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283 lines (249 loc) · 6.49 KB
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const {properties} = require('./config')
const {getContext} = require('./utils')
const PRIVATE_PROPERTIES = [properties.node_id, properties.parent_id, properties.next_id, properties.prev_id, properties.depth]
class Node {
/**
* @param {Object} node
* @param {Nested|null} tree_uniqueid
*/
constructor(node = {}, tree_uniqueid = null) {
this._properties = this._mapProperties(node)
this._tree_uniqueid = tree_uniqueid
}
/**
* Return node properties
* @returns {Object}
*/
get properties() {
return this._properties
}
/**
* Check if node property exists
* @param {String} key
* @returns {boolean}
*/
hasProperty(key) {
return this._properties[key] !== undefined
}
/**
* Returns node property if exists, defaultValue otherwise
* @param {String} key
* @param {*} defaultValue
* @returns {*}
*/
getProperty(key, defaultValue = null) {
return this._properties[key] || defaultValue
}
/**
* Set node property
* @param {String} key
* @param {*} value
*/
setProperty(key, value) {
this._properties[key] = value
}
/**
* Returns node unique id
* @returns {String}
*/
getId() {
return this.getProperty(properties.node_id)
}
/**
* Returns node parent unique id
* @returns {String|null}
*/
getParentId() {
return this.getProperty(properties.parent_id)
}
/**
* Returns previous node unique id
* @returns {String|null}
*/
getPreviousId() {
return this.getProperty(properties.prev_id)
}
/**
* Returns next node unique id
* @returns {String|null}
*/
getNextId() {
return this.getProperty(properties.next_id)
}
/**
* Returns root node unique id
* @returns {String|null}
*/
getRootId() {
return this.getProperty(properties.root_id)
}
/**
* Returns an array of child nodes
* @returns {Node[]}
*/
childNodes() {
return this.getProperty(this.getTree().options.children_key, [])
}
/**
* Returns an array of previous nodes if exists, null otherwise
* @returns {Node[]|null}
*/
previousNodes() {
let instance = this.getTree()
return instance !== null ? instance.getPreviousNodes(this) : null
}
/**
* Returns previous node if exists, null otherwise
* @returns {Node|null}
*/
previousNode() {
let instance = this.getTree()
return instance !== null ? instance.getPreviousNode(this) : null
}
/**
* Returns an array of next nodes if exists, null otherwise
* @returns {Node[]|null}
*/
nextNodes() {
let instance = this.getTree()
return instance !== null ? instance.getNextNodes(this) : null
}
/**
* Returns next node if exists, null otherwise
* @returns {Node|null}
*/
nextNode() {
let instance = this.getTree()
return instance !== null ? instance.getNextNode(this) : null
}
/**
* Returns parent node if exists, null otherwise
* @returns {Node|null}
*/
parentNode() {
let instance = this.getTree()
return instance !== null ? instance.getParentNode(this) : null
}
/**
* Returns parent node if exists, null otherwise
* @returns {Node|null}
*/
rootNode() {
let instance = this.getTree()
return instance !== null ? instance.getRootNode(this) : null
}
/**
* Returns an array of siblings nodes if exists, null otherwise
* @returns {Node[]|null}
*/
siblingsNodes() {
let instance = this.getTree()
return instance !== null ? instance.getSiblingsNodes(this) : null
}
/**
* Returns Nested instance
* @returns {Nested|null}
*/
getTree() {
return getContext(this._tree_uniqueid)
}
/**
* Returns current node breadcrumb
* @returns {Node[]|Array}
*/
breadcrumb() {
let instance = this.getTree()
if (instance !== null)
return instance.getBreadcrumb(this).reverse()
return []
}
/**
* Returns node first child if exists, null otherwise
* @returns {Node|null}
*/
firstChild() {
if (!this.hasChildNodes()) return null
const children = this.childNodes()
return children && children.length ? children[0] : null
}
/**
* Returns node last child if exists, null otherwise
* @returns {Node|null}
*/
lastChild() {
if (!this.hasChildNodes()) return null
const children = this.childNodes()
return children && children.length ? children[children.length - 1] : null
}
/**
* Returns node child by index if exists, null otherwise
* @returns {Node|null}
*/
nthChild(index) {
if (!this.hasChildNodes()) return null
const children = this.childNodes()
return children && children.length ? children[index] : null
}
/**
* Count node childs
* @returns {Number}
*/
countChildren() {
if (!this.hasChildNodes()) return 0
return this.childNodes().length
}
/**
* @returns {Boolean}
*/
hasChildNodes() {
const children = this.childNodes()
return Boolean(children !== undefined && children !== null && children.length > 0)
}
/**
* @returns {Boolean}
*/
hasParentNode() {
return Boolean(this.getParentId() !== null)
}
/**
* @returns {Boolean}
*/
hasPreviousNode() {
return Boolean(this.getPreviousId() !== null)
}
/**
* @returns {Boolean}
*/
hasNextNode() {
return Boolean(this.getNextId() !== null)
}
/**
* @returns {Boolean}
*/
hasRootNode() {
return Boolean(this.getRootId() !== null)
}
/**
* Returns node depth
* @returns {Number}
*/
depth() {
return this.getProperty(properties.depth) || 0
}
/**
* Map node properties
* @param {Object} properties
* @returns {Object}
* @private
*/
_mapProperties(properties) {
for (let property_name in properties) {
if (properties.hasOwnProperty(property_name)) {
if (!this[property_name] && !PRIVATE_PROPERTIES.includes(property_name))
this[property_name] = properties[property_name]
}
}
return properties
}
}
module.exports = Node