Current File : //lib/node_modules/npm/node_modules/readable-stream/lib/internal/streams/destroy.js
'use strict'; // undocumented cb() API, needed for core, not for public API
function destroy(err, cb) {
var _this = this;
var readableDestroyed = this._readableState && this._readableState.destroyed;
var writableDestroyed = this._writableState && this._writableState.destroyed;
if (readableDestroyed || writableDestroyed) {
if (cb) {
cb(err);
} else if (err) {
if (!this._writableState) {
process.nextTick(emitErrorNT, this, err);
} else if (!this._writableState.errorEmitted) {
this._writableState.errorEmitted = true;
process.nextTick(emitErrorNT, this, err);
}
}
return this;
} // we set destroyed to true before firing error callbacks in order
// to make it re-entrance safe in case destroy() is called within callbacks
if (this._readableState) {
this._readableState.destroyed = true;
} // if this is a duplex stream mark the writable part as destroyed as well
if (this._writableState) {
this._writableState.destroyed = true;
}
this._destroy(err || null, function (err) {
if (!cb && err) {
if (!_this._writableState) {
process.nextTick(emitErrorAndCloseNT, _this, err);
} else if (!_this._writableState.errorEmitted) {
_this._writableState.errorEmitted = true;
process.nextTick(emitErrorAndCloseNT, _this, err);
} else {
process.nextTick(emitCloseNT, _this);
}
} else if (cb) {
process.nextTick(emitCloseNT, _this);
cb(err);
} else {
process.nextTick(emitCloseNT, _this);
}
});
return this;
}
function emitErrorAndCloseNT(self, err) {
emitErrorNT(self, err);
emitCloseNT(self);
}
function emitCloseNT(self) {
if (self._writableState && !self._writableState.emitClose) return;
if (self._readableState && !self._readableState.emitClose) return;
self.emit('close');
}
function undestroy() {
if (this._readableState) {
this._readableState.destroyed = false;
this._readableState.reading = false;
this._readableState.ended = false;
this._readableState.endEmitted = false;
}
if (this._writableState) {
this._writableState.destroyed = false;
this._writableState.ended = false;
this._writableState.ending = false;
this._writableState.finalCalled = false;
this._writableState.prefinished = false;
this._writableState.finished = false;
this._writableState.errorEmitted = false;
}
}
function emitErrorNT(self, err) {
self.emit('error', err);
}
function errorOrDestroy(stream, err) {
// We have tests that rely on errors being emitted
// in the same tick, so changing this is semver major.
// For now when you opt-in to autoDestroy we allow
// the error to be emitted nextTick. In a future
// semver major update we should change the default to this.
var rState = stream._readableState;
var wState = stream._writableState;
if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);
}
module.exports = {
destroy: destroy,
undestroy: undestroy,
errorOrDestroy: errorOrDestroy
};
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