WIP: Successful Google Auth, broke pretty much everything else in the process

server/middlewares/validation.js

@@ -0,0 +1,47 @@
+// @flow
+import validator from 'validator';
+import { type Context } from 'koa';
+import { ParamRequiredError, ValidationError } from '../errors';
+import { validateColorHex } from '../../shared/utils/color';
+
+export default function validation() {
+  return function validationMiddleware(ctx: Context, next: () => Promise<*>) {
+    ctx.assertPresent = (value, message) => {
+      if (value === undefined || value === null || value === '') {
+        throw new ParamRequiredError(message);
+      }
+    };
+
+    ctx.assertNotEmpty = (value, message) => {
+      if (value === '') {
+        throw new ValidationError(message);
+      }
+    };
+
+    ctx.assertEmail = (value, message) => {
+      if (!validator.isEmail(value)) {
+        throw new ValidationError(message);
+      }
+    };
+
+    ctx.assertUuid = (value, message) => {
+      if (!validator.isUUID(value)) {
+        throw new ValidationError(message);
+      }
+    };
+
+    ctx.assertPositiveInteger = (value, message) => {
+      if (!validator.isInt(value, { min: 0 })) {
+        throw new ValidationError(message);
+      }
+    };
+
+    ctx.assertHexColor = (value, message) => {
+      if (!validateColorHex(value)) {
+        throw new ValidationError(message);
+      }
+    };
+
+    return next();
+  };
+}