volofile

/*jslint regexp: true */
/*global define, console, process */

var crypto = require('crypto');
var fs = require('fs');
var path = require('path');
var buildDir = 'www-built';
var pagesDir = 'www-ghpages';

try {
    var ghdeploy = require('volo-ghdeploy')('www-built', 'www-ghdeploy');
}
catch(e) {
    console.log("You don't have the volo-ghdeploy command installed.\n" +
                'You must install this first:\n\n' +
                'npm install -g volo-ghdeploy');
    process.exit(1);
}

module.exports = {
    //Builds the JS and CSS into one file each. If you want to do
    //dynamic loading of scripts, pass -dynamic to the build, and
    //require.js will be used to load scripts.
    build: {
        flags: {
            //Does not print the build output.
            'q': 'quiet'
        },

        depends: ['less'],
        run: 'node tools/r.js -o tools/build.js'
    },

    //Generates an SHA1 digest that represents the contents of the
    //a directory. Call it like so: "volo digest dir=path/to/directory"
    digest: {
        validate: function (namedArgs) {
            var dir = namedArgs.dir;
            if (!dir) {
                return new Error('Please specify a target directory for ' +
                                 'the digest');
            }
            if (!path.existsSync(dir)) {
                return new Error('Target directory for digest does ' +
                                 'not exist: ' + dir);
            }
            return undefined;
        },

        run: function (d, v, namedArgs) {
            var q = v.require('q');
            var dir = namedArgs.dir,
            files = v.getFilteredFileList(dir),
            digests = [],
            i = 0;

            function getDigest(fileName) {
                var shaSum = crypto.createHash('sha1'),
                d = q.defer(),
                stream = fs.ReadStream(fileName);

                stream.on('data', function(data) {
                    shaSum.update(data);
                });

                stream.on('end', function() {
                    d.resolve(shaSum.digest('base64'));
                });

                return d.promise;
            }

            function digestFile(fileName) {
                getDigest(fileName).then(function (digest) {
                    var shaSum;

                    digests[i] = digest;
                    i += 1;

                    if (i < files.length) {
                        digestFile(files[i]);
                    } else {
                        //All done, now generate the final digest,
                        //using the combination of the other digests
                        shaSum = crypto.createHash('sha1');
                        shaSum.update(digests.join(','));
                        d.resolve(shaSum.digest('base64'));
                    }
                });
            }

            digestFile(files[0]);
        }
    },

    //Compile all the less files into css
    less: function(d, v, namedArgs) {
        var q = v.require('q');
        var files = v.getFilteredFileList('www/css');

        return q.all([
            files.map(function (path) {
                if (/\.less$/.test(path)) {
                    var dest = path.replace(/\.less$/, '.css');
                    return v.exec(['node tools/oneless.js ' + path + ' > ' + dest]);
                }
            })
        ])
            .then(function() {
                d.resolve();
            });
    },

    ghdeploy: ghdeploy,

    //Runs less on the .less files in tools/less to generate the CSS files.
    bootstrap_less: function (d, v, namedArgs) {
        q.all([
            v.exec('node tools/oneless.js tools/less/bootstrap.less > www/css/bootstrap.css'),
            v.exec('node tools/oneless.js tools/less/responsive.less > www/css/bootstrap-responsive.css')
        ])
            .then(function () {
                d.resolve();
            })
            .fail(d.reject);
    },

    appcache: function (d, v, namedArgs) {
        var q = v.require('q');
        var hasBuilt = v.exists(buildDir);

        v.command('build')
            .then(function () {
                var manifest = v.read('tools/manifest.appcache'),
                master = v.read(buildDir + '/index.html'),
                appFiles;

                appFiles = v.getFilteredFileList(buildDir);
                appFiles = appFiles.map(function (file) {
                    var start = file.indexOf('/' + buildDir + '/');
                    start = (start !== -1) ? (start + 11) : 0;
                    return file.substr(start, file.length);
                });

                master = master
                    .replace(/<html\s?/, '<html manifest="manifest.appcache" ')
                    .replace(/manifest\.appcache"\s>/, 'manifest.appcache">');
                v.write(buildDir + '/index.html', master);

                return v.command('digest', 'dir=' + buildDir)
                    .then(function (stamp) {
                        manifest = v.template(manifest, {
                            files : appFiles.join('\n'),
                            stamp : stamp
                        });
                        v.write(buildDir + '/manifest.appcache', manifest);
                    });
            })
            .then(function () {
                //Inform the user of the right mime type, but only do it if
                //there was not a previous build done.
                d.resolve(hasBuilt ? '': 'Be sure to set the mime type for ' +
                          '.appcache files to be: text/cache-manifest');
            })
            .fail(d.reject);
    },

    serve: function(d, v, namedArgs) {
        try {
            var connect = require('connect');
        }
        catch(e) {
            console.log('To use the `serve` command, you must ' +
                        'install the connect module:\n\n' + 
                        'npm install connect');
            return;
        }

        var lessMiddleware = require('less-middleware');

        var port = 8008;
        var base = path.join(process.cwd(), namedArgs.base || 'www');
        var middleware = [
            lessMiddleware({ src: base }),
            connect.static(base),
            connect.directory(base),
        ];

        connect.logger.format("OpenWebApp",
                              "[D] server :method :url :status " +
                              ":res[content-length] - :response-time ms");
        middleware.unshift(connect.logger("OpenWebApp"));

        console.log("starting web server on port " + port);
        connect.apply(null, middleware).listen(port);

    }
};