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Copy pathcancelable.js
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262 lines (229 loc) · 9.27 KB
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Copy pathcancelable.js
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262 lines (229 loc) · 9.27 KB
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const StackTrace = require('stack-trace')
const Priority = require('./priority.js')
const Capsule = require('capsulable/src/capsule')
const _private = Capsule('private')
const Trace = ()=>{
let traceData = []
try{
let stack = StackTrace.get()
for(let stackItem of stack){
let traceItem = {
text: '',
fileName: '',
lineNumber: null,
columnNumber: null,
typeName: '',
functionName: ''
}
try{
traceItem.text = stackItem.toString()
traceItem.fileName = stackItem.getFileName()
traceItem.lineNumber = stackItem.getLineNumber()
traceItem.columnNumber = stackItem.getColumnNumber()
traceItem.typeName = stackItem.getTypeName()
traceItem.functionName = stackItem.getFunctionName()
}catch(e){}
traceData.push(traceItem)
}
}catch(e){}
return traceData
}
class Cancelable {
constructor(initOption = {}) {
if(typeof initOption.async == 'undefined')
initOption.async = false
if(typeof initOption.override == 'undefined')
initOption.override = true
if(typeof initOption.trace == 'undefined')
initOption.trace = true
this._extendedDepth = -1
let traces = Trace()
for(let traceIndex in traces){
let trace = traces[traceIndex]
if(trace.fileName == __filename
&& trace.functionName == String('Cancelable')){
this._extendedDepth = String(traceIndex)
break
}
}
/**
* @description
* Configure a Private variable
*/
_private.set(this, 'listeners', {})
_private.set(this, 'asyncListeners', {})
_private.set(this, 'override', initOption.override)
_private.set(this, 'async', initOption.async)
_private.set(this, 'trace', initOption.trace)
/**
* @description
* Configure a Private Function
*/
// Configure a Private Emit Function
_private.set(this, 'emit', (eventName, param, callback, option={})=>{
let _listeners = _private.get(this, 'listeners')
if(typeof option != 'object' || Array.isArray(option))
option = {}
let currentParam = param
let traceData = {
stopper: null,
override: [],
listeners: []
}
if(typeof eventName != 'string' || eventName.length == 0){
if(typeof callback === 'function') callback(false, currentParam)
return false
}
// ASYNCHRONUS WORKS
let _asyncListeners = _private.get(this, 'asyncListeners')
if (typeof _asyncListeners[eventName] !== 'undefined'){
for (let asyncListener of _asyncListeners[eventName])
asyncListener(param)
}
// SYNCHRONUS WORK
if (typeof _listeners[eventName] === 'undefined'){
if(typeof callback === 'function') callback(false, currentParam)
return true
}
let listeners = _listeners[eventName]
let isCancelled = false
let override = (modifiedParam)=>{
if(!_private.get(this, 'override')) return
let beforeParam = currentParam
currentParam = modifiedParam
if(typeof option['trace'] != 'undefined' && option['trace'] && _private.get(this, 'trace')){
let traceItem = Trace()
if(this._extendedDepth == -1 || (typeof option['deep'] != 'undefined' && option['deep'])){
traceData.override.push(traceItem)
}else{
let sourceIndex = String(Number(this._extendedDepth)+1)
if(typeof traceItem[sourceIndex] != 'undefined'){
traceItem[sourceIndex].isModified = beforeParam != currentParam
if(beforeParam != currentParam){
traceItem[sourceIndex].before = beforeParam
traceItem[sourceIndex].after = modifiedParam
}
traceData.override.push(traceItem[sourceIndex])
}
}
}
}
for (let priority = 6; priority >= 0; priority--) {
if(isCancelled) break
if(!listeners[priority]) continue
for (let key in listeners[priority]){
let response = listeners[priority][key]['callback'](currentParam, override)
if(_private.get(this, 'trace')){
if(typeof option['trace'] != 'undefined' && option['trace']){
if(this._extendedDepth == -1 || typeof option['deep'] != 'undefined' && option['deep']){
traceData.listeners.push(listeners[priority][key]['deep'])
}else{
traceData.listeners.push(listeners[priority][key]['trace'])
}
}
}
if(response === false){
if(_private.get(this, 'trace')){
if(this._extendedDepth == -1 || typeof option['deep'] != 'undefined' && option['deep']){
traceData.stopper = listeners[priority][key]['deep']
}else{
traceData.stopper = listeners[priority][key]['trace']
}
}
isCancelled = true
break
}
}
}
if(typeof callback === 'function')
callback(isCancelled, currentParam, traceData)
return true
})
// Configure a Private addListener Function
_private.set(this, 'addListener', (eventName, callback, priority = null)=>{
if(typeof callback !== 'function') return false
if(!_private.get(this, 'async') && priority == -1)
priority = Priority.normal
let queryPriority = Priority.normal
if (priority !== null) queryPriority = String(priority)
// If the priority is -1, It will be
// add it as an asynchronous listener.
if(queryPriority == -1){
let _asyncListeners = _private.get(this, 'asyncListeners')
if (!_asyncListeners[eventName])
_asyncListeners[eventName] = []
_asyncListeners[eventName].push(callback)
_private.set(this, 'asyncListeners', _asyncListeners)
}else{
let _listeners = _private.get(this, 'listeners')
let listener = {
callback,
deep: Trace(),
trace: null
}
if(this._extendedDepth != -1){
let traceIndex = String(Number(this._extendedDepth)+2)
if(typeof listener.deep[traceIndex] != 'undefined')
listener.trace = listener.deep[traceIndex]
}
if (!_listeners[eventName])
_listeners[eventName] = {}
if (!_listeners[eventName][queryPriority])
_listeners[eventName][queryPriority] = []
_listeners[eventName][queryPriority].push(listener)
_private.set(this, 'listeners', _listeners)
}
return true
})
}
get priority (){
return Priority
}
/**
* @callback eventCallback
* @param {object} param
*/
/**
* @param {string} eventName
* @param {eventCallback} callback
* @param {integer} priority
*/
on(eventName, callback, priority = null){
return _private.get(this, 'addListener')(eventName, callback, priority)
}
/**
* @callback eventCallback
* @param {object} param
*/
/**
* @param {string} eventName
* @param {eventCallback} callback
* @param {integer} priority
*/
addListener(eventName, callback, priority = null){
return _private.get(this, 'addListener')(eventName, callback, priority)
}
/**
* @callback emitCallback
* @param {boolean} isCancelled
* @param {object} overridedParam
*/
/**
* @param {string} eventName
* @param {object} param
* @param {emitCallback} callback
* @param {boolean} needTrace
*/
emit(eventName, param, callback, option={}){
return _private.get(this, 'emit')(eventName, param, callback, option)
}
eventNames(){
let collectedNames = []
for(let name of Object.keys(_private.get(this, 'listeners')))
collectedNames[name] = true
for(let name of Object.keys(_private.get(this, 'asyncListeners')))
collectedNames[name] = true
return Object.keys(collectedNames)
}
}
module.exports = Cancelable