denis-sokolov/portent

'use strict';

var cleanup = require('./cleanup');
var renderFactory = require('./render');
var templatesFactory = require('./templates');

module.exports = function(projectDirectory, plugins, options){
    options = options || {};
    options.minify = Boolean(options.minify);

    var templates = templatesFactory(projectDirectory);
    var render = renderFactory(templates, plugins);

    var send = function(res){
        return function(html){
            html = cleanup(html, options.minify);

            // Allegedly there may be cases where IE disregards
            // the meta tag on non-standard ports, which is exactly where
            // development happens.
            res.set('X-UA-Compatible', 'IE=edge');

            res.send(html);
        };
    };

    var fail = function(next){
        return function(err){
            if (err.templateNotFound)
                return next();
            next(err);
        };
    };

    return {
        middlewares: [
            function(req, res, next){
                var path = decodeURI(req.path);
                if (path.indexOf('/_') > -1)
                    return next();
                if (path.match(/\/index$/))
                    return next();
                if (path.match(/\/$/))
                    path += 'index';
                render(req, path)
                    .then(send(res), fail(next));
            },
            function(req, res, next){
                var path = decodeURI(req.path);
                if (!path.match(/^\/\.\d{3}$/))
                    return next();
                render.error(req, path.substr(2))
                    .then(send(res), fail(next));
            },
            function(req, res, next){
                res.status(404);
                render.error(req, 404)
                    .then(send(res), fail(next));
            }
        ],
        paths: function(){
            return Promise.all([
                templates.errors(),
                templates.pages()
            ]).then(function(res){
                var foundErrors = res[0].map(code => '.' + code);
                var foundPages = res[1];
                return foundErrors.concat(foundPages)
                    .map(p => [p.normalize('NFC'), p.normalize('NFD')])
                    .reduce((a, b) => a.concat(b));
            });
        }
    };
};