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56 lines
1.5 KiB
56 lines
1.5 KiB
import * as dispose from 'app/client/lib/dispose';
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import {Storage} from 'app/plugin/StorageAPI';
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import {checkers} from 'app/plugin/TypeCheckers';
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import {Rpc} from 'grain-rpc';
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/**
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* Implementation of interfaces whose lifetime is that of the client.
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*/
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export class ClientScope extends dispose.Disposable {
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private _pluginStorage = new Map<string, Storage>();
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public create() {
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// nothing to do
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}
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/**
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* Make interfaces available for a plugin with a given name. Implementations
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* are attached directly to the supplied rpc object.
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*/
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public servePlugin(pluginId: string, rpc: Rpc) {
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// We have just one interface right now, storage. We want to keep ownership
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// of storage, so it doesn't go away when the plugin is closed. So we cache
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// it.
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let storage = this._pluginStorage.get(pluginId);
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if (!storage) {
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storage = this._implementStorage();
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this._pluginStorage.set(pluginId, storage);
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}
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rpc.registerImpl<Storage>("storage", storage, checkers.Storage);
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}
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/**
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* Create an implementation of the Storage interface.
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*/
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private _implementStorage(): Storage {
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const data = new Map<string, any>();
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return {
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getItem(key: string): any {
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return data.get(key);
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},
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hasItem(key: string): boolean {
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return data.has(key);
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},
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setItem(key: string, value: any) {
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data.set(key, value);
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},
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removeItem(key: string) {
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data.delete(key);
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},
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clear() {
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data.clear();
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},
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};
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}
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}
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