feat: remove dagre and elkjs #918 (#1506)

### What problem does this PR solve?

feat: remove dagre and elkjs #918
### Type of change

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

web/src/pages/flow/elk-hooks.ts

@@ -1,35 +0,0 @@
-import { useCallback, useLayoutEffect } from 'react';
-import { getLayoutedElements } from './elk-utils';
-
-export const elkOptions = {
-  'elk.algorithm': 'layered',
-  'elk.layered.spacing.nodeNodeBetweenLayers': '100',
-  'elk.spacing.nodeNode': '80',
-};
-
-export const useLayoutGraph = (
-  initialNodes,
-  initialEdges,
-  setNodes,
-  setEdges,
-) => {
-  const onLayout = useCallback(({ direction, useInitialNodes = false }) => {
-    const opts = { 'elk.direction': direction, ...elkOptions };
-    const ns = initialNodes;
-    const es = initialEdges;
-
-    getLayoutedElements(ns, es, opts).then(
-      ({ nodes: layoutedNodes, edges: layoutedEdges }) => {
-        setNodes(layoutedNodes);
-        setEdges(layoutedEdges);
-
-        // window.requestAnimationFrame(() => fitView());
-      },
-    );
-  }, []);
-
-  // Calculate the initial layout on mount.
-  useLayoutEffect(() => {
-    onLayout({ direction: 'RIGHT', useInitialNodes: true });
-  }, [onLayout]);
-};

web/src/pages/flow/elk-utils.ts

@@ -1,42 +0,0 @@
-import ELK from 'elkjs/lib/elk.bundled.js';
-import { Edge, Node } from 'reactflow';
-
-const elk = new ELK();
-
-export const getLayoutedElements = (
-  nodes: Node[],
-  edges: Edge[],
-  options = {},
-) => {
-  const isHorizontal = options?.['elk.direction'] === 'RIGHT';
-  const graph = {
-    id: 'root',
-    layoutOptions: options,
-    children: nodes.map((node) => ({
-      ...node,
-      // Adjust the target and source handle positions based on the layout
-      // direction.
-      targetPosition: isHorizontal ? 'left' : 'top',
-      sourcePosition: isHorizontal ? 'right' : 'bottom',
-
-      // Hardcode a width and height for elk to use when layouting.
-      width: 150,
-      height: 50,
-    })),
-    edges: edges,
-  };
-
-  return elk
-    .layout(graph)
-    .then((layoutedGraph) => ({
-      nodes: layoutedGraph.children.map((node) => ({
-        ...node,
-        // React Flow expects a position property on the node instead of `x`
-        // and `y` fields.
-        position: { x: node.x, y: node.y },
-      })),
-
-      edges: layoutedGraph.edges,
-    }))
-    .catch(console.error);
-};

web/src/pages/flow/utils.ts

@@ -1,6 +1,5 @@
 import { DSLComponents } from '@/interfaces/database/flow';
 import { removeUselessFieldsFromValues } from '@/utils/form';
-import dagre from 'dagre';
 import { humanId } from 'human-id';
 import { curry, sample } from 'lodash';
 import pipe from 'lodash/fp/pipe';
@@ -80,48 +79,6 @@ export const buildNodesAndEdgesFromDSLComponents = (data: DSLComponents) => {
   return { nodes, edges };
 };
 
-const dagreGraph = new dagre.graphlib.Graph();
-dagreGraph.setDefaultEdgeLabel(() => ({}));
-
-const nodeWidth = 172;
-const nodeHeight = 36;
-
-export const getLayoutedElements = (
-  nodes: Node[],
-  edges: Edge[],
-  direction = 'TB',
-) => {
-  const isHorizontal = direction === 'LR';
-  dagreGraph.setGraph({ rankdir: direction });
-
-  nodes.forEach((node) => {
-    dagreGraph.setNode(node.id, { width: nodeWidth, height: nodeHeight });
-  });
-
-  edges.forEach((edge) => {
-    dagreGraph.setEdge(edge.source, edge.target);
-  });
-
-  dagre.layout(dagreGraph);
-
-  nodes.forEach((node) => {
-    const nodeWithPosition = dagreGraph.node(node.id);
-    node.targetPosition = isHorizontal ? Position.Left : Position.Top;
-    node.sourcePosition = isHorizontal ? Position.Right : Position.Bottom;
-
-    // We are shifting the dagre node position (anchor=center center) to the top left
-    // so it matches the React Flow node anchor point (top left).
-    node.position = {
-      x: nodeWithPosition.x - nodeWidth / 2,
-      y: nodeWithPosition.y - nodeHeight / 2,
-    };
-
-    return node;
-  });
-
-  return { nodes, edges };
-};
-
 const buildComponentDownstreamOrUpstream = (
   edges: Edge[],
   nodeId: string,