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var _ = require('lodash');
var path = require('path');
var Q = require('q');
var fs = require("./fs");
var extsToIgnore = [".gz"]
var Manifest = function() {
this.revision = 0;
this.clear(Date.now());
};
// Regenerate manifest
Manifest.prototype.clear = function(revision) {
if (revision) this.revision = revision;
this.sections = {
'CACHE': {},
'NETWORK': {},
'FALLBACK': {}
};
return Q(this);
};
// Add a resource
Manifest.prototype.add = function(category, resource, value) {
if (_.isArray(resource)) {
_.each(resource, function(subres) {
this.add(category, subres, value);
}, this);
return;
}
this.sections[category][resource] = value;
};
// Add a directory in cache
Manifest.prototype.addFolder = function(folder, root, except) {
var that = this;
root = root || "/";
return fs.list(folder)
.then(function(files) {
_.each(
// Ignore diretcories
_.filter(files, function(file) {
return file.substr(-1) != "/" && !_.contains(except, path.join(root, file)) && !_.contains(extsToIgnore, path.extname(file));
}),
function(file) {
that.add("CACHE", path.join(root, file));
}
);
})
};
// Get manifest content
Manifest.prototype.dump = function() {
var lines = [
"CACHE MANIFEST",
"# Revision "+this.revision
];
_.each(this.sections, function(content, section) {
if (_.size(content) == 0) return;
lines.push("");
lines.push(section+":");
lines = lines.concat(_.keys(content));
}, this);
return Q(lines.join("\n"));
};
module.exports = Manifest;
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