understream - npm Package Compare versions

Comparing version 0.4.10 to 0.5.0

lib-js/understream.js

 // Generated by CoffeeScript 1.6.3
-var ArrayStream, DevNull, EventEmitter, Readable, Understream, Writable, construct, debug, domain, fs, is_readable, _,
+var ArrayStream, DevNull, EventEmitter, PassThrough, Readable, StreamCombiner, Understream, Writable, debug, domain, fs, is_readable, pipe_streams_together, _, _ref,
+  __slice = [].slice,
   __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
@@ -7,3 +8,3 @@ __hasProp = {}.hasOwnProperty,
 
-Writable = require('readable-stream').Writable;
+_ref = require('readable-stream'), Writable = _ref.Writable, PassThrough = _ref.PassThrough;
 
@@ -23,14 +24,45 @@ Readable = require('readable-stream');
 is_readable = function(instance) {
-  return (instance != null) && _.isObject(instance) && instance instanceof EventEmitter && ((instance != null ? instance.pipe : void 0) != null);
+  return (instance != null) && _.isObject(instance) && instance instanceof EventEmitter && (instance.pipe != null);
 };
 
-construct = function(constructor, args) {
-  var F;
-  F = function() {
-    return constructor.apply(this, args);
-  };
-  F.prototype = constructor.prototype;
-  return new F();
+pipe_streams_together = function() {
+  var i, streams, _i, _ref1, _results;
+  streams = 1 <= arguments.length ? __slice.call(arguments, 0) : [];
+  if (streams.length < 2) {
+    return;
+  }
+  _results = [];
+  for (i = _i = 0, _ref1 = streams.length - 2; 0 <= _ref1 ? _i <= _ref1 : _i >= _ref1; i = 0 <= _ref1 ? ++_i : --_i) {
+    _results.push(streams[i].pipe(streams[i + 1]));
+  }
+  return _results;
 };
 
+StreamCombiner = (function(_super) {
+  __extends(StreamCombiner, _super);
+
+  function StreamCombiner() {
+    var streams,
+      _this = this;
+    streams = 1 <= arguments.length ? __slice.call(arguments, 0) : [];
+    this.pipe = __bind(this.pipe, this);
+    StreamCombiner.__super__.constructor.call(this, {
+      objectMode: true
+    });
+    this.head = streams[0];
+    this.tail = streams[streams.length - 1];
+    pipe_streams_together.apply(null, streams);
+    this.on('pipe', function(source) {
+      return source.unpipe(_this).pipe(_this.head);
+    });
+  }
+
+  StreamCombiner.prototype.pipe = function(dest, options) {
+    return this.tail.pipe(dest, options);
+  };
+
+  return StreamCombiner;
+
+})(PassThrough);
+
 ArrayStream = (function(_super) {
@@ -77,5 +109,7 @@ __extends(ArrayStream, _super);
 Understream = (function() {
-  function Understream(read_stream) {
-    this.read_stream = read_stream;
+  function Understream(head) {
+    this.pipe = __bind(this.pipe, this);
     this.stream = __bind(this.stream, this);
+    this.duplex = __bind(this.duplex, this);
+    this.readable = __bind(this.readable, this);
     this.run = __bind(this.run, this);
@@ -87,9 +121,9 @@ this.defaults = __bind(this.defaults, this);
     };
-    if (_(this.read_stream).isArray()) {
-      this.read_stream = new ArrayStream({}, this.read_stream);
-      this.read_streams = [this.read_stream];
-    } else if (is_readable(this.read_stream)) {
-      this.read_streams = [this.read_stream];
-    } else if (this.read_stream == null) {
-      this.read_streams = [];
+    if (_(head).isArray()) {
+      head = new ArrayStream({}, head);
+    }
+    if (is_readable(head)) {
+      this._streams = [head];
+    } else if (head == null) {
+      this._streams = [];
     } else {
@@ -105,3 +139,3 @@ throw new Error('Understream expects a readable stream, an array, or nothing');
   Understream.prototype.run = function(cb) {
-    var dmn, interval, report, stream, _i, _len, _ref,
+    var dmn, handler, interval, report, stream, _i, _len, _ref1,
       _this = this;
@@ -114,5 +148,5 @@ if (!_(cb).isFunction()) {
       str = '';
-      _(_this.read_streams).each(function(stream) {
-        var _ref, _ref1;
-        return str += "" + stream.constructor.name + "(" + (((_ref = stream._writableState) != null ? _ref.length : void 0) || '') + " " + (((_ref1 = stream._readableState) != null ? _ref1.length : void 0) || '') + ") ";
+      _(_this._streams).each(function(stream) {
+        var _ref1, _ref2;
+        return str += "" + stream.constructor.name + "(" + (((_ref1 = stream._writableState) != null ? _ref1.length : void 0) || '') + " " + (((_ref2 = stream._readableState) != null ? _ref2.length : void 0) || '') + ") ";
       });
@@ -122,34 +156,20 @@ return console.log(str);
     interval = setInterval(report, 5000);
-    if (_(this.read_streams).last()._transform != null) {
-      this.read_streams.push(new DevNull());
+    if (_(this._streams).last()._transform != null) {
+      this._streams.push(new DevNull());
     }
-    _(this.read_streams).last().on('finish', function() {
-      clearInterval(interval);
-      return cb();
-    });
     dmn = domain.create();
-    dmn.on('error', function(err) {
+    handler = function(err) {
       clearInterval(interval);
       return cb(err);
-    });
-    _ref = this.read_streams;
-    for (_i = 0, _len = _ref.length; _i < _len; _i++) {
-      stream = _ref[_i];
+    };
+    _(this._streams).last().on('finish', handler);
+    dmn.on('error', handler);
+    _ref1 = this._streams;
+    for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
+      stream = _ref1[_i];
       dmn.add(stream);
     }
     dmn.run(function() {
-      var _j, _ref1, _results;
       debug('running');
-      if (!(_this.read_streams.length > 1)) {
-        return;
-      }
-      return _((function() {
-        _results = [];
-        for (var _j = 0, _ref1 = _this.read_streams.length - 2; 0 <= _ref1 ? _j <= _ref1 : _j >= _ref1; 0 <= _ref1 ? _j++ : _j--){ _results.push(_j); }
-        return _results;
-      }).apply(this)).each(function(i) {
-        var _ref1, _ref2;
-        debug('piping', (_ref1 = _this.read_streams[i]) != null ? _ref1.constructor.name : void 0, '-->', (_ref2 = _this.read_streams[i + 1]) != null ? _ref2.constructor.name : void 0);
-        return _this.read_streams[i].pipe(_this.read_streams[i + 1]);
-      });
+      return pipe_streams_together.apply(null, _this._streams);
     });
@@ -159,9 +179,27 @@ return this;
 
