implement bookmarks list!!

mastodon/src/main/java/org/joinmastodon/android/api/requests/accounts/GetBookmarks.java

@@ -0,0 +1,52 @@
+package org.joinmastodon.android.api.requests.accounts;
+
+import androidx.annotation.NonNull;
+
+import com.google.gson.reflect.TypeToken;
+
+import org.joinmastodon.android.api.MastodonAPIRequest;
+import org.joinmastodon.android.model.Status;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+
+import okhttp3.Response;
+
+public class GetBookmarks extends MastodonAPIRequest<List<Status>>{
+	private String maxId;
+
+	public GetBookmarks(String maxID, String minID, int limit){
+		super(HttpMethod.GET, "/bookmarks", new TypeToken<>(){});
+		if(maxID!=null)
+			addQueryParameter("max_id", maxID);
+		if(minID!=null)
+			addQueryParameter("min_id", minID);
+		if(limit>0)
+			addQueryParameter("limit", ""+limit);
+	}
+
+	@Override
+	public void validateAndPostprocessResponse(List<Status> respObj, Response httpResponse) throws IOException {
+		super.validateAndPostprocessResponse(respObj, httpResponse);
+		// <https://mastodon.social/api/v1/bookmarks?max_id=268962>; rel="next",
+		// <https://mastodon.social/api/v1/bookmarks?min_id=268981>; rel="prev"
+		String link=httpResponse.header("link");
+		// parsing link header by hand; using a library would be cleaner
+		// (also, the functionality should be part of the max id logics and implemented in MastodonAPIRequest)
+		if(link==null) return;
+		String maxIdEq="max_id=";
+		for(String s : link.split(",")) {
+			if(s.contains("rel=\"next\"")) {
+				int start=s.indexOf(maxIdEq)+maxIdEq.length();
+				int end=s.indexOf('>');
+				if(start<0 || start>end) return;
+				this.maxId=s.substring(start, end);
+			}
+		}
+	}
+
+	public String getMaxId() {
+		return maxId;
+	}
+}