betajs/mock-file-server

module.exports = function(options) {
    
    var fileSystem = {

        files : {},

        cleanup : function() {
            console.log("Starting cleanup...");
            var current = (new Date()).getTime();
            for ( var filename in this.files) {
                var value = this.files[filename];
                if (value.age + options.clean <= current) {
                    console.log("Removing", filename);
                    this.remove(filename);
                }
            }
            console.log("Cleanup done.");
        },

        exists : function(filename) {
            return !!this.files[filename];
        },

        size : function(filename) {
            return this.files[filename].size;
        },

        read : function(filename) {
            return this.files[filename].buffer;
        },

        remove : function(filename) {
            delete this.files[filename];
            return this;
        },

        write : function(filename, buffer) {
            this.files[filename] = {
                size : buffer.length,
                buffer : buffer,
                age : (new Date()).getTime()
            };
            return this;
        }

    };

    setInterval(function() {
        fileSystem.cleanup();
    }, options.timer);

    return fileSystem;
};