web/src/pages/flow/store.ts

import type {} from '@redux-devtools/extension';
import {
  Connection,
  Edge,
  EdgeChange,
  Node,
  NodeChange,
  OnConnect,
  OnEdgesChange,
  OnNodesChange,
  OnSelectionChangeFunc,
  OnSelectionChangeParams,
  addEdge,
  applyEdgeChanges,
  applyNodeChanges,
} from 'reactflow';
import { create } from 'zustand';
import { devtools } from 'zustand/middleware';
import { NodeData } from './interface';

export type RFState = {
  nodes: Node<NodeData>[];
  edges: Edge[];
  selectedNodeIds: string[];
  selectedEdgeIds: string[];
  onNodesChange: OnNodesChange;
  onEdgesChange: OnEdgesChange;
  onConnect: OnConnect;
  setNodes: (nodes: Node[]) => void;
  setEdges: (edges: Edge[]) => void;
  updateNodeForm: (nodeId: string, values: any) => void;
  onSelectionChange: OnSelectionChangeFunc;
  addNode: (nodes: Node) => void;
  deleteEdge: () => void;
  deleteEdgeById: (id: string) => void;
};

// this is our useStore hook that we can use in our components to get parts of the store and call actions
const useStore = create<RFState>()(
  devtools((set, get) => ({
    nodes: [] as Node[],
    edges: [] as Edge[],
    selectedNodeIds: [],
    selectedEdgeIds: [],
    onNodesChange: (changes: NodeChange[]) => {
      set({
        nodes: applyNodeChanges(changes, get().nodes),
      });
    },
    onEdgesChange: (changes: EdgeChange[]) => {
      set({
        edges: applyEdgeChanges(changes, get().edges),
      });
    },
    onConnect: (connection: Connection) => {
      set({
        edges: addEdge(connection, get().edges),
      });
    },
    onSelectionChange: ({ nodes, edges }: OnSelectionChangeParams) => {
      set({
        selectedEdgeIds: edges.map((x) => x.id),
        selectedNodeIds: nodes.map((x) => x.id),
      });
    },
    setNodes: (nodes: Node[]) => {
      set({ nodes });
    },
    setEdges: (edges: Edge[]) => {
      set({ edges });
    },
    addNode: (node: Node) => {
      set({ nodes: get().nodes.concat(node) });
    },
    deleteEdge: () => {
      const { edges, selectedEdgeIds } = get();
      set({
        edges: edges.filter((edge) =>
          selectedEdgeIds.every((x) => x !== edge.id),
        ),
      });
    },
    deleteEdgeById: (id: string) => {
      const { edges } = get();
      set({
        edges: edges.filter((edge) => edge.id !== id),
      });
    },
    updateNodeForm: (nodeId: string, values: any) => {
      set({
        nodes: get().nodes.map((node) => {
          if (node.id === nodeId) {
            node.data = { ...node.data, form: values };
          }

          return node;
        }),
      });
    },
  })),
);

export default useStore;