feat: Add deleteStep mutation

packages/backend/src/graphql/mutations/delete-step.ts

@@ -0,0 +1,33 @@
+import { GraphQLInt, GraphQLNonNull, GraphQLBoolean } from 'graphql';
+import Step from '../../models/step';
+import RequestWithCurrentUser from '../../types/express/request-with-current-user';
+
+type Params = {
+  id: number;
+};
+
+const deleteStepResolver = async (
+  params: Params,
+  req: RequestWithCurrentUser
+) => {
+  // TODO: This logic should be revised by using current user
+  await Step.query()
+    .delete()
+    .findOne({
+      id: params.id,
+    })
+    .throwIfNotFound();
+
+  return;
+};
+
+const deleteStep = {
+  type: GraphQLBoolean,
+  args: {
+    id: { type: GraphQLNonNull(GraphQLInt) },
+  },
+  resolve: (_: any, params: Params, req: RequestWithCurrentUser) =>
+    deleteStepResolver(params, req),
+};
+
+export default deleteStep;

packages/backend/src/graphql/root-mutation.ts

@@ -8,6 +8,7 @@ import deleteConnection from './mutations/delete-connection';
 import createFlow from './mutations/create-flow';
 import updateFlow from './mutations/update-flow';
 import createStep from './mutations/create-step';
+import deleteStep from './mutations/delete-step';
 import updateStep from './mutations/update-step';
 import executeStep from './mutations/execute-step';
 import login from './mutations/login';
@@ -25,9 +26,10 @@ const rootMutation = new GraphQLObjectType({
     updateFlow,
     createStep,
     updateStep,
+    deleteStep,
     executeStep,
-    login
-  }
+    login,
+  },
 });
 
 export default rootMutation;