Added AMD format build for postal, and included examples that match the jsfiddle usage example, one for standard, one for amd style

This commit is contained in:
Jim Cowart 2012-02-02 12:34:06 -05:00
parent 3de1a8335e
commit 14864b5135
33 changed files with 11665 additions and 5 deletions

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@ -1,6 +1,13 @@
#!/bin/sh
anvil -b build-browser.json
anvil -b build-browser-diags.json
anvil -b build-browser-standard.json
anvil -b build-browser-standard-diags.json
anvil -b build-browser-amd.json
anvil -b build-browser-amd-diags.json
anvil -b build-node.json
anvil -b build-node-diags.json
anvil -b build-node-diags.json
cp ./lib/browser/amd/postal.js ./example/amd/js/libs/postal/
cp ./lib/browser/amd/postal.diagnostics.js ./example/amd/js/libs/postal/
cp ./lib/browser/standard/postal.js ./example/standard/js/
cp ./lib/browser/standard/postal.diagnostics.js ./example/standard/js/

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{
"source": "src/diags",
"output": "lib/browser/amd",
"lint": {},
"uglify": {},
"gzip": {},
"extensions": { "uglify": "min", "gzip": "gz" },
"wrap": {
"prefix": "define(['postal', 'underscore'], function(postal, _) {",
"suffix": "});"
}
}

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build-browser-amd.json Normal file
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{
"source": "src/main",
"output": "lib/browser/amd",
"lint": {},
"uglify": {},
"gzip": {},
"extensions": { "uglify": "min", "gzip": "gz" },
"wrap": {
"prefix": "define(['underscore'], function(_) {",
"suffix": "return postal; });"
}
}

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{
"source": "src/diags",
"output": "lib/browser",
"output": "lib/browser/standard",
"lint": {},
"uglify": {},
"gzip": {},

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{
"source": "src/main",
"output": "lib/browser",
"output": "lib/browser/standard",
"lint": {},
"uglify": {},
"gzip": {},

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example/amd/index.html Normal file
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Postal Examples (AMD/require.js Lib Format)</title>
<link rel="stylesheet" type="text/css" href="style.css">
<script data-main="js/main" src="js/libs/require/require.js"></script>
</head>
<body>
<div>
Example 1 - The World's Simplest Subscription
<div class="results" id="example1"></div>
</div>
<div>
Example 2 - Subscribing with the "#" wildcard character
<ul class="results" id="example2"></ul>
</div>
<div>
Example 3 - Subscribing with the "*" wildcard character
<ul class="results" id="example3"></ul>
</div>
<div>
Example 4 - using ignoreDuplicates()
<ul class="results" id="example4"></ul>
</div>
<div>
Example 5 - using disposeAfter(X)
<ul class="results" id="example5"></ul>
</div>
<div>
Example 6 - using whenHandledThenExecute(X)
<ul class="results" id="example6"></ul>
</div>
<div>
Example 7 - using withConstraint() to apply a predicate to subscription callback
<ul class="results" id="example7"></ul>
</div>
<div>
Example 8 - using withContext to set the "this" context
<ul class="results" id="example8"></ul>
</div>
<div>
Example 9 - using withDelay to delay evaluation of subscription
<ul class="results" id="example9"></ul>
</div>
</body>
</html>

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example/amd/js/examples.js Normal file
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define(['postal', 'postaldiags'], function(postal, diags){
// The world's simplest subscription
var channel = postal.channel("Name.Changed");
// subscribe
var subscription = channel.subscribe(function(data) { $("#example1").html("Name: " + data.name); });
// And someone publishes a first name change:
channel.publish({ name: "Dr. Who" });
subscription.unsubscribe();
// Subscribing to a wildcard topic using #
// The # symbol represents "one word" in a topic (i.e - the text between two periods of a topic).
// By subscribing to "#.Changed", the binding will match
// Name.Changed & Location.Changed but *not* for Changed.Companion
var hashChannel = postal.channel("#.Changed"),
chgSubscription = hashChannel.subscribe(function(data) {
$('<li>' + data.type + " Changed: " + data.value + '</li>').appendTo("#example2");
});
postal.channel("Name.Changed")
.publish({ type: "Name", value:"John Smith" });
postal.channel("Location.Changed")
.publish({ type: "Location", value: "Early 20th Century England" });
chgSubscription.unsubscribe();
// Subscribing to a wildcard topic using *
// The * symbol represents any number of characters/words in a topic string.
// By subscribing to "DrWho.*.Changed", the binding will match
// DrWho.NinthDoctor.Companion.Changed & DrWho.Location.Changed but *not* Changed
var starChannel = postal.channel("DrWho.*.Changed"),
starSubscription = starChannel.subscribe(function(data) {
$('<li>' + data.type + " Changed: " + data.value + '</li>').appendTo("#example3");
});
postal.channel("DrWho.NinthDoctor.Companion.Changed")
.publish({ type: "Companion Name", value:"Rose" });
postal.channel("DrWho.TenthDoctor.Companion.Changed")
.publish({ type: "Companion Name", value:"Martha" });
postal.channel("DrWho.Eleventh.Companion.Changed")
.publish({ type: "Companion Name", value:"Amy" });
postal.channel("DrWho.Location.Changed")
.publish({ type: "Location", value: "The Library" });
postal.channel("TheMaster.DrumBeat.Changed")
.publish({ type: "DrumBeat", value: "This won't trigger any subscriptions" });
postal.channel("Changed")
.publish({ type: "Useless", value: "This won't trigger any subscriptions either" });
starSubscription.unsubscribe();
// Applying ignoreDuplicates to a subscription
var dupChannel = postal.channel("WeepingAngel.*"),
dupSubscription = dupChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example4");
}).ignoreDuplicates();
postal.channel("WeepingAngel.DontBlink")
.publish({ value:"Don't Blink" });
postal.channel("WeepingAngel.DontBlink")
.publish({ value:"Don't Blink" });
postal.channel("WeepingAngel.DontEvenBlink")
.publish({ value:"Don't Even Blink" });
postal.channel("WeepingAngel.DontBlink")
.publish({ value:"Don't Close Your Eyes" });
dupSubscription.unsubscribe();
// Using disposeAfter(X) to remove subscription automagically after X number of receives
var daChannel = postal.channel("Donna.Noble.*"),
daSubscription = daChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example5");
}).disposeAfter(2);
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
daSubscription.unsubscribe();
// Using whenHandledThenExecute() to invoke a function after handling a message
var whteChannel = postal.channel("Donna.Noble.*"),
whteSubscription = whteChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example6");
}).whenHandledThenExecute(function() {
$('<li>[Kind of a frivolous example...but this line resulted from the whenHandledThenExecute() callback]</li>').appendTo("#example6");
});
postal.channel("Donna.Noble.*")
.publish({ value:"Donna Noble has left the library." });
whteSubscription.unsubscribe();
// Using withConstraint to apply a predicate to the subscription
var drIsInTheTardis = false,
wcChannel = postal.channel("Tardis.Depart"),
wcSubscription = wcChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example7");
}).withConstraint(function() { return drIsInTheTardis; } );
postal.channel("Tardis.Depart")
.publish({ value:"Time for time travel....fantastic!" });
postal.channel("Tardis.Depart")
.publish({ value:"Time for time travel....fantastic!" });
drIsInTheTardis = true;
postal.channel("Tardis.Depart")
.publish({ value:"Time for time travel....fantastic!" });
wcSubscription.unsubscribe();
// Using withContext to set the "this" context
var ctxChannel = postal.channel("Dalek.Meet.CyberMen"),
ctxSubscription = ctxChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo(this);
}).withContext($("#example8"));
postal.channel("Dalek.Meet.CyberMen")
.publish({ value:"Exterminate!" });
postal.channel("Dalek.Meet.CyberMen")
.publish({ value:"Delete!" });
ctxSubscription.unsubscribe();
// Using withDelay() to delay the subscription evaluation
var wdChannel = postal.channel("He.Will.Knock.Four.Times"),
wdSubscription = wdChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo($("#example9"));
}).withDelay(5000);
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
wdSubscription.unsubscribe();
});

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define(['postal', 'underscore'], function(postal, _) {
postal.addWireTap(function(data, envelope) {
var all = _.extend(envelope, { data: data });
if(!JSON) {
throw "This browser or environment does not provide JSON support";
}
try {
console.log(JSON.stringify(all));
}
catch(exception) {
try {
all.data = "ERROR: " + exception.message;
console.log(JSON.stringify(all));
}
catch(ex) {
console.log("Unable to parse data to JSON: " + exception);
}
}
});
});

