, error) {
 	panic("unimplemented")
 }
 
-func (m *Musify) FetchAlbum(source data.Source) data.Album {
+func (m *Musify) FetchAlbum(source data.Source) (data.Album, error) {
 	panic("unimplemented")
 }
 
-func (m *Musify) FetchArtist(source data.Source) data.Artist {
+func (m *Musify) FetchSong(source data.Source) (data.Song, error) {
 	panic("unimplemented")
 }
 
-func (m *Musify) FetchSong(source data.Source) data.Song {
-	panic("unimplemented")
-}
-
-func (m *Musify) Search(query string) []data.MusicObject {
+func (m *Musify) Search(query string) ([]data.MusicObject, error) {
 	panic("unimplemented")
 }

main.go

@@ -4,13 +4,9 @@ import (
 	"fmt"
 
 	"gitea.elara.ws/Hazel/music-kraken/internal/data"
-	"gitea.elara.ws/Hazel/music-kraken/internal/plugin"
 )
 
 func main() {
-	plugins := []plugin.Plugin{
-		&plugin.Musify{},
-	}
 	fmt.Println("music kraken")
 	data.GetSourceType("Youtube")
 }