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index.js
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index.js
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'use strict';
var BPromise = require('bluebird');
var PouchDB = require('pouchdb');
var util = require('./../util');
var seed = require('pouchdb-seed-design');
var request = require('superagent');
module.exports = function (config, userDB, couchAuthDB) {
var cloudant = config.getItem('dbServer.cloudant');
var adapter;
if(cloudant) {
adapter = require('./cloudant');
} else {
var CouchAdapter = require('./couchdb');
adapter = new CouchAdapter(couchAuthDB);
}
this.storeKey = function (username, key, password, expires, roles) {
return adapter.storeKey(username, key, password, expires, roles);
};
this.removeKeys = function(keys) {
return adapter.removeKeys(keys);
};
this.authorizeKeys = function (user_id, db, keys, permissions, roles) {
return adapter.authorizeKeys(user_id, db, keys, permissions, roles);
};
this.deauthorizeKeys = function (db, keys) {
return adapter.deauthorizeKeys(db, keys);
};
this.authorizeUserSessions = function(user_id, personalDBs, sessionKeys, roles) {
var self = this;
var promises = [];
sessionKeys = util.toArray(sessionKeys);
Object.keys(personalDBs).forEach(function(personalDB) {
var permissions = personalDBs[personalDB].permissions;
if(!permissions) {
permissions = config.getItem('userDBs.model.' + personalDBs[personalDB].name + '.permissions') || config.getItem('userDBs.model._default.permissions') || [];
}
var db = new PouchDB(util.getDBURL(config.getItem('dbServer')) + '/' + personalDB);
promises.push(self.authorizeKeys(user_id, db, sessionKeys, permissions, roles));
});
return BPromise.all(promises);
};
this.addUserDB = function (userDoc, dbName, designDocs, type, permissions, adminRoles, memberRoles) {
var self = this;
var promises = [];
adminRoles = adminRoles || [];
memberRoles = memberRoles || [];
// Create and the database and seed it if a designDoc is specified
var prefix = config.getItem('userDBs.privatePrefix') ? config.getItem('userDBs.privatePrefix') + '_' : '';
var finalDBName, newDB;
// Make sure we have a legal database name
var username = userDoc._id;
username = getLegalDBName(username);
if(type === 'shared') {
finalDBName = dbName;
} else {
finalDBName = prefix + dbName + '$' + username;
}
return self.createDB(finalDBName)
.then(function() {
newDB = new PouchDB(util.getDBURL(config.getItem('dbServer')) + '/' + finalDBName);
return adapter.initSecurity(newDB, adminRoles, memberRoles);
})
.then(function() {
// Seed the design docs
if (designDocs && designDocs instanceof Array) {
designDocs.forEach(function(ddName) {
var dDoc = self.getDesignDoc(ddName);
if(dDoc) {
promises.push(seed(newDB, dDoc));
} else {
console.warn('Failed to locate design doc: ' + ddName);
}
});
}
// Authorize the user's existing DB keys to access the new database
var keysToAuthorize = [];
if (userDoc.session) {
for (var key in userDoc.session) {
if(userDoc.session.hasOwnProperty(key) && userDoc.session[key].expires > Date.now()) {
keysToAuthorize.push(key);
}
}
}
if (keysToAuthorize.length > 0) {
promises.push(self.authorizeKeys(userDoc._id, newDB, keysToAuthorize, permissions, userDoc.roles));
}
return BPromise.all(promises);
})
.then(function() {
return BPromise.resolve(finalDBName);
});
};
this.removeExpiredKeys = function () {
var self = this;
var keysByUser = {};
var userDocs = {};
var expiredKeys = [];
// query a list of expired keys by user
return userDB.query('auth/expiredKeys', {endkey: Date.now(), include_docs: true})
.then(function(results) {
// group by user
results.rows.forEach(function(row) {
keysByUser[row.value.user] = row.value.key;
expiredKeys.push(row.value.key);
// Add the user doc if it doesn't already exist
if(typeof userDocs[row.value.user] === 'undefined') {
userDocs[row.value.user] = row.doc;
}
// remove each key from user.session
