waffle/frontend/src/stores.js

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import { writable } from "svelte/store";
import gateway, { GatewayEventType } from "./gateway";
class Store {
constructor() {
this._handlers = [];
}
subscribe(handler) {
const newLength = this._handlers.push(handler);
const handlerIndex = newLength - 1;
handler(this.value);
return () => {
this._handlers.splice(handlerIndex, 1);
};
}
updated() {
this._handlers.forEach(e => {
e(this.value);
});
}
}
class ChannelsStore extends Store {
constructor() {
super();
this.value = gateway.channels || [];
gateway.subscribe(GatewayEventType.Ready, ({ channels }) => {
this.value = channels;
this.updated();
});
gateway.subscribe(GatewayEventType.ChannelCreate, (channel) => {
this.value.push(channel);
this.updated();
});
gateway.subscribe(GatewayEventType.ChannelDelete, ({ id }) => {
const index = this.value.findIndex(e => e.id === id);
if (index === -1)
return;
this.value.splice(index, 1);
this.updated();
});
gateway.subscribe(GatewayEventType.ChannelUpdate, (data) => {
const index = this.value.findIndex(e => e.id === data.id);
if (index === -1)
return;
if (!this.value[index])
return;
this.value[index] = data;
this.updated();
});
}
}
class GatewayStatusStore extends Store {
constructor() {
super();
this.value = { open: gateway.open, ready: gateway.authenticated };
gateway.subscribe(GatewayEventType.Open, () => {
this.value.open = true;
this.updated();
});
gateway.subscribe(GatewayEventType.Close, () => {
this.value.open = false;
this.value.ready = false;
this.updated();
});
gateway.subscribe(GatewayEventType.Ready, () => {
this.value.ready = true;
this.updated();
});
}
}
export const channels = new ChannelsStore();
export const gatewayStatus = new GatewayStatusStore();
export const selectedChannel = writable({ id: -1, name: "none", creator_id: -1 });