91 lines
2.4 KiB
JavaScript
91 lines
2.4 KiB
JavaScript
/* global deepEqual */// toolbox.js
|
|
/* global msg */
|
|
'use strict';
|
|
|
|
const router = {
|
|
buffer: [],
|
|
watchers: [],
|
|
|
|
getSearch(key) {
|
|
return new URLSearchParams(location.search).get(key);
|
|
},
|
|
|
|
update(replace) {
|
|
const {buffer} = router;
|
|
if (!buffer.length) {
|
|
buffer.push(location.href);
|
|
} else if (buffer[buffer.length - 1] === location.href) {
|
|
return;
|
|
} else if (replace) {
|
|
buffer[buffer.length - 1] = location.href;
|
|
} else if (buffer.length > 1 && buffer[buffer.length - 2] === location.href) {
|
|
buffer.pop();
|
|
} else {
|
|
buffer.push(location.href);
|
|
}
|
|
for (const {options, callback} of router.watchers) {
|
|
let state;
|
|
if (options.hash) {
|
|
state = options.hash === location.hash;
|
|
} else if (options.search) {
|
|
const search = new URLSearchParams(location.search);
|
|
state = options.search.map(key => search.get(key));
|
|
}
|
|
if (!deepEqual(state, options.currentState)) {
|
|
options.currentState = state;
|
|
callback(state);
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @param {string} hash - empty string removes the hash
|
|
*/
|
|
updateHash(hash) {
|
|
const {buffer} = router;
|
|
if (buffer.length > 1) {
|
|
if (!hash && !buffer[buffer.length - 2].includes('#') ||
|
|
hash && buffer[buffer.length - 2].endsWith(hash)) {
|
|
history.back();
|
|
return;
|
|
}
|
|
}
|
|
if (!hash) {
|
|
hash = ' ';
|
|
}
|
|
history.pushState(history.state, null, hash);
|
|
router.update();
|
|
},
|
|
|
|
updateSearch(key, value) {
|
|
const u = new URL(location);
|
|
u.searchParams[value ? 'set' : 'delete'](key, value);
|
|
history.replaceState(history.state, null, `${u}`);
|
|
router.update(true);
|
|
},
|
|
|
|
watch(options, callback) {
|
|
/* Watch search params or hash and get notified on change.
|
|
|
|
options: {search?: Array<key: String>, hash?: String}
|
|
callback: (Array<value: String | null> | Boolean) => void
|
|
|
|
`hash` should always start with '#'.
|
|
When watching search params, callback receives a list of values.
|
|
When watching hash, callback receives a boolean.
|
|
*/
|
|
router.watchers.push({options, callback});
|
|
},
|
|
};
|
|
|
|
document.on('DOMContentLoaded', () => router.update());
|
|
window.on('popstate', () => router.update());
|
|
window.on('hashchange', () => router.update());
|
|
msg.on(e => {
|
|
if (e.method === 'pushState' && e.url !== location.href) {
|
|
history.pushState(history.state, null, e.url);
|
|
router.update();
|
|
return true;
|
|
}
|
|
});
|