<?php

class AGC_Util {
	public static function force_new_electrum_address($cryptoId, $mpk) {
		
		$repo = new AGC_MPK_Repo($cryptoId, $mpk);

		$startIndex = $repo->get_next_address_index($mpk);	

		$address = AGC_Electrum::create_electrum_address($cryptoId, $mpk, $startIndex);		

		try {
			while (AGC_Blockchain::is_dirty_address($cryptoId, $address)) {
				
				$repo->insert_address_into_db($address, $startIndex, 'dirty');
				$startIndex = $startIndex + 1;
				$address = AGC_Electrum::create_electrum_address($cryptoId, $mpk, $startIndex);
				set_time_limit(30);
			}
		}
		catch ( \Exception $e ) {
			AGC_Util::log(__FILE__, __LINE__, 'Could not create new addresses: ' . $e->getMessage());
			throw new \Exception($e);
		}

		$repo->insert_address_into_db($address, $startIndex, 'ready');
	}

	public static function log($fileName, $lineNumber, $message) {
		
		$logFileName = dirname(__DIR__) . '/agc.log';
		
		if (file_exists($logFileName)) {
			$file = fopen($logFileName, 'r+');
			if ($file) {
				fseek($file, 0, SEEK_END);
			}
		}
		else
		{
			$file = fopen($logFileName, 'w');
		}

		if ($file) {
			fwrite($file, "\r\n" . date("m-d-Y, G:i:s T") . "$fileName - $lineNumber: " . $message);
			fclose($file);
		}
	}
	
	public static function serialize_buffer($buffer) {
		return self::safe_string_escape(serialize($buffer));
	}

	// credit: http://www.php.net/manual/en/function.mysql-real-escape-string.php#100854
	private static function safe_string_escape ($str)
	{
	   $len=strlen($str);
	   $escapeCount=0;
	   $targetString='';
	   for ($offset=0; $offset<$len; $offset++)
	   {
	     switch($c=$str{$offset})
	     {
	         case "'":
	         // Escapes this quote only if its not preceded by an unescaped backslash
	                 if($escapeCount % 2 == 0) $targetString.="\\";
	                 $escapeCount=0;
	                 $targetString.=$c;
	                 break;
	         case '"':
	         // Escapes this quote only if its not preceded by an unescaped backslash
	                 if($escapeCount % 2 == 0) $targetString.="\\";
	                 $escapeCount=0;
	                 $targetString.=$c;
	                 break;
	         case '\\':
	                 $escapeCount++;
	                 $targetString.=$c;
	                 break;
	         default:
	                 $escapeCount=0;
	                 $targetString.=$c;
	     }
	   }
	   return $targetString;
	}
}

?>