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define(['underscore'], function(_) {
/*
postal.js
Author: Jim Cowart
License: Dual licensed MIT (http://www.opensource.org/licenses/mit-license) & GPL (http://www.opensource.org/licenses/gpl-license)
Version 0.4.0
*/
var DEFAULT_EXCHANGE = "/",
DEFAULT_PRIORITY = 50,
DEFAULT_DISPOSEAFTER = 0,
NO_OP = function() { },
parsePublishArgs = function(args) {
var parsed = { envelope: { } }, env;
switch(args.length) {
case 3:
if(typeof args[1] === "Object" && typeof args[2] === "Object") {
parsed.envelope.exchange = DEFAULT_EXCHANGE;
parsed.envelope.topic = args[0];
parsed.payload = args[1];
env = parsed.envelope;
parsed.envelope = _.extend(env, args[2]);
}
else {
parsed.envelope.exchange = args[0];
parsed.envelope.topic = args[1];
parsed.payload = args[2];
}
break;
case 4:
parsed.envelope.exchange = args[0];
parsed.envelope.topic = args[1];
parsed.payload = args[2];
env = parsed.envelope;
parsed.envelope = _.extend(env, args[3]);
break;
default:
parsed.envelope.exchange = DEFAULT_EXCHANGE;
parsed.envelope.topic = args[0];
parsed.payload = args[1];
break;
}
return parsed;
};
var DistinctPredicate = function() {
var previous;
return function(data) {
var eq = false;
if(_.isString(data)) {
eq = data === previous;
previous = data;
}
else {
eq = _.isEqual(data, previous);
previous = _.clone(data);
}
return !eq;
};
};
var ChannelDefinition = function(exchange, topic) {
this.exchange = exchange;
this.topic = topic;
};
ChannelDefinition.prototype = {
subscribe: function(callback) {
var subscription = new SubscriptionDefinition(this.exchange, this.topic, callback);
postal.configuration.bus.subscribe(subscription);
return subscription;
},
publish: function(data, envelope) {
var env = _.extend({
exchange: this.exchange,
timeStamp: new Date(),
topic: this.topic
}, envelope);
postal.configuration.bus.publish(data, env);
}
};
var SubscriptionDefinition = function(exchange, topic, callback) {
this.exchange = exchange;
this.topic = topic;
this.callback = callback;
this.priority = DEFAULT_PRIORITY;
this.constraints = [];
this.maxCalls = DEFAULT_DISPOSEAFTER;
this.onHandled = NO_OP;
this.context = null;
};
SubscriptionDefinition.prototype = {
unsubscribe: function() {
postal.configuration.bus.unsubscribe(this);
},
defer: function() {
var fn = this.callback;
this.callback = function(data) {
setTimeout(fn,0,data);
};
return this;
},
disposeAfter: function(maxCalls) {
if(_.isNaN(maxCalls) || maxCalls <= 0) {
throw "The value provided to disposeAfter (maxCalls) must be a number greater than zero.";
}
var fn = this.onHandled;
var dispose = _.after(maxCalls, _.bind(function() {
this.unsubscribe(this);
}, this));
this.onHandled = function() {
fn.apply(this.context, arguments);
dispose();
};
return this;
},
ignoreDuplicates: function() {
this.withConstraint(new DistinctPredicate());
return this;
},
whenHandledThenExecute: function(callback) {
if(! _.isFunction(callback)) {
throw "Value provided to 'whenHandledThenExecute' must be a function";
}
this.onHandled = callback;
return this;
},
withConstraint: function(predicate) {
if(! _.isFunction(predicate)) {
throw "Predicate constraint must be a function";
}
this.constraints.push(predicate);
return this;
},
withConstraints: function(predicates) {
var self = this;
if(_.isArray(predicates)) {
_.each(predicates, function(predicate) { self.withConstraint(predicate); } );
}
return self;
},
withContext: function(context) {
this.context = context;
return this;
},
withDebounce: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = _.debounce(fn, milliseconds);
return this;
},
withDelay: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = function(data) {
setTimeout(fn, milliseconds, data);
};
return this;
},
withPriority: function(priority) {
if(_.isNaN(priority)) {
throw "Priority must be a number";
}
this.priority = priority;
return this;
},
withThrottle: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = _.throttle(fn, milliseconds);
return this;
}
};
var bindingsResolver = {
cache: { },
compare: function(binding, topic) {
if(this.cache[topic] && this.cache[topic][binding]) {
return true;
}
var rgx = new RegExp("^" + this.regexify(binding) + "$"), // match from start to end of string
result = rgx.test(topic);
if(result) {
if(!this.cache[topic]) {
this.cache[topic] = {};
}
this.cache[topic][binding] = true;
}
return result;
},
regexify: function(binding) {
return binding.replace(/\./g,"\\.") // escape actual periods
.replace(/\*/g, ".*") // asterisks match any value
.replace(/#/g, "[A-Z,a-z,0-9]*"); // hash matches any alpha-numeric 'word'
}
};
var localBus = {
subscriptions: {},
wireTaps: [],
publish: function(data, envelope) {
_.each(this.wireTaps,function(tap) {
tap(data, envelope);
});
_.each(this.subscriptions[envelope.exchange], function(topic) {
_.each(topic, function(binding){
if(postal.configuration.resolver.compare(binding.topic, envelope.topic)) {
if(_.all(binding.constraints, function(constraint) { return constraint(data); })) {
if(typeof binding.callback === 'function') {
binding.callback.apply(binding.context, [data, envelope]);
binding.onHandled();
}
}
}
});
});
},
subscribe: function(subDef) {
var idx, found, fn;
if(!this.subscriptions[subDef.exchange]) {
this.subscriptions[subDef.exchange] = {};
}
if(!this.subscriptions[subDef.exchange][subDef.topic]) {
this.subscriptions[subDef.exchange][subDef.topic] = [];
}
idx = this.subscriptions[subDef.exchange][subDef.topic].length - 1;
if(!_.any(this.subscriptions[subDef.exchange][subDef.topic], function(cfg) { return cfg === subDef; })) {
for(; idx >= 0; idx--) {
if(this.subscriptions[subDef.exchange][subDef.topic][idx].priority <= subDef.priority) {
this.subscriptions[subDef.exchange][subDef.topic].splice(idx + 1, 0, subDef);
found = true;
break;
}
}
if(!found) {
this.subscriptions[subDef.exchange][subDef.topic].unshift(subDef);
}
}
return _.bind(function() { this.unsubscribe(subDef); }, this);
},
unsubscribe: function(config) {
if(this.subscriptions[config.exchange][config.topic]) {
var len = this.subscriptions[config.exchange][config.topic].length,
idx = 0;
for ( ; idx < len; idx++ ) {
if (this.subscriptions[config.exchange][config.topic][idx] === config) {
this.subscriptions[config.exchange][config.topic].splice( idx, 1 );
break;
}
}
}
},
addWireTap: function(callback) {
this.wireTaps.push(callback);
return function() {
var idx = this.wireTaps.indexOf(callback);
if(idx !== -1) {
this.wireTaps.splice(idx,1);
}
};
}
};
var postal = {
configuration: {
bus: localBus,
resolver: bindingsResolver
},
channel: function(exchange, topic) {
var exch = arguments.length === 2 ? exchange : DEFAULT_EXCHANGE,
tpc = arguments.length === 2 ? topic : exchange;
return new ChannelDefinition(exch, tpc);
},
subscribe: function(exchange, topic, callback) {
var exch = arguments.length === 3 ? exchange : DEFAULT_EXCHANGE,
tpc = arguments.length === 3 ? topic : exchange,
callbk = arguments.length === 3 ? callback : topic;
var channel = this.channel(exch, tpc);
return channel.subscribe(callbk);
},
publish: function(exchange, topic, payload, envelopeOptions) {
var parsedArgs = parsePublishArgs([].slice.call(arguments,0));
var channel = this.channel(parsedArgs.envelope.exchange, parsedArgs.envelope.topic);
channel.publish(parsedArgs.payload, parsedArgs.envelope);
},
addWireTap: function(callback) {
this.configuration.bus.addWireTap(callback);
}
};
return postal; });

