// updated: 29.01.2010 23:30

// Determine whether a variable is empty
function empty( mixed_var ) {
     return ( mixed_var === "" || mixed_var === 0 || mixed_var === "0" || mixed_var === null || mixed_var == undefined || mixed_var === false || ( is_array(mixed_var) && mixed_var.length === 0 ) );
}

function is_numeric(mixed_var) {
    return !isNaN(mixed_var);
}

function is_array(mixed_var){
	return typeof(mixed_var)=='object'&&(mixed_var instanceof Array);
}

function is_object( mixed_var ){
    if (mixed_var instanceof Array) {
        return false;
    } else {
        return (mixed_var !== null) && (typeof( mixed_var ) == 'object');
    }
}

function in_array(needle, haystack, strict) {
    var found = false, key, strict = !!strict;
    for (key in haystack) {
        if ((strict && haystack[key] === needle) || (!strict && haystack[key] == needle)) {
            found = true;
            break;
        }
    }
    return found;
}

function checkSelectValue(select_id) {
	select = document.getElementById(select_id);
	if ( (select.value == 0) || (select.value == '') ) {
		window.alert('Ошибка! Значение не выбрано');
		return false;
	} else {
		return true;
	}

}

function addEvent(elm, evType, fn, useCapture) {
        if (elm.addEventListener) {
                elm.addEventListener(evType, fn, useCapture);
        return true;
        }
        else if (elm.attachEvent) {
                var r = elm.attachEvent('on' + evType, fn);
                return r;
        }
        else {
                elm['on' + evType] = fn;
        }
}

function getElementsByAttribute(attr, val, container) {
	container = container||document
	var all = container.all||container.getElementsByTagName('*')
	var arr = []
	for(var k=0; k < all.length; k++) {
		if ( all[k].getAttribute(attr) == val) {
			arr[arr.length] = all[k];
		}
	}
	return arr
}

function toggle(obj) {

        var el = document.getElementById(obj);
        if ( el.style.display != 'none' ) {
                el.style.display = 'none';
        }
        else {
                el.style.display = '';
        }
}

function Dump(d,l) {
    if (l == null) l = 1;
    var s = '';
    if (typeof(d) == "object") {
        s += typeof(d) + " {\n";
        for (var k in d) {
            for (var i=0; i<l; i++) s += "  ";
            s += k+": " + Dump(d[k],l+1);
        }
        for (var i=0; i<l-1; i++) s += "  ";
        s += "}\n"
    } else {
        s += "" + d + "\n";
    }
    return s;
}

function makeLink(params) {
	if ( (!empty(params.module)) || (!empty(params.controller)) && (!empty(params.action)) ) {
		var link = '/';
		if (!empty(params.controller)) {
			link += params.controller + '/';
		}
		if (!empty(params.module)) {
			link += params.module + '/';
		}
		if ( (!empty(params.id)) && (is_numeric(params.id)) ) {
			link += params.id + '/';
		} else if ( (!empty(params.alias)) && (!is_numeric(params.alias)) ) {
			link += params.alias + '/';
		}
		if ( (!empty(params.action)) && (!in_array(params.action, ['index', '__default', 'view'])) ) {
			link += params.action + '/';
		}
		if (!empty(params.param1)) {
			link += params.param1 + '/';
		}
		if (!empty(params.param2)) {
			link += params.param2 + '/';
		}
		if (empty(params.dir_only)) {
			if ( (empty(params.page_number)) || (params.page_number == 1) ) {
				link += 'index';
			} else {
				link += 'page' + params.page_number;
			}
			if (!empty(params.type)) {
				link += '.' + params.type;
			} else {
				link += '.html';
			}
		}
		return link;
	} else {
		window.alert('Not enough params to make a link');
		return false;
	}
}

