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Expose creating and listing all playlists via the Euterpe API
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| package webserver | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "net/http" | ||
|
|
||
| "github.com/ironsmile/euterpe/src/library" | ||
| "github.com/ironsmile/euterpe/src/playlists" | ||
| ) | ||
|
|
||
| // playlistsHandler will list playlists (GET) and create a new one (POST). | ||
| type playlistsHandler struct { | ||
| playlists playlists.Playlister | ||
| } | ||
|
|
||
| // NewPlaylistsHandler returns an http.Handler which supports listing all playlists | ||
| // with a GET request and creating a new playlist with a POST request. | ||
| func NewPlaylistsHandler(playlister playlists.Playlister) http.Handler { | ||
| return &playlistsHandler{ | ||
| playlists: playlister, | ||
| } | ||
| } | ||
|
|
||
| // ServeHTTP is required by the http.Handler's interface | ||
| func (plh playlistsHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) { | ||
| if req.Method == http.MethodPost { | ||
| plh.create(w, req) | ||
| return | ||
| } | ||
|
|
||
| plh.listAll(w, req) | ||
| } | ||
|
|
||
| func (plh playlistsHandler) create(w http.ResponseWriter, req *http.Request) { | ||
| listReq := playlistRequest{} | ||
| dec := json.NewDecoder(req.Body) | ||
| if err := dec.Decode(&listReq); err != nil { | ||
| http.Error( | ||
| w, | ||
| fmt.Sprintf("Cannot decode playlist JSON: %s", err), | ||
| http.StatusBadRequest, | ||
| ) | ||
| return | ||
| } | ||
|
|
||
| newID, err := plh.playlists.Create(req.Context(), listReq.Name, listReq.AddTrackByID) | ||
| if err != nil { | ||
| http.Error( | ||
| w, | ||
| fmt.Sprintf("Failed to create playlist: %s", err), | ||
| http.StatusInternalServerError, | ||
| ) | ||
| return | ||
| } | ||
|
|
||
| resp := createPlaylistResponse{ | ||
| CreatedPlaylistID: newID, | ||
| } | ||
|
|
||
| enc := json.NewEncoder(w) | ||
| if err := enc.Encode(resp); err != nil { | ||
| http.Error( | ||
| w, | ||
| fmt.Sprintf("Playlist created but cannot write response JSON: %s", err), | ||
| http.StatusInternalServerError, | ||
| ) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| func (plh playlistsHandler) listAll(w http.ResponseWriter, req *http.Request) { | ||
| resp := playlistsResponse{} | ||
| playlists, err := plh.playlists.GetAll(req.Context()) | ||
| if err != nil { | ||
| http.Error( | ||
| w, | ||
| fmt.Sprintf("Getting playlists failed: %s", err), | ||
| http.StatusInternalServerError, | ||
| ) | ||
| return | ||
| } | ||
|
|
||
| for _, pl := range playlists { | ||
| resp.Playlists = append(resp.Playlists, playlist{ | ||
| ID: pl.ID, | ||
| Name: pl.Name, | ||
| Desc: pl.Desc, | ||
| TracksCount: pl.TracksCount, | ||
| Duration: pl.Duration.Milliseconds(), | ||
| CreatedAt: pl.CreatedAt.Unix(), | ||
| UpdatedAt: pl.UpdatedAt.Unix(), | ||
| }) | ||
| } | ||
|
|
||
| enc := json.NewEncoder(w) | ||
| if err := enc.Encode(resp); err != nil { | ||
| http.Error( | ||
| w, | ||
| fmt.Sprintf("Encoding playlists response failed: %s", err), | ||
| http.StatusInternalServerError, | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| type playlistsResponse struct { | ||
| Playlists []playlist `json:"playlists"` | ||
| } | ||
|
|
||
| type createPlaylistResponse struct { | ||
| CreatedPlaylistID int64 `json:"created_playlsit_id"` | ||
| } | ||
|
|
||
| type playlist struct { | ||
| ID int64 `json:"id"` | ||
| Name string `json:"name"` | ||
| Desc string `json:"description,omitempty"` | ||
| TracksCount int64 `json:"tracks_count"` | ||
| Duration int64 `json:"duration"` // Playlist duration in millisecs. | ||
| CreatedAt int64 `json:"created_at"` // Unix timestamp in seconds. | ||
| UpdatedAt int64 `json:"updated_at"` // Unix timestamp in seconds. | ||
| Tracks []library.TrackInfo `json:"tracks,omitempty"` | ||
| } | ||
|
|
||
| type playlistRequest struct { | ||
| Name string `json:"name"` | ||
| Desc string `json:"description"` | ||
| AddTrackByID []int64 `json:"add_tracks_by_id"` | ||
| RemoveIndecies []int64 `json:"remove_indecies"` | ||
| } |
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