←  batch.js

var fs = require('fs'),
		path = require('path'),
		walk = require('walk'),
		_ = require('lodash'),
		mkdirp = require('mkdirp');

var traverse = function(firstEntry, filters, onFile, onEnd) {
	var isGoodEntry = function(entry) {
		return filters && filters.every(function(filter) {
			return !filter.test(entry);
		});
	};

	fs.stat(firstEntry, function(err, stat) {
		if(err) throw err;

		if(stat.isDirectory()) {
			var walker  = walk.walk(firstEntry, { followLinks: false });

			walker.on('file', function(root, stat, next) {
				var entry = path.join(root, stat.name);
				if(isGoodEntry(entry)) onFile(entry);
				next();
			});

			walker.on('end', function() {
				onEnd();
			});
		} else if(stat.isFile()) {
			if(isGoodEntry(firstEntry)) onFile(firstEntry);
			onEnd();
		}
	});
	
};

var docco = require('./single');

var doccoBatch = function(configs, done, options) {
	var numberOfRoots = configs.length;

	options = _.extend({
		templatePathIndex: (__dirname + "/templates/index.file.jst"),
		outputPath: "./docco"
	}, options);

	var processEntry = function(config, entry) {
		entries.push(entry);

		var htmlOutputPath = path.join(options.outputPath, entry + ".html");

		mkdirp(path.dirname(htmlOutputPath), function (err) {
			if(err) {
				console.log("Error, while creating dirs ");
				throw err;
			}

			new docco(config.config).processFile(entry, function() {},
			{
				outputPath: path.dirname(htmlOutputPath),
				rootDir: path.relative(path.dirname(htmlOutputPath), options.outputPath)
			});
		});
	};

	var entries = [];

	configs.forEach(function(config) {

		traverse(
			config.path, 
			config.filters, 
			function(entry) {
				processEntry(config, entry);
			},
			function() {
				if(--numberOfRoots === 0) {
					
					fs.readFile(options.templatePathIndex, 'utf8', function(err, tpl) {
						if(err) {
							console.log("Could not read template file: " + templatePathIndex);
							throw err;
						}

						var compiledTemplate = _.template(tpl);

						var dirs = _(entries)
							.groupBy(function(entry) {
								return path.dirname(entry);
							}).map(function(files, dir) {
								return {
									name: dir,
									files: files
								};
							}).sortBy(function(dir) {
								return dir.name;
							}).value();

						fs.writeFile(path.join(options.outputPath, "index.html"), 
							compiledTemplate({
								title: options.title,
								dirs: dirs
							}), 
							function(err) {
								if (err) throw err;
								done();
							}
						);
					});
				}
			});
	});
};

module.exports.traverse = traverse;
module.exports.doccoBatch = doccoBatch;