<?
	class validation
	{	
		public static function formalise($validation)
		{
			$reasons = array();
			
			if(count($validation) > 0)
				foreach($validation AS $validation)
					if(is_array($validation['hint']))
						foreach($validation['hint'] AS $reason)
							if(!empty($reason))
								$reasons[] = $reason;						
			
			$reasons = array_unique($reasons);		
			$reason = implode("<br />",$reasons);
			
			return $reason;		
		}
		
		public static function initial($context)
		{		
			$input_name = $context['input_name'];			
			$value = $context['value'];
			$name = $context['name'];
			$rules = $context['rule'];
			$id = $context['id'];
									
			$valid = array(
				"input_name" => $input_name,
				"hint" => "",
				"error" => "",
				"err" => ""
			);
					
			return $valid;
		}
				
		public static function validate($context)
		{		
			$input_name = $context['input_name'];			
			$value = trim($context['value']);
			$name = $context['name'];
			$rules = $context['rule'];
			$id = $context['id'];
																		
			$failed_icon = '<img src="images/chk_off.png" alt="invalid" />';
			$success_icon = '<img src="images/chk_on.png" alt="valid" />';		
			
			$rules_arr = explode("|",$rules);

			$status = true;
			$reasons = array();
						
			foreach($rules_arr AS $rule)
			{
				if(!empty($rule))
				{
					$rule_check = explode("[",$rule);				
					
					if($rule_check[0] == "min_length")
					{
						$rule_check_arr = explode("]",$rule_check[1]);									
						
						if(count($rule_check_arr) != 2)
						{
							$limit = $rule_check_arr[0];
							$reasons[] = "$name is invalid";
						}
						else
						{
							$length = $rule_check_arr[0];
							$check_reason = self::$rule_check[0]($value,$name,$length);						
							
							if(!empty($check_reason))
								$reasons[] = $check_reason;								
						}					
					}
					else if($rule_check[0] == "max_length")
					{
						$rule_check_arr = explode("]",$rule_check[1]);									
						
						if(count($rule_check_arr) != 2)
						{
							$limit = $rule_check_arr[0];
							$reasons[] = "$name is invalid";
						}
						else
						{
							$length = $rule_check_arr[0];

							$check_reason = self::$rule_check[0]($value,$name,$length);

							if(!empty($check_reason))
								$reasons[] = $check_reason;									
						}					
					}
					else if($rule_check[0] == "minimum")
					{
						$rule_check_arr = explode("]",$rule_check[1]);									
						
						if(count($rule_check_arr) != 2)
						{
							$limit = $rule_check_arr[0];
							$reasons[] = "$name is invalid";
						}
						else
						{
							$length = $rule_check_arr[0];

							$check_reason = self::$rule_check[0]($value,$name,$length);

							if(!empty($check_reason))
								$reasons[] = $check_reason;									
						}					
					}
					else if($rule_check[0] == "maximum")
					{
						$rule_check_arr = explode("]",$rule_check[1]);									
						
						if(count($rule_check_arr) != 2)
						{
							$limit = $rule_check_arr[0];
							$reasons[] = "$name is invalid";
						}
						else
						{
							$length = $rule_check_arr[0];

							$check_reason = self::$rule_check[0]($value,$name,$length);

							if(!empty($check_reason))
								$reasons[] = $check_reason;									
						}					
					}										
					else if($rule_check[0] == "exact_length")
					{
						$rule_check_arr = explode("]",$rule_check[1]);									
						
						if(count($rule_check_arr) != 2)
						{
							$limit = $rule_check_arr[0];
							$reasons[] = "$name is invalid";
						}
						else
						{
							$length = $rule_check_arr[0];
							
