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/*
* Copyright (C) 2021-2022 Kristóf Marussy <kristof@marussy.com>
*
* This file is part of Sophie.
*
* Sophie is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: AGPL-3.0-only
*/
import type { IJsonPatch } from 'mobx-state-tree';
import {
Action,
action,
sharedStore,
SharedStoreListener,
SophieRenderer,
} from '@sophie/shared';
import { RendererToMainIpcService } from '../services/RendererToMainIpcService';
class SophieRendererImpl implements SophieRenderer {
readonly #ipcService: RendererToMainIpcService;
#onSharedStoreChangeCalled = false;
#listener: SharedStoreListener | null = null;
constructor(ipcService: RendererToMainIpcService) {
this.#ipcService = ipcService;
ipcService.onSharedStorePatch((patch) => {
try {
// `mobx-state-tree` will validate the patch, so we can safely cast here.
this.#listener?.onPatch(patch as IJsonPatch);
} catch (err) {
console.log('Shared store listener onPatch failed', err);
}
});
}
async #setSharedStoreChangeListener(listener: SharedStoreListener): Promise<void> {
let snapshot: unknown;
try {
snapshot = await this.#ipcService.getSharedStoreSnapshot();
} catch (err) {
console.error('Failed to get initial shared store snapshot', err);
return;
}
if (sharedStore.is(snapshot)) {
try {
listener.onSnapshot(snapshot);
} catch (err) {
console.error('Shared store listener onSnapshot failed', err);
return;
}
this.#listener = listener;
return;
}
console.error('Got invalid initial shared store snapshot', snapshot);
}
onSharedStoreChange(listener: SharedStoreListener): void {
if (this.#onSharedStoreChangeCalled) {
throw new Error('Shared store change listener was already set');
}
this.#setSharedStoreChangeListener(listener).catch((err) => {
console.log('Failed to set shared store change listener', err);
});
}
dispatchAction(actionToDispatch: Action): void {
// Let the full zod parse error bubble up to the main world,
// since all data it may contain was provided from the main world.
const parsedAction = action.parse(actionToDispatch);
try {
this.#ipcService.dispatchAction(parsedAction);
} catch (err) {
// Do not leak IPC failure details into the main world.
const message = 'Failed to dispatch action';
console.error(message, actionToDispatch, err);
throw new Error(message);
}
}
}
export function createSophieRenderer(ipcService: RendererToMainIpcService): SophieRenderer {
const impl = new SophieRendererImpl(ipcService);
return {
onSharedStoreChange: impl.onSharedStoreChange.bind(impl),
dispatchAction: impl.dispatchAction.bind(impl),
};
}
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