futoin-asyncevent - npm Package Compare versions

Comparing version 1.0.2 to 1.1.0

CHANGELOG.txt

 
+=== 1.1.0 (2018-06-03) ===
+NEW: allow registration of additional events
+
 === 1.0.2 (2018-05-23) ===
@@ -3,0 +6,0 @@ FIXED: improved browser tests to use dist module

dist/futoin-asyncevent.js

@@ -1,1 +0,1 @@
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dist/polyfill-asyncevent.js

@@ -1,1 +0,1 @@
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es5/EventEmitter.js

@@ -254,4 +254,38 @@ 'use strict';
 
-            if (instance[SYM_EVENT_EMITTER] !== undefined) {
-                throw new Error('Already attached');
+            var old_ee = instance[SYM_EVENT_EMITTER];
+
+            if (old_ee !== undefined) {
+                old_ee._max = max_listeners;
+
+                var _iteratorNormalCompletion4 = true;
+                var _didIteratorError4 = false;
+                var _iteratorError4 = undefined;
+
+                try {
+                    for (var _iterator4 = allowed_events[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
+                        var evt = _step4.value;
+
+                        if ('' + ON_PREFIX + evt in old_ee) {
+                            throw new Error('Event "' + evt + '" has been already registered!');
+                        } else {
+                            old_ee['' + ON_PREFIX + evt] = [];
+                            old_ee['' + ONCE_PREFIX + evt] = [];
+                        }
+                    }
+                } catch (err) {
+                    _didIteratorError4 = true;
+                    _iteratorError4 = err;
+                } finally {
+                    try {
+                        if (!_iteratorNormalCompletion4 && _iterator4.return) {
+                            _iterator4.return();
+                        }
+                    } finally {
+                        if (_didIteratorError4) {
+                            throw _iteratorError4;
+                        }
+                    }
+                }
+
+                return;
             }
@@ -258,0 +292,0 @@

es5/test/unittest.js

@@ -22,9 +22,15 @@ 'use strict';
 
-        it("should fail on double invocation", function () {
+        it("should allow additional registrationk", function () {
             var o = {};
             $asyncevent(o, ['a', 'b', 'c']);
+            $asyncevent(o, ['d']);
+        });
 
+        it("should fail on double registration", function () {
+            var o = {};
+            $asyncevent(o, ['a', 'b', 'c']);
+
             expect(function () {
-                return $asyncevent(o, ['a', 'b', 'c']);
-            }).to.throw('Already attached');
+                return $asyncevent(o, ['b']);
+            }).to.throw('Event "b" has been already registered!');
         });
@@ -37,5 +43,7 @@ });
             $asyncevent(o, ['a', 'b', 'c']);
+            $asyncevent(o, ['d']);
             o.on('a', function () {});
             o.on('a', function () {});
             o.on('b', function () {});
+            o.on('d', function () {});
 
@@ -45,2 +53,3 @@ expect(o[SYM_EVENT_EMITTER]._evt_a.length).to.equal(2);
             expect(o[SYM_EVENT_EMITTER]._evt_c.length).to.equal(0);
+            expect(o[SYM_EVENT_EMITTER]._evt_d.length).to.equal(1);
         });
@@ -47,0 +56,0 @@

EventEmitter.js

@@ -145,4 +145,17 @@ 'use strict';
     static attach( instance, allowed_events, max_listeners=8 ) {
-        if ( instance[SYM_EVENT_EMITTER] !== undefined ) {
-            throw new Error( 'Already attached' );
+        const old_ee = instance[SYM_EVENT_EMITTER];
+
+        if ( old_ee !== undefined ) {
+            old_ee._max = max_listeners;
+
+            for ( let evt of allowed_events ) {
+                if ( `${ON_PREFIX}${evt}` in old_ee ) {
+                    throw new Error( `Event "${evt}" has been already registered!` );
+                } else {
+                    old_ee[`${ON_PREFIX}${evt}`] = [];
+                    old_ee[`${ONCE_PREFIX}${evt}`] = [];
+                }
+            }
+
+            return;
         }
@@ -149,0 +162,0 @@

package.json

 {
   "name": "futoin-asyncevent",
-  "version": "1.0.2",
+  "version": "1.1.0",
   "description": "FutoIn AsyncEvent - FTN15 compliant event emitter",
@@ -46,3 +46,3 @@ "main": "lib/asyncevent.js",
     "chai": "^4.1.2",
-    "core-js": "^2.5.6",
+    "core-js": "^2.5.7",
     "eslint": "^4.19.1",
@@ -60,4 +60,4 @@ "grunt": "^1.0.2",
     "mocha": "^5.2.0",
-    "webpack": "^4.8.3"
+    "webpack": "^4.10.2"
   }
 }

README.md

@@ -10,3 +10,14 @@
 **Stability: 3 - Stable**
+  
+# About
 
+Implementation of a well-known event emitter pattern, but with fundamental requirement: execute
+all events asynchronously - there must be no emitter functionality function frames on the stack.
+
+All other event emitters implementations are synchronous - they call handlers when event is emitted.
+
+Second important feature - strict check of preconfigured allowed event types.
+
+**Documentation** --> [FutoIn Guide](https://futoin.org/docs/miscjs/asyncevent/)
+
 Reference implementation of:
@@ -21,14 +32,3 @@
 
-[Web Site](http://futoin.org/)
 
-
-# About
-
-Implementation of a well-known event emitter pattern, but with fundamental requirement: execute
-all events asynchronously - there must be no emitter functionality function frames on the stack.
-
-All other event emitters implementations are synchronous - they call handlers when event is emitted.
-
-Second important feature - strict check of preconfigured allowed event types.
-
 # Extra details
@@ -125,2 +125,24 @@
 
+// Additional events in derived class
+// ----------------------------------
+class DerivedClass extends FirstClass {
+    constructor() {
+        super();
+        // Transparently checks, if EventEmitter has been already
+        // registered with other events
+        $asyncevent(this, ['another_event']);
+    }
+}
+
+// Fail on duplicate event names
+// ----------------------------------
+class FailClass extends FirstClass {
+    constructor() {
+        super();
+        // It's not allowed to override already registered event for
+        // safety reasons.
+        $asyncevent(this, ['event_one']);
+    }
+}
+
 ```
@@ -127,0 +149,0 @@

No alert changes

Improved metrics

Total package byte prevSize

125932

increased by4.49%

Lines of code

975

increased by5.06%

Number of lines in readme file

402

increased by5.79%

No dependency changes