/*

	-- -- -- -- -- -- --
	mezzoblue v6 archives javascript

	last edit: 31 dec 08
	-- -- -- -- -- -- --

	File Contents:
	Functions to add UI finishing touches to the archive selectors
	
*/


function getSelected(obj) {
	if (obj.hasChildNodes()) {
		var children = obj.childNodes;
		for (i = 0; i < children.length; i++) {
			if (children[i].nodeName == "OPTION") {
				if (children[i].selected) {
					return children[i].getAttribute("value");
				}
			}
		}
	}
}



function adjustMonths() {
	var year = document.getElementById("archive-year");
	var month = document.getElementById("archive-month");
	var monthsel = document.getElementById("selected-month");
	var selectedMonth = monthsel.getAttribute("value");

	var d = new Date();
	var skip = false;
	var monthNames = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");


	// loop variables
	var children, newMonth, monthValue, i, txt;

	// find the currently selected year
	var selectedYear = getSelected(year);

	// rebuild the monthly menu
	if (month.hasChildNodes()) {
		children = month.childNodes;

		// clear the menu
		while (month.firstChild) {
			month.removeChild(month.firstChild);
		}

		// rewrite the menu
		for (i = 0; i < monthNames.length; i++) {
			skip = false;
			// I only have archives for nov/dec 2002
			if (selectedYear == "2002") {
				if (i < 10) {
					skip = true;
				}
			}
			// and lets get rid of anything past the current month
			if (selectedYear == (d.getFullYear())) {
				if (i > d.getMonth()) {
					skip = true;
				}
			}
			if (skip == false) {
				newMonth = document.createElement("option");
				monthValue = String(i + 1);

				if (monthValue.length == 1) {
					monthValue = "0" + monthValue;
				}
				newMonth.setAttribute("value", monthValue);

				if (i == (selectedMonth - 1)) {
					newMonth.setAttribute("selected", "selected");
				}
				// newMonth.text = monthNames[i];
				txt = document.createTextNode(monthNames[i]);
				newMonth.appendChild(txt);
				month.appendChild(newMonth);
			}
		}
	}
}


function adjustAction() {
	var formObj = document.getElementById("archive-form");
	var year = document.getElementById("archive-year");
	var month = document.getElementById("archive-month");

	// find the currently selected year
	var selectedYear = getSelected(year);

	// find the currently selected year
	var selectedMonth = getSelected(month);

	formObj.setAttribute("action", "/archives/" + String(selectedYear) + "/" + String(selectedMonth) + "/");
}



window.onload = function() {
	// Test if DOM is available
	if(!document.getElementById || !document.createElement || !document.appendChild){return;}

	adjustMonths();
	adjustAction();

	var year = document.getElementById("archive-year");
	year.onchange = function() {
		adjustMonths();
		adjustAction();
	}

	var month = document.getElementById("archive-month");
	month.onchange = function() {
		adjustAction();
	}
}