Endpoint for purging all objects in class (#2032)

* Endpoint for purging all objects in class

* Use deleteObjectsByQuery

* Standalone handling function and purge cache

* Change endpoint url

src/Controllers/DatabaseController.js

@@ -91,6 +91,16 @@ DatabaseController.prototype.collectionExists = function(className) {
   return this.adapter.classExists(className);
 };
 
+DatabaseController.prototype.purgeCollection = function(className) {
+  return this.loadSchema()
+  .then((schema) => {
+    schema.getOneSchema(className)
+  })
+  .then((schema) => {
+    this.adapter.deleteObjectsByQuery(className, {}, schema);
+  });
+};
+
 DatabaseController.prototype.validateClassName = function(className) {
   if (this.skipValidation) {
     return Promise.resolve();

src/ParseServer.js

@@ -50,6 +50,7 @@ import { SchemasRouter }        from './Routers/SchemasRouter';
 import { SessionsRouter }       from './Routers/SessionsRouter';
 import { UserController }       from './Controllers/UserController';
 import { UsersRouter }          from './Routers/UsersRouter';
+import { PurgeRouter }          from './Routers/PurgeRouter';
 
 import DatabaseController       from './Controllers/DatabaseController';
 const SchemaController = require('./Controllers/SchemaController');
@@ -291,6 +292,7 @@ class ParseServer {
       new IAPValidationRouter(),
       new FeaturesRouter(),
       new GlobalConfigRouter(),
+      new PurgeRouter(),
     ];
 
     if (process.env.PARSE_EXPERIMENTAL_HOOKS_ENABLED || process.env.TESTING) {

src/Routers/FeaturesRouter.js

@@ -36,7 +36,7 @@ export class FeaturesRouter extends PromiseRouter {
           removeField: true,
           addClass: true,
           removeClass: true,
-          clearAllDataFromClass: false,
+          clearAllDataFromClass: true,
           exportClass: false,
           editClassLevelPermissions: true,
           editPointerPermissions: true,

src/Routers/PurgeRouter.js

@@ -0,0 +1,24 @@
+import PromiseRouter from '../PromiseRouter';
+import * as middleware from '../middlewares';
+
+export class PurgeRouter extends PromiseRouter {
+
+  handlePurge(req) {
+    return req.config.database.purgeCollection(req.params.className)
+    .then(() => {
+      var cacheAdapter = req.config.cacheController;
+      if (req.params.className == '_Session') {
+        cacheAdapter.user.clear();
+      } else if (req.params.className == '_Role') {
+        cacheAdapter.role.clear();
+      }
+      return {response: {}};
+    });
+  }
+
+  mountRoutes() {
+    this.route('DELETE',  '/purge/:className', middleware.promiseEnforceMasterKeyAccess, (req) => { return this.handlePurge(req); });
+  }
+}
+
+export default PurgeRouter;