com.royclarkson.springagram.PhotoAddToGalleryFragment.java Source code

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Here is the source code for com.royclarkson.springagram.PhotoAddToGalleryFragment.java

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/*
 * Copyright 2014 Roy Clarkson
 *
 * 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.royclarkson.springagram;

import android.app.Activity;
import android.app.Fragment;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.Button;

import com.royclarkson.springagram.model.GalleryResource;
import com.royclarkson.springagram.model.ItemResource;

import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.web.client.RestTemplate;

import java.util.List;

/**
 * {@link Fragment} that displays a list of {@link GalleryResource}s to associate with an {@link ItemResource}.
 *
 * @author Roy Clarkson
 */
public class PhotoAddToGalleryFragment extends Fragment
        implements AbsListView.OnItemClickListener, View.OnClickListener {

    private static final String TAG = PhotoAddToGalleryFragment.class.getSimpleName();

    private static final String ARG_PHOTO_GALLERY_URL = "photo_gallery_url";

    private PhotoAddToGalleryFragmentListener photoAddToGalleryFragmentListener;

    private String itemGalleryUrl;

    private String galleryUrl;

    private List<GalleryResource> galleries;

    private AbsListView listView;

    public PhotoAddToGalleryFragment() {
        // Required empty public constructor
    }

    public static PhotoAddToGalleryFragment newInstance(String itemGalleryUrl) {
        PhotoAddToGalleryFragment fragment = new PhotoAddToGalleryFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PHOTO_GALLERY_URL, itemGalleryUrl);
        fragment.setArguments(args);
        return fragment;
    }

    //***************************************
    // Fragment methods
    //***************************************

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            this.itemGalleryUrl = getArguments().getString(ARG_PHOTO_GALLERY_URL);
        }
        this.galleries = this.photoAddToGalleryFragmentListener.getGalleryList();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_photo_add_to_gallery_list, container, false);
        this.listView = (AbsListView) view.findViewById(android.R.id.list);
        this.listView.setOnItemClickListener(this);
        this.listView.setAdapter(new PhotoAddToGalleryListAdapter(getActivity(), this.galleries));
        Button button = (Button) view.findViewById(R.id.button_save);
        button.setOnClickListener(this);
        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setRetainInstance(true);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            this.photoAddToGalleryFragmentListener = (PhotoAddToGalleryFragmentListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement PhotoAddToGalleryFragmentListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        this.photoAddToGalleryFragmentListener = null;
    }

    //***************************************
    // OnItemClickListener methods
    //***************************************

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        if (null != this.photoAddToGalleryFragmentListener) {
            GalleryResource selectedGallery = this.photoAddToGalleryFragmentListener.getGalleryByPosition(position);
            this.galleryUrl = selectedGallery.getLink(GalleryResource.REL_SELF).getHref();
        }
    }

    //***************************************
    // onClickListener methods
    //***************************************

    public void onClick(View view) {
        if (view.getId() == R.id.button_save) {
            new AddToGalleryTask().execute(this.itemGalleryUrl, this.galleryUrl);
        }
    }

    //***************************************
    // Listener Interface
    //***************************************

    public interface PhotoAddToGalleryFragmentListener {

        public List<GalleryResource> getGalleryList();

        public GalleryResource getGalleryByPosition(int position);

        public void onPhotoAddToGalleryComplete();

    }

    //***************************************
    // Private classes
    //***************************************

    private class AddToGalleryTask extends AsyncTask<String, Void, Boolean> {

        @Override
        protected void onPreExecute() {

        }

        @Override
        protected Boolean doInBackground(String... params) {
            try {
                final String url = params[0];
                final String postData = params[1];

                HttpHeaders requestHeaders = new HttpHeaders();
                requestHeaders.setContentType(new MediaType("text", "uri-list"));
                HttpEntity<String> requestEntity = new HttpEntity<String>(postData, requestHeaders);
                RestTemplate restTemplate = new RestTemplate();
                restTemplate.exchange(url, HttpMethod.PUT, requestEntity, Void.class);
                return true;
            } catch (Exception e) {
                Log.e(TAG, e.getMessage(), e);
                return false;
            }
        }

        @Override
        protected void onPostExecute(Boolean success) {
            if (photoAddToGalleryFragmentListener != null) {
                photoAddToGalleryFragmentListener.onPhotoAddToGalleryComplete();
            }
        }

    }

}