<?php
class Replication extends MY_Controller
{
   function __construct() {
      parent::__construct();
      $this->db = $this->load->database("regional", true);
   }
   function index() {
      echo "Replication API";
   }
   function monitor() {
      //master 
      $sql = "show master status";
      $qry = $this->db->query($sql);
      if (! $qry) {
         echo json_encode( array("status" => "ERR" , "message" => "Errror Master Status : " . print_r($this->db->error(),true) ) ); 
         exit;
      }
      $rows = $qry->result_array();
      $master = array();
      $master["status"] = "Running";
      $master["file"] = $rows[0]["File"];
      $master["position"] = $rows[0]["Position"];
      
      $sql = "select * from m_branch where m_branchIsActive = 'Y'";
      $qry = $this->db->query($sql);
      if (! $qry ) {
         echo json_encode( array("status" => "ERR" , "message" => "Error M_Branch : " . print_r($this->db->error(),true) ) ); 
         exit;
      }
      $rows = $qry->result_array();
      $slave = array();
      foreach($rows as $r) {
         $branchCode = $r["M_BranchCode"];
         $branchName = $r["M_BranchName"];
         $branchIP = $r["M_BranchIPAddress"];
         $slave[] = array("code" => $branchCode, "name" => $branchName );
         $idx = count($slave) - 1;
         $url = "http://$branchIP/one-api/tools/replication/slave";
	 $get_rst = $this->get($url);
	 $rst  = json_decode($get_rst,true);
         if ($rst["status"] == "ERR" || ! $rst) {
		 $slave[$idx] = array_merge($slave[$idx], array("status"=>"Connection Issue (" . $rst["message"] . ")",
		"Behind" => -1, "Table" => array(), "MasterLogFile"=> "", "ReadPosition" => 0  ));
         } else {
            $slave[$idx] = array_merge($slave[$idx], $rst);
         }
      }  
      $result = array( "status" => "OK" , "master" => $master , "slave" => $slave) ;
      echo json_encode($result);
   }
   function get($url) {
      $ch = curl_init($url);                                                                      
      curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2);
      curl_setopt($ch, CURLOPT_TIMEOUT, 10); 
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);                                                                      
      $result = curl_exec($ch);
      if ( curl_error($ch) != "" ) {
         $result = json_encode(array("status" => "ERR", "message" => curl_error($ch) ));

      }
      curl_close($ch);
      return $result;
   }
   function post($url,$data) {
      $ch = curl_init($url);                                                                      
      curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");                                                                     
      curl_setopt($ch, CURLOPT_POSTFIELDS, $data);                                                                  
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);                                                                      
      curl_setopt($ch, CURLOPT_HTTPHEADER, array(                                                                          
         'Content-Type: application/json',                                                                                
         'Content-Length: ' . strlen($data))                                                                       
      );                                                                                                                   
      $result = curl_exec($ch);
      return $result;
   }
}