TabHouseCommentFragment.java

package com.xiangyixie.picshouse.fragment;


import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.xiangyixie.picshouse.R;
import com.xiangyixie.picshouse.httpService.PHHttpClient;
import com.xiangyixie.picshouse.httpService.PHImageLoader;
import com.xiangyixie.picshouse.httpService.PHJsonPost;
import com.xiangyixie.picshouse.model.Comment;
import com.xiangyixie.picshouse.model.JsonParser;
import com.xiangyixie.picshouse.model.Post;
import com.xiangyixie.picshouse.util.UserWarning;
import com.xiangyixie.picshouse.view.CommentListViewAdapter;

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

import java.util.ArrayList;

/**
 * Created by xiangyixie on 9/7/15.
 */

public class TabHouseCommentFragment extends Fragment {

    private final static String TAG = "TabHouseCommentFragment";
    private Activity mActivity = null;


    private Post mPost = null;
    private int mCommentIdx = -1;

    private CommentListViewAdapter mAdapter = null;
    private ArrayList<Bitmap> mUserAvatarBitmapArray = null;

    private EditText mInputComment = null;
    private Button mSendCommentBtn = null;



    public TabHouseCommentFragment() {

    }

    public void initialize(Post post, int comment_idx) {
        mPost = post;
        mCommentIdx = comment_idx;
    }


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                      Bundle savedInstanceState) {

        View view =  View.inflate(container.getContext(), R.layout.fragment_comment, null);
        if (mPost != null) {
            //init
            initCommentList(inflater, view);
        } else {
            // In case fragment is created without initialize
            // TODO: read post url from bundle and ajax to get list
        }

        // Input comment
        mInputComment = (EditText)view.findViewById(R.id.commentFrag_edittext_input);
        if (mPost != null && mCommentIdx != -1) {
            Comment comment = mPost.getComments().get(mCommentIdx);
            mInputComment.setHint("Rely to " + comment.getUser().getUserName() + ":");
        }

        // Set keypad 'send' listener
        mInputComment.setOnEditorActionListener(new TextView.OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView textView, int actionId, KeyEvent keyEvent) {
                if (actionId == EditorInfo.IME_ACTION_SEND) {
                    String comment = textView.getText().toString();
                    sendComment(comment);
                    return true;
                }
                return false;
            }
        });

        mSendCommentBtn = (Button)view.findViewById(R.id.commentFrag_button_send);
        mSendCommentBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String comment = mInputComment.getText().toString();
                sendComment(comment);
            }
        });
        return view;
    };


    // if mPost != null
    private void initCommentList(LayoutInflater inflater, View view) {
        // TODO: pass correct avatar array
        mUserAvatarBitmapArray = new ArrayList<>();
        ArrayList<Comment> comment_list = mPost.getComments();
        for(int i=0;i < comment_list.size();++i){
            mUserAvatarBitmapArray.add(null);
        }
        mAdapter = new CommentListViewAdapter(inflater, mPost, mUserAvatarBitmapArray);
        ListView listView = (ListView)view.findViewById(R.id.commentFrag_comment_listView);
        listView.setAdapter(mAdapter);


        for(int i=0;i < comment_list.size();++i){
            Comment comment = comment_list.get(i);
            String url = comment.getUser().getUserAvatarUrl();
            final int pos = i;
            new PHImageLoader(url, new PHImageLoader.OnImageLoadedListener() {
                @Override
                public void onImageLoaded(Bitmap image) {
                    if(image != null){
                        mUserAvatarBitmapArray.set(pos, image);
                        mAdapter.notifyDataSetChanged();
                    }else{
                        //pDialog.dismiss();
                        Toast.makeText(mActivity, "Image does not exist or network error", Toast.LENGTH_SHORT).show();
                    }
                }
            }).load();
        }
    }

    private void sendComment(String comment) {
        Log.d(TAG, "send comment " + comment);
        if (mPost == null) {
            return;
        }

        final PHHttpClient client = PHHttpClient.getInstance(mActivity);

        JSONObject jdata = new JSONObject();

        try {
            jdata.put("post", mPost.getId());
            jdata.put("content", comment);
            if (mCommentIdx != -1) {
                jdata.put("reply_to", mPost.getComments().get(mCommentIdx).getId());
            }
        } catch (JSONException e) {
            JsonParser.onException(e);
        }

        PHJsonPost post = new PHJsonPost("/post/comment/create/", jdata,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        Comment comment = null;

                        try {
                            comment = Comment.parseComment(response.getJSONObject("comment"));
                        } catch (JSONException e) {
                            JsonParser.onException(e);
                        }
                        onCommentSend(comment);
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {

                        onCommentSend(null);
                    }
                });

        client.send(post);
    }

    private void onCommentSend(Comment comment) {
        View view = mActivity.getCurrentFocus();
        //hide keyboard
        if (view != null) {
            InputMethodManager imm = (InputMethodManager) mActivity.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
        }

        if (comment != null) {
            mInputComment.setText("");
            mInputComment.setHint(R.string.frag_comment_edittext_hint);

            // TODO: set current user's avatar
            mUserAvatarBitmapArray.add(null);

            mAdapter.appendComment(comment);
        } else {
            toastWarning("Send comment fail");
        }
    }


    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        mActivity = activity;
    }

    @Override
    public void onDetach() {
        super.onDetach();
    }

    private void toastWarning(String txt) {
        UserWarning.warn(this.getActivity(), txt);
    }
}