feat: Convert all mutation files to js

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

@@ -0,0 +1,35 @@
+const deleteStep = async (_parent, params, context) => {
+  context.currentUser.can('update', 'Flow');
+
+  const step = await context.currentUser
+    .$relatedQuery('steps')
+    .withGraphFetched('flow')
+    .findOne({
+      'steps.id': params.input.id,
+    })
+    .throwIfNotFound();
+
+  await step.$relatedQuery('executionSteps').delete();
+  await step.$query().delete();
+
+  const nextSteps = await step.flow
+    .$relatedQuery('steps')
+    .where('position', '>', step.position);
+
+  const nextStepQueries = nextSteps.map(async (nextStep) => {
+    await nextStep.$query().patch({
+      position: nextStep.position - 1,
+    });
+  });
+
+  await Promise.all(nextStepQueries);
+
+  step.flow = await step.flow
+    .$query()
+    .withGraphJoined('steps')
+    .orderBy('steps.position', 'asc');
+
+  return step;
+};
+
+export default deleteStep;