Refactored out websocket api and state stuff

common/sprinklers/schema/list.ts

@@ -2,7 +2,7 @@ import { primitive, PropSchema } from "serializr";
 
 function invariant(cond: boolean, message?: string) {
     if (!cond) {
-        throw new Error("[serializr] " + (message || "Illegal State"));
+        throw new Error("[serializr] " + (message || "Illegal ServerState"));
     }
 }
 

server/app/index.ts

@@ -2,19 +2,21 @@ import * as express from "express";
 
 import * as schema from "@common/sprinklers/schema";
 import {serialize} from "serializr";
-import {state} from "../state";
+import { ServerState } from "../state";
 import logger from "./logger";
 import serveApp from "./serveApp";
 
-const app = express();
+export function createApp(state: ServerState) {
+    const app = express();
 
-app.use(logger);
+    app.use(logger);
 
-app.get("/api/grinklers", (req, res) => {
-    const j = serialize(schema.sprinklersDevice, state.device);
-    res.send(j);
-});
+    app.get("/api/grinklers", (req, res) => {
+        const j = serialize(schema.sprinklersDevice, state.device);
+        res.send(j);
+    });
 
-serveApp(app);
+    serveApp(app);
 
-export default app;
+    return app;
+}

server/index.ts

@@ -7,17 +7,20 @@ import log from "@common/logger";
 import {Server} from "http";
 import * as WebSocket from "ws";
 
-import app from "./app";
-import {state} from "./state";
-import {handler as webSocketHandler} from "./websocket";
+import { ServerState } from "./state";
+import { createApp } from "./app";
+import { WebSocketApi } from "./websocket";
+
+const state = new ServerState();
+const app = createApp(state);
+const webSocketApi = new WebSocketApi(state);
 
 const port = +(process.env.PORT || 8080);
 const host = process.env.HOST || "0.0.0.0";
 
 const server = new Server(app);
 const webSocketServer = new WebSocket.Server({server});
-
-webSocketServer.on("connection", webSocketHandler);
+webSocketServer.on("connection", webSocketApi.handleConnection);
 
 state.start();
 server.listen(port, host, () => {

server/state.ts

@@ -1,7 +1,7 @@
 import {SprinklersDevice} from "@common/sprinklers";
 import * as mqtt from "@common/sprinklers/mqtt";
 
-export class State {
+export class ServerState {
     mqttClient!: mqtt.MqttApiClient;
     device!: SprinklersDevice;
 
@@ -15,6 +15,4 @@ export class State {
 
         this.mqttClient.start();
     }
-}
-
-export const state: State = new State();
+}

server/websocket/index.ts

@@ -1,61 +1,43 @@
-import { autorun } from "mobx";
-import { serialize } from "serializr";
-import * as WebSocket from "ws";
-
 import log from "@common/logger";
 import * as requests from "@common/sprinklers/requests";
 import * as schema from "@common/sprinklers/schema";
 import * as ws from "@common/sprinklers/websocketData";
+import { autorun } from "mobx";
+import { serialize } from "serializr";
+import * as WebSocket from "ws";
+import { ServerState } from "../state";
 
-import { state } from "../state";
+export class WebSocketApi {
+    state: ServerState;
 
-async function doDeviceCallRequest(requestData: ws.IDeviceCallRequest) {
-    const { deviceName, data } = requestData;
-    if (deviceName !== "grinklers") {
-        // error handling? or just get the right device
-        return false;
+    constructor(state: ServerState) {
+        this.state = state;
     }
-    const request = schema.requests.deserializeRequest(data);
-    return state.device.makeRequest(request);
-}
 
-async function deviceCallRequest(socket: WebSocket, data: ws.IDeviceCallRequest): Promise<void> {
-    let response: requests.Response | false;
-    try {
-        response = await doDeviceCallRequest(data);
-    } catch (err) {
-        response = err;
-    }
-    if (response) {
-        const resData: ws.IDeviceCallResponse = {
-            type: "deviceCallResponse",
-            id: data.id,
-            data: response,
+    handleConnection = (socket: WebSocket) => {
+        const disposers = [
+            autorun(() => {
+                const json = serialize(schema.sprinklersDevice, this.state.device);
+                log.trace({ device: json });
+                const data: ws.IDeviceUpdate = { type: "deviceUpdate", name: "grinklers", data: json };
+                socket.send(JSON.stringify(data));
+            }, { delay: 100 }),
+            autorun(() => {
+                const data: ws.IBrokerConnectionUpdate  = {
+                    type: "brokerConnectionUpdate",
+                    brokerConnected: this.state.mqttClient.connected,
+                };
+                socket.send(JSON.stringify(data));
+            }),
+        ];
+        const stop = () => {
+            disposers.forEach((disposer) => disposer());
         };
-        socket.send(JSON.stringify(resData));
+        socket.on("message", this.handleSocketMessage);
+        socket.on("close", () => stop());
     }
-}
 
-export function handler(socket: WebSocket) {
-    const disposers = [
-        autorun(() => {
-            const json = serialize(schema.sprinklersDevice, state.device);
-            log.trace({ device: json });
-            const data: ws.IDeviceUpdate = { type: "deviceUpdate", name: "grinklers", data: json };
-            socket.send(JSON.stringify(data));
-        }, { delay: 100 }),
-        autorun(() => {
-            const data: ws.IBrokerConnectionUpdate  = {
-                type: "brokerConnectionUpdate",
-                brokerConnected: state.mqttClient.connected,
-            };
-            socket.send(JSON.stringify(data));
-        }),
-    ];
-    const stop = () => {
-        disposers.forEach((disposer) => disposer());
-    };
-    socket.on("message", (socketData: WebSocket.Data) => {
+    private handleSocketMessage = (socket: WebSocket, socketData: WebSocket.Data) => {
         if (typeof socketData !== "string") {
             return log.error({ type: typeof socketData }, "received invalid socket data type from client");
         }
@@ -67,11 +49,37 @@ export function handler(socket: WebSocket) {
         }
         switch (data.type) {
             case "deviceCallRequest":
-                deviceCallRequest(socket, data);
+                this.deviceCallRequest(socket, data);
                 break;
             default:
                 return log.warn({ data }, "received invalid client message type");
         }
-    });
-    socket.on("close", () => stop());
+    }
+
+    private async deviceCallRequest(socket: WebSocket, data: ws.IDeviceCallRequest): Promise<void> {
+        let response: requests.Response | false;
+        try {
+            response = await this.doDeviceCallRequest(data);
+        } catch (err) {
+            response = err;
+        }
+        if (response) {
+            const resData: ws.IDeviceCallResponse = {
+                type: "deviceCallResponse",
+                id: data.id,
+                data: response,
+            };
+            socket.send(JSON.stringify(resData));
+        }
+    }
+
+    private async doDeviceCallRequest(requestData: ws.IDeviceCallRequest): Promise<requests.Response | false> {
+        const { deviceName, data } = requestData;
+        if (deviceName !== "grinklers") {
+            // error handling? or just get the right device
+            return false;
+        }
+        const request = schema.requests.deserializeRequest(data);
+        return this.state.device.makeRequest(request);
+    }
 }