/* ========== Ajax functions ========== */

function ajaxRequest(url, params, handler, handler_params) {
	if (url) {
		url = 'http://' + window.location.host + url;
		var req = new JsHttpRequest();
	    req.onreadystatechange = function() {
	    	if (req.readyState == 4) {
				clearTimeout(timeout_id);
				if ( (req.responseJS) && (!req.responseText) ) {
					if (handler) {
						handler(req.responseJS, handler_params);
					}
					loadingOff();
				} else {
					loadingOff();
					if (req.responseText) {
						window.alert('Ajax error');
					}
				}
	    	}
		}
		loadingOn();
		req.open(null, url, true);
		req.send(params);
		var timeout_id = setTimeout(function() { ajaxAbort(req); }, 10000);
	}
}

function ajaxRequestByUrlParts(url_parts, params, handler, handler_params) {
	if (url_parts) {
		url_parts.type = 'ajax';
		if (url = makeLink(url_parts)) {
			ajaxRequest(url, params, handler, handler_params);
		}
	}
}

function ajaxPostRequestByUrlParts(url_parts, commit_name, params, handler, handler_params) {
	if (commit_name) {
		new_params = {commit: [], data: params};
		new_params.commit[commit_name] = true;
		ajaxRequestByUrlParts(url_parts, new_params, handler, handler_params);
	} else {
		window.alert('Empty commit_name');
	}
}

function ajaxAbort(request) {
	if (request) {
		request.abort();
		window.alert('Превышено время ожидания ответа от сервера. Попробуйте еще раз.');
	}
}

/* ========== Loading functions ========== */

function loadingOn() {
	createLoadingBlocks();
	document.getElementById('loading_image').style.display = 'block';
	document.getElementById('loading_lock').style.display = 'block';
	document.body.style.cursor='wait';
}

function loadingOff() {
	createLoadingBlocks();
	document.getElementById('loading_image').style.display = 'none';
	document.getElementById('loading_lock').style.display = 'none';
	document.body.style.cursor='auto';
}

function toggleLoading() {
	createLoadingBlocks();
	if (document.getElementById('loading_image').style.display == 'none') {
		loadingOn();
	} else {
		loadingOff();
	}
}

function createLoadingBlocks() {
	createLoadingImageDiv();
	createLoadingLockDiv();
}

function createLoadingImageDiv() {
	divElement = document.getElementById('loading_image');
	if (!divElement) {
		divElement = document.createElement('DIV');
		divElement.setAttribute('id', 'loading_image');
		divElement.innerHTML = '<img src="/img/loading.gif" width="100" height="100" style="border: 1px solid black;" />';
		divElement.style.position = 'absolute';
		divElement.style.overflow = 'hidden';
		divElement.style.zIndex = 999;
		divElement.style.display = 'none';
		document.body.appendChild(divElement);
	}
	divTop = Math.round((document.body.clientHeight - divElement.offsetHeight)/2) + document.body.scrollTop;
	divLeft = Math.round((document.body.clientWidth - divElement.offsetWidth)/2) + document.body.scrollLeft;
	divElement.style.top = divTop + 'px';
	divElement.style.left = divLeft + 'px';
	return divElement;
}

function createLoadingLockDiv() {
	divElement = document.getElementById('loading_lock');
	if (!divElement) {
		divElement = document.createElement('DIV');
		divElement.setAttribute('id', 'loading_lock');
		divElement.style.position = 'absolute';
		divElement.style.overflow = 'hidden';
		divElement.style.top = '0px';
		divElement.style.left = '0px';
		divElement.style.opacity = '0.2';
		divElement.style.filter = 'alpha(opacity=20)';
		divElement.style.backgroundColor = '#000000';
		divElement.style.zIndex = 998;
		divElement.style.display = 'none';
		if ( (navigator.userAgent.indexOf("MSIE 5") != -1) || (navigator.userAgent.indexOf("MSIE 6") != -1) ) {
			iframeElement = document.createElement('IFRAME');
			iframeElement.style.display = 'block';
			iframeElement.style.position = 'absolute';
			iframeElement.style.top = 0;
			iframeElement.style.left = 0;
			iframeElement.style.zIndex = -1;
			iframeElement.style.filter = 'mask()';
			iframeElement.style.width = '3000px';
			iframeElement.style.height = '3000px';
			divElement.appendChild(iframeElement);
		}
		document.body.appendChild(divElement);
	}
	divElement.style.width = document.body.scrollWidth + 'px';
	divElement.style.height = document.body.scrollHeight + 'px';
	return divElement;
}

