get channels api

src/http.ts

@@ -8,15 +8,42 @@ export default class HttpServer {
     private httpServer: http.Server;
     private port: number;
     private root: string;
-    public constructor(port: number, root: string, tune: (ch: string, adp?: number) => void) {
+    public constructor(port: number, root: string, tune: (ch: string, adp?: number) => void, getChannels: ()=>string[]) {
         this.port = port;
         this.root = root;
         this.httpServer = http.createServer((req, res) => {
             let status: number = 404;
-            let body: any;
+            let body: any = "";
             const url = new URL(req.url, `http://${req.headers.host}`);
             const pathname = path.normalize(url.pathname);
-            if (req.method === 'GET') {
+
+            if (pathname.startsWith('/api/')) {
+                const query = pathname.split('/');
+                const api = query[2];
+                switch (req.method) {
+                    case "GET":
+                        switch (api) {
+                            case "list":
+                                body = JSON.stringify(getChannels());
+                                status = 200;
+                                break;
+
+                        }
+                        break;
+                    case "PUT":
+                        switch (api) {
+                            case "tune":
+                                const channel = query[3];
+                                const adapter = parseInt(url.searchParams.get('adapter'));
+                                tune(channel, adapter);
+                                status = 202;
+                                break;
+     
+                        }
+
+                }
+            }
+            else if (req.method === 'GET') {
                 const filePath = path.join(root, path.extname(pathname) === '' ? pathname + "/index.html" : pathname);
                 try {
                     body = fs.readFileSync(filePath);
@@ -25,21 +52,6 @@ export default class HttpServer {
                 catch (err) {
                     body = "Invalid File"
                 }
-
-            }
-            else if (req.method === 'PUT' && pathname.startsWith('/api/')) {
-                const query = pathname.split('/');
-                const api = query[2];
-                switch (api) {
-                    case "channel":
-                        const channel = query[3];
-                        const adapter = parseInt(url.searchParams.get('adapter'));
-                        tune(channel, adapter);
-                        break;
-                    default:
-                        body = "Invalid API Endpoint"
-                        break;
-                }
             }
             else {
                 body = "Invalid Request"

src/server.ts

@@ -22,7 +22,10 @@ const tune = (reqChannel: string, reqAdapter?: number) => {
     });
 }
 
-const httpServer = new HttpServer(HTTP_PORT, STATIC_ROOT, tune);
+const getChannels = () =>
+    zap.getChannels();
+
+const httpServer = new HttpServer(HTTP_PORT, STATIC_ROOT, tune, getChannels);
 const tvWebSocket = new TVWebSocket(WS_PORT);
 httpServer.start();
 

src/zap.ts

@@ -33,7 +33,11 @@ export default class Zap {
 
     }
 
-    private nextChannel(channel: string) {
+    public getChannels(): string[] {
+        return this.channelNameList;
+    }
+
+    private nextChannel(channel: string) :string {
         const size = this.channelNameList.length;
         const currentIndex = this.channelNameList.indexOf(channel);
         if (currentIndex >= 0) {
@@ -44,11 +48,11 @@ export default class Zap {
         }
     }
 
-    private mod(n: number, m: number) {
+    private mod(n: number, m: number) :number{
         return ((n % m) + m) % m;
     }
 
-    private previousChannel(channel: string) {
+    private previousChannel(channel: string):string {
         const size = this.channelNameList.length;
         const currentIndex = this.channelNameList.indexOf(channel);
         if (currentIndex >= 0) {
@@ -65,7 +69,7 @@ export default class Zap {
             proc.once('exit', () =>
                 resolve()
             )
-            proc.on("error", (err:Error) =>
+            proc.on("error", (err: Error) =>
                 reject(err)
             );
         })