Add config page

lib/ui/db.js

@@ -187,6 +187,38 @@ export function count(resource, filter) {
   });
 }
 
+export function deleteConfig(id) {
+  return new Promise((resolve, reject) => {
+    getClient()
+      .then(client => {
+        const collection = client
+          .db()
+          .collection(RESOURCE_COLLECTION["config"] || "config");
+        collection.deleteOne({ _id: id }, err => {
+          if (err) return void reject(err);
+          resolve();
+        });
+      })
+      .catch(reject);
+  });
+}
+
+export function putConfig(id, object) {
+  return new Promise((resolve, reject) => {
+    getClient()
+      .then(client => {
+        const collection = client
+          .db()
+          .collection(RESOURCE_COLLECTION["config"] || "config");
+        collection.replaceOne({ _id: id }, object, { upsert: true }, err => {
+          if (err) return void reject(err);
+          resolve();
+        });
+      })
+      .catch(reject);
+  });
+}
+
 export function disconnect() {
   if (_clientPromise) {
     _clientPromise.then(client => {