add homebridge plugin

src/widgets/homebridge/proxy.js

@@ -0,0 +1,101 @@
+import cache from "memory-cache";
+
+import { httpProxy } from "utils/proxy/http";
+import { formatApiCall } from "utils/proxy/api-helpers";
+import getServiceWidget from "utils/config/service-helpers";
+import createLogger from "utils/logger";
+import widgets from "widgets/widgets";
+
+const proxyName = "homebridgeProxyHandler";
+const sessionTokenCacheKey = `${proxyName}__sessionToken`;
+const logger = createLogger(proxyName);
+
+async function login(widget) {
+  const endpoint = "auth/login";
+  const api = widgets?.[widget.type]?.api
+  const loginUrl = new URL(formatApiCall(api, { endpoint, ...widget }));
+  const loginBody = { username: widget.username, password: widget.password };
+  const headers = { "Content-Type": "application/json" };
+  const [status, contentType, data, responseHeaders] = await httpProxy(loginUrl, {
+    method: "POST",
+    body: JSON.stringify(loginBody),
+    headers,
+  });
+
+  const dataParsed = JSON.parse(data.toString())
+
+  cache.put(sessionTokenCacheKey, dataParsed.access_token);
+
+  return { status, contentType, data: dataParsed, responseHeaders };
+}
+
+async function apiCall(widget, endpoint) {
+  const headers = {
+    "content-type": "application/json",
+    "Authorization": `Bearer ${cache.get(sessionTokenCacheKey)}`,
+  }
+
+  const url = new URL(formatApiCall(widgets[widget.type].api, { endpoint, ...widget }));
+  const method = "GET";
+
+  let [status, contentType, data, responseHeaders] = await httpProxy(url, {
+    method,
+    headers,
+  });
+
+  if (status === 401) {
+    logger.debug("Homebridge is rejecting the request, but obtaining new session token");
+    const { data: loginData } = login(widget);
+    headers.Authorization = loginData?.auth_token;
+
+    // retry the request, now with the new session token
+    [status, contentType, data, responseHeaders] = await httpProxy(url, {
+      method,
+      headers,
+    });
+  }
+
+  if (status !== 200) {
+    logger.error("Error getting data from Homebridge: %d.  Data: %s", status, data);
+  }
+
+  return { status, contentType, data: JSON.parse(data.toString()), responseHeaders };
+}
+
+function formatPluginsResponse(plugins) {
+  const quantity = plugins?.data.filter(p => p.updateAvailable).length;
+  return {
+    updatesAvailable: quantity > 0,
+    quantity,
+  }
+}
+
+export default async function homebridgeProxyHandler(req, res) {
+  const { group, service } = req.query;
+
+  if (!group || !service) {
+    logger.debug("Invalid or missing service '%s' or group '%s'", service, group);
+    return res.status(400).json({ error: "Invalid proxy service type" });
+  }
+
+  const widget = await getServiceWidget(group, service);
+
+  if (!widget) {
+    logger.debug("Invalid or missing widget for service '%s' in group '%s'", service, group);
+    return res.status(400).json({ error: "Invalid proxy service type" });
+  }
+
+  await login(widget);
+
+  const statusRS = await apiCall(widget, "status/homebridge");
+  const versionRS = await apiCall(widget, "status/homebridge-version");
+  const pluginsRS = await apiCall(widget, "plugins");
+
+  return res.status(200).send({
+    data: {
+      status: statusRS?.data?.status,
+      updateAvailable: versionRS?.data?.updateAvailable,
+      plugins: formatPluginsResponse(pluginsRS)
+    }
+  });
+}