feat: Adjust positions and return all steps after deletion of the step

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

@@ -1,6 +1,6 @@
-import { GraphQLString, GraphQLNonNull, GraphQLBoolean } from 'graphql';
-import Step from '../../models/step';
+import { GraphQLString, GraphQLNonNull } from 'graphql';
 import RequestWithCurrentUser from '../../types/express/request-with-current-user';
+import stepType from '../types/step';
 
 type Params = {
   id: string;
@@ -10,19 +10,39 @@ const deleteStepResolver = async (
   params: Params,
   req: RequestWithCurrentUser
 ) => {
-  await req.currentUser
+  const step = await req.currentUser
     .$relatedQuery('steps')
-    .delete()
+    .withGraphFetched('flow')
     .findOne({
-      id: params.id,
+      'steps.id': params.id,
     })
     .throwIfNotFound();
 
-  return;
+  await step.$query().delete();
+
+  const nextSteps = await step.flow
+    .$relatedQuery('steps')
+    .where('position', '>', step.position);
+
+  const nextStepQueries = nextSteps.map(async (nextStep) => {
+    await nextStep.$query().patch({
+      ...nextStep,
+      position: nextStep.position - 1,
+    });
+  });
+
+  await Promise.all(nextStepQueries);
+
+  step.flow = await step.flow
+    .$query()
+    .withGraphJoined('steps')
+    .orderBy('steps.position', 'asc');
+
+  return step;
 };
 
 const deleteStep = {
-  type: GraphQLBoolean,
+  type: stepType,
   args: {
     id: { type: GraphQLNonNull(GraphQLString) },
   },

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

@@ -16,8 +16,8 @@ const rootQuery = new GraphQLObjectType({
     getAppConnections,
     testConnection,
     getFlow,
-    getFlows
-  }
+    getFlows,
+  },
 });
 
 export default rootQuery;

packages/backend/src/graphql/types/flow.ts

@@ -5,17 +5,21 @@ import {
   GraphQLString,
   GraphQLBoolean,
 } from 'graphql';
-import StepType from './step';
 
 const flowType = new GraphQLObjectType({
   name: 'Flow',
-  fields: {
-    id: { type: GraphQLString },
-    name: { type: GraphQLString },
-    active: { type: GraphQLBoolean },
-    steps: {
-      type: GraphQLList(StepType),
-    },
+  fields: () => {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
+    const StepType = require('./step').default;
+
+    return {
+      id: { type: GraphQLString },
+      name: { type: GraphQLString },
+      active: { type: GraphQLBoolean },
+      steps: {
+        type: GraphQLList(StepType),
+      },
+    };
   },
 });
 

packages/backend/src/graphql/types/step.ts

@@ -9,23 +9,29 @@ import ConnectionType from './connection';
 
 const stepType = new GraphQLObjectType({
   name: 'Step',
-  fields: {
-    id: { type: GraphQLString },
-    previousStepId: { type: GraphQLString },
-    key: { type: GraphQLString },
-    appKey: { type: GraphQLString },
-    type: {
-      type: new GraphQLEnumType({
-        name: 'StepEnumType',
-        values: {
-          trigger: { value: 'trigger' },
-          action: { value: 'action' },
-        },
-      }),
-    },
-    parameters: { type: GraphQLString },
-    connection: { type: ConnectionType },
-    position: { type: GraphQLInt },
+  fields: () => {
+    // eslint-disable-next-line @typescript-eslint/no-var-requires
+    const FlowType = require('./flow').default;
+
+    return {
+      id: { type: GraphQLString },
+      previousStepId: { type: GraphQLString },
+      key: { type: GraphQLString },
+      appKey: { type: GraphQLString },
+      type: {
+        type: new GraphQLEnumType({
+          name: 'StepEnumType',
+          values: {
+            trigger: { value: 'trigger' },
+            action: { value: 'action' },
+          },
+        }),
+      },
+      parameters: { type: GraphQLString },
+      connection: { type: ConnectionType },
+      flow: { type: FlowType },
+      position: { type: GraphQLInt },
+    };
   },
 });
 

packages/backend/src/models/step.ts

@@ -17,6 +17,7 @@ class Step extends Base {
   position: number;
   parameters: string;
   connection?: Connection;
+  flow?: Flow;
 
   static tableName = 'steps';