@igo2/utils
Version:
208 lines • 24.2 kB
JavaScript
export const TREE_SEPERATOR = '.';
export class Tree {
config;
_data;
getChildren;
getId;
getLevel;
constructor(initialData, config) {
this.config = config;
this.getChildren = config.getChildren;
this.getId = config.getId;
this.getLevel = config.getLevel;
this._data = this.sortDeep(initialData);
}
get data() {
return this._data;
}
get flattened() {
return this.flatten([...this.data]);
}
add(...nodes) {
this.sortDeep(nodes);
this._data.unshift(...nodes);
return nodes;
}
addBefore(beforeId, ...nodes) {
this.sortDeep(nodes);
this._addBefore(beforeId, this._data, ...nodes);
}
remove(...nodes) {
return this._remove(...nodes);
}
clear() {
this._data = [];
}
exist(node) {
const id = this.getId(node);
return this.flattened.some((layer) => this.getId(layer) === id);
}
/**
* Move a node to a different position
* @param node
* @param beforeTo The position of index into the tree. If -1 move at the end
*/
moveTo(beforeTo, ...nodes) {
const clonedBeforeTo = [...beforeTo];
const lastIndex = clonedBeforeTo.pop();
const recipient = this.getAncestorAtPosition(clonedBeforeTo);
const beforeId = lastIndex === -1 || lastIndex >= recipient.length
? null
: this.getId(recipient[lastIndex]);
const nodesToMove = nodes.filter((node) => beforeId !== this.getId(node));
return this.move(beforeId, recipient, ...nodesToMove);
}
getPosition(node) {
const id = this.getId(node);
return this._getPosition(id);
}
_addBefore(beforeId, recipient = this._data, ...nodes) {
if (!beforeId) {
recipient.push(...nodes);
return nodes;
}
const beforeIndex = this.getIndex(beforeId, recipient);
recipient.splice(beforeIndex, 0, ...nodes);
return nodes;
}
_remove(...nodes) {
return nodes.reduce((acc, node) => {
const ancestor = this.getNodeAncestor(node);
if (!ancestor) {
return;
}
const index = this.getIndex(this.getId(node), ancestor);
if (index === -1) {
return;
}
ancestor.splice(index, 1);
return acc.concat(node);
}, []);
}
/**
* Move an node before an id
* @param node Node to be move
* @param recipient
* @param beforeId
*/
move(beforeId, recipient, ...nodes) {
this._remove(...nodes);
return this._addBefore(beforeId, recipient, ...nodes);
}
_getPosition(id, ancestorsIndex = [], values = this._data) {
let indexList;
values.some((value, index) => {
if (this.getId(value) === id) {
indexList = ancestorsIndex.concat(index);
return true;
}
const children = this.getChildren(value);
if (children) {
const groupIndexList = this._getPosition(id, ancestorsIndex.concat(index), children);
if (groupIndexList) {
indexList = groupIndexList;
return true;
}
}
return false;
});
return indexList;
}
getAncestorAtPosition(position) {
if (!position.length) {
return this._data;
}
const node = this.getNodeByPosition(position);
return this.getChildren(node);
}
/** Recursive */
sortDeep(data = this._data) {
data.forEach((node) => {
const children = this.getChildren(node);
if (children) {
this.sortDeep(children);
}
});
return this.sort(data);
}
sort(children) {
const sorted = children.sort((a, b) => this.getLevel(a) - this.getLevel(b));
return this.config.reverse ? sorted.reverse() : sorted;
}
/** Recursive */
_getNodeById(id, data = this._data) {
let node;
data.some((item) => {
if (this.getId(item) === id) {
node = item;
return true;
}
const children = this.getChildren(item);
if (children) {
node = this._getNodeById(id, children);
if (node) {
return true;
}
}
return false;
});
return node;
}
getNodeByPosition(indexes) {
if (indexes.length > 1) {
return indexes.reduce((previousValue, index) => {
const ancestor = previousValue
? this.getChildren(previousValue)
: this._data;
return this._getByIndex(index, ancestor);
}, null);
}
else {
return this._getByIndex(indexes[0]);
}
}
