95 lines
2 KiB
JavaScript
95 lines
2 KiB
JavaScript
// A reader for when we don't yet know what kind of thing
|
|
// the thing is.
|
|
|
|
module.exports = ProxyReader
|
|
|
|
var Reader = require('./reader.js')
|
|
var getType = require('./get-type.js')
|
|
var inherits = require('inherits')
|
|
var fs = require('graceful-fs')
|
|
|
|
inherits(ProxyReader, Reader)
|
|
|
|
function ProxyReader (props) {
|
|
var self = this
|
|
if (!(self instanceof ProxyReader)) {
|
|
throw new Error('ProxyReader must be called as constructor.')
|
|
}
|
|
|
|
self.props = props
|
|
self._buffer = []
|
|
self.ready = false
|
|
|
|
Reader.call(self, props)
|
|
}
|
|
|
|
ProxyReader.prototype._stat = function () {
|
|
var self = this
|
|
var props = self.props
|
|
// stat the thing to see what the proxy should be.
|
|
var stat = props.follow ? 'stat' : 'lstat'
|
|
|
|
fs[stat](props.path, function (er, current) {
|
|
var type
|
|
if (er || !current) {
|
|
type = 'File'
|
|
} else {
|
|
type = getType(current)
|
|
}
|
|
|
|
props[type] = true
|
|
props.type = self.type = type
|
|
|
|
self._old = current
|
|
self._addProxy(Reader(props, current))
|
|
})
|
|
}
|
|
|
|
ProxyReader.prototype._addProxy = function (proxy) {
|
|
var self = this
|
|
if (self._proxyTarget) {
|
|
return self.error('proxy already set')
|
|
}
|
|
|
|
self._proxyTarget = proxy
|
|
proxy._proxy = self
|
|
|
|
;[
|
|
'error',
|
|
'data',
|
|
'end',
|
|
'close',
|
|
'linkpath',
|
|
'entry',
|
|
'entryEnd',
|
|
'child',
|
|
'childEnd',
|
|
'warn',
|
|
'stat'
|
|
].forEach(function (ev) {
|
|
// console.error('~~ proxy event', ev, self.path)
|
|
proxy.on(ev, self.emit.bind(self, ev))
|
|
})
|
|
|
|
self.emit('proxy', proxy)
|
|
|
|
proxy.on('ready', function () {
|
|
// console.error("~~ proxy is ready!", self.path)
|
|
self.ready = true
|
|
self.emit('ready')
|
|
})
|
|
|
|
var calls = self._buffer
|
|
self._buffer.length = 0
|
|
calls.forEach(function (c) {
|
|
proxy[c[0]].apply(proxy, c[1])
|
|
})
|
|
}
|
|
|
|
ProxyReader.prototype.pause = function () {
|
|
return this._proxyTarget ? this._proxyTarget.pause() : false
|
|
}
|
|
|
|
ProxyReader.prototype.resume = function () {
|
|
return this._proxyTarget ? this._proxyTarget.resume() : false
|
|
}
|