read OpenSpotifyAPI responses in UTF-8 (#1)

build.gradle

@@ -4,7 +4,7 @@ plugins {
 }
 
 group 'de.labystudio'
-version '1.1.11'
+version '1.1.12'
 
 compileJava {
     sourceCompatibility = '1.8'

src/main/java/de/labystudio/spotifyapi/open/OpenSpotifyAPI.java

@@ -12,6 +12,7 @@
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
 import java.util.function.Consumer;
@@ -288,7 +289,11 @@ public <T> T request(String url, Class<?> clazz, boolean canGenerateNewAccessTok
         }
 
         // Read response
-        JsonReader reader = new JsonReader(new InputStreamReader(connection.getInputStream()));
+        JsonReader reader = new JsonReader(new InputStreamReader(
+            connection.getInputStream(),
+            StandardCharsets.UTF_8
+        ));
+
         return GSON.fromJson(reader, clazz);
     }
 

src/main/java/de/labystudio/spotifyapi/open/model/track/OpenTrack.java

@@ -1,7 +1,7 @@
-
 package de.labystudio.spotifyapi.open.model.track;
 
 import com.google.gson.annotations.SerializedName;
+import de.labystudio.spotifyapi.model.Track;
 
 import java.util.List;
 
@@ -49,4 +49,47 @@ public class OpenTrack {
 
     public String uri;
 
+    private transient String joinedArtists;
+
+    /**
+     * Joins the artists to a single string.
+     *
+     * @return the artists name, split with comma
+     */
+    public String getArtists() {
+        if (this.joinedArtists == null) {
+            this.joinedArtists = this.getArtists(", ");
+        }
+
+        return this.joinedArtists;
+    }
+
+    /**
+     * Joins the artists to a single string.
+     *
+     * @param delimiter The delimiter to split the artists with
+     * @return the artists name, split the provided delimiter
+     */
+    public String getArtists(String delimiter) {
+        if (this.artists == null || this.artists.isEmpty()) {
+            return null;
+        }
+
+        StringBuilder builder = new StringBuilder();
+        for (Artist artist : this.artists) {
+            builder.append(delimiter);
+            builder.append(artist.name);
+        }
+
+        return builder.substring(delimiter.length());
+    }
+
+    /**
+     * Create a new {@link Track} based on the current object.
+     *
+     * @return The new {@link Track} object
+     */
+    public Track toTrack() {
+        return new Track(this.id, this.name, this.getArtists(), this.durationMs);
+    }
 }