add telegram bot ( members count )

functions/conf.php

+<?php
+define('DATA_PATH','../data/');
+define('BOT_TOKEN','<BOT_TOKEN>');
+define('BOT_API','https://api.telegram.org/bot'.BOT_TOKEN.'/');
+define('CHAT',Array(
+  Array('chat_id'=>'<CHAT_ID>','chat_name'=>'discussion','data_url'=>DATA_PATH.'stats/telegram.csv','bot_offset'=>2)
+  )
+);
+define('UPDATE_INTERVAL',3600);
+?>

functions/tg.php

+<?php
+
+include_once('conf.php');
+
+function tg_bot($param){
+
+  $url=BOT_API.$param;
+  $ch = curl_init();
+  curl_setopt($ch, CURLOPT_URL, $url );
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+
+  $data = curl_exec($ch);
+  curl_close($ch);
+
+  return json_decode( $data, true );
+
+}
+
+function read_data($fn){
+  $fp=fopen($fn,'r');
+  $data=fread($fp,filesize($fp));
+  fclose($fp);
+  return $data;
+}
+
+function write_data($fn,$data,$mode){
+  $fp=fopen($fn,$mode);
+  fwrite($fp,$data);
+  fclose($fp);
+}
+
+function get_members_count($chat_id){
+  return intVal( tg_bot('getChatMembersCount?chat_id='.$chat_id )['result']);
+}
+
+function get_members_counts(){
+
+  $timestamp=date('Y-m-d',time());
+
+  foreach(CHAT as $chat){
+    $membersCount=0;
+
+    if( filemtime($chat['data_url']) == false ){
+      write_data($chat['data_url'],'timestamp,'.$chat['chat_name'],'a+');
+      $membersCount=get_members_count($chat['chat_id']);
+    } elseif( filemtime($chat['data_url']) + UPDATE_INTERVAL < time() ) {
+      $membersCount=get_members_count($chat['chat_id']);
+    }
+
+    if( $membersCount > 0 ){
+      write_data($chat['data_url'],$timestamp.','.( $membersCount-$chat['bot_offset'] ),'a+');
+    }
+
+  }
+}
+
+get_members_counts();
+
+?>