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/* eslint-disable no-param-reassign, consistent-return */
import AccessorUtilities from './lib/utils/accessor';
export default class Autosave {
constructor(field, key, fallbackKey, lockVersion) {
this.field = field;
this.isLocalStorageAvailable = AccessorUtilities.isLocalStorageAccessSafe();
if (key.join != null) {
key = key.join('/');
}
this.key = `autosave/${key}`;
this.fallbackKey = fallbackKey;
this.lockVersionKey = `${this.key}/lockVersion`;
this.lockVersion = lockVersion;
this.field.data('autosave', this);
this.restore();
this.field.on('input', () => this.save());
}
restore() {
if (!this.isLocalStorageAvailable) return;
if (!this.field.length) return;
const text = window.localStorage.getItem(this.key);
const fallbackText = window.localStorage.getItem(this.fallbackKey);
if (text) {
this.field.val(text);
} else if (fallbackText) {
this.field.val(fallbackText);
}
this.field.trigger('input');
// v-model does not update with jQuery trigger
// https://github.com/vuejs/vue/issues/2804#issuecomment-216968137
const event = new Event('change', { bubbles: true, cancelable: false });
const field = this.field.get(0);
if (field) {
field.dispatchEvent(event);
}
}
getSavedLockVersion() {
if (!this.isLocalStorageAvailable) return;
return window.localStorage.getItem(this.lockVersionKey);
}
save() {
if (!this.field.length) return;
const text = this.field.val();
if (this.isLocalStorageAvailable && text) {
if (this.fallbackKey) {
window.localStorage.setItem(this.fallbackKey, text);
}
if (this.lockVersion !== undefined) {
window.localStorage.setItem(this.lockVersionKey, this.lockVersion);
}
return window.localStorage.setItem(this.key, text);
}
return this.reset();
}
reset() {
if (!this.isLocalStorageAvailable) return;
window.localStorage.removeItem(this.lockVersionKey);
window.localStorage.removeItem(this.fallbackKey);
return window.localStorage.removeItem(this.key);
}
dispose() {
this.field.off('input');
}
}
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