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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 {
Action,
action,
MainToRendererIpcMessage,
RendererToMainIpcMessage,
sharedStore,
SharedStoreListener,
SophieRenderer,
} from '@sophie/shared';
import { ipcRenderer } from 'electron';
import log from 'loglevel';
import type { IJsonPatch } from 'mobx-state-tree';
class SharedStoreConnector {
private onSharedStoreChangeCalled = false;
private listener: SharedStoreListener | null = null;
constructor(private readonly allowReplaceListener: boolean) {
ipcRenderer.on(MainToRendererIpcMessage.SharedStorePatch, (_event, patch) => {
try {
// `mobx-state-tree` will validate the patch, so we can safely cast here.
this.listener?.onPatch(patch as IJsonPatch);
} catch (err) {
log.error('Shared store listener onPatch failed', err);
this.listener = null;
}
});
}
async onSharedStoreChange(listener: SharedStoreListener): Promise<void> {
if (this.onSharedStoreChangeCalled && !this.allowReplaceListener) {
throw new Error('Shared store change listener was already set');
}
this.onSharedStoreChangeCalled = true;
let success = false;
let snapshot: unknown | null = null;
try {
snapshot = await ipcRenderer.invoke(RendererToMainIpcMessage.GetSharedStoreSnapshot);
success = true;
} catch (err) {
log.error('Failed to get initial shared store snapshot', err);
}
if (success) {
if (sharedStore.is(snapshot)) {
listener.onSnapshot(snapshot);
this.listener = listener;
return;
}
log.error('Got invalid initial shared store snapshot', snapshot);
}
throw new Error('Failed to connect to shared store');
}
}
function 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 {
ipcRenderer.send(RendererToMainIpcMessage.DispatchAction, parsedAction);
} catch (err) {
// Do not leak IPC failure details into the main world.
const message = 'Failed to dispatch action';
log.error(message, actionToDispatch, err);
throw new Error(message);
}
}
export default function createSophieRenderer(allowReplaceListener: boolean): SophieRenderer {
const connector = new SharedStoreConnector(allowReplaceListener);
return {
onSharedStoreChange: connector.onSharedStoreChange.bind(connector),
dispatchAction,
};
}
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