Add Deluge widget

- Create semi-generic jsonrpc proxy handler
- Refactor NZBGet to use jsonrpc proxy handler

closes #190

src/widgets/nzbget/proxy.js

@@ -1,40 +0,0 @@
-import { JSONRPCClient } from "json-rpc-2.0";
-
-import getServiceWidget from "utils/config/service-helpers";
-
-export default async function nzbgetProxyHandler(req, res) {
-  const { group, service, endpoint } = req.query;
-
-  if (group && service) {
-    const widget = await getServiceWidget(group, service);
-
-    if (widget) {
-      const constructedUrl = new URL(widget.url);
-      constructedUrl.pathname = "jsonrpc";
-
-      const authorization = Buffer.from(`${widget.username}:${widget.password}`).toString("base64");
-
-      const client = new JSONRPCClient((jsonRPCRequest) =>
-        fetch(constructedUrl.toString(), {
-          method: "POST",
-          headers: {
-            "content-type": "application/json",
-            authorization: `Basic ${authorization}`,
-          },
-          body: JSON.stringify(jsonRPCRequest),
-        }).then(async (response) => {
-          if (response.status === 200) {
-            const jsonRPCResponse = await response.json();
-            return client.receive(jsonRPCResponse);
-          }
-
-          return Promise.reject(new Error(response.statusText));
-        })
-      );
-
-      return res.send(await client.request(endpoint));
-    }
-  }
-
-  return res.status(400).json({ error: "Invalid proxy service type" });
-}

src/widgets/nzbget/widget.js

@@ -1,7 +1,8 @@
-import nzbgetProxyHandler from "./proxy";
+import jsonrpcProxyHandler from "utils/proxy/handlers/jsonrpc";
 
 const widget = {
-  proxyHandler: nzbgetProxyHandler,
+  api: "{url}/jsonrpc",
+  proxyHandler: jsonrpcProxyHandler,
 };
 
 export default widget;