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386 lines
9 KiB
Go
386 lines
9 KiB
Go
package api
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"git.gammaspectra.live/S.O.N.G/Kirika/audio/queue"
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config2 "git.gammaspectra.live/S.O.N.G/MeteorLight/config"
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queue2 "git.gammaspectra.live/S.O.N.G/MeteorLight/queue"
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"git.gammaspectra.live/S.O.N.G/MeteorLight/queue/track"
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"io"
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"log"
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"net/http"
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"strconv"
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"strings"
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"sync"
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"time"
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)
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type API struct {
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config *config2.Config
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queue *queue2.Queue
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wg sync.WaitGroup
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nr *track.Entry
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}
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func NewAPI(config *config2.Config, queue *queue2.Queue) *API {
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api := &API{
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config: config,
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queue: queue,
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}
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api.listen()
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api.handleQueue()
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return api
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}
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func (a *API) Wait() {
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a.wg.Wait()
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}
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func (a *API) getQueueEntryFromBody(body []byte) (*track.Entry, error) {
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entry := &track.Entry{}
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err := json.Unmarshal(body, &entry.Original)
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if err != nil {
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return nil, err
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}
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err = json.Unmarshal(body, &entry.Metadata)
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if err != nil {
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return nil, err
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}
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var val interface{}
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var strVal string
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var ok bool
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if val, ok = entry.Original["hash"]; ok && a.config.Queue.SongFetchUrl != "" {
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if strVal, ok = val.(string); ok {
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entry.Path = a.config.Queue.SongFetchUrl + strVal
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}
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} else if val, ok = entry.Original["path"]; ok {
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if strVal, ok = val.(string); ok {
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entry.Path = strVal
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}
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}
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if len(entry.Path) > 0 {
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return entry, nil
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}
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return nil, errors.New("could not create queue entry")
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}
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func (a *API) getFallbackTrack() (*track.Entry, error) {
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m := make(map[string]interface{})
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m["path"] = a.config.Queue.FallbackPath
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return &track.Entry{
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Path: a.config.Queue.FallbackPath,
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Original: m,
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}, nil
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}
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func (a *API) getRandomTrack() (*track.Entry, error) {
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response, err := (&http.Client{
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Timeout: time.Second * 60,
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}).Get(a.config.Queue.RandomSongApi)
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if err != nil {
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return nil, err
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}
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defer response.Body.Close()
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body, err := io.ReadAll(response.Body)
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if err != nil {
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return nil, err
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}
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return a.getQueueEntryFromBody(body)
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}
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func (a *API) setNowRandom(nr *track.Entry) {
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a.nr = nr
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if a.config.Queue.NowRandom != "" {
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jsonData, _ := json.Marshal(nr.Original)
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response, err := http.DefaultClient.Post(a.config.Queue.NowRandom, "application/json; charset=utf-8", bytes.NewReader(jsonData))
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if err != nil {
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log.Print(err)
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}
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if response != nil {
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defer response.Body.Close()
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}
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}
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}
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func (a *API) handleQueue() {
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a.wg.Add(1)
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go func() {
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defer a.wg.Done()
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defer close(a.queue.QueueEmpty)
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//TODO: close properly
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for {
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failed := true
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//give three tries for a random track to succeed
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for i := 0; i < 3; i++ {
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if e, err := a.getRandomTrack(); e != nil {
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//preload
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if err = e.Load(); err != nil {
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log.Printf("random track loading error for %s: \"%s\"", e.Path, err)
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continue
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}
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failed = false
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a.setNowRandom(e)
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a.queue.QueueEmpty <- e
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break
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} else {
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log.Printf("random track error: \"%s\"", err)
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}
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}
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if failed {
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if e, err := a.getFallbackTrack(); e != nil {
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//preload
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if err = e.Load(); err != nil {
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log.Printf("fallback track loading error for %s: \"%s\"", e.Path, err)
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continue
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}
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a.setNowRandom(e)
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a.queue.QueueEmpty <- e
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} else {
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log.Printf("fallback track error: \"%s\"", err)
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}
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}
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}
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}()
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a.wg.Add(1)
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go func() {
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defer a.wg.Done()
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for np := range a.queue.NowPlaying {
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jsonData, _ := json.Marshal(np.Original)
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response, err := http.DefaultClient.Post(a.config.Queue.NowPlaying, "application/json; charset=utf-8", bytes.NewReader(jsonData))
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if err != nil {
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log.Print(err)
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}
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if response != nil {
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response.Body.Close()
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}
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}
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}()
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//insert first track
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a.queue.HandleQueue()
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}
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func (a *API) listen() {
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type resultResponse struct {
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Success bool `json:"success"`
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Reason *string `json:"reason"`
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}
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type queueResultResponse struct {
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resultResponse
