export default class EventEmitter
|
{
|
constructor()
|
{
|
this.callbacks = {}
|
this.callbacks.base = {}
|
}
|
|
on(_names, callback)
|
{
|
// Errors
|
if(typeof _names === 'undefined' || _names === '')
|
{
|
console.warn('wrong names')
|
return false
|
}
|
|
if(typeof callback === 'undefined')
|
{
|
console.warn('wrong callback')
|
return false
|
}
|
|
// Resolve names
|
const names = this.resolveNames(_names)
|
|
// Each name
|
names.forEach((_name) =>
|
{
|
// Resolve name
|
const name = this.resolveName(_name)
|
|
// Create namespace if not exist
|
if(!(this.callbacks[ name.namespace ] instanceof Object))
|
this.callbacks[ name.namespace ] = {}
|
|
// Create callback if not exist
|
if(!(this.callbacks[ name.namespace ][ name.value ] instanceof Array))
|
this.callbacks[ name.namespace ][ name.value ] = []
|
|
// Add callback
|
this.callbacks[ name.namespace ][ name.value ].push(callback)
|
})
|
|
return this
|
}
|
|
off(_names)
|
{
|
// Errors
|
if(typeof _names === 'undefined' || _names === '')
|
{
|
console.warn('wrong name')
|
return false
|
}
|
|
// Resolve names
|
const names = this.resolveNames(_names)
|
|
// Each name
|
names.forEach((_name) =>
|
{
|
// Resolve name
|
const name = this.resolveName(_name)
|
|
// Remove namespace
|
if(name.namespace !== 'base' && name.value === '')
|
{
|
delete this.callbacks[ name.namespace ]
|
}
|
|
// Remove specific callback in namespace
|
else
|
{
|
// Default
|
if(name.namespace === 'base')
|
{
|
// Try to remove from each namespace
|
for(const namespace in this.callbacks)
|
{
|
if(this.callbacks[ namespace ] instanceof Object && this.callbacks[ namespace ][ name.value ] instanceof Array)
|
{
|
delete this.callbacks[ namespace ][ name.value ]
|
|
// Remove namespace if empty
|
if(Object.keys(this.callbacks[ namespace ]).length === 0)
|
delete this.callbacks[ namespace ]
|
}
|
}
|
}
|
|
// Specified namespace
|
else if(this.callbacks[ name.namespace ] instanceof Object && this.callbacks[ name.namespace ][ name.value ] instanceof Array)
|
{
|
delete this.callbacks[ name.namespace ][ name.value ]
|
|
// Remove namespace if empty
|
if(Object.keys(this.callbacks[ name.namespace ]).length === 0)
|
delete this.callbacks[ name.namespace ]
|
}
|
}
|
})
|
|
return this
|
}
|
|
trigger(_name, _args)
|
{
|
// Errors
|
if(typeof _name === 'undefined' || _name === '')
|
{
|
console.warn('wrong name')
|
return false
|
}
|
|
let finalResult = null
|
let result = null
|
|
// Default args
|
const args = !(_args instanceof Array) ? [] : _args
|
|
// Resolve names (should on have one event)
|
let name = this.resolveNames(_name)
|
|
// Resolve name
|
name = this.resolveName(name[ 0 ])
|
|
// Default namespace
|
if(name.namespace === 'base')
|
{
|
// Try to find callback in each namespace
|
for(const namespace in this.callbacks)
|
{
|
if(this.callbacks[ namespace ] instanceof Object && this.callbacks[ namespace ][ name.value ] instanceof Array)
|
{
|
this.callbacks[ namespace ][ name.value ].forEach(function(callback)
|
{
|
result = callback.apply(this, args)
|
|
if(typeof finalResult === 'undefined')
|
{
|
finalResult = result
|
}
|
})
|
}
|
}
|
}
|
|
// Specified namespace
|
else if(this.callbacks[ name.namespace ] instanceof Object)
|
{
|
if(name.value === '')
|
{
|
console.warn('wrong name')
|
return this
|
}
|
|
this.callbacks[ name.namespace ][ name.value ].forEach(function(callback)
|
{
|
result = callback.apply(this, args)
|
|
if(typeof finalResult === 'undefined')
|
finalResult = result
|
})
|
}
|
|
return finalResult
|
}
|
|
resolveNames(_names)
|
{
|
let names = _names
|
names = names.replace(/[^a-zA-Z0-9 ,/.]/g, '')
|
names = names.replace(/[,/]+/g, ' ')
|
names = names.split(' ')
|
|
return names
|
}
|
|
resolveName(name)
|
{
|
const newName = {}
|
const parts = name.split('.')
|
|
newName.original = name
|
newName.value = parts[ 0 ]
|
newName.namespace = 'base' // Base namespace
|
|
// Specified namespace
|
if(parts.length > 1 && parts[ 1 ] !== '')
|
{
|
newName.namespace = parts[ 1 ]
|
}
|
|
return newName
|
}
|
}
|