/* ========== Actions functions ========== */

function showActions(event, module, id, current_action) {
	event = event || window.event;
	var target = event.target || event.srcElement;
	if (module) {
		var list = null;
		var list_name = (id) ? ('act_' + module + '_' + id) : ('act_' + module);
		if (!((list = $('#' + list_name)).length)) {
			list = $("<ul/>")
					.hide()
					.attr("id", list_name)
					.addClass("actions_list")
					.bind('mouseleave', function() { $(this).hide('normal'); });
			var not_loaded = true;
		}
		var offset = $(target).offset();
		list.css('top', offset.top + target.offsetHeight + 5);
		list.css('left', offset.left);
		if (not_loaded) {
			hideAllActionsLists();
			loadActions(list, module, id, current_action);
		} else if (list.is(':visible')) {
			list.hide('normal');
		} else {
			hideAllActionsLists();
			list.show('normal');
		}
	}
}

function hideAllActionsLists() {
	$('.actions_list', $('body')).hide();
}

function loadActions(list, module, id, current_action) {
	if (list && module) {
		var params = { controller: 'admin', module: module };
		if (id) {
			params.id = id;
			params.action = 'entity_actions';
		} else {
			params.action = 'module_actions';
		}
		ajaxRequestByUrlParts(params, null, function(result) { setActions(list, result, current_action); });
	}
}

function setActions(list, result, current_actions) {
	if (list && result.actions) {
		if (result.actions.length !== 0) {
			var in_admin = null;
			for (key in result.actions) {
				action = result.actions[key];
				action.title = action.title || action.menu_text;
				var onclick_code = '';
				if (action.ask) {
					onclick_code = 'onclick="confirmAction(\'' + action.url + '\', \'' + action.menu_text + '\');"';
					action.url = 'javascript:void(0);';
				}
				if (in_admin != action.in_admin) {
					if (in_admin !== null) {
						list.append('<li><hr></li>');
					}
					in_admin = action.in_admin;
				}
				list.append('<li><a href="' + action.url + '" title="' + action.title + '" ' + onclick_code + '>' + action.menu_text + '</a></li>');
			}
		} else {
			list.append('<li>Нет доступных действий</li>');
		}
		list.appendTo('body');
		list.show('normal');
	}
}

function confirmAction(url, menu_text) {
	confirm_text = 'Вы действительно хотите выполнить ' + menu_text + ' для этого элемента?';
	if (window.confirm(confirm_text)) {
		location.href = url;
	} else {
		return false;
	}
}

function processActionsLinks(container, module_name) {
	if (container) {
		links = $('*[data-module], *[data-id]', container).not('[data-processed]');
		links.click(function(event) {
			module_name = $(this).attr('data-module') || module_name;
			id = $(this).attr('data-id') || null;
			if (module_name) {
				showActions(event, module_name, id)
			}
			return false;
		});
		links.filter('a').attr('href', 'javascript:void(0);');
		links.filter('a').attr('title', 'Показать доступные действия для данного объекта');
		links.attr('data-processed', true);
	}
}

/* ========== Maps functions ========== */

function mapsGetCenter(center_lat, center_lng) {
	return new GLatLng(center_lat||50.000000, center_lng||36.260000);
}

function mapsGetApi(map_element_id, map_center, map_zoom) {
	var map = new GMap2(document.getElementById(map_element_id));
	map.setCenter(map_center || mapsGetCenter(), map_zoom || 13);
	map.setUIToDefault();
	$('body').unload(GUnload);
	return map;
}

function mapAddKs(map, ks) {
	if ( (ks.lat != '0.000000') && (ks.lng != '0.000000') ) {
		var marker = new GMarker(new GLatLng(ks.lat, ks.lng));
		GEvent.addListener(marker, "click", function() {
			marker.openInfoWindowHtml('<strong>' + ks.name + '</strong><br /><a href="' + ks.url + '">Подробнее...</a>');
		});
		map.addOverlay(marker);
	}
}

function mapAddBusSuburbanStop(map, stop) {
	if ( (ks.lat != '0.000000') && (ks.lng != '0.000000') ) {
		var marker = new GMarker(new GLatLng(ks.lat, ks.lng));
		GEvent.addListener(marker, "click", function() {
			marker.openInfoWindowHtml('<strong>' + ks.name + '</strong><br /><a href="' + ks.url + '">Подробнее...</a>');
		});
		map.addOverlay(marker);
	}
}