DBController refactoring (#1228)

* Moves transform to MongoTransform

- Adds ACL query injection in MongoTransform

* Removes adaptiveCollection from DatabaseController

- All collections manipulations are now handled by a DBController
- Adds optional flags to configure an unsafe databaseController for direct
  access
- Adds ability to configure RestWrite with multiple writes
- Moves some transfirmations to MongoTransform as they output specific code

* Renames Unsafe to WithoutValidation

src/Routers/GlobalConfigRouter.js

@@ -5,33 +5,28 @@ import * as middleware from "../middlewares";
 
 export class GlobalConfigRouter extends PromiseRouter {
   getGlobalConfig(req) {
-    return req.config.database.adaptiveCollection('_GlobalConfig')
-      .then(coll => coll.find({ '_id': 1 }, { limit: 1 }))
-      .then(results => {
-        if (results.length != 1) {
-          // If there is no config in the database - return empty config.
-          return { response: { params: {} } };
-        }
-        let globalConfig = results[0];
-        return { response: { params: globalConfig.params } };
-      });
+    let database = req.config.database.WithoutValidation();
+    return database.find('_GlobalConfig', { '_id': 1 }, { limit: 1 }).then((results) => {
+      if (results.length != 1) {
+        // If there is no config in the database - return empty config.
+        return { response: { params: {} } };
+      }
+      let globalConfig = results[0];
+      return { response: { params: globalConfig.params } };
+    });
   }
 
   updateGlobalConfig(req) {
-    const params = req.body.params;
+    let params = req.body.params;
+    // Transform in dot notation to make sure it works
     const update = Object.keys(params).reduce((acc, key) => {
-      if(params[key] && params[key].__op && params[key].__op === "Delete") {
-        if (!acc.$unset) acc.$unset = {};
-        acc.$unset[`params.${key}`] = "";
-      } else {
-        if (!acc.$set) acc.$set = {};
-        acc.$set[`params.${key}`] = params[key];
-      }
+      acc[`params.${key}`] = params[key];
       return acc;
     }, {});
-    return req.config.database.adaptiveCollection('_GlobalConfig')
-      .then(coll => coll.upsertOne({ _id: 1 }, update))
-      .then(() => ({ response: { result: true } }));
+    let database = req.config.database.WithoutValidation();
+    return database.update('_GlobalConfig', {_id: 1}, update, {upsert: true}).then(() => {
+      return Promise.resolve({ response: { result: true } });
+    });
   }
 
   mountRoutes() {