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fs.js
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fs.js
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/**
* Module Dependencies
*/
var Filequeue = require('filequeue');
var fq = new Filequeue();
var path = require('path');
/**
* Intialiaze a new FsKDb (Filesystem Key Database)
* @param {String} baseDir Base Directory in which keys are stored
*/
function FsKDb(baseDir) {
this.baseDir = baseDir;
return this;
}
/**
* Find a single key from the email uid
* @param {String} email Email uid to retrieve a key for
* @param {Function} callback Function to evaluate with the results of the find
*/
FsKDb.prototype.findOne = function(email, callback) {
var parts = email.split('@'),
domain = parts[1],
user = parts[0],
keyPath = path.resolve(this.baseDir, domain, user);
fq.exists(keyPath, function(exists) {
if(!exists) {
callback(); // no key found
return;
}
fq.readFile(keyPath, 'utf8', function(err, keytext) {
if(err) {
callback(err);
return;
}
if(!keytext || (keytext && !keytext.length)) {
callback(); // file exists but it is empty
return;
}
callback(null, {
uid:email,
user: user,
domain: domain,
keytext: keytext
});
});
});
};
/**
* Find all the keys for this server
* @param {String} domain Optional domain in which to search for keys
* @param {Function} callback Function to evaluate with the results of the find
*/
FsKDb.prototype.find = function(domain, callback) {
if(!callback) {
callback = domain;
domain = null;
}
var baseDir = this.baseDir,
keys = [];
var getUsers = function(domain, callback) {
// get all the users for the domain
fq.readdir(path.resolve(baseDir, domain), function(err, users) {
if(err) {
callback(err);
return;
}
users.forEach(function(user) {
// add to the array with the email as the uid
keys.push({
uid: user + '@' + domain,
user: user,
domain: domain
});
});
callback(null, keys.sort()); // sort the keys prior to returning them
});
};
if(domain) {
fq.exists(path.resolve(baseDir, domain), function(exists) {
if(!exists) {
// no users for this domain
callback();
return;
}
// get only users for the defined domain
getUsers(domain, callback);
});
return;
}
// get all the domains stored in the directory
fq.readdir(path.resolve(baseDir), function(err, domains) {
if(err) {
callback(err);
return;
}
if(!domains || (domains && !domains.length)) {
callback(null, keys);
return;
}
var count = 0;
domains.forEach(function(domain) {
getUsers(domain, function(err, keys) {
if(err) {
callback(err);
return;
}
if(++count === domains.length) { // the last domain has been fetched
callback(null, keys);
}
});
});
});
};
/**
* Add a key to the database
* @param {String} email Email to associate with the key
* @param {String} keytext ASCII-armored keytext including headers
* @param {Function} callback Function to evaluate with an error or the added key on success
*/
FsKDb.prototype.add = function(email, keytext, callback) {
var parts = email.split('@'),
domain = parts[1],
user = parts[0],
domainPath = path.resolve(this.baseDir, domain),
keyPath = path.resolve(this.baseDir, domain, user);
var createKey = function(cb) {
fq.writeFile(keyPath, keytext, 'utf8', function(err) {
if(err) {
cb(err);
return;
}
cb(null, {
uid:email,
user:user,
domain:domain,
keytext:keytext
});
});
};
fq.exists(domainPath, function(exists) {
if(!exists) {
fq.mkdir(domainPath, function(err) {
if(err) {
callback(err);
return;
}
createKey(callback);
});
return;
}
createKey(callback);
});
};
/**
* Export the FsKDb object
*/
module.exports = FsKDb;