Added association support (by filename and mime-type).

Author: RReverser

src/jBinary.js

@@ -8,6 +8,13 @@ if (!('atob' in global) || !('btoa' in global)) {
 (function(){var t=global,r="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",n=function(){try{document.createElement("$")}catch(t){return t}}();t.btoa||(t.btoa=function(t){for(var o,e,a=0,c=r,f="";t.charAt(0|a)||(c="=",a%1);f+=c.charAt(63&o>>8-8*(a%1))){if(e=t.charCodeAt(a+=.75),e>255)throw n;o=o<<8|e}return f}),t.atob||(t.atob=function(t){if(t=t.replace(/=+$/,""),1==t.length%4)throw n;for(var o,e,a=0,c=0,f="";e=t.charAt(c++);~e&&(o=a%4?64*o+e:e,a++%4)?f+=String.fromCharCode(255&o>>(6&-2*a)):0)e=r.indexOf(e);return f})})();
 }
 
+
+// http://cdnjs.cloudflare.com/ajax/libs/json2/20110223/json2.min.js
+if (!('JSON' in global)) {
+// jshint:skipline
+JSON={};(function(){function k(a){return a<10?"0"+a:a}function o(a){p.lastIndex=0;return p.test(a)?'"'+a.replace(p,function(a){var c=r[a];return typeof c==="string"?c:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+a+'"'}function l(a,j){var c,d,h,m,g=e,f,b=j[a];b&&typeof b==="object"&&typeof b.toJSON==="function"&&(b=b.toJSON(a));typeof i==="function"&&(b=i.call(j,a,b));switch(typeof b){case "string":return o(b);case "number":return isFinite(b)?String(b):"null";case "boolean":case "null":return String(b);case "object":if(!b)return"null";e+=n;f=[];if(Object.prototype.toString.apply(b)==="[object Array]"){m=b.length;for(c=0;c<m;c+=1)f[c]=l(c,b)||"null";h=f.length===0?"[]":e?"[\n"+e+f.join(",\n"+e)+"\n"+g+"]":"["+f.join(",")+"]";e=g;return h}if(i&&typeof i==="object"){m=i.length;for(c=0;c<m;c+=1)typeof i[c]==="string"&&(d=i[c],(h=l(d,b))&&f.push(o(d)+(e?": ":":")+h))}else for(d in b)Object.prototype.hasOwnProperty.call(b,d)&&(h=l(d,b))&&f.push(o(d)+(e?": ":":")+h);h=f.length===0?"{}":e?"{\n"+e+f.join(",\n"+e)+"\n"+g+"}":"{"+f.join(",")+"}";e=g;return h}}if(typeof Date.prototype.toJSON!=="function")Date.prototype.toJSON=function(){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+k(this.getUTCMonth()+1)+"-"+k(this.getUTCDate())+"T"+k(this.getUTCHours())+":"+k(this.getUTCMinutes())+":"+k(this.getUTCSeconds())+"Z":null},String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(){return this.valueOf()};var q=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,p=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,e,n,r={"\u0008":"\\b","\t":"\\t","\n":"\\n","\u000c":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},i;if(typeof JSON.stringify!=="function")JSON.stringify=function(a,j,c){var d;n=e="";if(typeof c==="number")for(d=0;d<c;d+=1)n+=" ";else typeof c==="string"&&(n=c);if((i=j)&&typeof j!=="function"&&(typeof j!=="object"||typeof j.length!=="number"))throw Error("JSON.stringify");return l("",{"":a})};if(typeof JSON.parse!=="function")JSON.parse=function(a,e){function c(a,d){var g,f,b=a[d];if(b&&typeof b==="object")for(g in b)Object.prototype.hasOwnProperty.call(b,g)&&(f=c(b,g),f!==void 0?b[g]=f:delete b[g]);return e.call(a,d,b)}var d,a=String(a);q.lastIndex=0;q.test(a)&&(a=a.replace(q,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)}));if(/^[\],:{}\s]*$/.test(a.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,"")))return d=eval("("+a+")"),typeof e==="function"?c({"":d},""):d;throw new SyntaxError("JSON.parse");}})();
+}
+
 var hasRequire = typeof require === 'function';
 
 var jDataView;
@@ -68,22 +75,28 @@ proto.cacheKey = 'jBinary.Cache';
 proto.id = 0;
 
 var defineProperty = Object.defineProperty;
-// this is needed to detect broken Object.defineProperty in IE8:
-try {
-	defineProperty({}, 'x', {});
-} catch (e) {
-	defineProperty = null;
+
+if (defineProperty) {
+	// this is needed to detect broken Object.defineProperty in IE8:
+	try {
+		defineProperty({}, 'x', {});
+	} catch (e) {
+		defineProperty = null;
+	}
+}
+
+if (!defineProperty) {
+	defineProperty = function (obj, key, descriptor, allowVisible) {
+		if (allowVisible) {
+			obj[key] = descriptor.value;
+		}
+	};
 }
 