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/*
RequireJS 1.0.2 Copyright (c) 2010-2011, The Dojo Foundation All Rights Reserved.
Available via the MIT or new BSD license.
see: http://github.com/jrburke/requirejs for details
*/
var requirejs,require,define;
(function(){function J(a){return M.call(a)==="[object Function]"}function E(a){return M.call(a)==="[object Array]"}function Z(a,c,h){for(var k in c)if(!(k in K)&&(!(k in a)||h))a[k]=c[k];return d}function N(a,c,d){a=Error(c+"\nhttp://requirejs.org/docs/errors.html#"+a);if(d)a.originalError=d;return a}function $(a,c,d){var k,j,q;for(k=0;q=c[k];k++){q=typeof q==="string"?{name:q}:q;j=q.location;if(d&&(!j||j.indexOf("/")!==0&&j.indexOf(":")===-1))j=d+"/"+(j||q.name);a[q.name]={name:q.name,location:j||
q.name,main:(q.main||"main").replace(ea,"").replace(aa,"")}}}function V(a,c){a.holdReady?a.holdReady(c):c?a.readyWait+=1:a.ready(!0)}function fa(a){function c(b,l){var f,a;if(b&&b.charAt(0)===".")if(l){p.pkgs[l]?l=[l]:(l=l.split("/"),l=l.slice(0,l.length-1));f=b=l.concat(b.split("/"));var c;for(a=0;c=f[a];a++)if(c===".")f.splice(a,1),a-=1;else if(c==="..")if(a===1&&(f[2]===".."||f[0]===".."))break;else a>0&&(f.splice(a-1,2),a-=2);a=p.pkgs[f=b[0]];b=b.join("/");a&&b===f+"/"+a.main&&(b=f)}else b.indexOf("./")===
0&&(b=b.substring(2));return b}function h(b,l){var f=b?b.indexOf("!"):-1,a=null,d=l?l.name:null,i=b,e,h;f!==-1&&(a=b.substring(0,f),b=b.substring(f+1,b.length));a&&(a=c(a,d));b&&(a?e=(f=m[a])&&f.normalize?f.normalize(b,function(b){return c(b,d)}):c(b,d):(e=c(b,d),h=E[e],h||(h=g.nameToUrl(e,null,l),E[e]=h)));return{prefix:a,name:e,parentMap:l,url:h,originalName:i,fullName:a?a+"!"+(e||""):e}}function k(){var b=!0,l=p.priorityWait,f,a;if(l){for(a=0;f=l[a];a++)if(!s[f]){b=!1;break}b&&delete p.priorityWait}return b}
function j(b,l,f){return function(){var a=ga.call(arguments,0),c;if(f&&J(c=a[a.length-1]))c.__requireJsBuild=!0;a.push(l);return b.apply(null,a)}}function q(b,l){var a=j(g.require,b,l);Z(a,{nameToUrl:j(g.nameToUrl,b),toUrl:j(g.toUrl,b),defined:j(g.requireDefined,b),specified:j(g.requireSpecified,b),isBrowser:d.isBrowser});return a}function o(b){var l,a,c,C=b.callback,i=b.map,e=i.fullName,ba=b.deps;c=b.listeners;if(C&&J(C)){if(p.catchError.define)try{a=d.execCb(e,b.callback,ba,m[e])}catch(k){l=k}else a=
d.execCb(e,b.callback,ba,m[e]);if(e)(C=b.cjsModule)&&C.exports!==void 0&&C.exports!==m[e]?a=m[e]=b.cjsModule.exports:a===void 0&&b.usingExports?a=m[e]:(m[e]=a,F[e]&&(Q[e]=!0))}else e&&(a=m[e]=C,F[e]&&(Q[e]=!0));if(D[b.id])delete D[b.id],b.isDone=!0,g.waitCount-=1,g.waitCount===0&&(I=[]);delete R[e];if(d.onResourceLoad&&!b.placeholder)d.onResourceLoad(g,i,b.depArray);if(l)return a=(e?h(e).url:"")||l.fileName||l.sourceURL,c=l.moduleTree,l=N("defineerror",'Error evaluating module "'+e+'" at location "'+
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Object(a))throw new TypeError("Invalid object");var b=[],d;for(d in a)m.call(a,d)&&(b[b.length]=d);return b};b.values=function(a){return b.map(a,b.identity)};b.functions=b.methods=function(a){var c=[],d;for(d in a)b.isFunction(a[d])&&c.push(d);return c.sort()};b.extend=function(a){j(i.call(arguments,1),function(b){for(var d in b)b[d]!==void 0&&(a[d]=b[d])});return a};b.defaults=function(a){j(i.call(arguments,1),function(b){for(var d in b)a[d]==null&&(a[d]=b[d])});return a};b.clone=function(a){return!b.isObject(a)?
a:b.isArray(a)?a.slice():b.extend({},a)};b.tap=function(a,b){b(a);return a};b.isEqual=function(a,b){return r(a,b,[])};b.isEmpty=function(a){if(b.isArray(a)||b.isString(a))return a.length===0;for(var c in a)if(m.call(a,c))return false;return true};b.isElement=function(a){return!!(a&&a.nodeType==1)};b.isArray=p||function(a){return l.call(a)=="[object Array]"};b.isObject=function(a){return a===Object(a)};b.isArguments=l.call(arguments)=="[object Arguments]"?function(a){return l.call(a)=="[object Arguments]"}:
function(a){return!(!a||!m.call(a,"callee"))};b.isFunction=function(a){return l.call(a)=="[object Function]"};b.isString=function(a){return l.call(a)=="[object String]"};b.isNumber=function(a){return l.call(a)=="[object Number]"};b.isNaN=function(a){return a!==a};b.isBoolean=function(a){return a===true||a===false||l.call(a)=="[object Boolean]"};b.isDate=function(a){return l.call(a)=="[object Date]"};b.isRegExp=function(a){return l.call(a)=="[object RegExp]"};b.isNull=function(a){return a===null};
b.isUndefined=function(a){return a===void 0};b.noConflict=function(){s._=F;return this};b.identity=function(a){return a};b.times=function(a,b,d){for(var e=0;e<a;e++)b.call(d,e)};b.escape=function(a){return(""+a).replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/"/g,"&quot;").replace(/'/g,"&#x27;").replace(/\//g,"&#x2F;")};b.mixin=function(a){j(b.functions(a),function(c){I(c,b[c]=a[c])})};var J=0;b.uniqueId=function(a){var b=J++;return a?a+b:b};b.templateSettings={evaluate:/<%([\s\S]+?)%>/g,
interpolate:/<%=([\s\S]+?)%>/g,escape:/<%-([\s\S]+?)%>/g};b.template=function(a,c){var d=b.templateSettings,d="var __p=[],print=function(){__p.push.apply(__p,arguments);};with(obj||{}){__p.push('"+a.replace(/\\/g,"\\\\").replace(/'/g,"\\'").replace(d.escape,function(a,b){return"',_.escape("+b.replace(/\\'/g,"'")+"),'"}).replace(d.interpolate,function(a,b){return"',"+b.replace(/\\'/g,"'")+",'"}).replace(d.evaluate||null,function(a,b){return"');"+b.replace(/\\'/g,"'").replace(/[\r\n\t]/g," ")+";__p.push('"}).replace(/\r/g,
"\\r").replace(/\n/g,"\\n").replace(/\t/g,"\\t")+"');}return __p.join('');",e=new Function("obj","_",d);return c?e(c,b):function(a){return e(a,b)}};var n=function(a){this._wrapped=a};b.prototype=n.prototype;var u=function(a,c){return c?b(a).chain():a},I=function(a,c){n.prototype[a]=function(){var a=i.call(arguments);G.call(a,this._wrapped);return u(c.apply(b,a),this._chain)}};b.mixin(b);j("pop,push,reverse,shift,sort,splice,unshift".split(","),function(a){var b=k[a];n.prototype[a]=function(){b.apply(this._wrapped,
arguments);return u(this._wrapped,this._chain)}});j(["concat","join","slice"],function(a){var b=k[a];n.prototype[a]=function(){return u(b.apply(this._wrapped,arguments),this._chain)}});n.prototype.chain=function(){this._chain=true;return this};n.prototype.value=function(){return this._wrapped}}).call(this);

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require.config({
paths: {
underscore: 'libs/underscore/underscore-min',
postal: 'libs/postal/postal',
postaldiags:'libs/postal/postal.diagnostics',
jquery: 'libs/jquery/jquery-min'
}
});
require(['jquery'], function($){
$(function(){
require(['examples']);
});
});

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div {
font-family: Tahoma, Arial;
font-size: 10pt;
}
.results {