_getByIndex(index, ancestor = this._data) {
return ancestor[index];
}
getNodeAncestor(node) {
const id = this.getId(node);
return this.getAncestorById(id);
}
/** Recursive */
getAncestorById(id, data = this._data) {
let ancestor;
data.some((item) => {
if (this.getId(item) === id) {
ancestor = data;
return true;
}
const children = this.getChildren(item);
if (children) {
ancestor = this.getAncestorById(id, children);
if (ancestor) {
return true;
}
}
return false;
});
return ancestor;
}
/** Recursive */
flatten(nodes) {
return nodes.reduce((list, node) => {
const children = this.getChildren(node);
if (children) {
const flattened = this.flatten(children);
list.push(node, ...flattened);
}
else {
list.push(node);
}
return list;
}, []);
}
getIndex(id, ancestor) {
return ancestor.findIndex((node) => this.getId(node) === id);
}
}
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ITreeConfig<T> {\n  getChildren: (dataNode: T) => T[] | undefined | null;\n  getId: (dataNode: T) => string;\n  getLevel: (dataNode: T) => number;\n  reverse?: boolean;\n}\n\nexport const TREE_SEPERATOR = '.';\n\nexport class Tree<T> {\n  private _data: T[];\n\n  getChildren: (dataNode: T) => T[] | undefined | null;\n  getId: (dataNode: T) => string;\n  getLevel: (dataNode: T) => number;\n\n  constructor(\n    initialData: T[],\n    private config: ITreeConfig<T>\n  ) {\n    this.getChildren = config.getChildren;\n    this.getId = config.getId;\n    this.getLevel = config.getLevel;\n\n    this._data = this.sortDeep(initialData);\n  }\n\n  get data(): readonly T[] {\n    return this._data;\n  }\n\n  get flattened(): readonly T[] {\n    return this.flatten([...this.data]);\n  }\n\n  add(...nodes: T[]): T[] {\n    this.sortDeep(nodes);\n    this._data.unshift(...nodes);\n    return nodes;\n  }\n\n  addBefore(beforeId: string | undefined, ...nodes: T[]): void {\n    this.sortDeep(nodes);\n    this._addBefore(beforeId, this._data, ...nodes);\n  }\n\n  remove(...nodes: T[]): T[] {\n    return this._remove(...nodes);\n  }\n\n  clear(): void {\n    this._data = [];\n  }\n\n  exist(node: T): boolean {\n    const id = this.getId(node);\n    return this.flattened.some((layer) => this.getId(layer) === id);\n  }\n\n  /**\n   * Move a node to a different position\n   * @param node\n   * @param beforeTo The position of index into the tree. If -1 move at the end\n   */\n  moveTo(beforeTo: number[], ...nodes: T[]): T[] {\n    const clonedBeforeTo = [...beforeTo];\n    const lastIndex = clonedBeforeTo.pop();\n    const recipient = this.getAncestorAtPosition(clonedBeforeTo);\n    const beforeId =\n      lastIndex === -1 || lastIndex >= recipient.length\n        ? null\n        : this.getId(recipient[lastIndex]);\n\n    const nodesToMove = nodes.filter((node) => beforeId !== this.getId(node));\n    return this.move(beforeId, recipient, ...nodesToMove);\n  }\n\n  getPosition(node: T): number[] {\n    const id = this.getId(node);\n    return this._getPosition(id);\n  }\n\n  private _addBefore(\n    beforeId: string | undefined,\n    recipient = this._data,\n    ...nodes: T[]\n  ): T[] {\n    if (!beforeId) {\n      recipient.push(...nodes);\n      return nodes;\n    }\n\n    const beforeIndex = this.getIndex(beforeId, recipient);\n    recipient.splice(beforeIndex, 0, ...nodes);\n\n    return nodes;\n  }\n\n  private _remove(...nodes: T[]): T[] {\n    return nodes.reduce((acc: T[], node) => {\n      const ancestor = this.getNodeAncestor(node);\n      if (!ancestor) {\n        return;\n      }\n\n      const index = this.getIndex(this.getId(node), ancestor);\n      if (index === -1) {\n        return;\n      }\n      ancestor.splice(index, 1);\n\n      return acc.concat(node);\n    }, []);\n  }\n\n  /**\n   * Move an node before an id\n   * @param node Node to be move\n   * @param recipient\n   * @param beforeId\n   */\n  private move(\n    beforeId: string | undefined,\n    recipient: T[],\n    ...nodes: T[]\n  ): T[] {\n    this._remove(...nodes);\n    return this._addBefore(beforeId, recipient, ...nodes);\n  }\n\n  private _getPosition(\n    id: string,\n    ancestorsIndex: number[] = [],\n    values = this._data\n  ) {\n    let indexList: number[];\n    values.some((value, index) => {\n      if (this.getId(value) === id) {\n        indexList = ancestorsIndex.concat(index);\n        return true;\n      }\n\n      const children = this.getChildren(value);\n      if (children) {\n        const groupIndexList = this._getPosition(\n          id,\n          ancestorsIndex.concat(index),\n          children\n        );\n        if (groupIndexList) {\n          indexList = groupIndexList;\n          return true;\n        }\n      }\n\n      return false;\n    });\n    return indexList;\n  }\n\n  private getAncestorAtPosition(position: number[]) {\n    if (!position.length) {\n      return this._data;\n    }\n    const node = this.getNodeByPosition(position);\n    return this.getChildren(node);\n  }\n\n  /** Recursive */\n  private sortDeep(data = this._data): T[] {\n    data.forEach((node) => {\n      const children = this.getChildren(node);\n      if (children) {\n        this.sortDeep(children);\n      }\n    });\n    return this.sort(data);\n  }\n\n  private sort(children: T[]): T[] {\n    const sorted = children.sort((a, b) => this.getLevel(a) - this.getLevel(b));\n    return this.config.reverse ? sorted.reverse() : sorted;\n  }\n\n  /** Recursive */\n  private _getNodeById(id: string, data = this._data): T {\n    let node: T;\n    data.some((item) => {\n      if (this.getId(item) === id) {\n        node = item;\n        return true;\n      }\n\n      const children = this.getChildren(item);\n      if (children) {\n        node = this._getNodeById(id, children);\n        if (node) {\n          return true;\n        }\n      }\n\n      return false;\n    });\n    return node;\n  }\n\n  getNodeByPosition(indexes: number[]): T {\n    if (indexes.length > 1) {\n      return indexes.reduce((previousValue: T, index) => {\n        const ancestor = previousValue\n          ? this.getChildren(previousValue)\n          : this._data;\n        return this._getByIndex(index, ancestor);\n      }, null);\n    } else {\n      return this._getByIndex(indexes[0]);\n    }\n  }\n\n  private _getByIndex(index: number, ancestor = this._data) {\n    return ancestor[index];\n  }\n\n  private getNodeAncestor(node: T): T[] {\n    const id = this.getId(node);\n    return this.getAncestorById(id);\n  }\n\n  /** Recursive */\n  private getAncestorById(id: string, data = this._data): T[] | undefined {\n    let ancestor: T[];\n    data.some((item) => {\n      if (this.getId(item) === id) {\n        ancestor = data;\n        return true;\n      }\n\n      const children = this.getChildren(item);\n      if (children) {\n        ancestor = this.getAncestorById(id, children);\n        if (ancestor) {\n          return true;\n        }\n      }\n\n      return false;\n    });\n    return ancestor;\n  }\n\n  /** Recursive */\n  private flatten(nodes: T[]): T[] {\n    return nodes.reduce((list, node) => {\n      const children = this.getChildren(node);\n      if (children) {\n        const flattened = this.flatten(children);\n        list.push(node, ...flattened);\n      } else {\n        list.push(node);\n      }\n      return list;\n    }, [] as T[]);\n  }\n\n  private getIndex(id: string, ancestor: T[]): number {\n    return ancestor.findIndex((node) => this.getId(node) === id);\n  }\n}\n"]}