/*
  -------------------------------------------------------------------------
  							W I G U M
	                    JavaScript Form Validator
  -------------------------------------------------------------------------
*/


//******  Constructor Function: Sets up the Javascript Form Validation  --->

function Validator(frmname) {

	this.formobj = document.forms[frmname];

	if(!this.formobj) {
		alert("BUG: could not get Form object "+frmname);
		return;
	}

	if(this.formobj.onsubmit) {
		this.formobj.old_onsubmit = this.formobj.onsubmit;
		this.formobj.onsubmit=null;
	} else {
		this.formobj.old_onsubmit = null;
	}

	this.formobj.onsubmit=form_submit_handler;
	this.addValidation = add_validation;
	this.setAddnlValidationFunction = set_addnl_vfunction;
	this.clearAllValidations = clear_all_validations;
}

//******  Constructor Function End  ---/>


//******  Function to Add Validation to a form field  --->

function add_validation(itemname,descriptor,errstr) {
	if(!this.formobj) {
		alert("BUG: the form object is not set properly");
		return;
	}

	var itemobj = this.formobj[itemname];

	if(!itemobj) {
		alert("BUG: Could not get the input object named: "+itemname);
		return;
	}

	if(!itemobj.validationset) {
		itemobj.validationset = new ValidationSet(itemobj);
	}

	itemobj.validationset.add(descriptor,errstr);
}

//******  Add Validation Function End  ---/>


function set_addnl_vfunction(functionname) {
	this.formobj.addnlvalidation = functionname;
}


function clear_all_validations() {
	for(var itr=0; itr < this.formobj.elements.length; itr++) {
		this.formobj.elements[itr].validationset = null;		
	}
}


function form_submit_handler() {
	for(var itr=0; itr < this.elements.length; itr++) {
		if(this.elements[itr].validationset && !this.elements[itr].validationset.validate()) {
		  return false;
		}
	}
	
	if(this.addnlvalidation) {
		str =" var ret = "+this.addnlvalidation+"()";
		eval(str);
	
	    if(!ret) {
	    	return ret;
	    }
	}
	
	return true;
}


function ValidationDesc(inputitem,desc,error) {
	this.desc=desc;
	this.error=error;
	this.itemobj = inputitem;
	this.validate=vdesc_validate;
}


function vdesc_validate() {
	if(!V2validateData(this.desc,this.itemobj,this.error)) {
		this.itemobj.focus();	
		return false;
	}
		
	return true;
}


function ValidationSet(inputitem) {
	this.vSet=new Array();
	this.add= add_validationdesc;
	this.validate= vset_validate;
	this.itemobj = inputitem;
}


function add_validationdesc(desc,error) {
	this.vSet[this.vSet.length] = new ValidationDesc(this.itemobj,desc,error);
}


function vset_validate() {
	// Set the element label for any errors (For Highlighting)
	var element_label = document.getElementById('lab_'+this.itemobj.name);
	
	for(var itr=0;itr<this.vSet.length;itr++) {
		if(!this.vSet[itr].validate()) {
		
			// We found an error, highlight the label
			element_label.style.backgroundColor = '#87C3F1';
			element_label.style.color = 'white';		
			
			return false;
		}
	}
	
	// At this point, the bad field has been re-checked and passed validation,
	// so reset the label highlights back to NULL	
	element_label.style.backgroundColor = '';
	element_label.style.color = '';	

	return true;
}

// Simple email validation checking
function validateEmailv2(email) {
    if(email.length <= 0) {
    	return true;
	}
	
    var splitted = email.match("^(.+)@(.+)$");
    
    if(splitted == null) return false;
    
    if(splitted[1] != null ) {
		var regexp_user=/^\"?[\w-_\.]*\"?$/;
		
		if(splitted[1].match(regexp_user) == null) {
			return false;
		}
    }
    
    if(splitted[2] != null) {
		var regexp_domain=/^[\w-\.]*\.[A-Za-z]{2,4}$/;
		
		if(splitted[2].match(regexp_domain) == null) {
			var regexp_ip =/^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;

			if(splitted[2].match(regexp_ip) == null) {
				return false;
			}
		}

      return true;
    }

	return false;
}


function V2validateData(strValidateStr,objValue,strError) {

	var epos = strValidateStr.search("=");
    var command  = "";
    var cmdvalue = "";
	if(epos >= 0) {
		command  = strValidateStr.substring(0,epos);
		cmdvalue = strValidateStr.substr(epos+1);
    } else {
		command = strValidateStr;
    }

