// Copyright 2019 Google LLC
//
// 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
//
//     https://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.google.sps.servlets;

import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.gson.Gson;
import java.io.IOException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Arrays;

/** Servlet that returns some example content. TODO: modify this file to handle comments data */
@WebServlet("/data")
public class DataServlet extends HttpServlet {

  @Override
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
    // String json = convertToJsonUsingGson(commentsList);  
    // response.setContentType("application/json;");
    // response.getWriter().println(json);
  }

  @Override
  public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { 
       String newComment = request.getParameter("comment");

       Entity commentEntity = new Entity("Comment");
       commentEntity.setProperty("comment", newComment);

       DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
       datastore.put(commentEntity);
       
       response.sendRedirect("/index.html");
  }

  private String convertToJsonUsingGson(ArrayList<String> commentsList) {
    Gson gson = new Gson();
    String json = gson.toJson(commentsList);
    return json;
  }
}

// Copyright 2019 Google LLC
//
// 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
//
//     https://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.google.sps.servlets;

import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.gson.Gson;
import java.io.IOException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Arrays;

/** Servlet that returns some example content. TODO: modify this file to handle comments data */
@WebServlet("/data")
public class DataServlet extends HttpServlet {

  @Override
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
      //TODO(ancar): load comments when an user requests it
  }

  @Override
  public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { 
       String newComment = request.getParameter("comment");

       Entity commentEntity = new Entity("Comment");
       commentEntity.setProperty("comment", newComment);

       DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
       datastore.put(commentEntity);

       response.sendRedirect("/index.html");
  }

  private String convertToJsonUsingGson(ArrayList<String> commentsList) {
    Gson gson = new Gson();
    String json = gson.toJson(commentsList);
    return json;
  }
}

Replace the commented code with a TODO.