							$check_reason = self::$rule_check[0]($value,$name,$length);
							
							if(!empty($check_reason))
								$reasons[] = $check_reason;							
						}					
					}
					 
					else
					{
						if($rule == "required")
						{
							$check_reason = self::$rule($value,$name,$id);
							
							if(!empty($check_reason))
								$reasons[] = $check_reason;						
						}
						else if($rule == "required_include_zero")
						{
							$check_reason = self::$rule($value,$name,$id);
							
							if(!empty($check_reason))
								$reasons[] = $check_reason;						
						}
						else
						{						
							if((!in_array("required",$rules_arr)) && ($value == ""))
							{}
							else
							{						
								$check_reason = self::$rule($value,$name,$id);
								
								if(!empty($check_reason))
									$reasons[] = $check_reason;
							}
						}
					}
				}
			}
						
			$error_reason = "";
			$error_reason = implode(", ",$reasons);			
						
			$error_reason = (!empty($error_reason)) ? '<b>'.$name."</b> must ".$error_reason."!" : "";	

			$error = (count($reasons) == 0) ? "true" : "false";			
			$err = ($error == "false") ? $failed_icon : $success_icon;				
			
			$reason[$name] = $error_reason;
									
			$valid = array(
				"input_name" => $input_name,
				"hint" => $reason,
				"error" => $error,
				"err" => $err
			);
								
			return $valid;
			
		}

		public function minimum($value,$name,$length)
		{							
			return ($value < $length) ? "be more than $length" : "";
		}

		public function maximum($value,$name,$length)
		{							
			return ($value > $length) ? "be less than $length" : "";
		}


		public function min_length($value,$name,$length)
		{							
			return (strlen($value) < $length) ? "contain more than $length characters" : "";
		}

		public function max_length($value,$name,$length)
		{							
			return (strlen($value) > $length) ? "contain less than $length characters" : "";
		}

		public function exact_length($value,$name,$length)
		{							
			return (strlen($value) != $length) ? "contain exactly $length characters" : "";
		}
		
		public function valid_email($value,$name)
		{
			return ( ! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $value)) ? "a valid email address" : "";
		}

		public function valid_emails($value,$name,$id = "")
		{								
			$emails = explode(",",$value);
			
			$status = true;
			
			foreach($emails AS $email)
			{
				if(! preg_match("/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix", $value))
				{
					$status = false;
					break;
				}
			}
						
			return (!$status) ? "a valid email addresses" : "";
		}

		public function alpha($value,$name,$id = "")
		{
			return ( ! preg_match("/^([a-z])+$/i", $value)) ? "contain only alphabetical characters" : "";
		}

		public function alpha_numeric($value,$name,$id = "")
		{
			return ( ! preg_match("/^([a-z0-9])+$/i", $value)) ? "contain only alpha-numeric characters" : "";
		}

		public function alpha_dash($value,$name,$id = "")
		{
			return ( ! preg_match("/^([-a-z0-9_-])+$/i", $value)) ? "contain only alpha-numeric characters, underscores or dashes" : "";
		}

		public function numeric($value,$name,$id = "")
		{
			return (!preg_match( '/^[\-+]?[0-9]*\.?[0-9]+$/', $value)) ? "contain only numeric characters" : "";
		}

		public function integer($value,$name,$id = "")
		{
			return (!preg_match( '/^[\-+]?[0-9]+$/', $value)) ? "contain only integers" : "";
		}
		
		public function hour($value,$name,$id = "")
		{
			return (!preg_match( '/^([0-9]|[0-1][0-9]|[2][0-3])$/', $value)) ? "contain only hours from 0-23" : "";
		}
		
		public function minute($value,$name,$id = "")
		{
			return (!preg_match( '/^([0-9]|[0-5][0-9])$/', $value)) ? "contain only minutes from 0-59" : "";
		}

		public function is_natural($value,$name,$id = "")
		{   
			return (!preg_match( '/^[0-9]+$/', $value)) ? "contain only a natural number: 0, 1, 2, 3, etc." : "";
		}

		public function is_natural_no_zero($value,$name,$id = "")
		{   
			if ($value == 0)
			{
				return "contain only a natural number, but not zero: 1, 2, 3, etc.";
			}					
			else 
			{
				if ( ! preg_match( '/^[0-9]+$/', $value))
				{	
					return "contain only a natural number, but not zero: 1, 2, 3, etc.";
				}		
			}	
		}
																			