    switch(command) { 
		case "req": 
		case "required": 
		{ 
			if(eval(objValue.value.length) == 0) {
				if(!strError || strError.length == 0) {
    	            strError = objValue.name + " : Required Field"; 
				}
				alert(strError); 
				return false; 
			}
		break;             
		}
        case "maxlength": 
        case "maxlen": 
		{ 
			if(eval(objValue.value.length) > eval(cmdvalue)) {
				if(!strError || strError.length == 0) { 
					strError = objValue.name + " : "+ cmdvalue +" characters maximum "; 
				}
				alert(strError + "\n[Current length = " + objValue.value.length + " ]"); 
				return false; 
             }
			break; 
		}
		case "minlength": 
		case "minlen": 
		{ 
			if(eval(objValue.value.length) <  eval(cmdvalue)) {
				if(!strError || strError.length ==0) {
					strError = objValue.name + " : " + cmdvalue + " characters minimum  "; 
				}
				alert(strError + "\n[Current length = " + objValue.value.length + " ]"); 
				return false;                 
			}
			break; 
		}
        case "alnum": 
        case "alphanumeric": 
		{ 
			var charpos = objValue.value.search("[^A-Za-z0-9]"); 
			if(objValue.value.length > 0 &&  charpos >= 0) {
				if(!strError || strError.length ==0) {
					strError = objValue.name+": Only alpha-numeric characters allowed "; 
				}
                alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
			}
			break; 
		}
        case "num": 
        case "numeric": 
		{ 
			var charpos = objValue.value.search("[^0-9]"); 
			if(objValue.value.length > 0 &&  charpos >= 0) {
				if(!strError || strError.length ==0) {
					strError = objValue.name+": Only digits allowed ";
				}
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
			}
			break;               
		}
        case "alphabetic":
        case "alpha":
		{ 
			var charpos = objValue.value.search("[^A-Za-z]"); 
			if(objValue.value.length > 0 &&  charpos >= 0) {
				if(!strError || strError.length ==0) {
					strError = objValue.name+": Only alphabetic characters allowed ";				
				}
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]"); 
                return false; 
			}
			break; 
		}
		case "alnumhyphen":
		{
			var charpos = objValue.value.search("[^A-Za-z0-9\-_]"); 
			if(objValue.value.length > 0 &&  charpos >= 0) {
				if(!strError || strError.length ==0) {
					strError = objValue.name+": characters allowed are A-Z,a-z,0-9,- and _";
				}
				alert(strError + "\n [Error character position " + eval(charpos+1)+"]");
				return false;
			}
			break;
		}
        case "email":
		{
			if(!validateEmailv2(objValue.value)) {
				if(!strError || strError.length ==0) {
					strError = objValue.name+": Enter a valid Email address ";
				}
                alert(strError);
                return false;
			}
			break;
		}
		case "lt":
		case "lessthan":
		{
			if(isNaN(objValue.value)) {
				alert(objValue.name+": Should be a number ");
				return false;
            }
			if(eval(objValue.value) >=  eval(cmdvalue)) {
				if(!strError || strError.length ==0) {
					strError = objValue.name + " : value should be less than "+ cmdvalue;
              	}
				alert(strError);
				return false;
			}
			break; 
		}
        case "gt": 
        case "greaterthan": 
		{ 
			if(isNaN(objValue.value)) {
				alert(objValue.name+": Should be a number ");
				return false;
			}
			if(eval(objValue.value) <=  eval(cmdvalue)) {
				if(!strError || strError.length ==0) {
					strError = objValue.name + " : value should be greater than "+ cmdvalue; 
				}
				alert(strError);
				return false;
			}
			break;
		}
        case "regexp": 
		{ 
			if(objValue.value.length > 0) {
				if(!objValue.value.match(cmdvalue)) {
					if(!strError || strError.length ==0) {
						strError = objValue.name+": Invalid characters found "; 
					}
					alert(strError); 
					return false;                   
				}
			}
           break;
		}
        case "dontselect": 
		{ 
			if(objValue.selectedIndex == null) {
				alert("BUG: dontselect command for non-select Item");
				return false;
            }
			if(objValue.selectedIndex == eval(cmdvalue)) {
				if(!strError || strError.length ==0) {
					strError = objValue.name+": Please Select one option "; 
				}
				alert(strError); 
				return false;                                   
			} 
			break; 
		}
        case "check":
        case "checked":
		{ 
			if(objValue.checked == false) {
				if(!strError || strError.length ==0) {
					strError = objValue.name + " must be checked."; 
				}
				alert(strError); 
				return false;                 
			}
			break; 
		}
    }

    return true;
}