vector-im-hydrogen-web/src/domain/SessionPickerViewModel.js

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import {SortedArray} from "../observable/index.js";
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import EventEmitter from "../EventEmitter.js";
class SessionItemViewModel extends EventEmitter {
constructor(sessionInfo, pickerVM) {
super();
this._pickerVM = pickerVM;
this._sessionInfo = sessionInfo;
this._isDeleting = false;
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this._isClearing = false;
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this._error = null;
this._showJSON = false;
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}
get error() {
return this._error && this._error.message;
}
async delete() {
this._isDeleting = true;
this.emit("change", "isDeleting");
try {
await this._pickerVM.delete(this.id);
} catch(err) {
this._error = err;
console.error(err);
this.emit("change", "error");
} finally {
this._isDeleting = false;
this.emit("change", "isDeleting");
}
}
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async clear() {
this._isClearing = true;
this._showJSON = true;
this.emit("change");
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try {
await this._pickerVM.clear(this.id);
} catch(err) {
this._error = err;
console.error(err);
this.emit("change", "error");
} finally {
this._isClearing = false;
this.emit("change", "isClearing");
}
}
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get isDeleting() {
return this._isDeleting;
}
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get isClearing() {
return this._isClearing;
}
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get id() {
return this._sessionInfo.id;
}
get userId() {
return this._sessionInfo.userId;
}
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get sessionInfo() {
return this._sessionInfo;
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}
get json() {
if (this._showJSON) {
return JSON.stringify(this._sessionInfo, undefined, 2);
}
return null;
}
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}
export default class SessionPickerViewModel {
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constructor({storageFactory, sessionStore, sessionCallback}) {
this._storageFactory = storageFactory;
this._sessionStore = sessionStore;
this._sessionCallback = sessionCallback;
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this._sessions = new SortedArray((s1, s2) => s1.id.localeCompare(s2.id));
}
async load() {
const sessions = await this._sessionStore.getAll();
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this._sessions.setManyUnsorted(sessions.map(s => new SessionItemViewModel(s, this)));
}
pick(id) {
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const sessionVM = this._sessions.array.find(s => s.id === id);
if (sessionVM) {
this._sessionCallback(sessionVM.sessionInfo);
}
}
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async import(json) {
const sessionInfo = JSON.parse(json);
const sessionId = (Math.floor(Math.random() * Number.MAX_SAFE_INTEGER)).toString();
sessionInfo.id = sessionId;
sessionInfo.lastUsed = sessionId;
await this._sessionStore.add(sessionInfo);
this._sessions.set(new SessionItemViewModel(sessionInfo, this));
}
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async delete(id) {
const idx = this._sessions.array.findIndex(s => s.id === id);
await this._sessionStore.delete(id);
await this._storageFactory.delete(id);
this._sessions.remove(idx);
}
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async clear(id) {
await this._storageFactory.delete(id);
}
get sessions() {
return this._sessions;
}
cancel() {
this._sessionCallback();
}
}