margin-bottom:20px;
padding: 10px;
border-top: 1pt solid lightsteelblue;
border-bottom: 1pt solid lightsteelblue;
}

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Postal Examples (Standard Lib Format)</title>
<link rel="stylesheet" type="text/css" href="style.css">
<script type="text/javascript" src="js/underscore.js"></script>
<script type="text/javascript" src="js/jquery-1.7.1.js"></script>
<script type="text/javascript" src="js/postal.js"></script>
<script type="text/javascript" src="js/postal.diagnostics.js"></script>
<script type="text/javascript" src="js/main.js"></script>
</head>
<body>
<div>
Example 1 - The World's Simplest Subscription
<div class="results" id="example1"></div>
</div>
<div>
Example 2 - Subscribing with the "#" wildcard character
<ul class="results" id="example2"></ul>
</div>
<div>
Example 3 - Subscribing with the "*" wildcard character
<ul class="results" id="example3"></ul>
</div>
<div>
Example 4 - using ignoreDuplicates()
<ul class="results" id="example4"></ul>
</div>
<div>
Example 5 - using disposeAfter(X)
<ul class="results" id="example5"></ul>
</div>
<div>
Example 6 - using whenHandledThenExecute(X)
<ul class="results" id="example6"></ul>
</div>
<div>
Example 7 - using withConstraint() to apply a predicate to subscription callback
<ul class="results" id="example7"></ul>
</div>
<div>
Example 8 - using withContext to set the "this" context
<ul class="results" id="example8"></ul>
</div>
<div>
Example 9 - using withDelay to delay evaluation of subscription
<ul class="results" id="example9"></ul>
</div>
</body>
</html>

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$(function(){
// The world's simplest subscription
var channel = postal.channel("Name.Changed");
// subscribe
var subscription = channel.subscribe(function(data) { $("#example1").html("Name: " + data.name); });
// And someone publishes a first name change:
channel.publish({ name: "Dr. Who" });
subscription.unsubscribe();
// Subscribing to a wildcard topic using #
// The # symbol represents "one word" in a topic (i.e - the text between two periods of a topic).
// By subscribing to "#.Changed", the binding will match
// Name.Changed & Location.Changed but *not* for Changed.Companion
var hashChannel = postal.channel("#.Changed"),
chgSubscription = hashChannel.subscribe(function(data) {
$('<li>' + data.type + " Changed: " + data.value + '</li>').appendTo("#example2");
});
postal.channel("Name.Changed")
.publish({ type: "Name", value:"John Smith" });
postal.channel("Location.Changed")
.publish({ type: "Location", value: "Early 20th Century England" });
chgSubscription.unsubscribe();
// Subscribing to a wildcard topic using *
// The * symbol represents any number of characters/words in a topic string.
// By subscribing to "DrWho.*.Changed", the binding will match
// DrWho.NinthDoctor.Companion.Changed & DrWho.Location.Changed but *not* Changed
var starChannel = postal.channel("DrWho.*.Changed"),
starSubscription = starChannel.subscribe(function(data) {
$('<li>' + data.type + " Changed: " + data.value + '</li>').appendTo("#example3");
});
postal.channel("DrWho.NinthDoctor.Companion.Changed")
.publish({ type: "Companion Name", value:"Rose" });
postal.channel("DrWho.TenthDoctor.Companion.Changed")
.publish({ type: "Companion Name", value:"Martha" });
postal.channel("DrWho.Eleventh.Companion.Changed")
.publish({ type: "Companion Name", value:"Amy" });
postal.channel("DrWho.Location.Changed")
.publish({ type: "Location", value: "The Library" });
postal.channel("TheMaster.DrumBeat.Changed")
.publish({ type: "DrumBeat", value: "This won't trigger any subscriptions" });
postal.channel("Changed")
.publish({ type: "Useless", value: "This won't trigger any subscriptions either" });
starSubscription.unsubscribe();
// Applying ignoreDuplicates to a subscription
var dupChannel = postal.channel("WeepingAngel.*"),
dupSubscription = dupChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example4");
}).ignoreDuplicates();
postal.channel("WeepingAngel.DontBlink")
.publish({ value:"Don't Blink" });
postal.channel("WeepingAngel.DontBlink")
.publish({ value:"Don't Blink" });
postal.channel("WeepingAngel.DontEvenBlink")
.publish({ value:"Don't Even Blink" });
postal.channel("WeepingAngel.DontBlink")
.publish({ value:"Don't Close Your Eyes" });
dupSubscription.unsubscribe();
// Using disposeAfter(X) to remove subscription automagically after X number of receives
var daChannel = postal.channel("Donna.Noble.*"),
daSubscription = daChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example5");
}).disposeAfter(2);
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
postal.channel("Donna.Noble.ScreamingAgain")
.publish({ value:"Donna Noble has left the library." });
daSubscription.unsubscribe();
// Using whenHandledThenExecute() to invoke a function after handling a message
var whteChannel = postal.channel("Donna.Noble.*"),
whteSubscription = whteChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example6");
}).whenHandledThenExecute(function() {
$('<li>[Kind of a frivolous example...but this line resulted from the whenHandledThenExecute() callback]</li>').appendTo("#example6");
});
postal.channel("Donna.Noble.*")
.publish({ value:"Donna Noble has left the library." });
whteSubscription.unsubscribe();
// Using withConstraint to apply a predicate to the subscription
var drIsInTheTardis = false,
wcChannel = postal.channel("Tardis.Depart"),
wcSubscription = wcChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo("#example7");
}).withConstraint(function() { return drIsInTheTardis; } );
postal.channel("Tardis.Depart")
.publish({ value:"Time for time travel....fantastic!" });
postal.channel("Tardis.Depart")
.publish({ value:"Time for time travel....fantastic!" });
drIsInTheTardis = true;
postal.channel("Tardis.Depart")
.publish({ value:"Time for time travel....fantastic!" });
wcSubscription.unsubscribe();
// Using withContext to set the "this" context
var ctxChannel = postal.channel("Dalek.Meet.CyberMen"),
ctxSubscription = ctxChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo(this);
}).withContext($("#example8"));
postal.channel("Dalek.Meet.CyberMen")
.publish({ value:"Exterminate!" });
postal.channel("Dalek.Meet.CyberMen")
.publish({ value:"Delete!" });
ctxSubscription.unsubscribe();
// Using withDelay() to delay the subscription evaluation
var wdChannel = postal.channel("He.Will.Knock.Four.Times"),
wdSubscription = wdChannel.subscribe(function(data) {
$('<li>' + data.value + '</li>').appendTo($("#example9"));
}).withDelay(5000);
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
postal.channel("He.Will.Knock.Four.Times")
.publish({ value:"Knock!" });
wdSubscription.unsubscribe();
});