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QueueId queue.Identifier `json:"queue_id"`
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}
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a.wg.Add(1)
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go func() {
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defer a.wg.Done()
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server := http.Server{
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Addr: fmt.Sprintf("%s:%d", a.config.Api.Host, a.config.Api.Port),
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Handler: http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
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writer.Header().Set("Server", "MeteorLight/api")
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writer.Header().Set("Content-Type", "application/json; charset=utf-8")
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pathSegments := strings.Split(request.URL.Path, "/")
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if len(pathSegments) > 1 {
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switch pathSegments[1] {
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case "listeners":
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if len(pathSegments) > 2 {
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if request.Method != "DELETE" {
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return
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}
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result := resultResponse{
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Success: a.queue.RemoveListener(pathSegments[2]),
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}
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if !result.Success {
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resultErr := fmt.Sprintf("listener %s not found", pathSegments[2])
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result.Reason = &resultErr
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}
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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} else {
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jsonData, _ := json.Marshal(a.queue.GetListeners())
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writer.Write(jsonData)
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}
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return
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case "np":
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if e := a.queue.GetNowPlaying(); e != nil {
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jsonData, _ := json.Marshal(e.Original)
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writer.Write(jsonData)
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} else {
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writer.Write([]byte{'{', '}'})
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}
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return
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case "random":
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if a.nr != nil {
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jsonData, _ := json.Marshal(a.nr.Original)
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writer.Write(jsonData)
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} else {
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writer.Write([]byte{'{', '}'})
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}
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return
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case "queue":
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if len(pathSegments) == 2 {
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if request.Method != "GET" {
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return
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}
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var blobs = make([]map[string]interface{}, 0, 1)
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for _, e := range a.queue.GetQueue() {
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blobs = append(blobs, e.Original)
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}
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jsonData, _ := json.Marshal(blobs)
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writer.Write(jsonData)
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return
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} else {
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switch pathSegments[2] {
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case "head":
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if request.Method == "POST" {
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result := queueResultResponse{}
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if body, err := io.ReadAll(request.Body); err == nil {
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if e, err := a.getQueueEntryFromBody(body); e != nil {
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if err = a.queue.AddTrack(e, false); err == nil {
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result.Success = true
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result.QueueId = e.Identifier
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} else {
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resultErr := err.Error()
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result.Reason = &resultErr
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log.Printf("track addition error for %s: \"%s\"", e.Path, err)
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}
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} else {
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resultErr := err.Error()
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result.Reason = &resultErr
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log.Printf("track addition error: \"%s\"", err)
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}
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}
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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} else if request.Method == "DELETE" {
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result := resultResponse{}
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if head := a.queue.GetHead(); head != nil {
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result.Success = a.queue.Remove(head.Identifier)
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}
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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}
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case "tail":
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if request.Method == "POST" {
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result := queueResultResponse{}
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if body, err := io.ReadAll(request.Body); err == nil {
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if e, err := a.getQueueEntryFromBody(body); e != nil {
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if err = a.queue.AddTrack(e, true); err == nil {
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result.Success = true
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result.QueueId = e.Identifier
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} else {
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resultErr := err.Error()
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result.Reason = &resultErr
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log.Printf("track addition error for %s: \"%s\"", e.Path, err)
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}
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} else {
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resultErr := err.Error()
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result.Reason = &resultErr
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log.Printf("track addition error: \"%s\"", err)
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}
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}
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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} else if request.Method == "DELETE" {
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result := resultResponse{}
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if head := a.queue.GetTail(); head != nil {
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result.Success = a.queue.Remove(head.Identifier)
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}
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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}
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case "clear":
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if request.Method != "POST" {
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return
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}
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result := resultResponse{}
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for _, e := range a.queue.GetQueue() {
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a.queue.Remove(e.Identifier)
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}
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result.Success = true
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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default:
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if request.Method != "POST" {
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return
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}
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if i, err := strconv.ParseInt(pathSegments[2], 10, 0); err == nil {
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result := resultResponse{}
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result.Success = a.queue.Remove(queue.Identifier(i))
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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}
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}
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}
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case "skip":
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if request.Method != "POST" {
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return
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}
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result := resultResponse{}
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result.Success = a.queue.SkipNowPlaying()
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jsonData, _ := json.Marshal(result)
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writer.Write(jsonData)
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return
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}
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}
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writer.WriteHeader(http.StatusNotFound)
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writer.Write([]byte{'{', '}'})
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}),
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}
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if err := server.ListenAndServe(); err != nil {
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log.Panic(err)
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}
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}()
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}
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