com.gsoc.ijosa.liquidgalaxycontroller.PW.UrlShortenerClient.java Source code

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Here is the source code for com.gsoc.ijosa.liquidgalaxycontroller.PW.UrlShortenerClient.java

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/*
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.gsoc.ijosa.liquidgalaxycontroller.PW;

import android.content.Context;
import android.util.Log;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * This class sends requests to the physical web service to shorten URLs.
 */
class UrlShortenerClient {
    private static final String TAG = "UrlShortenerClient";
    private static final String RESOLVE_SCAN_PATH = "resolve-scan";
    private static final String SHORTEN_URL_PATH = "shorten-url";
    private static final int UNDEFINED_SCORE = -1;
    private static UrlShortenerClient mInstance;
    private RequestQueue mRequestQueue;
    private Context mContext;
    private String mEndpointUrl;

    private UrlShortenerClient(Context context) {
        mContext = context.getApplicationContext();
        mRequestQueue = Volley.newRequestQueue(mContext);
        mEndpointUrl = Utils.PROD_ENDPOINT;
    }

    public static UrlShortenerClient getInstance(Context context) {
        if (mInstance == null) {
            mInstance = new UrlShortenerClient(context);
        }
        return mInstance;
    }

    private String constructUrlStr(final String path) {
        return mEndpointUrl + "/" + path;
    }

    public void shortenUrl(final String longUrl, final ShortenUrlCallback shortenUrlCallback, final String tag) {
        // Create the json payload
        JSONObject jsonObject = new JSONObject();
        try {
            jsonObject.put("longUrl", longUrl);
        } catch (JSONException e) {
            Log.e(TAG, "JSONException: " + e.toString());
            shortenUrlCallback.onError(longUrl);
            return;
        }

        // Create the http request
        JsonObjectRequest request = new JsonObjectRequest(constructUrlStr(SHORTEN_URL_PATH), jsonObject,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject jsonResponse) {
                        String shortUrl;
                        try {
                            shortUrl = jsonResponse.getString("id");
                        } catch (JSONException e) {
                            Log.e(TAG, "JSONException: " + e.toString());
                            shortenUrlCallback.onError(longUrl);
                            return;
                        }
                        shortenUrlCallback.onUrlShortened(shortUrl);
                    }
                }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError volleyError) {
                        Log.i(TAG, "VolleyError: " + volleyError.toString());
                        shortenUrlCallback.onError(longUrl);
                    }
                });
        request.setTag(tag);

        // Send off the request
        mRequestQueue.add(request);
    }

    public void cancelAllRequests(final String tag) {
        mRequestQueue.cancelAll(tag);
    }

    public void setEndpoint(String endpointUrl) {
        mEndpointUrl = endpointUrl;
    }

    public interface ShortenUrlCallback {
        void onUrlShortened(String shortUrl);

        void onError(String longUrl);
    }
}