WriteServiceHelper.java

/*
    Copyright (C) 2014 Prasanna Thirumalai
    
    This file is part of StackX.

    StackX is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    StackX is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with StackX.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.prasanna.android.stacknetwork.service;

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;

import com.prasanna.android.http.ClientException;
import com.prasanna.android.http.HttpContentTypes;
import com.prasanna.android.http.HttpHeaderParams;
import com.prasanna.android.stacknetwork.model.Comment;
import com.prasanna.android.stacknetwork.utils.JSONObjectWrapper;
import com.prasanna.android.stacknetwork.utils.JsonFields;
import com.prasanna.android.stacknetwork.utils.StackUri;
import com.prasanna.android.stacknetwork.utils.StackUri.QueryParamDefaultValues;
import com.prasanna.android.utils.LogWrapper;

public class WriteServiceHelper extends AbstractBaseServiceHelper {
  private static final String TAG = WriteServiceHelper.class.getSimpleName();

  private static final WriteServiceHelper INSTANCE = new WriteServiceHelper();

  protected WriteServiceHelper() {
  }

  public static WriteServiceHelper getInstance() {
    return INSTANCE;
  }

  @Override
  protected String getLogTag() {
    return TAG;
  }

  public Comment addComment(long postId, String body) {
    return writeComment("/posts/" + postId + "/comments/add", body);
  }

  public Comment editComment(long commentId, String editedText) {
    return writeComment("/comments/" + commentId + "/edit", editedText);
  }

  private Comment writeComment(String restEndPoint, String body) {
    List<BasicNameValuePair> parameters = getBasicNameValuePartListForPost();
    parameters.add(new BasicNameValuePair(StackUri.QueryParams.FILTER, QueryParamDefaultValues.ITEM_DETAIL_FILTER));
    parameters.add(new BasicNameValuePair(StackUri.QueryParams.BODY, body));

    Map<String, String> requestHeaders = new HashMap<String, String>();
    requestHeaders.put(HttpHeaderParams.CONTENT_TYPE, HttpContentTypes.APPLICATION_FROM_URL_ENCODED);
    requestHeaders.put(HttpHeaderParams.ACCEPT, HttpContentTypes.APPLICATION_JSON);

    try {
      JSONObjectWrapper jsonObject =
          executeHttpPostRequest(restEndPoint, requestHeaders, null, new UrlEncodedFormEntity(parameters));
      JSONArray jsonArray = jsonObject.getJSONArray(JsonFields.ITEMS);
      if (jsonArray != null && jsonArray.length() == 1)
        return Comment.parse(JSONObjectWrapper.wrap(jsonArray.getJSONObject(0)));
    }
    catch (UnsupportedEncodingException e) {
      throw new ClientException(ClientException.ClientErrorCode.INVALID_ENCODING);
    }
    catch (JSONException e) {
      LogWrapper.e(TAG, e.getMessage());
    }
    return null;
  }

  public void deleteComment(long commentId) {
    String restEndPoint = "/comments/" + commentId + "/delete";

    List<BasicNameValuePair> parameters = getBasicNameValuePartListForPost();

    Map<String, String> requestHeaders = new HashMap<String, String>();
    requestHeaders.put(HttpHeaderParams.CONTENT_TYPE, HttpContentTypes.APPLICATION_FROM_URL_ENCODED);

    try {
      executeHttpPostRequest(restEndPoint, requestHeaders, null, new UrlEncodedFormEntity(parameters));
    }
    catch (UnsupportedEncodingException e) {
      throw new ClientException(ClientException.ClientErrorCode.INVALID_ENCODING);
    }
  }
}