feat: fixed issue with threshold translation #882 and add NodeContextMenu (#906)

### What problem does this PR solve?

feat: fixed issue with threshold translation #882
feat: add NodeContextMenu

### Type of change


- [ ] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/canvas/context-menu/index.less

@@ -0,0 +1,18 @@
+.contextMenu {
+  background: white;
+  border-style: solid;
+  box-shadow: 10px 19px 20px rgba(0, 0, 0, 10%);
+  position: absolute;
+  z-index: 10;
+  button {
+    border: none;
+    display: block;
+    padding: 0.5em;
+    text-align: left;
+    width: 100%;
+  }
+
+  button:hover {
+    background: white;
+  }
+}

web/src/pages/flow/canvas/context-menu/index.tsx

@@ -0,0 +1,108 @@
+import { useCallback, useRef, useState } from 'react';
+import { NodeMouseHandler, useReactFlow } from 'reactflow';
+
+import styles from './index.less';
+
+export interface INodeContextMenu {
+  id: string;
+  top: number;
+  left: number;
+  right?: number;
+  bottom?: number;
+  [key: string]: unknown;
+}
+
+export function NodeContextMenu({
+  id,
+  top,
+  left,
+  right,
+  bottom,
+  ...props
+}: INodeContextMenu) {
+  const { getNode, setNodes, addNodes, setEdges } = useReactFlow();
+
+  const duplicateNode = useCallback(() => {
+    const node = getNode(id);
+    const position = {
+      x: node?.position?.x || 0 + 50,
+      y: node?.position?.y || 0 + 50,
+    };
+
+    addNodes({
+      ...(node || {}),
+      data: node?.data,
+      selected: false,
+      dragging: false,
+      id: `${node?.id}-copy`,
+      position,
+    });
+  }, [id, getNode, addNodes]);
+
+  const deleteNode = useCallback(() => {
+    setNodes((nodes) => nodes.filter((node) => node.id !== id));
+    setEdges((edges) => edges.filter((edge) => edge.source !== id));
+  }, [id, setNodes, setEdges]);
+
+  return (
+    <div
+      style={{ top, left, right, bottom }}
+      className={styles.contextMenu}
+      {...props}
+    >
+      <p style={{ margin: '0.5em' }}>
+        <small>node: {id}</small>
+      </p>
+      <button onClick={duplicateNode} type={'button'}>
+        duplicate
+      </button>
+      <button onClick={deleteNode} type={'button'}>
+        delete
+      </button>
+    </div>
+  );
+}
+
+export const useHandleNodeContextMenu = (sideWidth: number) => {
+  const [menu, setMenu] = useState<INodeContextMenu>({} as INodeContextMenu);
+  const ref = useRef<any>(null);
+
+  const onNodeContextMenu: NodeMouseHandler = useCallback(
+    (event, node) => {
+      // Prevent native context menu from showing
+      event.preventDefault();
+
+      // Calculate position of the context menu. We want to make sure it
+      // doesn't get positioned off-screen.
+      const pane = ref.current?.getBoundingClientRect();
+      // setMenu({
+      //   id: node.id,
+      //   top: event.clientY < pane.height - 200 ? event.clientY : 0,
+      //   left: event.clientX < pane.width - 200 ? event.clientX : 0,
+      //   right: event.clientX >= pane.width - 200 ? pane.width - event.clientX : 0,
+      //   bottom:
+      //     event.clientY >= pane.height - 200 ? pane.height - event.clientY : 0,
+      // });
+
+      console.info('clientX:', event.clientX);
+      console.info('clientY:', event.clientY);
+
+      setMenu({
+        id: node.id,
+        top: event.clientY - 72,
+        left: event.clientX - sideWidth,
+        // top: event.clientY < pane.height - 200 ? event.clientY - 72 : 0,
+        // left: event.clientX < pane.width - 200 ? event.clientX : 0,
+      });
+    },
+    [sideWidth],
+  );
+
+  // Close the context menu if it's open whenever the window is clicked.
+  const onPaneClick = useCallback(
+    () => setMenu({} as INodeContextMenu),
+    [setMenu],
+  );
+
+  return { onNodeContextMenu, menu, onPaneClick, ref };
+};

web/src/pages/flow/canvas/index.tsx

@@ -4,6 +4,7 @@ import ReactFlow, {
   Controls,
   Edge,
   Node,
+  NodeMouseHandler,
   OnConnect,
   OnEdgesChange,
   OnNodesChange,
@@ -13,7 +14,10 @@ import ReactFlow, {
 } from 'reactflow';
 import 'reactflow/dist/style.css';
 
-import { useHandleDrop } from '../hooks';
+import { NodeContextMenu, useHandleNodeContextMenu } from './context-menu';
+
+import FlowDrawer from '../flow-drawer';
+import { useHandleDrop, useShowDrawer } from '../hooks';
 import { TextUpdaterNode } from './node';
 
 const nodeTypes = { textUpdater: TextUpdaterNode };
@@ -42,9 +46,17 @@ const initialEdges = [
   { id: '1-2', source: '1', target: '2', label: 'to the', type: 'step' },
 ];
 
-function FlowCanvas() {
+interface IProps {
+  sideWidth: number;
+  showDrawer(): void;
+}
+
+function FlowCanvas({ sideWidth }: IProps) {
   const [nodes, setNodes] = useState<Node[]>(initialNodes);
   const [edges, setEdges] = useState<Edge[]>(initialEdges);
+  const { ref, menu, onNodeContextMenu, onPaneClick } =
+    useHandleNodeContextMenu(sideWidth);
+  const { drawerVisible, hideDrawer, showDrawer } = useShowDrawer();
 
   const onNodesChange: OnNodesChange = useCallback(
     (changes) => setNodes((nds) => applyNodeChanges(changes, nds)),
@@ -60,7 +72,11 @@ function FlowCanvas() {
     [],
   );
 
-  const { handleDrop, allowDrop } = useHandleDrop(setNodes);
+  const onNodeClick: NodeMouseHandler = useCallback(() => {
+    showDrawer();
+  }, [showDrawer]);
+
+  const { onDrop, onDragOver, setReactFlowInstance } = useHandleDrop(setNodes);
 
   useEffect(() => {
     console.info('nodes:', nodes);
@@ -68,23 +84,30 @@ function FlowCanvas() {
   }, [nodes, edges]);
 
   return (
-    <div
-      style={{ height: '100%', width: '100%' }}
-      onDrop={handleDrop}
-      onDragOver={allowDrop}
-    >
+    <div style={{ height: '100%', width: '100%' }}>
       <ReactFlow
+        ref={ref}
         nodes={nodes}
         onNodesChange={onNodesChange}
+        onNodeContextMenu={onNodeContextMenu}
         edges={edges}
         onEdgesChange={onEdgesChange}
-        // fitView
+        fitView
         onConnect={onConnect}
         nodeTypes={nodeTypes}
+        onPaneClick={onPaneClick}
+        onDrop={onDrop}
+        onDragOver={onDragOver}
+        onNodeClick={onNodeClick}
+        onInit={setReactFlowInstance}
       >
         <Background />
         <Controls />
+        {Object.keys(menu).length > 0 && (
+          <NodeContextMenu onClick={onPaneClick} {...(menu as any)} />
+        )}
       </ReactFlow>
+      <FlowDrawer visible={drawerVisible} hideModal={hideDrawer}></FlowDrawer>
     </div>
   );
 }