TumblrUtils.java

package me.ccrama.redditslide.Tumblr;

import android.app.Activity;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.AsyncTask;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

import org.jetbrains.annotations.NotNull;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import me.ccrama.redditslide.Constants;
import me.ccrama.redditslide.Reddit;
import me.ccrama.redditslide.util.HttpUtil;
import me.ccrama.redditslide.util.LogUtil;
import okhttp3.OkHttpClient;

/**
 * Created by carlo_000 on 2/1/2016.
 */
public class TumblrUtils {

    public static SharedPreferences tumblrRequests;

    private static String cutEnds(String s) {
        if (s.endsWith("/")) {
            return s.substring(0, s.length() - 1);
        } else {
            return s;
        }
    }

    public static class GetTumblrPostWithCallback
            extends AsyncTask<String, Void, ArrayList<JsonElement>> {

        public String blog, id;
        public Activity baseActivity;

        private OkHttpClient client;
        private Gson         gson;

        public void onError() {

        }

        public GetTumblrPostWithCallback(@NotNull String url, @NotNull Activity baseActivity) {

            this.baseActivity = baseActivity;
            Uri i = Uri.parse(url);

            id = i.getPathSegments().get(1);
            blog = i.getHost().split("\\.")[0];

            client = Reddit.client;
            gson = new Gson();
        }

        public void doWithData(List<Photo> data) {
            if (data == null || data.isEmpty()) {
                onError();
            }
        }

        JsonElement[] target;
        int           count;
        int           done;

        TumblrPost post;

        public void parseJson(JsonElement baseData) {
            try {
                post = new ObjectMapper().readValue(baseData.toString(), TumblrPost.class);
                baseActivity.runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        doWithData(post.getResponse().getPosts().get(0).getPhotos());
                    }
                });
            } catch (IOException e) {
                e.printStackTrace();
                LogUtil.e(e, "parseJson error, baseData [" + baseData + "]");
            }
        }

        @Override
        protected ArrayList<JsonElement> doInBackground(final String... sub) {
            if (baseActivity != null) {
                String apiUrl = "https://api.tumblr.com/v2/blog/"
                        + blog
                        + "/posts?api_key="
                        + Constants.TUMBLR_API_KEY
                        + "&id="
                        + id;
                LogUtil.v(apiUrl);
                if (tumblrRequests.contains(apiUrl) && new JsonParser().parse(
                        tumblrRequests.getString(apiUrl, "")).getAsJsonObject().has("response")) {
                    parseJson(new JsonParser().parse(tumblrRequests.getString(apiUrl, ""))
                            .getAsJsonObject());
                } else {
                    LogUtil.v(apiUrl);
                    final JsonObject result = HttpUtil.getJsonObject(client, gson, apiUrl);
                    if (result != null && result.has("response") && result.get("response").getAsJsonObject().has("posts") && result.get("response").getAsJsonObject().get("posts").getAsJsonArray().get(0).getAsJsonObject().has("photos")) {
                        tumblrRequests.edit().putString(apiUrl, result.toString()).apply();
                        parseJson(result);
                    } else {
                        onError();
                    }
                }
                return null;
            }
            return null;
        }
    }
}