content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 io.amient.kafka.connect.irc;
  
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.utils.AppInfoParser;
  import org.apache.kafka.connect.connector.Task;
  import org.apache.kafka.connect.source.SourceConnector;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * A Generic Kafka Connector which takes a list of channels from an IRC server and creates 1 or more tasks depending
   * on maxTasks configuration argument.
   */
  
  public class IRCFeedConnector extends SourceConnector {
  
      public static final String IRC_HOST_CONFIG = "irc.host";
      public static final String IRC_PORT_CONFIG = "irc.port";
      public static final String IRC_CHANNELS_CONFIG = "irc.channels";
      public static final String TOPIC_CONFIG = "topic";
      private String[] channels = null;
      private String topic = null;
      private String port = null;
      private String host = null;
  
      @Override
      public String version() {
          return AppInfoParser.getVersion();
      }
  
      @Override
      public void start(Map<String, String> props) {
          channels = props.get(IRC_CHANNELS_CONFIG).split(",");
          host = props.get(IRC_HOST_CONFIG);
          port = props.get(IRC_PORT_CONFIG);
          topic = props.get(TOPIC_CONFIG);
      }
  
      @Override
      public Class<? extends Task> taskClass() {
          return IRCFeedTask.class;
      }
  
      @Override
      public List<Map<String, String>> taskConfigs(int maxTasks) {
          ArrayList<Map<String, String>> configs = new ArrayList<>();
          int numTasks = Math.min(maxTasks, channels.length);
          int channelsPerTask = Math.round(Float.valueOf(channels.length) / numTasks);
          for (int t = 0; t < numTasks; t++) {
              String channelSubset = "";
              for (int c = t * channelsPerTask; c < channels.length && c < (t + 1) * channelsPerTask; c++) {
                  channelSubset += ((channelSubset == "") ? "" : ",") + channels[c];
              }
              Map<String, String> config = new HashMap<>();
              config.put(IRC_HOST_CONFIG, host);
              config.put(IRC_PORT_CONFIG, port);
              config.put(TOPIC_CONFIG, topic);
              config.put(IRC_CHANNELS_CONFIG, channelSubset);
              configs.add(config);
          }
          return configs;
      }
  
      @Override
      public void stop() {
  
      }
  
      @Override
      public ConfigDef config() {
          return new ConfigDef()
                  .define(IRC_HOST_CONFIG, ConfigDef.Type.STRING, ConfigDef.Importance.HIGH, "IRC server host name, e.g `irc.wikimedia.org`")
                  .define(IRC_PORT_CONFIG, ConfigDef.Type.INT, ConfigDef.Importance.HIGH, "IRC server port, e.g. `6667`")
                  .define(IRC_CHANNELS_CONFIG, ConfigDef.Type.STRING, ConfigDef.Importance.HIGH, "coma-separated list of IRC channels to subscribe to, e.g. `#en.wikipedia`")
                  .define(TOPIC_CONFIG, ConfigDef.Type.STRING, ConfigDef.Importance.HIGH, "kafka topic to publish the feed into");
      }
  
  
  }
  
  