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/*

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 -------------------------------------------------------------------------------

 Organization: Physicians Contracting Organization of Texas
       Domain: www.pcot.org
      Purpose: String function library
	     Date: Tuesday, November 2, 2004 11:05 PM CST
   Programmer: Benjamin Roberts (broberts@azaleatech.com)
               Azalea Technology, LLC.
               P.O. Box 131150
			   Tyler, TX 75713-1150
*/

// REMOVES EXTRA SPACE FROM THE BEGINNING, MIDDLE, AND END OF A STRING
function trim(inString){
	var retVal = "";
	var start = 0;
	var space = false;
	var newstr="";
	while ((start < inString.length) && (inString.charAt(start) == ' ')) ++start;
	var end = inString.length;
	while ((end > 0) && (inString.charAt(end - 1) == ' ')) --end;
	retVal = inString.substring(start, end);
	for(var i=0;i<retVal.length;i++){
		if(!space) newstr+=retVal.charAt(i);
		if(retVal.charAt(i)==" " && retVal.charAt(i+1)==" ") space=true;
		else space=false;
	}
	retVal=newstr;
	return retVal;
}

// TAKES A TEXT STRING AND RETURNS THE STRING FORMATTED LIKE A PROPER NOUN SUCH AS A PERSON'S NAME
// MODIFIED 2003.09.10 TO HANDLE NAMES THAT CONTAIN "Mc" LIKE "McDonald"
function toProperCase(str){
	var newstr="";
	str=trim(str);
	if(isSpace(str)) newstr;
	for(var i=0;i<str.length;i++){
		if(i==0 || str.charAt(i-1)==" ") newstr+=str.charAt(i).toUpperCase();
		else if((str.charAt(i-2)+str.charAt(i-1)).toUpperCase()=="MC") newstr+=str.charAt(i).toUpperCase();
		else newstr+=str.charAt(i).toLowerCase();
	}
	return newstr;
}

// EVALUATES A TEXT STRING AND TEST TO SEE IF IT IS BLANK OR CONTAINS ONLY BLANK SPACES
function isSpace(str){
	if(str=="") return true;
	if(str.replace(/ /g,"").length==0) return true;
	return false;
}

// DETERMINES WHETHER A STRING IS A VALID POSITIVE INTEGER
function isPosInt(str){
	var validChars = "0123456789";
	var validChar = true;
	if(str=="") return false;
	for(i=0;i<str.length&&validChar;i++){
		validChar = false;
		for(j=0;j<validChars.length&&!validChar;j++){
			if(str.charAt(i)==validChars.charAt(j))
				validChar = true;
		}
	}
	return validChar;
}

// DETERMINES WHETHER A STRING IS A VALID CURRENCY VALUE
function isCurrency(str){
	var validChars = "0123456789.";
	var validChar = true;
	if(str=="") return false;
	for(i=0;i<str.length&&validChar;i++){
		validChar = false;
		for(j=0;j<validChars.length&&!validChar;j++){
			if(str.charAt(i)==validChars.charAt(j))
				validChar = true;
		}
	}
	return validChar;
}

/*
 VALIDATES THE FORMAT OF A UNITED STATES TELEPHONE NUMBER

 ACCEPTED FORMATS:
   999 999 9999
   999-999-9999
   999.999.9999
   (999)999-9999
   (999)999 9999
   (999) 999-9999
   (999) 999 9999

 ACCEPTED EXTENSION FORMATS:
   123456
   -123456
   - 123456
   x123456
   x 123456
   ext123456
   ext 123456
   ext.123456
   ext. 123456
   extension123456
   extension 123456
*/
function validTelephoneNumber(str){
	if(isSpace(str)) return false;
	var pattern = /^((\d{3,3}[-\.\s])|(\(\d{3,3}\)\s?))\d{3,3}[-\.\s]\d{4,4}(\s?(x|(ext\.?)|extension|-|\s)\s?\d{1,6})?$/i;
	return pattern.test(str);
}

