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import { ipcRenderer } from 'electron';
import type { IJsonPatch } from 'mobx-state-tree';
import {
MainToRendererIpcMessage,
RendererToMainIpcMessage,
sharedStore,
SharedStoreListener,
SharedStoreSnapshotIn,
SophieRenderer
} from '@sophie/shared';
export type MessageSender = (channel: RendererToMainIpcMessage, ...args: unknown[]) => void;
export class SophieRendererImpl implements SophieRenderer {
readonly #send: MessageSender;
#listener: SharedStoreListener | null = null;
#snapshot: SharedStoreSnapshotIn | null = null;
constructor(send: MessageSender) {
this.#send = send;
}
sharedStoreSnapshotReceived(snapshot: unknown): void {
if (sharedStore.is(snapshot)) {
if (this.#listener === null) {
this.#snapshot = snapshot;
} else {
this.#listener.onSnapshot(snapshot);
}
} else {
console.error('Received invalid snapshot', snapshot);
this.#snapshot = null;
}
}
sharedStorePatchReceived(patch: unknown): void {
if (this.#listener !== null) {
// `mobx-state-tree` will validate the patch, so we can safely cast here.
this.#listener.onPatch(patch as IJsonPatch);
}
}
setSharedStoreListener(listener: SharedStoreListener): void {
this.#listener = listener;
if (this.#snapshot !== null) {
listener.onSnapshot(this.#snapshot);
this.#snapshot = null;
}
this.#send(RendererToMainIpcMessage.SharedStoreSnapshotRequest);
}
buttonClick(): void {
this.#send(RendererToMainIpcMessage.ButtonClick);
}
}
export function createSophieRenderer(): SophieRenderer {
const impl = new SophieRendererImpl(ipcRenderer.send);
ipcRenderer.on(MainToRendererIpcMessage.SharedStoreSnapshot, (_event, snapshot) => {
impl.sharedStoreSnapshotReceived(snapshot);
});
ipcRenderer.on(MainToRendererIpcMessage.SharedStorePatch, (_event, patch) => {
impl.sharedStorePatchReceived(patch);
});
return {
setSharedStoreListener: impl.setSharedStoreListener.bind(impl),
buttonClick: impl.buttonClick.bind(impl),
};
}
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