File Browser For Substacks Terminal-Menu

gistfile1.js

var fs = require( 'fs' );
var path = require( 'path' );
var terminalMenu = require( 'terminal-menu' );
var getUnderline = require( './getUnderline' );


var FileBrowser = function( settings, onFileSelect ) {

	this.title = settings.title || 'Browse browse browse';
	this.startIdx = 0;
	this.maxFiles = settings.maxFiles || 10;
	this.path = settings.startPath || './';
	this.onFileSelect = onFileSelect;

	this.drawFolder();
};

FileBrowser.prototype.drawFolder = function() {

	if( this.menu ) {

		this.menu.close();
	}

	this.menu = terminalMenu( { width: 29, x: 4, y: 2 } );
	this.menu.reset();

	this.menu.write( this.title + '\n' );

	this.menu.write( getUnderline( this.title ) + '\n' );

	var files = fs.readdirSync( this.path ); 
	var hadMoreFiles = false;

	if( this.startIdx != 0 ) {

		this.menu.add( '---PREV---' );
		this.menu.write( '\n' );
	} else {

		this.menu.add( '.' );
		this.menu.add( '..' );
	}

	for( var i = this.startIdx, len = files.length; i < len && i - this.startIdx < this.maxFiles; i++ ) {

		this.menu.add( files[ i ] );

		hadMoreFiles = i + 1 - this.startIdx == this.maxFiles;
	}

	if( hadMoreFiles ) {

		this.menu.write( '\n' );
		this.menu.add( '---NEXT---' );
	}

	this.menu.on( 'select', this.onItemSelect.bind( this ) );

	this.menu.createStream().pipe(process.stdout);
};

FileBrowser.prototype.onItemSelect = function( file ) {

	if( file == '---NEXT---' ) {

		this.startIdx += this.maxFiles;
		this.drawFolder();
	} else if( file == '---PREV---' ) {

		this.startIdx -= this.maxFiles;
		this.drawFolder();
	} else {

		var stat = fs.statSync( path.join( this.path, file ) );

		if( stat.isDirectory() ) {

			this.path = path.join( this.path, file );
			this.startIdx = 0;

			this.drawFolder();
		} else {

			this.menu.reset();
			this.menu.close();
			this.onFileSelect( file );
		}
	}
};

module.exports = FileBrowser;