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import { List, Map, fromJS } from 'immutable'; |
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export const treeToFlatList = ( |
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data, |
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rootIdentifier = 'root', |
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childIdentifier = 'children' |
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) => { |
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if (!data) { |
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throw new Error('Expected data to be defined'); |
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} |
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const result = []; |
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let stack = List(); |
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const cfg = { flatIndex: 0 }; |
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if (!Map.isMap(data)) { |
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data = fromJS(data); |
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} |
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if (data.get(rootIdentifier)) { |
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data = data.get(rootIdentifier); |
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stack = stack.push( |
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toItem(List(), childIdentifier, cfg)(data) |
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); |
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} |
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else { |
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stack = data.get(childIdentifier).map( |
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toItem(List([-1]), List([0]), childIdentifier) |
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); |
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} |
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while (stack.count()) { |
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const item = stack.first(); |
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stack = stack.shift(); |
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const children = item.get(childIdentifier); |
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// console.log(item.get('id'), (children || List()).map(i => i.get('id')).toJS(), stack.map(i => i.get('id')).toJS()); |
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if (List.isList(children) && !item.get('_hideChildren')) { |
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stack = children.map( |
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toItem( |
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item.get('_path').push(item.get('_id')), |
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childIdentifier, |
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cfg, |
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item, |
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children |
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) |
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).concat(stack); |
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} |
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// removing erroneous data since grid uses internal values |
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result.push( |
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item.delete(childIdentifier) |
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.delete('parentId') |
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.delete('id') |
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); |
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} |
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return List(result); |
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}; |
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const toItem = ( |
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path, childIdentifier, cfg, parent, siblings = List() |
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) => (node, index = 0) => { |
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const previousSibling = index - 1 > -1 |
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? siblings.get(index - 1) |
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: undefined; |
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const previousSiblingTotalChilden = ( |
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previousSibling && previousSibling.get(childIdentifier) |
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? previousSibling.get(childIdentifier).count() |
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: 0 |
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); |
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return node.merge({ |
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_id: node.get('id'), |
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_parentId: node.get('parentId', 'root'), |
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_parentIndex: parent ? parent.get('_index') : 0, |
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_depth: path.count(), |
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_hideChildren: node.get('_hideChildren'), |
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_hasChildren: ( |
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node.get(childIdentifier) && node.get(childIdentifier).count() > 0 |
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), |
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_index: index, |
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_flatIndex: cfg.flatIndex++, |
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_isFirstChild: index === 0, |
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_isLastChild: index === siblings.count() - 1, |
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_previousSiblingId: previousSibling |
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? previousSibling.get('id') |
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: undefined, |
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_previousSiblingTotalChilden: previousSiblingTotalChilden, |
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_key: `tree-item-${node.get('id')}`, |
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_isExpanded: ( |
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node.get(childIdentifier) |
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&& node.get(childIdentifier).count() > 0 |
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&& !node.get('_hideChildren') |
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), |
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_leaf: !( |
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(node.get(childIdentifier) && node.get(childIdentifier).count() > 0) |
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|| (node.get('leaf') !== undefined && node.get('leaf') === false) |
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), |
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_path: path |
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}); |
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111
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}; |
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bencripps /
react-redux-grid
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