		public function required($value,$name,$id = "")
		{			
			$value = trim($value);
			
			return ((empty($value) || $value == "")&&$value!=0)  ? "Not be empty" : "";
		}
		
		public function required_include_zero($value,$name,$id = "")
		{			
			$value = trim($value);

			if (strlen($value)==0 || $value == "")
			{
				return "Not be empty";
			}
		}
		
		public function not_zero($value,$name,$id = ""){
			if ($value==0||$value=="")
			{
				return "Selected From Inventory";
			}
		}
		
		public function picture($value,$name,$id = "")
		{						
			if (($_FILES["uploadedfile"]["type"] == "image/gif") || 
				($_FILES["uploadedfile"]["type"] == "image/png") || 
				($_FILES["uploadedfile"]["type"] == "image/jpeg") || 
				($_FILES["uploadedfile"]["type"] == "image/pjpeg"))									
			{}	
			else
			{
				return "Upload Picture -  Wrong file Type!";
			}
		}								

		public static function job_exist($value,$name,$id = "")
		{
			global $database;			
			
			$status = true;
			$reason = "";
			
			if(empty($id))
			{
				$check_dep = "
				SELECT count(id)
				FROM jobs
				WHERE id  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_dep = "
				SELECT count(id)
				FROM jobs
				WHERE id  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_dep);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}	

										
		public static function company_name($value,$name,$id = "")
		{
			global $database;			
			
			$status = true;
			$reason = "";
			
			if(empty($id))
			{
				$check_dep = "
				SELECT count(id)
				FROM clients
				WHERE company_name  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_dep = "
				SELECT count(id)
				FROM clients
				WHERE company_name  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_dep);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}	

		public static function email_exist($value,$name,$id = "")
		{
			global $database;						
			
			$db_name = DB_CLIENT_ACCOUNTS;
			
			$status = true;
			$reason = "";
									
			if(empty($id))
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."users
				WHERE email  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."users
				WHERE email  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_dep);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}	

		public static function username_exist($value,$name,$id = "")
		{
			global $database;						
			
			$db_name = DB_CLIENT_ACCOUNTS;
			
			$status = true;
			$reason = "";
									
			if(empty($id))
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."users
				WHERE username  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."users
				WHERE username  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_dep);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}	


		public static function employee_id_exist($value,$name,$id = "")
		{
			global $database;						
			
			$db_name = DB_CLIENT_ACCOUNTS;
			
			$status = true;
			$reason = "";
									
			if(empty($id))
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."users
				WHERE employee_id  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."users
				WHERE employee_id  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_dep);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}	
				
		public static function sub_domain($value,$name,$id = "")
		{
			global $database;						
			
			$db_name = DB_GLOBAL_CLIENT;
			
			$status = true;
			$reason = "";
						
			if(empty($id))
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."account
				WHERE domain  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_dep = "
				SELECT count(id)
				FROM $db_name"."account
				WHERE domain  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_dep);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}	
		
		public static function supplier_name($value,$name,$id = "")
		{
			global $database;
						
			$status = true;
			$reason = "";
			
			if(empty($id))
			{
				$check_dep = "
				SELECT count(id)
				FROM suppliers
				WHERE name  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_dep = "
				SELECT count(id)
				FROM suppliers
				WHERE name  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_dep);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}
		
		public static function item_number_exist($value,$name,$id = "")
		{
			global $database;						
			
			$db_name = DB_CLIENT;
			
			$status = true;
			$reason = "";
									
			if(empty($id))
			{
				$check_item = "
				SELECT count(id)
				FROM $db_name"."materials_inventory
				WHERE item_number  = '$value'
				LIMIT 1
				";
			}
			else
			{
				$check_item = "
				SELECT count(id)
				FROM $db_name"."materials_inventory
				WHERE item_number  = '$value' AND id != '$id'
				LIMIT 1
				";				
			}			
			
			$exist = $database->getOne($check_item);
			
			if($exist == 1)
			{
				$status = false;
				$reason = "not already exist"; 		
			}		
			
			return $reason;
		}	
		 
	}
?>