// VALIDATES AN SUPPOSED EMAIL STRING
function validEmail(email){
	invalidChars = "/:,;";
	if (email == "") return false;
	if (email.indexOf("@mailinator.com")!=-1) return false; // AVOIDS MAILINATOR.COM EMAIL ADDRESSES
	for (i=0; i<invalidChars.length; i++){
		badChar = invalidChars.charAt(i);
		if (email.indexOf(badChar,0) > -1) return false;
	}
	atPos = email.indexOf("@",1);
	if (atPos == -1) return false;
	if (email.indexOf("@",atPos+1) > -1) return false;
	periodPos = email.indexOf(".",atPos);
	if (periodPos == -1) return false;
	if (periodPos+3 > email.length) return false;
    return true;
}

// VALIDATES A WEB SITE ADDRESS USING REGULAR EXPRESSIONS
function validWebsiteAddress(str){
	if(isSpace(str)) return false;
	var pattern = /^(?:(?:ftp|https?):\/\/)?(?:[a-z0-9](?:[-a-z0-9]*[a-z0-9])?\.)+(?:com|edu|biz|org|gov|int|info|mil|net|name|museum|coop|aero|[a-z][a-z])\b(?:\d+)?(?:\/[^;"'<>()\[\]{}\s\x7f-\xff]*(?:[.,?]+[^;"'<>()\[\]{}\s\x7f-\xff]+)*)?/;
	return pattern.test(str);
}

// VALIDATES AN SUPPOSED EMAIL STRING
function validTextString(str){
	intUnicodeValue = 0;
	intBackup = 0;
	var valid = false;
	if (str == "") return false;
	for (i=0;i<str.length;i++){
		intUnicodeValue = str.charCodeAt(i)
		if((intUnicodeValue<32||intUnicodeValue>126)&&(intUnicodeValue!=13&&intUnicodeValue!=10)){
			if(i<35) intBackup = 0;
			else intBackup = 35;
			alert("Invalid Character Found!\n\n"+str.substr(i-intBackup,intBackup+1)+" << invalid character");
			return false;
		}
	}
	return true;
}

function cleanTextString(obj,str){
	if(!obj) return "";
	if(isSpace(obj.value)) return "";
	if(isSpace(str)) return "";
	var objRegExp = new RegExp(str,"g");
	return obj.value.replace(objRegExp,"");
}

// VALIDATES A POSTAL CODE
function isValidPostalCode(country,postalcode){
	
	if(isSpace(postalcode)) return false;  // postal code is empty
	country = country.toLowerCase(); // lower case the country
	
	// Check United States Postal Codes
	if(country=="united states"){
	    var pattern = /^\d{5,5}(-\d{4,4})?$/i;
	    return pattern.test(postalcode);
	}

	// Formats of international postal codes vary too much to attempt to validate format is non-US
	return true;
}

// FUNCTION TO REMOVE DOUBLE QUOTES FROM A STRING
function removeDoubleQuotes(str){
	var newStr = "";
	if(!str) return newStr;
	if(isSpace(str)) return newStr;
	
	for(var i=0;i<str.length;i++){
		if(str.charAt(i)!="\"") newStr += str.charAt(i);
	}
	return newStr;
}

// FUNCTION TO WRITE A LONG STRING WITH "X" NUMBER OF CHARACTERS PER LINE
function writeLongStringOnMultipleLines(str,charsPerLine,charSpacesPerLine){
	var newStr = ""
	var charSpace = ""
	
	if( (!isPosInt(charsPerLine)) || (!isPosInt(charSpacesPerLine)) || isSpace(str) ) return newStr;
	for(var k=0;k<charSpacesPerLine;k++) charSpace += " ";
	
	for(var i=0;i<str.length;i++){
		if(i>0) newStr += ("\n" + charSpace);
		for(var j=0;j<charsPerLine;j++){
			newStr += str.charAt(i);
			i++;
		}
	}
	return newStr
}

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