110 lines
2.4 KiB
JavaScript
110 lines
2.4 KiB
JavaScript
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// A writer for when we don't know what kind of thing
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// the thing is. That is, it's not explicitly set,
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// so we're going to make it whatever the thing already
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// is, or "File"
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//
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// Until then, collect all events.
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module.exports = ProxyWriter
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var Writer = require("./writer.js")
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, getType = require("./get-type.js")
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, inherits = require("inherits")
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, collect = require("./collect.js")
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, fs = require("fs")
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inherits(ProxyWriter, Writer)
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function ProxyWriter (props) {
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var me = this
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if (!(me instanceof ProxyWriter)) throw new Error(
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"ProxyWriter must be called as constructor.")
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me.props = props
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me._needDrain = false
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Writer.call(me, props)
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}
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ProxyWriter.prototype._stat = function () {
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var me = this
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, props = me.props
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// stat the thing to see what the proxy should be.
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, 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 = me.type = type
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me._old = current
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me._addProxy(Writer(props, current))
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})
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}
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ProxyWriter.prototype._addProxy = function (proxy) {
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// console.error("~~ set proxy", this.path)
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var me = this
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if (me._proxy) {
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return me.error("proxy already set")
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}
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me._proxy = proxy
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; [ "ready"
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, "error"
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, "close"
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, "pipe"
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, "drain"
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, "warn"
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].forEach(function (ev) {
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proxy.on(ev, me.emit.bind(me, ev))
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})
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me.emit("proxy", proxy)
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var calls = me._buffer
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calls.forEach(function (c) {
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// console.error("~~ ~~ proxy buffered call", c[0], c[1])
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proxy[c[0]].apply(proxy, c[1])
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})
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me._buffer.length = 0
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if (me._needsDrain) me.emit("drain")
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}
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ProxyWriter.prototype.add = function (entry) {
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// console.error("~~ proxy add")
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collect(entry)
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if (!this._proxy) {
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this._buffer.push(["add", [entry]])
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this._needDrain = true
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return false
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}
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return this._proxy.add(entry)
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}
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ProxyWriter.prototype.write = function (c) {
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// console.error("~~ proxy write")
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if (!this._proxy) {
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this._buffer.push(["write", [c]])
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this._needDrain = true
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return false
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}
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return this._proxy.write(c)
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}
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ProxyWriter.prototype.end = function (c) {
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// console.error("~~ proxy end")
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if (!this._proxy) {
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this._buffer.push(["end", [c]])
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return false
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}
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return this._proxy.end(c)
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}
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