@procore/core-react/dist/Tree/Tree.hooks.js

React library of Procore Design Guidelines

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import React from 'react';
import { useListNavigation } from '../_hooks/ListNavigation';
import { useSet } from '../_hooks/useSet';
import { isRootNode } from './Tree';
export function useTree(_ref) {
  var rootNodes = _ref.rootNodes,
    expanded = _ref.expanded,
    selected = _ref.selected,
    selectionLimit = _ref.selectionLimit,
    onSelect = _ref.onSelect,
    multiple = _ref.multiple,
    autoExpandParent = _ref.autoExpandParent,
    getChildren = _ref.getChildren,
    getParentId = _ref.getParentId,
    onCollapse = _ref.onCollapse,
    onExpand = _ref.onExpand;
  var getNodes = React.useCallback(function (nodes, node) {
    return [].concat(_toConsumableArray(nodes), [node], _toConsumableArray(getChildren(node).reduce(getNodes, [])));
  }, [getChildren]);
  var nodes = React.useMemo(function () {
    return rootNodes.map(function (el) {
      return getNodes([], el);
    }).flat();
  }, [rootNodes, getNodes]);
  var getNodeById = React.useCallback(function (nodeId) {
    return nodes.find(function (item) {
      return item.id === nodeId;
    });
  }, [nodes]);
  var _useSet = useSet(),
    isLoading = _useSet.has,
    startLoading = _useSet.add,
    stopLoading = _useSet.remove;
  var handleChange = React.useCallback(function (selectedNodes) {
    return onSelect(Array.from(selectedNodes).map(getNodeById));
  }, [getNodeById, onSelect]);
  var _useSet2 = useSet({
      initialValue: new Set(selected),
      onChange: handleChange
    }),
    selectedIds = _useSet2.collection,
    isSelected = _useSet2.has,
    addSelected = _useSet2.add,
    removeSelected = _useSet2.remove,
    setSelected = _useSet2.setCollection;
  var toggleSingleSelected = React.useCallback(function (nodeId) {
    setSelected(new Set([nodeId]));
  }, [setSelected]);
  var toggleSelected = React.useCallback(function (nodeId) {
    if (!isSelected(nodeId)) {
      if (selectedIds.size < selectionLimit) {
        addSelected(nodeId);
      }
    } else {
      removeSelected(nodeId);
    }
  }, [addSelected, isSelected, removeSelected, selectedIds.size, selectionLimit]);
  var toggleSelection = React.useMemo(function () {
    return multiple ? toggleSelected : toggleSingleSelected;
  }, [multiple, toggleSelected, toggleSingleSelected]);
  var handleSelection = React.useCallback(function (node) {
    return toggleSelection(node.id);
  }, [toggleSelection]);

  /* eslint-disable react-hooks/exhaustive-deps */
  React.useEffect(function () {
    Array.from(selectedIds).filter(function (id) {
      return !selected.includes(id);
    }).forEach(removeSelected);
    selected.filter(function (id) {
      return !isSelected(id);
    }).forEach(addSelected);
  }, [selected]);
  /* eslint-enable react-hooks/exhaustive-deps */

  var handleExpand = React.useCallback( /*#__PURE__*/function () {
    var _ref2 = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime().mark(function _callee(nodeId) {
      return _regeneratorRuntime().wrap(function _callee$(_context) {
        while (1) switch (_context.prev = _context.next) {
          case 0:
            _context.prev = 0;
            startLoading(nodeId);
            _context.next = 4;
            return onExpand(getNodeById(nodeId));
          case 4:
            _context.prev = 4;
            stopLoading(nodeId);
            return _context.finish(4);
          case 7:
          case "end":
            return _context.stop();
        }
      }, _callee, null, [[0,, 4, 7]]);
    }));
    return function (_x) {
      return _ref2.apply(this, arguments);
    };
  }(), [getNodeById, onExpand, startLoading, stopLoading]);
  var handleCollapse = React.useCallback(function (nodeId) {
    return onCollapse(getNodeById(nodeId));
  }, [getNodeById, onCollapse]);
  var getExpandedIds = React.useCallback(function (nodeIds, currentNode) {
    var parentId = getParentId(currentNode);
    if (rootNodes.find(function (rootNode) {
      return parentId === rootNode.id;
    }) || isRootNode(parentId)) {
      return [].concat(_toConsumableArray(nodeIds), [currentNode.id, parentId]);
    } else {
      return getExpandedIds([].concat(_toConsumableArray(nodeIds), [currentNode.id]), getNodeById(parentId));
    }
  }, [getNodeById, getParentId, rootNodes]);
  var expandedIds = React.useMemo(function () {
    if (autoExpandParent) {
      return nodes.filter(function (node) {
        return expanded.concat(Array.from(selectedIds)).includes(node.id);
      }).reduce(getExpandedIds, []);
    }
    return expanded;
  }, [autoExpandParent, expanded, getExpandedIds, nodes, selectedIds]);
  var _useSet3 = useSet({
      initialValue: new Set(expandedIds),
      onAdd: handleExpand,
      onRemove: handleCollapse
    }),
    addExpanded = _useSet3.add,
    isExpanded = _useSet3.has,
    toggleExpanded = _useSet3.toggle,
    setExpanded = _useSet3.setCollection;

