// THIS JS LETS US EASILY SORT TABLES CLIENT SIDE
// THE ORIGINAL CODE IS IN SORTTABLE.JS
// THIS CODE HAS BEEN MODIFIED TO ALLOW MORE OPTIONS AND STYLE HANDLING
// 2006-07 -jra: NOW LOOKS FOR 'summary="sortable"' ON TABLE TAG SO WE CAN USED ANY CLASS ON THE TABLE
// 2006-08 -jra: ADDED CAPACITY TO ALLOW SUM ROWS, PUT "title = 'summaryRow' " IN YOUR ROW(S) YOU WISH TO EXCLUDE FROM SORTING


//alert('Got to the js file');
addEvent(window, "load", sortables_init);
var SORT_COLUMN_INDEX;

// changed this function it to look for 'summary="sortable"' instead so we can use our own classes - jra
function sortables_init() {
    // Find all tables with class sortable and make them sortable
    if (!document.getElementsByTagName) return;
    tbls = document.getElementsByTagName("table");
    for (ti=0;ti<tbls.length;ti++) {
        thisTbl = tbls[ti];
//        if (((' '+thisTbl.className+' ').indexOf("sortable") != -1) && (thisTbl.id)) {
	if (((' '+thisTbl.summary+' ').indexOf("sortable") != -1) && (thisTbl.id)) {
            //initTable(thisTbl.id);
            ts_makeSortable(thisTbl);
        }
    }
}

function ts_makeSortable(table) {	
//	alert(thisTbl.className); //for testing
	// set some style info -jra
	//ttipmsg = 'here we go';
	omover =' onMouseOver=" ' + 
	' this.className=\'' + thisTbl.caption + //trying to use the caption prop to pass style...
//	' this.className=\'' + thisTbl.className + 
	' \'; this.style.cursor =\'pointer\'; this.style.color =\'white\'; " ' ;
	omout = ' onMouseOut="this.className=\'' + thisTbl.caption + ' \'; this.style.color =\'maroon\'; " ';
//	omout = ' onMouseOut="this.className=\'' + thisTbl.className + ' \'; this.style.color =\'navy\'; " ';
	fstyle = ' style="color:maroon" '; //set original font color

	if (table.rows && table.rows.length > 0) {
        var firstRow = table.rows[0];
    }
    if (!firstRow) return;
    // We have a first row: assume it's the header, and make its contents clickable links
    for (var i=0;i<firstRow.cells.length;i++) {
        var cell = firstRow.cells[i];
        var txt = ts_getInnerText(cell);
//        cell.innerHTML = '<a href="#" class="sortheader" '+ //original line
//		cell.innerHTML = '<a class="' + thisTbl.className + '" ' + 
		cell.innerHTML = '<a class="' + thisTbl.caption + '" ' + 
		fstyle + omover + omout + 
//		'onclick="ts_resortTable(this, '+i+');return false;">' + //original line
		'onclick="ts_resortTable(this, '+i+');">' + //took out the return false as i removed the href anyway -jra
        txt+'<span class="sortarrow">&nbsp;&nbsp;&nbsp;</span></a>';
    }
}

function ts_getInnerText(el) {	//alert('hithere');
	if (typeof el == "string") return el;
	if (typeof el == "undefined") { return el };
	if (el.innerText) return el.innerText;	//Not needed but it is faster
	var str = "";
	
	var cs = el.childNodes;
	var l = cs.length;
	for (var i = 0; i < l; i++) {
		switch (cs[i].nodeType) {
			case 1: //ELEMENT_NODE
				str += ts_getInnerText(cs[i]);
				break;
			case 3:	//TEXT_NODE
				str += cs[i].nodeValue;
				break;
		}
	}
	return str;
}

function ts_resortTable(lnk,clid) {
    // get the span
    var span;
    for (var ci=0;ci<lnk.childNodes.length;ci++) {	//alert('ci: ' && ci);
        if (lnk.childNodes[ci].tagName && lnk.childNodes[ci].tagName.toLowerCase() == 'span') span = lnk.childNodes[ci];
    }
	//	alert (span); //for testing
    var spantext = ts_getInnerText(span); //alert('spantext: ' && spantext);
    var td = lnk.parentNode;
    var column = clid || td.cellIndex;
    var table = getParent(td,'TABLE'); //alert('table: ' && table);
    
