mirror of
https://github.com/misskey-dev/misskey
synced 2024-05-11 05:52:10 +02:00
273 lines
9 KiB
TypeScript
273 lines
9 KiB
TypeScript
// PIZZAX --- A lightweight store
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import { onUnmounted, Ref, ref, watch } from 'vue';
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import { BroadcastChannel } from 'broadcast-channel';
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import { $i } from './account';
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import { api } from './os';
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import { get, set } from './scripts/idb-proxy';
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import { defaultStore } from './store';
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import { stream } from './stream';
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import { deepClone } from './scripts/clone';
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type StateDef = Record<string, {
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where: 'account' | 'device' | 'deviceAccount';
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default: any;
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}>;
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type State<T extends StateDef> = { [K in keyof T]: T[K]['default']; };
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type ReactiveState<T extends StateDef> = { [K in keyof T]: Ref<T[K]['default']>; };
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type ArrayElement<A> = A extends readonly (infer T)[] ? T : never;
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type PizzaxChannelMessage<T extends StateDef> = {
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where: 'device' | 'deviceAccount';
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key: keyof T;
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value: T[keyof T]['default'];
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userId?: string;
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};
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const connection = $i && stream.useChannel('main');
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export class Storage<T extends StateDef> {
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public readonly ready: Promise<void>;
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public readonly loaded: Promise<void>;
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public readonly key: string;
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public readonly deviceStateKeyName: `pizzax::${this['key']}`;
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public readonly deviceAccountStateKeyName: `pizzax::${this['key']}::${string}` | '';
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public readonly registryCacheKeyName: `pizzax::${this['key']}::cache::${string}` | '';
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public readonly def: T;
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// TODO: これが実装されたらreadonlyにしたい: https://github.com/microsoft/TypeScript/issues/37487
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public readonly state: State<T>;
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public readonly reactiveState: ReactiveState<T>;
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private pizzaxChannel: BroadcastChannel<PizzaxChannelMessage<T>>;
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// 簡易的にキューイングして占有ロックとする
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private currentIdbJob: Promise<any> = Promise.resolve();
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private addIdbSetJob<T>(job: () => Promise<T>) {
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const promise = this.currentIdbJob.then(job, err => {
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console.error('Pizzax failed to save data to idb!', err);
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return job();
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});
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this.currentIdbJob = promise;
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return promise;
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}
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constructor(key: string, def: T) {
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this.key = key;
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this.deviceStateKeyName = `pizzax::${key}`;
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this.deviceAccountStateKeyName = $i ? `pizzax::${key}::${$i.id}` : '';
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this.registryCacheKeyName = $i ? `pizzax::${key}::cache::${$i.id}` : '';
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this.def = def;
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this.pizzaxChannel = new BroadcastChannel(`pizzax::${key}`);
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this.state = {} as State<T>;
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this.reactiveState = {} as ReactiveState<T>;
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for (const [k, v] of Object.entries(def) as [keyof T, T[keyof T]['default']][]) {
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this.state[k] = v.default;
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this.reactiveState[k] = ref(v.default);
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}
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this.ready = this.init();
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this.loaded = this.ready.then(() => this.load());
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}
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private async init(): Promise<void> {
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await this.migrate();
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const deviceState: State<T> = await get(this.deviceStateKeyName) || {};
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const deviceAccountState = $i ? await get(this.deviceAccountStateKeyName) || {} : {};
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const registryCache = $i ? await get(this.registryCacheKeyName) || {} : {};
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for (const [k, v] of Object.entries(this.def) as [keyof T, T[keyof T]['default']][]) {
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if (v.where === 'device' && Object.prototype.hasOwnProperty.call(deviceState, k)) {
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this.reactiveState[k].value = this.state[k] = deviceState[k];
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} else if (v.where === 'account' && $i && Object.prototype.hasOwnProperty.call(registryCache, k)) {
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this.reactiveState[k].value = this.state[k] = registryCache[k];
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} else if (v.where === 'deviceAccount' && Object.prototype.hasOwnProperty.call(deviceAccountState, k)) {
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this.reactiveState[k].value = this.state[k] = deviceAccountState[k];
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} else {
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this.reactiveState[k].value = this.state[k] = v.default;
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if (_DEV_) console.log('Use default value', k, v.default);
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}
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}
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this.pizzaxChannel.addEventListener('message', ({ where, key, value, userId }) => {
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// アカウント変更すればunisonReloadが効くため、このreturnが発火することは
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// まずないと思うけど一応弾いておく
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if (where === 'deviceAccount' && !($i && userId !== $i.id)) return;
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this.reactiveState[key].value = this.state[key] = value;
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});
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if ($i) {
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// streamingのuser storage updateイベントを監視して更新
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connection?.on('registryUpdated', ({ scope, key, value }: { scope?: string[], key: keyof T, value: T[typeof key]['default'] }) => {
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if (!scope || scope.length !== 2 || scope[0] !== 'client' || scope[1] !== this.key || this.state[key] === value) return;
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this.reactiveState[key].value = this.state[key] = value;
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this.addIdbSetJob(async () => {
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const cache = await get(this.registryCacheKeyName);
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if (cache[key] !== value) {
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cache[key] = value;
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await set(this.registryCacheKeyName, cache);
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}
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});
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});
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}
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}
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private load(): Promise<void> {
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return new Promise((resolve, reject) => {
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if ($i) {
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// api関数と循環参照なので一応setTimeoutしておく
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window.setTimeout(async () => {
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await defaultStore.ready;
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api('i/registry/get-all', { scope: ['client', this.key] })