  /* eslint-disable react-hooks/exhaustive-deps */
  React.useEffect(function () {
    expandedIds.filter(function (id) {
      return !isExpanded(id);
    }).forEach(addExpanded);
  }, [expandedIds]);
  /* eslint-enable react-hooks/exhaustive-deps */

  var listNavigation = useListNavigation({
    circular: false,
    initialIndex: 0,
    size: 0
  });
  var getSelectableItems = React.useCallback(function (visibleNodes, node) {
    var visibleItems = isExpanded(node.id) && !isLoading(node.id) && node.items ? node.items.reduce(getSelectableItems, []) : [];
    return [].concat(_toConsumableArray(visibleNodes), [node], _toConsumableArray(visibleItems));
  }, [isExpanded, isLoading]);
  var getChildrenNodes = React.useCallback(function (nodes, node, level, posInSet, setSize) {
    var children = getChildren(node);
    if (children.length > 0) {
      var childSetSize = children.length;
      return [].concat(_toConsumableArray(nodes), [_objectSpread(_objectSpread({}, node), {}, {
        level: level,
        setSize: setSize,
        posInSet: posInSet,
        items: children.reduce(function (acc, curr, index) {
          return getChildrenNodes(acc, curr, level + 1, index + 1, childSetSize);
        }, [])
      })]);
    } else {
      return [].concat(_toConsumableArray(nodes), [_objectSpread(_objectSpread({}, node), {}, {
        level: level,
        setSize: setSize,
        posInSet: posInSet
      })]);
    }
  }, [getChildren]);
  var nodesTree = React.useMemo(function () {
    return Array.isArray(rootNodes) ? rootNodes.map(function (el, index) {
      return getChildrenNodes([], el, 0, index + 1, rootNodes.length);
    }).flat() : [];
  }, [rootNodes, getChildrenNodes]);
  var visibleNodes = React.useMemo(function () {
    return nodesTree.reduce(getSelectableItems, []);
  }, [getSelectableItems, nodesTree]);
  var highlight = React.useCallback(function (node) {
    var index = visibleNodes.findIndex(function (visibleNode) {
      return visibleNode.id === node.id;
    });
    if (index !== -1) {
      listNavigation.set(index);
    }
  }, [listNavigation, visibleNodes]);
  React.useEffect(function () {
    listNavigation.setSize(visibleNodes.length);
  }, [listNavigation, visibleNodes.length]);
  var isHighlighted = React.useCallback(function (node) {
    return visibleNodes[listNavigation.index] && visibleNodes[listNavigation.index].id === node.id;
  }, [listNavigation.index, visibleNodes]);
  var highlightedNode = React.useMemo(function () {
    return visibleNodes[listNavigation.index];
  }, [listNavigation.index, visibleNodes]);
  return {
    nodes: visibleNodes,
    isExpanded: React.useCallback(function (node) {
      return isExpanded(node.id);
    }, [isExpanded]),
    isSelected: React.useCallback(function (node) {
      return isSelected(node.id);
    }, [isSelected]),
    isLoading: React.useCallback(function (node) {
      return isLoading(node.id);
    }, [isLoading]),
    highlightedNode: highlightedNode,
    isHighlighted: isHighlighted,
    highlight: highlight,
    handleSelection: handleSelection,
    handleExpansion: React.useCallback(function (node) {
      return toggleExpanded(node.id);
    }, [toggleExpanded]),
    setSelected: setSelected,
    setExpanded: setExpanded,
    isFileLimitReached: selectedIds.size >= selectionLimit,
    listNavigation: listNavigation
  };
}
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