enigma-bbs/core/mime_util.js

/* jslint node: true */
'use strict';

//	deps
const _			= require('lodash');

const mimeTypes	= require('mime-types');

exports.startup				= startup;
exports.resolveMimeType		= resolveMimeType;

function startup(cb) {
    //
    //	Add in types (not yet) supported by mime-db -- and therefor, mime-types
    //
    const ADDITIONAL_EXT_MIMETYPES = {
        ans				: 'text/x-ansi',
        gz				: 'application/gzip',	//	not in mime-types 2.1.15 :(
        lzx				: 'application/x-lzx',	//	:TODO: submit to mime-types
    };

    _.forEach(ADDITIONAL_EXT_MIMETYPES, (mimeType, ext) => {
        //	don't override any entries
        if(!_.isString(mimeTypes.types[ext])) {
            mimeTypes[ext] = mimeType;
        }

        if(!mimeTypes.extensions[mimeType]) {
            mimeTypes.extensions[mimeType] = [ ext ];
        }
    });

    return cb(null);
}

function resolveMimeType(query) {
    if(mimeTypes.extensions[query]) {
        return query;	//	alreaed a mime-type
    }

    return mimeTypes.lookup(query) || undefined;	//	lookup() returns false; we want undefined
}