Complete v1 API reference docs, pre-launch

backend/src/middleware/requireMembershipAuth.ts

@@ -0,0 +1,57 @@
+import { Request, Response, NextFunction } from 'express';
+import { UnauthorizedRequestError } from '../utils/errors';
+import {
+    Membership,
+} from '../models';
+import { validateMembership } from '../helpers/membership';
+
+type req = 'params' | 'body' | 'query';
+/**
+ * Validate membership with id [membershipId] and that user with id
+ * [req.user._id] can modify that membership.
+ * @param {Object} obj
+ * @param {String[]} obj.acceptedRoles - accepted workspace roles for JWT auth
+ * @param {String[]} obj.location - location of [workspaceId] on request (e.g. params, body) for parsing
+ */
+const requireMembershipAuth = ({
+    acceptedRoles,
+    location = 'params'
+}: {
+    acceptedRoles: string[];
+    location?: req;
+}) => {
+    return async (
+        req: Request, 
+        res: Response, 
+        next: NextFunction
+    ) => {
+        try {
+            const { membershipId } = req[location];
+            
+            const membership = await Membership.findById(membershipId);
+            
+            if (!membership) throw new Error('Failed to find target membership');
+            
+            const userMembership = await Membership.findOne({
+                workspace: membership.workspace
+            });
+            
+            if (!userMembership) throw new Error('Failed to validate own membership')
+            
+            const targetMembership = await validateMembership({
+                userId: req.user._id.toString(),
+                workspaceId: membership.workspace.toString(),
+                acceptedRoles
+            });
+            
+            req.targetMembership = targetMembership;
+
+        } catch (err) {
+            return next(UnauthorizedRequestError({ 
+                message: 'Unable to validate workspace membership' 
+            }));
+        }
+    }
+}
+
+export default requireMembershipAuth;