Remove node-unifi package dependency

- Add custom Unifi proxy built on existing cookie jar and httpProxy
- Change formatApiCall to emit empty string instead of undefined on missing key

src/widgets/unifi/proxy.js

@@ -0,0 +1,103 @@
+import { formatApiCall } from "utils/proxy/api-helpers";
+import { httpProxy } from "utils/proxy/http";
+import { addCookieToJar, setCookieHeader } from "utils/proxy/cookie-jar";
+import { getSettings } from "utils/config/config";
+import getServiceWidget from "utils/config/service-helpers";
+import createLogger from "utils/logger";
+import widgets from "widgets/widgets";
+
+const logger = createLogger("unifiProxyHandler");
+
+async function getWidget(req) {
+  const { group, service, type } = req.query;
+
+  let widget = null;
+  if (type === 'unifi_console') {
+    const settings = getSettings();
+    widget = settings.unifi_console;
+    if (!widget) {
+      logger.debug("There is no unifi_console section in settings.yaml");
+      return null;
+    }
+    widget.type = "unifi";
+  } else {
+    if (!group || !service) {
+      logger.debug("Invalid or missing service '%s' or group '%s'", service, group);
+      return null;
+    }
+  
+    widget = await getServiceWidget(group, service);
+
+    if (!widget) {
+      logger.debug("Invalid or missing widget for service '%s' in group '%s'", service, group);
+      return null;
+    }
+  }
+
+  return widget;
+}
+
+async function login(widget) {
+  logger.debug("Unifi isn't logged in or is rejecting the reqeust, logging in.");
+
+  const loginBody = { username: widget.username, password: widget.password, remember: true };
+  let loginUrl = `${widget.url}/api`;
+  if (widget.version === "udm-pro") {
+    loginUrl += "/auth"
+  }
+  loginUrl += "/login";
+
+  const loginParams = { method: "POST", body: JSON.stringify(loginBody) };
+  const [status, contentType, data, responseHeaders] = await httpProxy(loginUrl, loginParams);
+  return [status, contentType, data, responseHeaders];
+}
+
+export default async function unifiProxyHandler(req, res) {
+  const widget = await getWidget(req);
+  if (!widget) {
+    return res.status(400).json({ error: "Invalid proxy service type" });
+  }
+
+  const api = widgets?.[widget.type]?.api;
+  if (!api) {
+    return res.status(403).json({ error: "Service does not support API calls" });
+  }
+
+  widget.prefx = "";
+  if (widget.version === "udm-pro") {
+    widget.prefix = "/proxy/network"
+  }
+
+  const { endpoint } = req.query;
+  const url = new URL(formatApiCall(api, { endpoint, ...widget }));
+  const params = { method: "GET", headers: {} };
+  setCookieHeader(url, params);
+
+  let [status, contentType, data, responseHeaders] = await httpProxy(url, params);
+  if (status === 401) {
+    [status, contentType, data, responseHeaders] = await login(widget);
+
+    if (status !== 200) {
+      logger.error("HTTP %d logging in to Unifi.  Data: %s", status, data);
+      return res.status(status).end(data);
+    }
+
+    const json = JSON.parse(data.toString());
+    if (json?.meta?.rc !== "ok") {
+      logger.error("Error logging in to Unifi: Data: %s", data);
+      return res.status(401).end(data);
+    }
+
+    addCookieToJar(url, responseHeaders);
+    setCookieHeader(url, params);
+  }
+
+  [status, contentType, data] = await httpProxy(url, params);
+
+  if (status !== 200) {
+    logger.error("HTTP %d getting data from Unifi.  Data: %s", status, data);
+  }
+
+  if (contentType) res.setHeader("Content-Type", contentType);
+  return res.status(status).send(data);
+}