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var fs = require('file');
var util = require('util');
var sandboxing = require('sandbox');
var Loader = sandboxing.Loader;
var AttenuatedLoader = sandboxing.AttenuatedLoader;
var Sandbox = sandboxing.Sandbox;
var contentType = "application/x-javascript";
exports.Bundler = function (system) {
var self = {};
system = util.copy(system);
system.platforms = util.copy(system.platforms);
system.platforms.unshift('browser');
var paths = util.copy(require.paths);
paths.unshift(system.prefix + '/platforms/browser/lib');
var loader = AttenuatedLoader(Loader({"paths": paths}));
var sandbox = Sandbox({'loader': loader, 'system': system});
sandbox.force('system');
sandbox('global');
sandbox('packages').main();
self.dependencies = function (baseId) {
var dependencies = [];
loader.fetch(baseId).replace(
/require\s*\(\s*(['"])([^'"]+)\1\s*\)/g,
function (all, quote, id) {
dependencies.push(loader.resolve(id, baseId));
return all;
}
);
return dependencies;
};
self.transitiveDependencies = function (id, visited) {
var result = [];
if (!visited)
visited = {};
if (util.has(visited, id))
return result;
visited[id] = true;
result.push(id);
self.dependencies(id).forEach(function (id) {
result.push.apply(
result,
self.transitiveDependencies(id, visited)
);
});
return result;
};
self.module = function (id) {
return loader.fetch(id);
};
self.factory = function (id) {
if (util.has(factories, id))
return util.get(factories, id);
var factory = (
'require.register(' + util.enquote(id) + ',' +
'function(require,exports,module,system,print){' +
loader.fetch(id) +
'/**/\n});'
);
util.set(factories, id, factory);
return factory;
};
self.factories = function (id) {
return self.dependencies(id).map(self.factory).join('');
};
self.transitiveFactories = function (id) {
return self.transitiveDependencies(id).map(self.factory).join('');
};
self.bundle = function (id) {
var bootstrap = fs.path(module.path).resolve('../../platforms/browser/bootstrap.js').read();
return exports.jsmin(bootstrap).replace(/\s*$/, '') + '.call(this,' + self.factories(id) + ')';
};
self.inline = function (id, path) {
var inline = fs.path(module.path).resolve('../../platforms/browser/inline.js').read().replace(/\s*$/, '');
var ids = self.transitiveDependencies(id).concat(['sandbox']);
util.sort(ids, util.by(function (id) {
return -self.factory(id).length;
}));
return inline + '.call(this, ' +
JSON.encode(ids) + ',' +
JSON.encode(id) + ',' +
JSON.encode(path) +
')';
};
var timestamps = {};
var factories = {};
self.App = function () {
// modules?{id} that loads modules from module/{id}
// module/{id}.js
// bundle/{id}.js -> including {guids} for postcache, including cache prediction, including loader
// version/{mtime}/{id}.js -> minified, factorized, cached, mtime verified
return require("jack/directory").Directory({
'module': self.moduleApp,
'bundle': self.bundleApp,
'factory': self.factoryApp
});
};
self.moduleApp = function (env) {
var id = env.PATH_INFO.replace(/^\//, '').replace(/\.js$/, '');
return [
200,
{"Content-type": contentType},
[self.module(id)]
];
};
self.bundleApp = function (env) {
var id = env.PATH_INFO.replace(/^\//, '').replace(/\.js$/, '');
return [
200,
{"Content-type": contentType},
[self.transitiveFactories(id)]
];
};
self.factoryApp = function (env) {
var id = env.PATH_INFO.replace(/^\//, '').replace(/\.js$/, '');
return [200, {"Content-type": contentType}, [self.factory(id)]];
};
return self;
};
exports.jsmin = function (text) {
if (require("jsmin").encode === undefined)
throw new Error("I should not be.");
return require("jsmin").encode(text);
};
exports.App = function (app, path) {
// TODO use path
var bundler = exports.Bundler(system);
var jsApp = bundler.App();
return function (env) {
if (/^\/js\//.test(env.PATH_INFO)) {
env.SCRIPT_NAME = env.SCRIPT_NAME + 'js/';
env.PATH_INFO = env.PATH_INFO.substring(3);
return jsApp(env);
}
var self = {};
self.inline = function (id) {
return bundler.inline(id, env.SCRIPT_NAME + 'js/factory/');
};
self.xhr = function (id) {
return env.javascript.path + '/module/modules?path=' + env.javascript.path + '/module/&' + id;
};
self.path = env.SCRIPT_NAME + '/js';
env.javascript = self;
return app(env);
};
};
if (require.main == module.id) {
var app = require('jack/directory').Directory(
{
/* this is the inline script solution that uses
* massively parallel script injection and a heuristic
* for transitive dependencies */
"": function (env) {
return [
200,
{'Content-type': 'text/html'},
[
'<html><head><script>' +
env.javascript.inline('narwhal/server-test') +
'</script></head><body></body></html>'
]
];
},
/* this uses dynamic, synchronous http requests */
"xhr": function (env) {
return [
200,
{'Content-type': 'text/html'},
[
'<script src="' +
env.javascript.xhr('narwhal/server-test') +
'"></script>'
]
];
}
}
);
app = exports.App(app);
app = require("jack").ContentLength(app);
exports.app = app;
require("jackup").main(["jackup", module.path]);
}
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