ÿþ//Javascript



/*

Function: buildSearchString

Description: Examines strInput, removes illegal characters and selected keywords.

						 Builds and returns a Verity formatted search string.

*/

function buildSearchString(searchString, keywordsToRemove) {

  var keyWords;

  var veritySearchString;



	// Remove illegal characters

	// Feb 09 2009 - BOBMA - swapped out an iterative function used in version 1 for this replace call.

	searchString = searchString.replace(/['=().><!`@{}*,_~;:^+/\\|&#[\]]/gi, "");



  // Removes any unmatching double quotes

  searchString = removeExtraQuotes(searchString);



  // Returns an array containing keyWords and quoted phrases

  // Feb 09 2009 - BOBMA - swapped out a very iterative function for this regular expression use.

  keyWords = searchString.match(/\b\S+\b|"[^"]*"/gi);



  // Builds a Verity based search string based upon an

  // array of keywords

  veritySearchString = buildVeritySearchString(keyWords, keywordsToRemove);



  return veritySearchString;

}



/*

Function : buildVeritySearchString

Description : Builds a Verity search string based upon an array of keywords.

*/

function buildVeritySearchString(keyWords, keywordsToRemove) {

	var basicVerityClause = "<MANY><THESAURUS>xxxx <ACCRUE> <MANY><STEM>yyyy"

  var newClause = "";

  var newSearchString = "";

  var quote = "\"";

  var keyWord = "";

  var ignoredRegExp = GetIgnoredKeywordsRegExp(keywordsToRemove);



	// Loop through the keyWords array and build a verity search clause for each

  // keyWord that is not enclosed in double quotes.

  // If the keyWord is enclosed in double quotes, just append the keyWord to the verity search string.

  for (i = 0 ; i < keyWords.length ; i++) {

  	keyWord = keyWords[i];



  	if ( keyWord.indexOf(quote) == -1 ) {



			//Feb 09 2009 - BOBMA - do not include specified words in verity search string

      if (!ignoredRegExp.test(keyWord)) {

      	// Special case if keyWord is 'and', 'or', or 'not'. It must be wrapped in single quotes to cooperate with <accrue>.

        if (keyWord == "and" || keyWord == "or" || keyWord == "not") {

        	keyWord = "'" + keyWord + "'";

        }

        newClause = basicVerityClause.replace("xxxx", keyWord);

        newClause = newClause.replace("yyyy", keyWord);

        newSearchString = AppendSearchString(newSearchString, newClause);

			}

    } else {

    	//this is a quoted phrase so add it as is.

      newSearchString = AppendSearchString(newSearchString, keyWord);

    }

  }



  return newSearchString;

}



/*

Function : AppendSearchString

Description : returns the search string with the new clause joined by the "ACCRUE" verity opperator.

*/

function AppendSearchString(searchString, newClause) {

	if (searchString.length > 0)

		searchString += " <ACCRUE> ";

					

	return searchString += newClause;

}





/*

Feb 09 2009 - BOBMA

Function : GetIgnoredKeywordsRegExp

Description : Creates the regular expression for matchcing against supplied keywords

Parameters: Comma seperated list of words

*/

function GetIgnoredKeywordsRegExp(keywords) {

	var pattern = "";



	if (keywords == null || keywords.length <= 0)

		return new RegExp("^$");	//we don't want to match anything in this case.



	//loop through each of the keywords and create the appropriate reg exp match

	var words = keywords.split(",");

	for (i=0; i<words.length; i++) {

		pattern += (i == 0 ? "" : "|") + "\\b" + words[i].trim() + "\\b";

	}

	

	return new RegExp(pattern, "gi");

}





/*

Function : removeExtraQuotes

Description: Removes unmatched double quotes within a string. If strInput contains 

an odd number of double quotes ("), this function will remove the last double quote 

from the string.

*/

function removeExtraQuotes(strInput) {



  var ds = new Array();

  var di = 0;

  var quote = "\"";

  var pos = 0;

  var start = 0;

  var numberOfElements = 0;

  var newString = "";



  // Get the position of the first double quote

  pos = strInput.indexOf(quote, start);



  // Add an element to array ds that contains the position of every double quote

  // in the string strInput

  while (pos != -1) {

    ds[di++] = pos;

    start = pos + 1;

    pos = strInput.indexOf(quote, start);

  }



  numberOfElements = ds.length;



  // If there is an odd number of elements in ds, then remove the last double quote

  // from string strInput, otherwise return the string unchanged

  if ( (numberOfElements % 2) != 0 ) {

    pos = ds[numberOfElements - 1];

    newString = strInput.substring(0, pos) + strInput.substring(pos + 1);

  } else {

    newString = strInput;

  }



  return newString;

}





/*

Function : searchHelp

Description: Opens a new browser window with a URL based on the incoming value.

*/

function searchHelp(location) {

  var helpWindow = null;



  helpWindow = window.open(''+location+'','', 'width=575,height=200,left=250,top=250,toolbar=0,location=0,directories=0,status=0,resizable=1,scrollbars=1,menubar=0')

}





/*

Function : trim

Description: Helper function to remove spaces around a string

*/

String.prototype.trim = function() {

  return this.replace(/^\s+|\s+$/g, "");

}