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main.js
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main.js
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/*
*
* Find more about this app by visiting
* http://miniapps.co.uk/
*
* Copyright (c) 2010 Alex Gibson, http://miniapps.co.uk/
* Released under MIT license
* http://miniapps.co.uk/license/
*
*/
/*global window, QUOTA_EXCEEDED_ERR, alert, confirm */
var checklistApp = {
//get all items and displays the list
getAllItems: function() {
var checklist = '',
myArray = [],
completed = 0, //total number of checked items
total = 0, //total number of items in list
listlength = window.localStorage.length-1, //the total number of items held in localStorage
item = '';
for (var i = 0; i <= listlength; i++) {
item = window.localStorage.key(i);
myArray.push(item);
}
myArray.sort();
for (var j = 0; j <= listlength; j++) {
var sorteditem = myArray[j];
//check item is not temporary (i.e. stored on key-up from user input)
if (sorteditem !== 'inputvalue') {
//is the item checked
if (window.localStorage.getItem(sorteditem) === '1') {
checklist += '<li role="listitem"><input type="checkbox" checked/><label class="done">' + sorteditem + '</label><span class="delete" tabindex="0">×</span></li>';
completed ++;
total ++;
}
else if (window.localStorage.getItem(sorteditem) === '0') {
checklist += '<li role="listitem"><input type="checkbox" /><label>' + sorteditem + '</label><span class="delete" tabindex="0">×</span></li>';
total ++;
}
}
else {
document.querySelector('#name').value = window.localStorage.getItem(sorteditem);
}
}
if (checklist === '') {
checklist = '<li role="listitem" class="empty">List empty</li>';
}
//update totals
document.querySelector('#remaining').innerHTML = total - completed;
document.querySelector('#total').innerHTML = total;
//if all items are completed and the mail list button is showing, hide it.
if (completed === total) {
document.querySelector('#maillist').style.display = 'none';
}
//update view
document.querySelector('#checklist').innerHTML = checklist;
document.querySelector('#checklist').lastChild.style.border = '0';
},
//capture click events in list
eventDelegation: function() {
var listitems = document.querySelector('#checklist');
listitems.onclick = function (e) {
var event = e,
target = event.target,
name = '',
data = 0;
//<label>
if(target.tagName.toLowerCase() === 'label') {
name = target.innerHTML;
if (target.previousSibling.checked) {
data = 0;
}
else {
data = 1;
}
try {
window.localStorage.setItem(name, data);
} catch (err) {
if (err == QUOTA_EXCEEDED_ERR) {
alert('Quota exceeded!');
}
}
checklistApp.getAllItems();
}
//<input>
else if(target.tagName.toLowerCase() === 'input') {
name = target.nextSibling.innerHTML;
if (target.checked) {
data = 1;
}
else {
data = 0;
}
try {
window.localStorage.setItem(name, data);
} catch (error) {
if (error == QUOTA_EXCEEDED_ERR) {
alert('Quota exceeded!');
}
}
checklistApp.getAllItems();
}
//<span>
else if(target.tagName.toLowerCase() === 'span') {
name = target.previousSibling.innerHTML;
if (!confirm("Delete item: " + name + "?")) {
return;
}
window.localStorage.removeItem(name);
checklistApp.getAllItems();
}
};
},
//adds a single item
addNewItem: function() {
var name = document.querySelector('#name').value,
data = 0,
strippedString = '';
//strip html tags
strippedString = name.replace(/(<([^>]+)>)/ig, "");
//encode special characters
strippedString = strippedString.replace(/&/,"&");
strippedString = strippedString.replace(/</,"<");
strippedString = strippedString.replace(/>/,">");
//add item
if (strippedString !== "") {
try {
window.localStorage.setItem(strippedString, data);
} catch (e) {
if (e == QUOTA_EXCEEDED_ERR) {
alert('Quota exceeded!');
}
}
//clear the input value
document.querySelector('#name').value = "";
//remove temporary item from storage
window.localStorage.removeItem('inputvalue');
checklistApp.getAllItems();
}
else {
alert('Nothing to add!');
}
},
//delete all checked items
deleteChecked: function() {
if (!confirm("Delete checked items?")) { return; }
var i = 0,
length = window.localStorage.length - 1;
while (i <= length) {
var key = window.localStorage.key(i);
if (window.localStorage.getItem(key) === '1') {
window.localStorage.removeItem(key);
}
else { i++; }
}
checklistApp.getAllItems();
},
//delete all items
deleteAll: function() {
if (!confirm("Delete all items?")) { return; }
window.localStorage.clear();
checklistApp.getAllItems();
},
//updates the URL in mail items buttons
updateMail: function() {
//clear current mail link
document.querySelector('#maillink').href = '';
var mail = 'mailto:?',
subject = 'List',
list = '',
length = window.localStorage.length,
key = 0,
i = 0;
if (length !== 0) {
for (i = 0; i <= length-1; i++) {
key = window.localStorage.key(i);
//append to list if not checked
if (window.localStorage.getItem(key) === '0') {
list += window.localStorage.key(i) + '\n';
}
}
if (list !== '') {
mail += 'subject=' + encodeURIComponent(subject);
mail += '&body=' + encodeURIComponent(list);
document.querySelector('#maillink').href = mail;
}
}
},
//toggle mail items button
sendMail: function() {
var remaining = document.querySelector('#remaining').innerHTML,
maillist = document.querySelector('#maillist');
if (remaining !== '0') {
checklistApp.updateMail();
if (maillist.style.display === 'none') {
maillist.style.display = 'block';
}
else {
maillist.style.display = 'none';
}
}
else {
alert("You have no items to mail!");
}
},
//store temporary item in localStorage
storeInput: function() {
window.localStorage.setItem('inputvalue', this.value);
}
};
function loaded() {
//hide the address bar in Mobile Safari
window.scrollTo(0,0);
//hack to enable active pseudo selectors on buttons in mobile webkit
document.addEventListener("touchstart", function() {},false);
//check if the browser supports localStorage
if (typeof(window.localStorage) == 'undefined' ) {
alert('Your browser does not support HTML5 localStorage. Try upgrading.');
}
else {
//hide the mail list button
document.querySelector('#maillist').style.display = 'none';
//display all saved items
checklistApp.getAllItems();
checklistApp.eventDelegation();
document.querySelector('#name').addEventListener('keyup', checklistApp.storeInput, false);
document.querySelector('#deleteall').addEventListener('click', checklistApp.deleteAll, false);
document.querySelector('#deletechecked').addEventListener('click', checklistApp.deleteChecked, false);
document.querySelector('#sendmail').addEventListener('click', checklistApp.sendMail, false);
document.querySelector('#add').addEventListener('click', checklistApp.addNewItem, false);
}
}
window.addEventListener("load", loaded, true);