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// Underscore.js 1.1.7
// (c) 2011 Jeremy Ashkenas, DocumentCloud Inc.
// Underscore is freely distributable under the MIT license.
// Portions of Underscore are inspired or borrowed from Prototype,
// Oliver Steele's Functional, and John Resig's Micro-Templating.
// For all details and documentation:
// http://documentcloud.github.com/underscore
(function() {
// Baseline setup
// --------------
// Establish the root object, `window` in the browser, or `global` on the server.
var root = this;
// Save the previous value of the `_` variable.
var previousUnderscore = root._;
// Establish the object that gets returned to break out of a loop iteration.
var breaker = {};
// Save bytes in the minified (but not gzipped) version:
var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
// Create quick reference variables for speed access to core prototypes.
var slice = ArrayProto.slice,
unshift = ArrayProto.unshift,
toString = ObjProto.toString,
hasOwnProperty = ObjProto.hasOwnProperty;
// All **ECMAScript 5** native function implementations that we hope to use
// are declared here.
var
nativeForEach = ArrayProto.forEach,
nativeMap = ArrayProto.map,
nativeReduce = ArrayProto.reduce,
nativeReduceRight = ArrayProto.reduceRight,
nativeFilter = ArrayProto.filter,
nativeEvery = ArrayProto.every,
nativeSome = ArrayProto.some,
nativeIndexOf = ArrayProto.indexOf,
nativeLastIndexOf = ArrayProto.lastIndexOf,
nativeIsArray = Array.isArray,
nativeKeys = Object.keys,
nativeBind = FuncProto.bind;
// Create a safe reference to the Underscore object for use below.
var _ = function(obj) { return new wrapper(obj); };
// Export the Underscore object for **CommonJS**, with backwards-compatibility
// for the old `require()` API. If we're not in CommonJS, add `_` to the
// global object.
if (typeof module !== 'undefined' && module.exports) {
module.exports = _;
_._ = _;
} else {
// Exported as a string, for Closure Compiler "advanced" mode.
root['_'] = _;
}
// Current version.
_.VERSION = '1.1.7';
// Collection Functions
// --------------------
// The cornerstone, an `each` implementation, aka `forEach`.
// Handles objects with the built-in `forEach`, arrays, and raw objects.
// Delegates to **ECMAScript 5**'s native `forEach` if available.
var each = _.each = _.forEach = function(obj, iterator, context) {
if (obj == null) return;
if (nativeForEach && obj.forEach === nativeForEach) {
obj.forEach(iterator, context);
} else if (obj.length === +obj.length) {
for (var i = 0, l = obj.length; i < l; i++) {
if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return;
}
} else {
for (var key in obj) {
if (hasOwnProperty.call(obj, key)) {
if (iterator.call(context, obj[key], key, obj) === breaker) return;
}
}
}
};
// Return the results of applying the iterator to each element.
// Delegates to **ECMAScript 5**'s native `map` if available.
_.map = function(obj, iterator, context) {
var results = [];
if (obj == null) return results;
if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
each(obj, function(value, index, list) {
results[results.length] = iterator.call(context, value, index, list);
});
return results;
};
// **Reduce** builds up a single result from a list of values, aka `inject`,
// or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
_.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
var initial = memo !== void 0;
if (obj == null) obj = [];
if (nativeReduce && obj.reduce === nativeReduce) {
if (context) iterator = _.bind(iterator, context);
return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
}
each(obj, function(value, index, list) {
if (!initial) {
memo = value;
initial = true;
} else {
memo = iterator.call(context, memo, value, index, list);
}
});
if (!initial) throw new TypeError("Reduce of empty array with no initial value");
return memo;
};
// The right-associative version of reduce, also known as `foldr`.
// Delegates to **ECMAScript 5**'s native `reduceRight` if available.
_.reduceRight = _.foldr = function(obj, iterator, memo, context) {
if (obj == null) obj = [];
if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
if (context) iterator = _.bind(iterator, context);
return memo !== void 0 ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
}
var reversed = (_.isArray(obj) ? obj.slice() : _.toArray(obj)).reverse();
return _.reduce(reversed, iterator, memo, context);
};
// Return the first value which passes a truth test. Aliased as `detect`.
_.find = _.detect = function(obj, iterator, context) {
var result;
any(obj, function(value, index, list) {
if (iterator.call(context, value, index, list)) {
result = value;
return true;
}
});
return result;
};
// Return all the elements that pass a truth test.
// Delegates to **ECMAScript 5**'s native `filter` if available.
// Aliased as `select`.
_.filter = _.select = function(obj, iterator, context) {
var results = [];
if (obj == null) return results;
if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
each(obj, function(value, index, list) {
if (iterator.call(context, value, index, list)) results[results.length] = value;
});
return results;
};
// Return all the elements for which a truth test fails.
_.reject = function(obj, iterator, context) {
var results = [];
if (obj == null) return results;
each(obj, function(value, index, list) {
if (!iterator.call(context, value, index, list)) results[results.length] = value;
});
return results;
};
// Determine whether all of the elements match a truth test.
// Delegates to **ECMAScript 5**'s native `every` if available.
// Aliased as `all`.
_.every = _.all = function(obj, iterator, context) {
var result = true;
if (obj == null) return result;
if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
each(obj, function(value, index, list) {
if (!(result = result && iterator.call(context, value, index, list))) return breaker;
});
return result;
};
// Determine if at least one element in the object matches a truth test.
// Delegates to **ECMAScript 5**'s native `some` if available.
// Aliased as `any`.
var any = _.some = _.any = function(obj, iterator, context) {
iterator = iterator || _.identity;
var result = false;
if (obj == null) return result;
if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
each(obj, function(value, index, list) {
if (result |= iterator.call(context, value, index, list)) return breaker;
});
return !!result;
};
// Determine if a given value is included in the array or object using `===`.
// Aliased as `contains`.
_.include = _.contains = function(obj, target) {
var found = false;
if (obj == null) return found;
if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
any(obj, function(value) {
if (found = value === target) return true;
});
return found;
};
// Invoke a method (with arguments) on every item in a collection.
_.invoke = function(obj, method) {
var args = slice.call(arguments, 2);
return _.map(obj, function(value) {
return (method.call ? method || value : value[method]).apply(value, args);
});
};
// Convenience version of a common use case of `map`: fetching a property.
_.pluck = function(obj, key) {
return _.map(obj, function(value){ return value[key]; });
};
// Return the maximum element or (element-based computation).
_.max = function(obj, iterator, context) {
if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
var result = {computed : -Infinity};
each(obj, function(value, index, list) {
var computed = iterator ? iterator.call(context, value, index, list) : value;
computed >= result.computed && (result = {value : value, computed : computed});
});
return result.value;
};
// Return the minimum element (or element-based computation).
_.min = function(obj, iterator, context) {
if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj);
var result = {computed : Infinity};
each(obj, function(value, index, list) {
var computed = iterator ? iterator.call(context, value, index, list) : value;
computed < result.computed && (result = {value : value, computed : computed});
});
return result.value;
};
// Sort the object's values by a criterion produced by an iterator.
_.sortBy = function(obj, iterator, context) {
return _.pluck(_.map(obj, function(value, index, list) {
return {
value : value,
criteria : iterator.call(context, value, index, list)
};
}).sort(function(left, right) {
var a = left.criteria, b = right.criteria;
return a < b ? -1 : a > b ? 1 : 0;
}), 'value');
};
// Groups the object's values by a criterion produced by an iterator
_.groupBy = function(obj, iterator) {
var result = {};
each(obj, function(value, index) {
var key = iterator(value, index);
(result[key] || (result[key] = [])).push(value);
});
return result;
};
// Use a comparator function to figure out at what index an object should
// be inserted so as to maintain order. Uses binary search.
_.sortedIndex = function(array, obj, iterator) {
iterator || (iterator = _.identity);
var low = 0, high = array.length;
while (low < high) {
var mid = (low + high) >> 1;
iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid;
}
return low;
};
// Safely convert anything iterable into a real, live array.
_.toArray = function(iterable) {
if (!iterable) return [];
if (iterable.toArray) return iterable.toArray();
if (_.isArray(iterable)) return slice.call(iterable);
if (_.isArguments(iterable)) return slice.call(iterable);
return _.values(iterable);
};
// Return the number of elements in an object.
_.size = function(obj) {
return _.toArray(obj).length;
};
// Array Functions
// ---------------
// Get the first element of an array. Passing **n** will return the first N
// values in the array. Aliased as `head`. The **guard** check allows it to work
// with `_.map`.
_.first = _.head = function(array, n, guard) {
return (n != null) && !guard ? slice.call(array, 0, n) : array[0];
};
// Returns everything but the first entry of the array. Aliased as `tail`.
// Especially useful on the arguments object. Passing an **index** will return
// the rest of the values in the array from that index onward. The **guard**
// check allows it to work with `_.map`.
_.rest = _.tail = function(array, index, guard) {
return slice.call(array, (index == null) || guard ? 1 : index);
};
// Get the last element of an array.
_.last = function(array) {
return array[array.length - 1];
};
// Trim out all falsy values from an array.
_.compact = function(array) {
return _.filter(array, function(value){ return !!value; });
};
// Return a completely flattened version of an array.
_.flatten = function(array) {
return _.reduce(array, function(memo, value) {
if (_.isArray(value)) return memo.concat(_.flatten(value));
memo[memo.length] = value;
return memo;
}, []);
};
// Return a version of the array that does not contain the specified value(s).
_.without = function(array) {
return _.difference(array, slice.call(arguments, 1));
};
// Produce a duplicate-free version of the array. If the array has already
// been sorted, you have the option of using a faster algorithm.
// Aliased as `unique`.
_.uniq = _.unique = function(array, isSorted) {
return _.reduce(array, function(memo, el, i) {
if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) memo[memo.length] = el;
return memo;
}, []);
};
// Produce an array that contains the union: each distinct element from all of
// the passed-in arrays.
_.union = function() {
return _.uniq(_.flatten(arguments));
};
// Produce an array that contains every item shared between all the
// passed-in arrays. (Aliased as "intersect" for back-compat.)
_.intersection = _.intersect = function(array) {
var rest = slice.call(arguments, 1);
return _.filter(_.uniq(array), function(item) {
return _.every(rest, function(other) {
return _.indexOf(other, item) >= 0;
});
});
};
// Take the difference between one array and another.
// Only the elements present in just the first array will remain.
_.difference = function(array, other) {
return _.filter(array, function(value){ return !_.include(other, value); });
};
// Zip together multiple lists into a single array -- elements that share
// an index go together.
_.zip = function() {
var args = slice.call(arguments);
var length = _.max(_.pluck(args, 'length'));
var results = new Array(length);
for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i);
return results;
};
// If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
// we need this function. Return the position of the first occurrence of an
// item in an array, or -1 if the item is not included in the array.
// Delegates to **ECMAScript 5**'s native `indexOf` if available.
// If the array is large and already in sort order, pass `true`
// for **isSorted** to use binary search.
_.indexOf = function(array, item, isSorted) {
if (array == null) return -1;
var i, l;
if (isSorted) {
i = _.sortedIndex(array, item);
return array[i] === item ? i : -1;
}
if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
