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var SPLITER = /[ ,]+/;
function Mime(){
this.types = {};
this.extensions = {};
this.defaultType = "text/plain";
this.defaultExtension = "txt";
this.register("*/*", "*");
this.register("text/html", "html htm xhtml");
this.register("text/plain", "txt");
this.register("application/javascript", "js");
this.register("text/css", "css");
this.register("text/calendar", "ics");
this.register("text/csv", "csv");
this.register("image/png", "png");
this.register("image/jpeg", "jpeg jpg");
this.register("image/gif", "gif");
this.register("image/bmp", "bmp");
this.register("image/x-icon", "ico");
this.register("image/tiff", "tiff tif");
this.register("image/svg+xml", "svg");
this.register("video/mpeg", "mpg mpeg mpe");
this.register("application/xml", "xml");
this.register("application/rss+xml", "rss");
this.register("application/atom+xml", "atom");
this.register("application/x-yaml", "yaml");
this.register("multipart/form-data", "multipart_form");
this.register("application/x-www-form-urlencoded", "url_encoded_form");
this.register("application/x-font-ttf", "ttf");
this.register("application/x-font-truetype", "ttf");
this.register("application/x-font-opentype", "otf");
this.register("application/font-woff", "woff");
this.register("application/vnd.ms-fontobject", "eot");
this.register("application/json", "map");
this.register("application/json", "json");
this.register("application/pdf", "pdf");
this.register("application/zip", "zip");
}
Mime.prototype.register = function(type, exts){
var types = this.types,
extensions = this.extensions,
ext,
i;
exts = exts.split(SPLITER);
for (i = exts.length; i--;) {
ext = exts[i];
if (!ext.length) continue;
if (!extensions[ext]) extensions[ext] = type;
}
if (!types[type] && exts[0]) types[type] = exts[0];
return this;
};
Mime.prototype.unregister = function(exts){
var types = this.types,
extensions = this.extensions,
key, i;
exts = exts.split(SPLITER);
for (i = exts.length; i--;) {
ext = exts[i];
if (!ext.length) continue;
for (key in types) {
if (types[key] === ext) types[key] = undefined;
}
extensions[ext] = undefined;
}
return this;
};
Mime.prototype.unregisterType = function(type){
var types = this.types,
extensions = this.extensions,
key, i;
for (key in extensions) {
if (extensions[key] === type) extensions[key] = undefined;
}
types[type] = undefined;
return this;
};
Mime.prototype.lookUpType = function(ext, fallback){
var type = this.extensions[ext];
fallback = fallback === undefined ? true : !!fallback;
return type ? type : fallback ? this.defaultType : undefined;
};
Mime.prototype.lookUpExt = function(type, fallback){
var ext = this.types[type];
fallback = fallback === undefined ? true : !!fallback;
return ext ? ext : fallback ? this.defaultExtension : undefined;
};
module.exports = new Mime;
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