Adding getPlaylist feature (based on searchForSong)

src/SpotifyArduino.cpp

@@ -1025,6 +1025,89 @@ int SpotifyArduino::searchForSong(String query, int limit, processSearch searchC
     return statusCode;
 }
 
+int SpotifyArduino::getPlaylist(String query, int limit, String market, processPlaylist playlistCallback, PlaylistResult results[])
+{
+
+#ifdef SPOTIFY_DEBUG
+    Serial.println(SPOTIFY_PLAYLIST_ENDPOINT);
+    printStack();
+#endif
+
+    // Get from https://arduinojson.org/v6/assistant/
+    const size_t bufferSize = playlistDetailsBufferSize;
+    if (autoTokenRefresh)
+    {
+        checkAndRefreshAccessToken();
+    }
+
+    int statusCode = makeGetRequest((SPOTIFY_PLAYLIST_ENDPOINT + query + "?market=" + market + "&fields=tracks.items%28track%28name%2Curi%2Calbum%28name%2Curi%29%2Cartists%28name%2Curi%29%29").c_str(), _bearerToken);
+#ifdef SPOTIFY_DEBUG
+    Serial.print("Status Code: ");
+    Serial.println(statusCode);
+#endif
+    if (statusCode > 0)
+    {
+        skipHeaders();
+    }
+
+    if (statusCode == 200)
+    {
+
+        // Allocate DynamicJsonDocument
+        DynamicJsonDocument doc(bufferSize);
+
+        // Parse JSON object
+#ifndef SPOTIFY_PRINT_JSON_PARSE
+        DeserializationError error = deserializeJson(doc, *client);
+#else
+        ReadLoggingStream loggingStream(*client, Serial);
+        DeserializationError error = deserializeJson(doc, loggingStream);
+#endif
+	//serializeJsonPretty(doc, Serial);
+        if (!error)
+        {
+
+            uint8_t totalResults = doc["tracks"]["items"].size();
+
+            Serial.print("Total Results: ");
+            Serial.println(totalResults);
+
+            PlaylistResult playlistResult;
+            for (int i = 0; i < totalResults; i++)
+            {
+                //Polling track information
+                JsonObject result = doc["tracks"]["items"][i]["track"];
+                playlistResult.trackUri = result["uri"].as<const char *>();
+                playlistResult.trackName = result["name"].as<const char *>();
+                playlistResult.albumUri = result["album"]["uri"].as<const char *>();
+                playlistResult.albumName = result["album"]["name"].as<const char *>();
+
+		playlistResult.artistName = result["artists"][0]["name"];
+		playlistResult.artistUri = result["artists"][0]["uri"];
+
+                results[i] = playlistResult;
+
+                if (i >= limit-1 || !playlistCallback(playlistResult, i, totalResults))
+                {
+                    //Break at the limit or when indicated
+                    break;
+                }
+            }
+        }
+        else
+        {
+#ifdef SPOTIFY_SERIAL_OUTPUT
+            Serial.print(F("deserializeJson() failed with code "));
+            Serial.println(error.c_str());
+#endif
+            statusCode = -1;
+        }
+    }
+
+    closeClient();
+    return statusCode;
+}
+
 int SpotifyArduino::commonGetImage(char *imageUrl)
 {
 #ifdef SPOTIFY_DEBUG

src/SpotifyArduino.h

@@ -78,11 +78,13 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
 #define SPOTIFY_SEEK_ENDPOINT "/v1/me/player/seek"
 
+#define SPOTIFY_PLAYLIST_ENDPOINT "/v1/playlists/"
+
 #define SPOTIFY_TOKEN_ENDPOINT "/api/token"
 
 #define SPOTIFY_NUM_ALBUM_IMAGES 3 // Max spotify returns is 3, but the third one is probably too big for an ESP
 
-#define SPOTIFY_MAX_NUM_ARTISTS 5
+#define SPOTIFY_MAX_NUM_ARTISTS 5 
 
 #define SPOTIFY_ACCESS_TOKEN_LENGTH 309
 
@@ -146,6 +148,16 @@ struct SearchResult
   int numImages;
 };
 
+struct PlaylistResult
+{
+  const char *albumName;
+  const char *albumUri;
+  const char *trackName;
+  const char *trackUri;
+  const char *artistName;
+  const char *artistUri;
+};
+
 struct CurrentlyPlaying
 {
   SpotifyArtist artists[SPOTIFY_MAX_NUM_ARTISTS];
@@ -167,6 +179,8 @@ typedef void (*processCurrentlyPlaying)(CurrentlyPlaying currentlyPlaying);
 typedef void (*processPlayerDetails)(PlayerDetails playerDetails);
 typedef bool (*processDevices)(SpotifyDevice device, int index, int numDevices);
 typedef bool (*processSearch)(SearchResult result, int index, int numResults);
+typedef bool (*processPlaylist)(PlaylistResult result, int index, int numResults);
+
 
 class SpotifyArduino
 {
@@ -207,6 +221,9 @@ class SpotifyArduino
   //Search
   int searchForSong(String query, int limit, processSearch searchCallback, SearchResult results[]);
 
+  //Playlist
+  int getPlaylist(String query, int limit, String market, processPlaylist playlistCallback, PlaylistResult results[]);
+
   // Image methods
   bool getImage(char *imageUrl, Stream *file);
   bool getImage(char *imageUrl, uint8_t **image, int *imageLength);
@@ -216,6 +233,7 @@ class SpotifyArduino
   int playerDetailsBufferSize = 2000;
   int getDevicesBufferSize = 3000;
   int searchDetailsBufferSize = 3000;
+  int playlistDetailsBufferSize = 3000;
   bool autoTokenRefresh = true;
   Client *client;
   void lateInit(const char *clientId, const char *clientSecret, const char *refreshToken = "");