@ribajs/core
Version:
Core module of Riba.js
63 lines • 4.53 kB
JavaScript
export class Data {
attributes;
change;
constructor(attributes) {
this.attributes = attributes || {};
this.change = {};
}
on(key, callback) {
if (this.hasCallback(key, callback)) {
return;
}
this.change[key] = this.change[key] || [];
this.change[key].push(callback);
}
hasCallback(key, callback) {
return this.indexOf(this.change[key], callback) !== -1;
}
off(key, callback) {
const index = this.indexOf(this.change[key], callback);
if (index !== -1) {
this.change[key].splice(index, 1);
}
}
set(attributes) {
let old;
let key;
for (key in attributes) {
if (this.attributes[key]) {
old = this.attributes[key];
this.attributes[key] = attributes[key];
if (this.get(key) !== old) {
this.alertCallbacks(key);
}
}
}
}
get(key) {
return this.attributes[key];
}
alertCallbacks(key) {
if (!this.change[key]) {
return;
}
for (const i in this.change[key]) {
if (this.change[key][i]) {
this.change[key][i].sync();
}
}
}
indexOf(array, value) {
array = array || [];
if (array.indexOf) {
return array.indexOf(value);
}
for (let i = 0; i < array.length; i++) {
if (array[i] === value) {
return i;
}
}
return -1;
}
}
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