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