feat: add song link conversion

lib/songlink.go

@@ -0,0 +1,58 @@
+package lib
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+)
+
+const (
+	SONGLINK_API_BASE_URL    = "https://api.song.link/v1-alpha.1/links?url="
+	RATE_LIMITED_RETURN_CODE = 429
+)
+
+type SongLinkResponse struct {
+	EntityUniqueId  string          `json:"entityUniqueId"`
+	UserCountry     string          `json:"userCountry"`
+	PageUrl         string          `json:"pageUrl"`
+	LinksByPlatform LinksByPlatform `json:"linksByPlatform"`
+}
+
+type LinksByPlatform struct {
+	Deezer LinkByPlatform `json:"deezer"`
+	Tidal  LinkByPlatform `json:"tidal"`
+}
+
+type LinkByPlatform struct {
+	Country        string `json:"country"`
+	Url            string `json:"url"`
+	EntityUniqueId string `json:"entityUniqueId"`
+}
+
+func (app *App) ConvertSongUrl(url string) (SongLinkResponse, error) {
+	var result SongLinkResponse
+
+	rawResponse, err := http.Get(SONGLINK_API_BASE_URL + url)
+	if err != nil {
+		return result, err
+	}
+
+	if rawResponse.StatusCode == RATE_LIMITED_RETURN_CODE {
+		return result, errors.New("You have been rate limited by song.link, try again later.")
+	}
+
+	defer rawResponse.Body.Close()
+
+	response, err := io.ReadAll(rawResponse.Body)
+	if err != nil {
+		return result, err
+	}
+
+	err = json.Unmarshal(response, &result)
+	if err != nil {
+		return result, err
+	}
+
+	return result, nil
+}