Begin service token data refactor

backend/src/middleware/requireServiceTokenDataAuth.ts

@@ -0,0 +1,40 @@
+import { Request, Response, NextFunction } from 'express';
+import { ServiceToken, ServiceTokenData } from '../models';
+import { validateMembership } from '../helpers/membership';
+import { AccountNotFoundError } from '../utils/errors';
+
+type req = 'params' | 'body' | 'query';
+
+const requireServiceTokenDataAuth = ({
+    acceptedRoles,
+    acceptedStatuses,
+    location = 'params'
+}: {
+    acceptedRoles: string[];
+    acceptedStatuses: string[];
+    location?: req;
+}) => {
+    return async (req: Request, res: Response, next: NextFunction) => {
+    
+        const serviceTokenData = await ServiceTokenData
+            .findById(req[location].serviceTokenDataId)
+            .select('+encryptedKey +iv +tag');
+        
+        if (!serviceTokenData) {
+            return next(AccountNotFoundError({message: 'Failed to locate service token data'}));
+        }
+        
+        await validateMembership({
+            userId: req.user._id.toString(),
+            workspaceId: serviceTokenData.workspace.toString(),
+            acceptedRoles,
+            acceptedStatuses
+        });
+        
+        req.serviceTokenData = serviceTokenData;
+        
+        next();
+    }
+}
+
+export default requireServiceTokenDataAuth;