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.then(kvs => {
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const cache: Partial<T> = {};
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for (const [k, v] of Object.entries(this.def) as [keyof T, T[keyof T]['default']][]) {
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if (v.where === 'account') {
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if (Object.prototype.hasOwnProperty.call(kvs, k)) {
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this.reactiveState[k].value = this.state[k] = (kvs as Partial<T>)[k];
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cache[k] = (kvs as Partial<T>)[k];
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} else {
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this.reactiveState[k].value = this.state[k] = v.default;
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}
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}
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}
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return set(this.registryCacheKeyName, cache);
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})
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.then(() => resolve());
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}, 1);
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} else {
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resolve();
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}
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});
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}
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public set<K extends keyof T>(key: K, value: T[K]['default']): Promise<void> {
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// IndexedDBやBroadcastChannelで扱うために単純なオブジェクトにする
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// (JSON.parse(JSON.stringify(value))の代わり)
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const rawValue = deepClone(value);
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if (_DEV_) console.log('set', key, rawValue, value);
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this.reactiveState[key].value = this.state[key] = rawValue;
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return this.addIdbSetJob(async () => {
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if (_DEV_) console.log(`set ${key} start`);
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switch (this.def[key].where) {
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case 'device': {
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this.pizzaxChannel.postMessage({
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where: 'device',
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key,
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value: rawValue,
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});
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const deviceState = await get(this.deviceStateKeyName) || {};
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deviceState[key] = rawValue;
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await set(this.deviceStateKeyName, deviceState);
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break;
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}
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case 'deviceAccount': {
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if ($i == null) break;
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this.pizzaxChannel.postMessage({
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where: 'deviceAccount',
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key,
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value: rawValue,
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userId: $i.id,
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});
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const deviceAccountState = await get(this.deviceAccountStateKeyName) || {};
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deviceAccountState[key] = rawValue;
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await set(this.deviceAccountStateKeyName, deviceAccountState);
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break;
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}
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case 'account': {
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if ($i == null) break;
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const cache = await get(this.registryCacheKeyName) || {};
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cache[key] = rawValue;
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await set(this.registryCacheKeyName, cache);
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await api('i/registry/set', {
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scope: ['client', this.key],
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key: key.toString(),
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value: rawValue,
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});
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break;
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}
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}
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if (_DEV_) console.log(`set ${key} complete`);
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});
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}
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public push<K extends keyof T>(key: K, value: ArrayElement<T[K]['default']>): void {
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const currentState = this.state[key];
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this.set(key, [...currentState, value]);
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}
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public reset(key: keyof T) {
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this.set(key, this.def[key].default);
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return this.def[key].default;
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}
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/**
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* 特定のキーの、簡易的なgetter/setterを作ります
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* 主にvue場で設定コントロールのmodelとして使う用
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*/
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public makeGetterSetter<K extends keyof T>(key: K, getter?: (v: T[K]) => unknown, setter?: (v: unknown) => T[K]) {
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const valueRef = ref(this.state[key]);
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const stop = watch(this.reactiveState[key], val => {
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valueRef.value = val;
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});
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// NOTE: vueコンポーネント内で呼ばれない限りは、onUnmounted は無意味なのでメモリリークする
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onUnmounted(() => {
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stop();
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});
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// TODO: VueのcustomRef使うと良い感じになるかも
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return {
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get: () => {
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if (getter) {
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return getter(valueRef.value);
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} else {
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return valueRef.value;
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}
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},
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set: (value: unknown) => {
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const val = setter ? setter(value) : value;
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this.set(key, val);
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valueRef.value = val;
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},
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};
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}
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// localStorage => indexedDBのマイグレーション
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private async migrate() {
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const deviceState = localStorage.getItem(this.deviceStateKeyName);
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if (deviceState) {
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await set(this.deviceStateKeyName, JSON.parse(deviceState));
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localStorage.removeItem(this.deviceStateKeyName);
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}
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const deviceAccountState = $i && localStorage.getItem(this.deviceAccountStateKeyName);
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if ($i && deviceAccountState) {
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await set(this.deviceAccountStateKeyName, JSON.parse(deviceAccountState));
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localStorage.removeItem(this.deviceAccountStateKeyName);
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}
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const registryCache = $i && localStorage.getItem(this.registryCacheKeyName);
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if ($i && registryCache) {
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await set(this.registryCacheKeyName, JSON.parse(registryCache));
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localStorage.removeItem(this.registryCacheKeyName);
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}
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}
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}
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