feat: add homeassistant integration (#578)

packages/api/src/router/widgets/smart-home.ts

@@ -0,0 +1,38 @@
+import { observable } from "@trpc/server/observable";
+
+import { HomeAssistantIntegration } from "@homarr/integrations";
+import { homeAssistantEntityState } from "@homarr/redis";
+import { z } from "@homarr/validation";
+
+import { createOneIntegrationMiddleware } from "../../middlewares/integration";
+import { createTRPCRouter, publicProcedure } from "../../trpc";
+
+export const smartHomeRouter = createTRPCRouter({
+  subscribeEntityState: publicProcedure.input(z.object({ entityId: z.string() })).subscription(({ input }) => {
+    return observable<{
+      entityId: string;
+      state: string;
+    }>((emit) => {
+      homeAssistantEntityState.subscribe((message) => {
+        if (message.entityId !== input.entityId) {
+          return;
+        }
+        emit.next(message);
+      });
+    });
+  }),
+  switchEntity: publicProcedure
+    .unstable_concat(createOneIntegrationMiddleware("homeAssistant"))
+    .input(z.object({ entityId: z.string() }))
+    .mutation(async ({ ctx, input }) => {
+      const client = new HomeAssistantIntegration(ctx.integration);
+      return await client.triggerToggleAsync(input.entityId);
+    }),
+  executeAutomation: publicProcedure
+    .unstable_concat(createOneIntegrationMiddleware("homeAssistant"))
+    .input(z.object({ automationId: z.string() }))
+    .mutation(async ({ input, ctx }) => {
+      const client = new HomeAssistantIntegration(ctx.integration);
+      await client.triggerAutomationAsync(input.automationId);
+    }),
+});