for (i = 0, l = array.length; i < l; i++) if (array[i] === item) return i;
return -1;
};
// Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
_.lastIndexOf = function(array, item) {
if (array == null) return -1;
if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
var i = array.length;
while (i--) if (array[i] === item) return i;
return -1;
};
// Generate an integer Array containing an arithmetic progression. A port of
// the native Python `range()` function. See
// [the Python documentation](http://docs.python.org/library/functions.html#range).
_.range = function(start, stop, step) {
if (arguments.length <= 1) {
stop = start || 0;
start = 0;
}
step = arguments[2] || 1;
var len = Math.max(Math.ceil((stop - start) / step), 0);
var idx = 0;
var range = new Array(len);
while(idx < len) {
range[idx++] = start;
start += step;
}
return range;
};
// Function (ahem) Functions
// ------------------
// Create a function bound to a given object (assigning `this`, and arguments,
// optionally). Binding with arguments is also known as `curry`.
// Delegates to **ECMAScript 5**'s native `Function.bind` if available.
// We check for `func.bind` first, to fail fast when `func` is undefined.
_.bind = function(func, obj) {
if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
var args = slice.call(arguments, 2);
return function() {
return func.apply(obj, args.concat(slice.call(arguments)));
};
};
// Bind all of an object's methods to that object. Useful for ensuring that
// all callbacks defined on an object belong to it.
_.bindAll = function(obj) {
var funcs = slice.call(arguments, 1);
if (funcs.length == 0) funcs = _.functions(obj);
each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
return obj;
};
// Memoize an expensive function by storing its results.
_.memoize = function(func, hasher) {
var memo = {};
hasher || (hasher = _.identity);
return function() {
var key = hasher.apply(this, arguments);
return hasOwnProperty.call(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
};
};
// Delays a function for the given number of milliseconds, and then calls
// it with the arguments supplied.
_.delay = function(func, wait) {
var args = slice.call(arguments, 2);
return setTimeout(function(){ return func.apply(func, args); }, wait);
};
// Defers a function, scheduling it to run after the current call stack has
// cleared.
_.defer = function(func) {
return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
};
// Internal function used to implement `_.throttle` and `_.debounce`.
var limit = function(func, wait, debounce) {
var timeout;
return function() {
var context = this, args = arguments;
var throttler = function() {
timeout = null;
func.apply(context, args);
};
if (debounce) clearTimeout(timeout);
if (debounce || !timeout) timeout = setTimeout(throttler, wait);
};
};
// Returns a function, that, when invoked, will only be triggered at most once
// during a given window of time.
_.throttle = function(func, wait) {
return limit(func, wait, false);
};
// Returns a function, that, as long as it continues to be invoked, will not
// be triggered. The function will be called after it stops being called for
// N milliseconds.
_.debounce = function(func, wait) {
return limit(func, wait, true);
};
// Returns a function that will be executed at most one time, no matter how
// often you call it. Useful for lazy initialization.
_.once = function(func) {
var ran = false, memo;
return function() {
if (ran) return memo;
ran = true;
return memo = func.apply(this, arguments);
};
};
// Returns the first function passed as an argument to the second,
// allowing you to adjust arguments, run code before and after, and
// conditionally execute the original function.
_.wrap = function(func, wrapper) {
return function() {
var args = [func].concat(slice.call(arguments));
return wrapper.apply(this, args);
};
};
// Returns a function that is the composition of a list of functions, each
// consuming the return value of the function that follows.
_.compose = function() {
var funcs = slice.call(arguments);
return function() {
var args = slice.call(arguments);
for (var i = funcs.length - 1; i >= 0; i--) {
args = [funcs[i].apply(this, args)];
}
return args[0];
};
};
// Returns a function that will only be executed after being called N times.
_.after = function(times, func) {
return function() {
if (--times < 1) { return func.apply(this, arguments); }
};
};
// Object Functions
// ----------------
// Retrieve the names of an object's properties.
// Delegates to **ECMAScript 5**'s native `Object.keys`
_.keys = nativeKeys || function(obj) {
if (obj !== Object(obj)) throw new TypeError('Invalid object');
var keys = [];
for (var key in obj) if (hasOwnProperty.call(obj, key)) keys[keys.length] = key;
return keys;
};
// Retrieve the values of an object's properties.
_.values = function(obj) {
return _.map(obj, _.identity);
};
// Return a sorted list of the function names available on the object.
// Aliased as `methods`
_.functions = _.methods = function(obj) {
var names = [];
for (var key in obj) {
if (_.isFunction(obj[key])) names.push(key);
}
return names.sort();
};
// Extend a given object with all the properties in passed-in object(s).
_.extend = function(obj) {
each(slice.call(arguments, 1), function(source) {
for (var prop in source) {
if (source[prop] !== void 0) obj[prop] = source[prop];
}
});
return obj;
};
// Fill in a given object with default properties.
_.defaults = function(obj) {
each(slice.call(arguments, 1), function(source) {
for (var prop in source) {
if (obj[prop] == null) obj[prop] = source[prop];
}
});
return obj;
};
// Create a (shallow-cloned) duplicate of an object.
_.clone = function(obj) {
return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
};
// Invokes interceptor with the obj, and then returns obj.
// The primary purpose of this method is to "tap into" a method chain, in
// order to perform operations on intermediate results within the chain.
_.tap = function(obj, interceptor) {
interceptor(obj);
return obj;
};
// Perform a deep comparison to check if two objects are equal.
_.isEqual = function(a, b) {
// Check object identity.
if (a === b) return true;
// Different types?
var atype = typeof(a), btype = typeof(b);
if (atype != btype) return false;
// Basic equality test (watch out for coercions).
if (a == b) return true;
// One is falsy and the other truthy.
if ((!a && b) || (a && !b)) return false;
// Unwrap any wrapped objects.
if (a._chain) a = a._wrapped;
if (b._chain) b = b._wrapped;
// One of them implements an isEqual()?
if (a.isEqual) return a.isEqual(b);
if (b.isEqual) return b.isEqual(a);
// Check dates' integer values.
if (_.isDate(a) && _.isDate(b)) return a.getTime() === b.getTime();
// Both are NaN?
if (_.isNaN(a) && _.isNaN(b)) return false;
// Compare regular expressions.
if (_.isRegExp(a) && _.isRegExp(b))
return a.source === b.source &&
a.global === b.global &&
a.ignoreCase === b.ignoreCase &&
a.multiline === b.multiline;
// If a is not an object by this point, we can't handle it.
if (atype !== 'object') return false;
// Check for different array lengths before comparing contents.
if (a.length && (a.length !== b.length)) return false;
// Nothing else worked, deep compare the contents.
var aKeys = _.keys(a), bKeys = _.keys(b);
// Different object sizes?
if (aKeys.length != bKeys.length) return false;
// Recursive comparison of contents.
for (var key in a) if (!(key in b) || !_.isEqual(a[key], b[key])) return false;
return true;
};
// Is a given array or object empty?
_.isEmpty = function(obj) {
if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
for (var key in obj) if (hasOwnProperty.call(obj, key)) return false;
return true;
};
// Is a given value a DOM element?
_.isElement = function(obj) {
return !!(obj && obj.nodeType == 1);
};
// Is a given value an array?
// Delegates to ECMA5's native Array.isArray
_.isArray = nativeIsArray || function(obj) {
return toString.call(obj) === '[object Array]';
};
// Is a given variable an object?
_.isObject = function(obj) {
return obj === Object(obj);
};
// Is a given variable an arguments object?
_.isArguments = function(obj) {
return !!(obj && hasOwnProperty.call(obj, 'callee'));
};
// Is a given value a function?
_.isFunction = function(obj) {
return !!(obj && obj.constructor && obj.call && obj.apply);
};
// Is a given value a string?
_.isString = function(obj) {
return !!(obj === '' || (obj && obj.charCodeAt && obj.substr));
};
// Is a given value a number?
_.isNumber = function(obj) {
return !!(obj === 0 || (obj && obj.toExponential && obj.toFixed));
};
// Is the given value `NaN`? `NaN` happens to be the only value in JavaScript
// that does not equal itself.
_.isNaN = function(obj) {
return obj !== obj;
};
// Is a given value a boolean?
_.isBoolean = function(obj) {
return obj === true || obj === false;
};
// Is a given value a date?
_.isDate = function(obj) {
return !!(obj && obj.getTimezoneOffset && obj.setUTCFullYear);
};
// Is the given value a regular expression?
_.isRegExp = function(obj) {
return !!(obj && obj.test && obj.exec && (obj.ignoreCase || obj.ignoreCase === false));
};
// Is a given value equal to null?
_.isNull = function(obj) {
return obj === null;
};
// Is a given variable undefined?
_.isUndefined = function(obj) {
return obj === void 0;
};
// Utility Functions
// -----------------
// Run Underscore.js in *noConflict* mode, returning the `_` variable to its
// previous owner. Returns a reference to the Underscore object.
_.noConflict = function() {
root._ = previousUnderscore;
return this;
};
// Keep the identity function around for default iterators.
_.identity = function(value) {
return value;
};
// Run a function **n** times.
_.times = function (n, iterator, context) {
for (var i = 0; i < n; i++) iterator.call(context, i);
};
// Add your own custom functions to the Underscore object, ensuring that
// they're correctly added to the OOP wrapper as well.
_.mixin = function(obj) {
each(_.functions(obj), function(name){
addToWrapper(name, _[name] = obj[name]);
});
};
// Generate a unique integer id (unique within the entire client session).
// Useful for temporary DOM ids.
var idCounter = 0;
_.uniqueId = function(prefix) {
var id = idCounter++;
return prefix ? prefix + id : id;
};
// By default, Underscore uses ERB-style template delimiters, change the
// following template settings to use alternative delimiters.
_.templateSettings = {
evaluate : /<%([\s\S]+?)%>/g,
interpolate : /<%=([\s\S]+?)%>/g
};
// JavaScript micro-templating, similar to John Resig's implementation.
// Underscore templating handles arbitrary delimiters, preserves whitespace,
// and correctly escapes quotes within interpolated code.
_.template = function(str, data) {
var c = _.templateSettings;
var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
'with(obj||{}){__p.push(\'' +
str.replace(/\\/g, '\\\\')
.replace(/'/g, "\\'")
.replace(c.interpolate, function(match, code) {
return "'," + code.replace(/\\'/g, "'") + ",'";
})
.replace(c.evaluate || null, function(match, code) {
return "');" + code.replace(/\\'/g, "'")
.replace(/[\r\n\t]/g, ' ') + "__p.push('";
})
.replace(/\r/g, '\\r')
.replace(/\n/g, '\\n')
.replace(/\t/g, '\\t')
+ "');}return __p.join('');";
var func = new Function('obj', tmpl);
return data ? func(data) : func;
};
// The OOP Wrapper
// ---------------
// If Underscore is called as a function, it returns a wrapped object that
// can be used OO-style. This wrapper holds altered versions of all the
// underscore functions. Wrapped objects may be chained.
var wrapper = function(obj) { this._wrapped = obj; };
// Expose `wrapper.prototype` as `_.prototype`
_.prototype = wrapper.prototype;
// Helper function to continue chaining intermediate results.
var result = function(obj, chain) {
return chain ? _(obj).chain() : obj;
};
// A method to easily add functions to the OOP wrapper.
var addToWrapper = function(name, func) {
wrapper.prototype[name] = function() {
var args = slice.call(arguments);
unshift.call(args, this._wrapped);
return result(func.apply(_, args), this._chain);
};
};
// Add all of the Underscore functions to the wrapper object.
_.mixin(_);
// Add all mutator Array functions to the wrapper.
each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
var method = ArrayProto[name];
wrapper.prototype[name] = function() {
method.apply(this._wrapped, arguments);
return result(this._wrapped, this._chain);
};
});
// Add all accessor Array functions to the wrapper.
each(['concat', 'join', 'slice'], function(name) {
var method = ArrayProto[name];
wrapper.prototype[name] = function() {
return result(method.apply(this._wrapped, arguments), this._chain);
};
});
// Start chaining a wrapped Underscore object.
wrapper.prototype.chain = function() {
this._chain = true;
return this;
};
// Extracts the result from a wrapped and chained object.
wrapper.prototype.value = function() {
return this._wrapped;
};
})();

