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let form;
let unsavedChanges = false;
const pageurl = basepath + pageid;
const myWorker = new Worker(jspath + 'worker.js');
window.onload = () => {
form = document.getElementById('update');
let inputs = form.elements;
for (i = 0; i < inputs.length; i++) {
inputs[i].onchange = changeHandler;
inputs[i].oninput = changeHandler;
}
form.addEventListener("submit", function (event) {
event.preventDefault();
submitHandler(this);
});
window.onkeydown = keyboardHandler;
window.onbeforeunload = confirmExit;
myWorker.postMessage({
type: 'init',
pageurl: pageurl,
});
myWorker.postMessage({ type: 'stillEditing' });
};
/**
* Manage a keyboardEvent
* @param {KeyboardEvent} e
*/
function keyboardHandler(e) {
if (e.composed) {
if (e.ctrlKey) {
// console.log(e.key);
switch (e.key) {
case 's':
e.preventDefault();
submitHandler(form);
return false;
}
}
}
}
/**
* Manage change event
* @param {Event} e
*/
function changeHandler(e) {
unsavedChanges = true;
}
/**
* Manage submit event
* @param {HTMLFormElement} form
*/
function submitHandler(form) {
unsavedChanges = false;
var xhr = new XMLHttpRequest();
var fd = new FormData(form);
xhr.addEventListener("load", function(event) {
alert("updated");
});
xhr.addEventListener("error", function(event) {
alert('Error while trying to update.');
});
xhr.open(form.method, form.action);
xhr.send(fd);
}
/**
* Manage a beforeUnloadEvent
* @param {BeforeUnloadEvent} e
*/
function confirmExit(e) {
if (unsavedChanges) {
const url = pageurl + '/removeeditby';
console.log('send quit editing')
fetch(url, { method: 'POST' })
.then(handleErrors)
.then((response) => {
console.log(response);
setTimeout(() => {
myWorker.postMessage({ type: 'stillEditing' });
}, 1500);
});
return 'You have unsaved changes, do you really want to leave this page?';
} else {
myWorker.postMessage({ type: 'quitEditing' });
}
}
async function handleErrors(response) {
if (!response.ok) {
const data = await response.json();
throw Error(`${response.statusText}. ${data.message}`);
}
return response.json();
}
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