 proto._getCached = function (obj, valueAccessor, allowVisible) {
 	if (!obj.hasOwnProperty(this.cacheKey)) {
 		var value = valueAccessor.call(this, obj);
-		if (defineProperty) {
-			defineProperty(obj, this.cacheKey, {value: value});
-		} else
-		if (allowVisible) {
-			obj[this.cacheKey] = value;
-		}
+		defineProperty(obj, this.cacheKey, {value: value}, allowVisible);
 		return value;
 	} else {
 		return obj[this.cacheKey];
@@ -709,17 +722,19 @@ var getScript = (function () {
 			script.src = url;
 			script.defer = true;
 
-			if (!('onload' in script)) {
-				script.onreadystatechange = function () {
-					console.log(this.src, ' ', this.readyState);
-					if (this.readyState === 'loaded' || this.readyState === 'complete') {
-						this.onreadystatechange = null;
-						this.onload();
-					}
-				};
-			}
+			if (callback) {
+				if (!('onload' in script)) {
+					script.onreadystatechange = function () {
+						console.log(this.src, ' ', this.readyState);
+						if (this.readyState === 'loaded' || this.readyState === 'complete') {
+							this.onreadystatechange = null;
+							this.onload();
+						}
+					};
+				}
 
-			script.onload = script.onerror = callback;
+				script.onload = script.onerror = callback;
+			}
 
 			head.appendChild(script);
 		};
@@ -733,7 +748,9 @@ var getScript = (function () {
 					// jshint:skipline
 					eval(body);
 				}
-				callback();
+				if (callback) {
+					callback();
+				}
 			});
 		};
 	}
@@ -776,6 +793,42 @@ var repo = jBinary.Repo = function (names, callback) {
 	});
 };
 
+repo.getAssociations = function (callback) {
+	// lazy loading data by replacing `jBinary.Repo.getAssociations` itself
+	getScript('https://rawgithub.com/jDataView/jBinary.Repo/gh-pages/associations.js', function () {
+		repo.getAssociations(callback);
+	});
+};
+
+repo.getAssociation =  function (source, _callback) {
+	var callback = function (typeSetName) {
+		repo(typeSetName, _callback);
+	};
+
+	repo.getAssociations(function (assoc) {
+		if (source.fileName) {
+			var fileParts = source.fileName.toLowerCase().split('.').slice(1);
+			// trying everything from longest possible extension to shortest one
+			for (var i = 0, length = fileParts.length; i < length; i++) {
+				var extension = fileParts.slice(i).join('.'),
+					typeSetName = assoc.extensions[extension];
+
+				if (typeSetName) {
+					return callback(typeSetName);
+				}
+			}
+		}
+		if (source.mimeType) {
+			var typeSetName = assoc.mimeTypes[source.mimeType];
+
+			if (typeSetName) {
+				return callback(typeSetName);
+			}
+		}
+		_callback();
+	});
+};
+
 if (typeof module === 'object' && module && typeof module.exports === 'object') {
 	jDataView = require('jDataView');
 	module.exports = jBinary;

test/test.js

@@ -56,6 +56,8 @@ if (typeof JSHINT !== 'undefined') {
 						}
 						ok(false, 'Line ' + error.line + ', character ' + error.character + ': ' + error.reason);
 						console.log(error);
+					} else {
+						errorCount--;
 					}
 				}
 				if (!errorCount) {
@@ -236,6 +238,38 @@ asyncTest('Cached type', function () {
 	});
 });
 
+module('File associations');
+
+asyncTest('Loading list', function () {
+	jBinary.Repo.getAssociations(function (assoc) {
+		start();
+		ok(assoc);
+		ok(assoc.extensions);
+		ok(assoc.mimeTypes);
+
+		// check caching
+		stop();
+		jBinary.Repo.getAssociations(function (assoc2) {
+			start();
+			equal(assoc, assoc2);
+		});
+	});
+});
+
+asyncTest('By file extension', function () {
+	jBinary.Repo.getAssociation({fileName: 'sample.mp3'}, function (typeSet) {
+		start();
+		equal(typeSet, jBinary.Repo.MP3);
+	});
+});
+
+asyncTest('By mime-type', function () {
+	jBinary.Repo.getAssociation({mimeType: 'image/bmp'}, function (typeSet) {
+		start();
+		equal(typeSet, jBinary.Repo.BMP);
+	});
+});
+
 //-----------------------------------------------------------------
 
 module('Value Read', {