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div {
font-family: Tahoma, Arial;
font-size: 10pt;
}
.results {
margin-bottom:20px;
padding: 10px;
border-top: 1pt solid lightsteelblue;
border-bottom: 1pt solid lightsteelblue;
}

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define(['postal', 'underscore'], function(postal, _) {
postal.addWireTap(function(data, envelope) {
var all = _.extend(envelope, { data: data });
if(!JSON) {
throw "This browser or environment does not provide JSON support";
}
try {
console.log(JSON.stringify(all));
}
catch(exception) {
try {
all.data = "ERROR: " + exception.message;
console.log(JSON.stringify(all));
}
catch(ex) {
console.log("Unable to parse data to JSON: " + exception);
}
}
});
});

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@ -0,0 +1 @@
define(["postal","underscore"],function(a,b){a.addWireTap(function(a,c){var d=b.extend(c,{data:a});if(!JSON)throw"This browser or environment does not provide JSON support";try{console.log(JSON.stringify(d))}catch(e){try{d.data="ERROR: "+e.message,console.log(JSON.stringify(d))}catch(f){console.log("Unable to parse data to JSON: "+e)}}})})

329
lib/browser/amd/postal.js Normal file
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define(['underscore'], function(_) {
/*
postal.js
Author: Jim Cowart
License: Dual licensed MIT (http://www.opensource.org/licenses/mit-license) & GPL (http://www.opensource.org/licenses/gpl-license)
Version 0.4.0
*/
var DEFAULT_EXCHANGE = "/",
DEFAULT_PRIORITY = 50,
DEFAULT_DISPOSEAFTER = 0,
NO_OP = function() { },
parsePublishArgs = function(args) {
var parsed = { envelope: { } }, env;
switch(args.length) {
case 3:
if(typeof args[1] === "Object" && typeof args[2] === "Object") {
parsed.envelope.exchange = DEFAULT_EXCHANGE;
parsed.envelope.topic = args[0];
parsed.payload = args[1];
env = parsed.envelope;
parsed.envelope = _.extend(env, args[2]);
}
else {
parsed.envelope.exchange = args[0];
parsed.envelope.topic = args[1];
parsed.payload = args[2];
}
break;
case 4:
parsed.envelope.exchange = args[0];
parsed.envelope.topic = args[1];
parsed.payload = args[2];
env = parsed.envelope;
parsed.envelope = _.extend(env, args[3]);
break;
default:
parsed.envelope.exchange = DEFAULT_EXCHANGE;
parsed.envelope.topic = args[0];
parsed.payload = args[1];
break;
}
return parsed;
};
var DistinctPredicate = function() {
var previous;
return function(data) {
var eq = false;
if(_.isString(data)) {
eq = data === previous;
previous = data;
}
else {
eq = _.isEqual(data, previous);
previous = _.clone(data);
}
return !eq;
};
};
var ChannelDefinition = function(exchange, topic) {
this.exchange = exchange;
this.topic = topic;
};
ChannelDefinition.prototype = {
subscribe: function(callback) {
var subscription = new SubscriptionDefinition(this.exchange, this.topic, callback);
postal.configuration.bus.subscribe(subscription);
return subscription;
},
publish: function(data, envelope) {
var env = _.extend({
exchange: this.exchange,
timeStamp: new Date(),
topic: this.topic
}, envelope);
postal.configuration.bus.publish(data, env);
}
};
var SubscriptionDefinition = function(exchange, topic, callback) {
this.exchange = exchange;
this.topic = topic;
this.callback = callback;
this.priority = DEFAULT_PRIORITY;
this.constraints = [];
this.maxCalls = DEFAULT_DISPOSEAFTER;
this.onHandled = NO_OP;
this.context = null;
};
SubscriptionDefinition.prototype = {
unsubscribe: function() {
postal.configuration.bus.unsubscribe(this);
},
defer: function() {
var fn = this.callback;
this.callback = function(data) {
setTimeout(fn,0,data);
};
return this;
},
disposeAfter: function(maxCalls) {
if(_.isNaN(maxCalls) || maxCalls <= 0) {
throw "The value provided to disposeAfter (maxCalls) must be a number greater than zero.";
}
var fn = this.onHandled;
var dispose = _.after(maxCalls, _.bind(function() {
this.unsubscribe(this);
}, this));
this.onHandled = function() {
fn.apply(this.context, arguments);
dispose();
};
return this;
},
ignoreDuplicates: function() {
this.withConstraint(new DistinctPredicate());
return this;
},
whenHandledThenExecute: function(callback) {
if(! _.isFunction(callback)) {
throw "Value provided to 'whenHandledThenExecute' must be a function";
}
this.onHandled = callback;
return this;
},
withConstraint: function(predicate) {
if(! _.isFunction(predicate)) {
throw "Predicate constraint must be a function";
}
this.constraints.push(predicate);
return this;
},
withConstraints: function(predicates) {
var self = this;
if(_.isArray(predicates)) {
_.each(predicates, function(predicate) { self.withConstraint(predicate); } );
}
return self;
},
withContext: function(context) {
this.context = context;
return this;
},
withDebounce: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = _.debounce(fn, milliseconds);
return this;
},
withDelay: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = function(data) {
setTimeout(fn, milliseconds, data);
};
return this;
},
withPriority: function(priority) {
if(_.isNaN(priority)) {
throw "Priority must be a number";
}
this.priority = priority;
return this;
},
withThrottle: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = _.throttle(fn, milliseconds);
return this;
}
};
var bindingsResolver = {
cache: { },
compare: function(binding, topic) {
if(this.cache[topic] && this.cache[topic][binding]) {
return true;
}
var rgx = new RegExp("^" + this.regexify(binding) + "$"), // match from start to end of string
result = rgx.test(topic);
if(result) {
if(!this.cache[topic]) {
this.cache[topic] = {};
}
this.cache[topic][binding] = true;
}
return result;
},
regexify: function(binding) {
return binding.replace(/\./g,"\\.") // escape actual periods
.replace(/\*/g, ".*") // asterisks match any value
.replace(/#/g, "[A-Z,a-z,0-9]*"); // hash matches any alpha-numeric 'word'
}
};
var localBus = {
subscriptions: {},
wireTaps: [],
publish: function(data, envelope) {
_.each(this.wireTaps,function(tap) {
tap(data, envelope);
});
_.each(this.subscriptions[envelope.exchange], function(topic) {
_.each(topic, function(binding){
if(postal.configuration.resolver.compare(binding.topic, envelope.topic)) {
if(_.all(binding.constraints, function(constraint) { return constraint(data); })) {
if(typeof binding.callback === 'function') {
binding.callback.apply(binding.context, [data, envelope]);
binding.onHandled();
}
}
}
});
});
},
subscribe: function(subDef) {
var idx, found, fn;
if(!this.subscriptions[subDef.exchange]) {
this.subscriptions[subDef.exchange] = {};
}
if(!this.subscriptions[subDef.exchange][subDef.topic]) {
this.subscriptions[subDef.exchange][subDef.topic] = [];
}
idx = this.subscriptions[subDef.exchange][subDef.topic].length - 1;
if(!_.any(this.subscriptions[subDef.exchange][subDef.topic], function(cfg) { return cfg === subDef; })) {
for(; idx >= 0; idx--) {
if(this.subscriptions[subDef.exchange][subDef.topic][idx].priority <= subDef.priority) {
this.subscriptions[subDef.exchange][subDef.topic].splice(idx + 1, 0, subDef);
found = true;
break;
}
}
if(!found) {
this.subscriptions[subDef.exchange][subDef.topic].unshift(subDef);
}
}
return _.bind(function() { this.unsubscribe(subDef); }, this);
},
unsubscribe: function(config) {
if(this.subscriptions[config.exchange][config.topic]) {
var len = this.subscriptions[config.exchange][config.topic].length,
idx = 0;
for ( ; idx < len; idx++ ) {
if (this.subscriptions[config.exchange][config.topic][idx] === config) {
this.subscriptions[config.exchange][config.topic].splice( idx, 1 );
break;
}
}
}
},
addWireTap: function(callback) {
this.wireTaps.push(callback);
return function() {
var idx = this.wireTaps.indexOf(callback);
if(idx !== -1) {
this.wireTaps.splice(idx,1);
}
};
}
};
var postal = {
configuration: {
bus: localBus,
resolver: bindingsResolver
},
channel: function(exchange, topic) {
var exch = arguments.length === 2 ? exchange : DEFAULT_EXCHANGE,
tpc = arguments.length === 2 ? topic : exchange;
return new ChannelDefinition(exch, tpc);
},
subscribe: function(exchange, topic, callback) {
var exch = arguments.length === 3 ? exchange : DEFAULT_EXCHANGE,
tpc = arguments.length === 3 ? topic : exchange,
callbk = arguments.length === 3 ? callback : topic;
var channel = this.channel(exch, tpc);
return channel.subscribe(callbk);
},
publish: function(exchange, topic, payload, envelopeOptions) {
var parsedArgs = parsePublishArgs([].slice.call(arguments,0));
var channel = this.channel(parsedArgs.envelope.exchange, parsedArgs.envelope.topic);
channel.publish(parsedArgs.payload, parsedArgs.envelope);
},
addWireTap: function(callback) {
this.configuration.bus.addWireTap(callback);
}
};
return postal; });

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1
lib/browser/amd/postal.min.js vendored Normal file
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@ -0,0 +1 @@
define(["underscore"],function(a){var b="/",c=50,d=0,e=function(){},f=function(c){var d={envelope:{}},e;switch(c.length){case 3:typeof c[1]=="Object"&&typeof c[2]=="Object"?(d.envelope.exchange=b,d.envelope.topic=c[0],d.payload=c[1],e=d.envelope,d.envelope=a.extend(e,c[2])):(d.envelope.exchange=c[0],d.envelope.topic=c[1],d.payload=c[2]);break;case 4:d.envelope.exchange=c[0],d.envelope.topic=c[1],d.payload=c[2],e=d.envelope,d.envelope=a.extend(e,c[3]);break;default:d.envelope.exchange=b,d.envelope.topic=c[0],d.payload=c[1]}return d},g=function(){var b;return function(c){var d=!1;return a.isString(c)?(d=c===b,b=c):(d=a.isEqual(c,b),b=a.clone(c)),!d}},h=function(a,b){this.exchange=a,this.topic=b};h.prototype={subscribe:function(a){var b=new i(this.exchange,this.topic,a);return l.configuration.bus.subscribe(b),b},publish:function(b,c){var d=a.extend({exchange:this.exchange,timeStamp:new Date,topic:this.topic},c);l.configuration.bus.publish(b,d)}};var i=function(a,b,f){this.exchange=a,this.topic=b,this.callback=f,this.priority=c,this.constraints=[],this.maxCalls=d,this.onHandled=e,this.context=null};i.prototype={unsubscribe:function(){l.configuration.bus.unsubscribe(this)},defer:function(){var a=this.callback;return this.callback=function(b){setTimeout(a,0,b)},this},disposeAfter:function(b){if(a.isNaN(b)||b<=0)throw"The value provided to disposeAfter (maxCalls) must be a number greater than zero.";var c=this.onHandled,d=a.after(b,a.bind(function(){this.unsubscribe(this)},this));return this.onHandled=function(){c.apply(this.context,arguments),d()},this},ignoreDuplicates:function(){return this.withConstraint(new g),this},whenHandledThenExecute:function(b){if(!a.isFunction(b))throw"Value provided to 'whenHandledThenExecute' must be a function";return this.onHandled=b,this},withConstraint:function(b){if(!a.isFunction(b))throw"Predicate constraint must be a function";return this.constraints.push(b),this},withConstraints:function(b){var c=this;return a.isArray(b)&&a.each(b,function(a){c.withConstraint(a)}),c},withContext:function(a){return this.context=a,this},withDebounce:function(b){if(a.isNaN(b))throw"Milliseconds must be a number";var c=this.callback;return this.callback=a.debounce(c,b),this},withDelay:function(b){if(a.isNaN(b))throw"Milliseconds must be a number";var c=this.callback;return this.callback=function(a){setTimeout(c,b,a)},this},withPriority:function(b){if(a.isNaN(b))throw"Priority must be a number";return this.priority=b,this},withThrottle:function(b){if(a.isNaN(b))throw"Milliseconds must be a number";var c=this.callback;return this.callback=a.throttle(c,b),this}};var j={cache:{},compare:function(a,b){if(this.cache[b]&&this.cache[b][a])return!0;var c=new RegExp("^"+this.regexify(a)+"$"),d=c.test(b);return d&&(this.cache[b]||(this.cache[b]={}),this.cache[b][a]=!0),d},regexify:function(a){return a.replace(/\./g,"\\.").replace(/\*/g,".*").replace(/#/g,"[A-Z,a-z,0-9]*")}},k={subscriptions:{},wireTaps:[],publish:function(b,c){a.each(this.wireTaps,function(a){a(b,c)}),a.each(this.subscriptions[c.exchange],function(d){a.each(d,function(d){l.configuration.resolver.compare(d.topic,c.topic)&&a.all(d.constraints,function(a){return a(b)})&&typeof d.callback=="function"&&(d.callback.apply(d.context,[b,c]),d.onHandled())})})},subscribe:function(b){var c,d,e;this.subscriptions[b.exchange]||(this.subscriptions[b.exchange]={}),this.subscriptions[b.exchange][b.topic]||(this.subscriptions[b.exchange][b.topic]=[]),c=this.subscriptions[b.exchange][b.topic].length-1;if(!a.any(this.subscriptions[b.exchange][b.topic],function(a){return a===b})){for(;c>=0;c--)if(this.subscriptions[b.exchange][b.topic][c].priority<=b.priority){this.subscriptions[b.exchange][b.topic].splice(c+1,0,b),d=!0;break}d||this.subscriptions[b.exchange][b.topic].unshift(b)}return a.bind(function(){this.unsubscribe(b)},this)},unsubscribe:function(a){if(this.subscriptions[a.exchange][a.topic]){var b=this.subscriptions[a.exchange][a.topic].length,c=0;for(;c<b;c++)if(this.subscriptions[a.exchange][a.topic][c]===a){this.subscriptions[a.exchange][a.topic].splice(c,1);break}}},addWireTap:function(a){return this.wireTaps.push(a),function(){var b=this.wireTaps.indexOf(a);b!==-1&&this.wireTaps.splice(b,1)}}},l={configuration:{bus:k,resolver:j},channel:function(a,c){var d=arguments.length===2?a:b,e=arguments.length===2?c:a;return new h(d,e)},subscribe:function(a,c,d){var e=arguments.length===3?a:b,f=arguments.length===3?c:a,g=arguments.length===3?d:c,h=this.channel(e,f);return h.subscribe(g)},publish:function(a,b,c,d){var e=f([].slice.call(arguments,0)),g=this.channel(e.envelope.exchange,e.envelope.topic);g.publish(e.payload,e.envelope)},addWireTap:function(a){this.configuration.bus.addWireTap(a)}};return l})