+  Understream.prototype.readable = function() {
+    pipe_streams_together.apply(null, this._streams);
+    return this._streams[this._streams.length - 1];
+  };
+
+  Understream.prototype.duplex = function() {
+    return (function(func, args, ctor) {
+      ctor.prototype = func.prototype;
+      var child = new ctor, result = func.apply(child, args);
+      return Object(result) === result ? result : child;
+    })(StreamCombiner, this._streams, function(){});
+  };
+
   Understream.prototype.stream = function() {
-    return this.read_stream;
+    return this.readable();
   };
 
-  Understream.mixin = function(FunctionOrReadableStreamKlass, name, fn) {
+  Understream.prototype.pipe = function(stream_instance) {
+    this._streams.push(stream_instance);
+    return this;
+  };
+
+  Understream.mixin = function(FunctionOrStreamKlass, name, fn) {
     if (name == null) {
-      name = Readable.name;
+      name = FunctionOrStreamKlass.name || Readable.name;
     }
@@ -173,18 +211,21 @@ if (fn == null) {
       var args, instance;
+      args = 1 <= arguments.length ? __slice.call(arguments, 0) : [];
       if (fn) {
-        instance = FunctionOrReadableStreamKlass.apply(null, arguments);
+        instance = FunctionOrStreamKlass.apply(null, args);
       } else {
-        args = _(arguments).toArray();
-        if (args.length < FunctionOrReadableStreamKlass.length) {
-          args = [_(this.defaults).clone()].concat(args);
-        } else if (args.length === FunctionOrReadableStreamKlass.length) {
+        if (args.length < FunctionOrStreamKlass.length) {
+          args.unshift(_(this.defaults).clone());
+        } else if (args.length === FunctionOrStreamKlass.length) {
           _(args[0]).defaults(this.defaults);
         } else {
-          throw new Error("Expected " + FunctionOrReadableStreamKlass.length + " or " + (FunctionOrReadableStreamKlass.length - 1) + " arguments to " + name + ", got " + args.length);
+          throw new Error("Expected " + FunctionOrStreamKlass.length + " or " + (FunctionOrStreamKlass.length - 1) + " arguments to " + name + ", got " + args.length);
         }
-        instance = construct(FunctionOrReadableStreamKlass, args);
+        instance = (function(func, args, ctor) {
+          ctor.prototype = func.prototype;
+          var child = new ctor, result = func.apply(child, args);
+          return Object(result) === result ? result : child;
+        })(FunctionOrStreamKlass, args, function(){});
       }
-      this.read_stream = instance;
-      this.read_streams.push(this.read_stream);
-      debug('created', this.read_stream.constructor.name, this.read_streams.length);
+      this.pipe(instance);
+      debug('created', instance.constructor.name, this._streams.length);
       return this;
@@ -200,7 +241,6 @@ };
   return _(fs.readdirSync(dir)).each(function(filename) {
-    var match;
-    match = filename.match(new RegExp("^([^\.]\\S+)\\.js$"));
-    if (match) {
-      return require("" + dir + "/" + filename)(Understream);
+    if (!new RegExp("^([^\\.]\\S+)\\.js$").test(filename)) {
+      return;
     }
+    return require("" + dir + "/" + filename)(Understream);
   });
@@ -212,4 +252,4 @@ });
     return {
-      stream: function(read_stream) {
-        return new Understream(read_stream);
+      stream: function(head) {
+        return new Understream(head);
       }
@@ -216,0 +256,0 @@ };

package.json

 {
   "name": "understream",
-  "version": "0.4.10",
+  "version": "0.5.0",
   "description": "stream helpers",
@@ -5,0 +5,0 @@ "engines": {

New alerts

Unidentified License

License

(Experimental) Something that seems like a license was found, but its contents could not be matched with a known license.

Found 1 instance in 1 package

Fixed alerts

Unidentified License

License

(Experimental) Something that seems like a license was found, but its contents could not be matched with a known license.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

89392

3.87%

Number of package files

70

1.45%

Lines of code

996

3.32%

No dependency changes