    // Work out a type for the column
    if (table.rows.length <= 1) return;
    var itm = ts_getInnerText(table.rows[1].cells[column]);
    sortfn = ts_sort_caseinsensitive;
    if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sortfn = ts_sort_date;
    if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sortfn = ts_sort_date;
    if (itm.match(/^[£$]/)) sortfn = ts_sort_currency;
    if (itm.match(/^[\d\.]+$/)) sortfn = ts_sort_numeric;
    SORT_COLUMN_INDEX = column;
    var firstRow = new Array();
    var newRows = new Array();
    for (i=0;i<table.rows[0].length;i++) { firstRow[i] = table.rows[0][i]; }
    for (j=1;j<table.rows.length;j++) { newRows[j-1] = table.rows[j]; }

    newRows.sort(sortfn);

    if (span.getAttribute("sortdir") == 'down') {
        ARROW = '&nbsp;&nbsp;&uarr;';
        newRows.reverse();
        span.setAttribute('sortdir','up');
    } else {
        ARROW = '&nbsp;&nbsp;&darr;';
        span.setAttribute('sortdir','down');
    }
    
    // We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
    // don't do sortbottom rows
	//for (i=0;i<newRows.length;i++) { if (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1))) {table.tBodies[0].appendChild(newRows[i]);}
//	}
    for (i=0;i<newRows.length;i++) { 
		//modified to exclude summary/excluded rows -jra
		if (newRows[i].title != 'summaryRow' && (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1)))) 
		
		{
		//original	
		//if (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1))) {
			table.tBodies[0].appendChild(newRows[i]); 
		//	added some cool color alternating rows	-jra	
		//	if(i % 2) {newRows[i].style.background = '#EEEEEE';} else {newRows[i].style.background = 'white';};
			if(i % 2) {newRows[i].className= 'AR1';} else {newRows[i].className= 'AR2';};
		}
	}
	
	//THIS LOOP ADDED TO ALLOW PUSHING SUMMARY ROWS (FOR REPORTS, ETC) TO STICK TO BOTTOM ROW -jra
	for (i=0;i<newRows.length;i++) { 
		if (newRows[i].title == 'summaryRow') 
		{
			table.tBodies[0].appendChild(newRows[i]); 
		}
		
	}
	
	
    // do sortbottom rows only
    for (i=0;i<newRows.length;i++) {
		if (newRows[i].className && (newRows[i].className.indexOf('sortbottom') != -1)) {
		//alert('this row qualifies for sorting:'  + i);				
			table.tBodies[0].appendChild(newRows[i]);
		}
		//else{
		//alert('this row does not qualify: ' + i);
		//}
	}
    
    // Delete any other arrows there may be showing
    var allspans = document.getElementsByTagName("span");
    for (var ci=0;ci<allspans.length;ci++) {
        if (allspans[ci].className == 'sortarrow') {
            if (getParent(allspans[ci],"table") == getParent(lnk,"table")) { // in the same table as us?
                allspans[ci].innerHTML = '&nbsp;&nbsp;&nbsp;';
            }
        }
    }
        
    span.innerHTML = ARROW;
}

function getParent(el, pTagName) {
	if (el == null) return null;
	else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())	// Gecko bug, supposed to be uppercase
		return el;
	else
		return getParent(el.parentNode, pTagName);
}
function ts_sort_date(a,b) {
    // y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
    if (aa.length == 10) {
        dt1 = aa.substr(6,4)+aa.substr(3,2)+aa.substr(0,2);
    } else {
        yr = aa.substr(6,2);
        if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
        dt1 = yr+aa.substr(3,2)+aa.substr(0,2);
    }
    if (bb.length == 10) {
        dt2 = bb.substr(6,4)+bb.substr(3,2)+bb.substr(0,2);
    } else {
        yr = bb.substr(6,2);
        if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
        dt2 = yr+bb.substr(3,2)+bb.substr(0,2);
    }
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
}

function ts_sort_currency(a,b) { 
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'');
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).replace(/[^0-9.]/g,'');
    return parseFloat(aa) - parseFloat(bb);
}

function ts_sort_numeric(a,b) { 
    aa = parseFloat(ts_getInnerText(a.cells[SORT_COLUMN_INDEX]));
    if (isNaN(aa)) aa = 0;
    bb = parseFloat(ts_getInnerText(b.cells[SORT_COLUMN_INDEX])); 
    if (isNaN(bb)) bb = 0;
    return aa-bb;
}

function ts_sort_caseinsensitive(a,b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]).toLowerCase();
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]).toLowerCase();
    if (aa==bb) return 0;
    if (aa<bb) return -1;
    return 1;
}

function ts_sort_default(a,b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX]);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
    if (aa==bb) return 0;
    if (aa<bb) return -1;
    return 1;
}


function addEvent(elm, evType, fn, useCapture)
// addEvent and removeEvent
// cross-browser event handling for IE5+,  NS6 and Mozilla
// By Scott Andrew
{
  if (elm.addEventListener){
    elm.addEventListener(evType, fn, useCapture);
    return true;
  } else if (elm.attachEvent){
    var r = elm.attachEvent("on"+evType, fn);
    return r;
  } else {
    alert("Handler could not be removed");
  }
}