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@ -0,0 +1,18 @@
postal.addWireTap(function(data, envelope) {
var all = _.extend(envelope, { data: data });
if(!JSON) {
throw "This browser or environment does not provide JSON support";
}
try {
console.log(JSON.stringify(all));
}
catch(exception) {
try {
all.data = "ERROR: " + exception.message;
console.log(JSON.stringify(all));
}
catch(ex) {
console.log("Unable to parse data to JSON: " + exception);
}
}
});

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@ -0,0 +1,329 @@
(function(global, undefined) {
/*
postal.js
Author: Jim Cowart
License: Dual licensed MIT (http://www.opensource.org/licenses/mit-license) & GPL (http://www.opensource.org/licenses/gpl-license)
Version 0.4.0
*/
var DEFAULT_EXCHANGE = "/",
DEFAULT_PRIORITY = 50,
DEFAULT_DISPOSEAFTER = 0,
NO_OP = function() { },
parsePublishArgs = function(args) {
var parsed = { envelope: { } }, env;
switch(args.length) {
case 3:
if(typeof args[1] === "Object" && typeof args[2] === "Object") {
parsed.envelope.exchange = DEFAULT_EXCHANGE;
parsed.envelope.topic = args[0];
parsed.payload = args[1];
env = parsed.envelope;
parsed.envelope = _.extend(env, args[2]);
}
else {
parsed.envelope.exchange = args[0];
parsed.envelope.topic = args[1];
parsed.payload = args[2];
}
break;
case 4:
parsed.envelope.exchange = args[0];
parsed.envelope.topic = args[1];
parsed.payload = args[2];
env = parsed.envelope;
parsed.envelope = _.extend(env, args[3]);
break;
default:
parsed.envelope.exchange = DEFAULT_EXCHANGE;
parsed.envelope.topic = args[0];
parsed.payload = args[1];
break;
}
return parsed;
};
var DistinctPredicate = function() {
var previous;
return function(data) {
var eq = false;
if(_.isString(data)) {
eq = data === previous;
previous = data;
}
else {
eq = _.isEqual(data, previous);
previous = _.clone(data);
}
return !eq;
};
};
var ChannelDefinition = function(exchange, topic) {
this.exchange = exchange;
this.topic = topic;
};
ChannelDefinition.prototype = {
subscribe: function(callback) {
var subscription = new SubscriptionDefinition(this.exchange, this.topic, callback);
postal.configuration.bus.subscribe(subscription);
return subscription;
},
publish: function(data, envelope) {
var env = _.extend({
exchange: this.exchange,
timeStamp: new Date(),
topic: this.topic
}, envelope);
postal.configuration.bus.publish(data, env);
}
};
var SubscriptionDefinition = function(exchange, topic, callback) {
this.exchange = exchange;
this.topic = topic;
this.callback = callback;
this.priority = DEFAULT_PRIORITY;
this.constraints = [];
this.maxCalls = DEFAULT_DISPOSEAFTER;
this.onHandled = NO_OP;
this.context = null;
};
SubscriptionDefinition.prototype = {
unsubscribe: function() {
postal.configuration.bus.unsubscribe(this);
},
defer: function() {
var fn = this.callback;
this.callback = function(data) {
setTimeout(fn,0,data);
};
return this;
},
disposeAfter: function(maxCalls) {
if(_.isNaN(maxCalls) || maxCalls <= 0) {
throw "The value provided to disposeAfter (maxCalls) must be a number greater than zero.";
}
var fn = this.onHandled;
var dispose = _.after(maxCalls, _.bind(function() {
this.unsubscribe(this);
}, this));
this.onHandled = function() {
fn.apply(this.context, arguments);
dispose();
};
return this;
},
ignoreDuplicates: function() {
this.withConstraint(new DistinctPredicate());
return this;
},
whenHandledThenExecute: function(callback) {
if(! _.isFunction(callback)) {
throw "Value provided to 'whenHandledThenExecute' must be a function";
}
this.onHandled = callback;
return this;
},
withConstraint: function(predicate) {
if(! _.isFunction(predicate)) {
throw "Predicate constraint must be a function";
}
this.constraints.push(predicate);
return this;
},
withConstraints: function(predicates) {
var self = this;
if(_.isArray(predicates)) {
_.each(predicates, function(predicate) { self.withConstraint(predicate); } );
}
return self;
},
withContext: function(context) {
this.context = context;
return this;
},
withDebounce: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = _.debounce(fn, milliseconds);
return this;
},
withDelay: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = function(data) {
setTimeout(fn, milliseconds, data);
};
return this;
},
withPriority: function(priority) {
if(_.isNaN(priority)) {
throw "Priority must be a number";
}
this.priority = priority;
return this;
},
withThrottle: function(milliseconds) {
if(_.isNaN(milliseconds)) {
throw "Milliseconds must be a number";
}
var fn = this.callback;
this.callback = _.throttle(fn, milliseconds);
return this;
}
};
var bindingsResolver = {
cache: { },
compare: function(binding, topic) {
if(this.cache[topic] && this.cache[topic][binding]) {
return true;
}
var rgx = new RegExp("^" + this.regexify(binding) + "$"), // match from start to end of string
result = rgx.test(topic);
if(result) {
if(!this.cache[topic]) {
this.cache[topic] = {};
}
this.cache[topic][binding] = true;
}
return result;
},
regexify: function(binding) {
return binding.replace(/\./g,"\\.") // escape actual periods
.replace(/\*/g, ".*") // asterisks match any value
.replace(/#/g, "[A-Z,a-z,0-9]*"); // hash matches any alpha-numeric 'word'
}
};
var localBus = {
subscriptions: {},
wireTaps: [],
publish: function(data, envelope) {
_.each(this.wireTaps,function(tap) {
tap(data, envelope);
});
_.each(this.subscriptions[envelope.exchange], function(topic) {
_.each(topic, function(binding){
if(postal.configuration.resolver.compare(binding.topic, envelope.topic)) {
if(_.all(binding.constraints, function(constraint) { return constraint(data); })) {
if(typeof binding.callback === 'function') {
binding.callback.apply(binding.context, [data, envelope]);
binding.onHandled();
}
}
}
});
});
},
subscribe: function(subDef) {
var idx, found, fn;
if(!this.subscriptions[subDef.exchange]) {
this.subscriptions[subDef.exchange] = {};
}
if(!this.subscriptions[subDef.exchange][subDef.topic]) {
this.subscriptions[subDef.exchange][subDef.topic] = [];
}
idx = this.subscriptions[subDef.exchange][subDef.topic].length - 1;
if(!_.any(this.subscriptions[subDef.exchange][subDef.topic], function(cfg) { return cfg === subDef; })) {
for(; idx >= 0; idx--) {
if(this.subscriptions[subDef.exchange][subDef.topic][idx].priority <= subDef.priority) {
this.subscriptions[subDef.exchange][subDef.topic].splice(idx + 1, 0, subDef);
found = true;
break;
}
}
if(!found) {
this.subscriptions[subDef.exchange][subDef.topic].unshift(subDef);
}
}
return _.bind(function() { this.unsubscribe(subDef); }, this);
},
unsubscribe: function(config) {
if(this.subscriptions[config.exchange][config.topic]) {
var len = this.subscriptions[config.exchange][config.topic].length,
idx = 0;
for ( ; idx < len; idx++ ) {
if (this.subscriptions[config.exchange][config.topic][idx] === config) {
this.subscriptions[config.exchange][config.topic].splice( idx, 1 );
break;
}
}
}
},
addWireTap: function(callback) {
this.wireTaps.push(callback);
return function() {
var idx = this.wireTaps.indexOf(callback);
if(idx !== -1) {
this.wireTaps.splice(idx,1);
}
};
}
};
var postal = {
configuration: {
bus: localBus,
resolver: bindingsResolver
},
channel: function(exchange, topic) {
var exch = arguments.length === 2 ? exchange : DEFAULT_EXCHANGE,
tpc = arguments.length === 2 ? topic : exchange;
return new ChannelDefinition(exch, tpc);
},
subscribe: function(exchange, topic, callback) {
var exch = arguments.length === 3 ? exchange : DEFAULT_EXCHANGE,
tpc = arguments.length === 3 ? topic : exchange,
callbk = arguments.length === 3 ? callback : topic;
var channel = this.channel(exch, tpc);
return channel.subscribe(callbk);
},
publish: function(exchange, topic, payload, envelopeOptions) {
var parsedArgs = parsePublishArgs([].slice.call(arguments,0));
var channel = this.channel(parsedArgs.envelope.exchange, parsedArgs.envelope.topic);
channel.publish(parsedArgs.payload, parsedArgs.envelope);
},
addWireTap: function(callback) {
this.configuration.bus.addWireTap(callback);
}
};
global.postal = postal; })(window);