if(userDocs[row.value.user].session) {
Object.keys(userDocs[row.value.user].session).forEach(function(session) {
if(row.value.key === session) {
delete userDocs[row.value.user].session[session];
}
});
}
});
return self.removeKeys(expiredKeys);
})
.then(function() {
// - deauthorize keys for each personal database of each user
var deauthorize = [];
Object.keys(keysByUser).forEach(function(user) {
deauthorize.push(self.deauthorizeUser(userDocs[user], keysByUser[user]));
});
return BPromise.all(deauthorize);
})
.then(function() {
var userUpdates = [];
Object.keys(userDocs).forEach(function(user) {
userUpdates.push(userDocs[user]);
});
// Bulk save user doc updates
return userDB.bulkDocs(userUpdates);
})
.then(function() {
return BPromise.resolve(expiredKeys);
});
};
this.deauthorizeUser = function(userDoc, keys) {
var self = this;
var promises = [];
// If keys is not specified we will deauthorize all of the users sessions
if(!keys) {
keys = util.getSessions(userDoc);
}
keys = util.toArray(keys);
if(userDoc.personalDBs && typeof userDoc.personalDBs === 'object') {
Object.keys(userDoc.personalDBs).forEach(function(personalDB) {
var db = new PouchDB(util.getDBURL(config.getItem('dbServer')) + '/' + personalDB);
promises.push(self.deauthorizeKeys(db, keys));
});
return BPromise.all(promises);
} else {
return BPromise.resolve(false);
}
};
this.getDesignDoc = function(docName) {
if(!docName) {
return null;
}
var designDoc;
var designDocDir = config.getItem('userDBs.designDocDir');
if(!designDocDir) {
designDocDir = __dirname;
}
try {
designDoc = require(designDocDir + '/' + docName);
}
catch(err) {
console.warn('Design doc: ' + designDocDir + '/' + docName + ' not found.');
designDoc = null;
}
return designDoc;
};
this.getDBConfig = function(dbName, type) {
var dbConfig = {
name: dbName
};
dbConfig.adminRoles = config.getItem('userDBs.defaultSecurityRoles.admins') || [];
dbConfig.memberRoles = config.getItem('userDBs.defaultSecurityRoles.members') || [];
var dbConfigRef = 'userDBs.model.' + dbName;
if(config.getItem(dbConfigRef)) {
dbConfig.permissions = config.getItem(dbConfigRef + '.permissions') || [];
dbConfig.designDocs = config.getItem(dbConfigRef + '.designDocs') || [];
dbConfig.type = type || config.getItem(dbConfigRef + '.type') || 'private';
var dbAdminRoles = config.getItem(dbConfigRef + '.adminRoles');
var dbMemberRoles = config.getItem(dbConfigRef + '.memberRoles');
if(dbAdminRoles && dbAdminRoles instanceof Array) {
dbAdminRoles.forEach(function(role) {
if(role && dbConfig.adminRoles.indexOf(role) === -1) {
dbConfig.adminRoles.push(role);
}
});
}
if(dbMemberRoles && dbMemberRoles instanceof Array) {
dbMemberRoles.forEach(function(role) {
if(role && dbConfig.memberRoles.indexOf(role) === -1) {
dbConfig.memberRoles.push(role);
}
});
}
} else if(config.getItem('userDBs.model._default')) {
dbConfig.permissions = config.getItem('userDBs.model._default.permissions') || [];
// Only add the default design doc to a private database
if(!type || type === 'private') {
dbConfig.designDocs = config.getItem('userDBs.model._default.designDocs') || [];
} else {
dbConfig.designDocs = [];
}
dbConfig.type = type || 'private';
} else {
dbConfig.type = type || 'private';
}
return dbConfig;
};
this.createDB = function (dbName) {
var finalUrl = util.getDBURL(config.getItem('dbServer')) + '/' + dbName;
return BPromise.fromNode(function(callback) {
request.put(finalUrl)
.send({})
.end(callback);
})
.then(function(res) {
return BPromise.resolve(JSON.parse(res.text));
}, function(err) {
if(err.status === 412) {
return BPromise.resolve(false);
} else {
return BPromise.reject(err.text);
}
});
};
this.removeDB = function(dbName) {
var db = new PouchDB(util.getDBURL(config.getItem('dbServer')) + '/' + dbName);
return db.destroy();
};
return this;
};
// Escapes any characters that are illegal in a CouchDB database name using percent codes inside parenthesis
// Example: 'My.name@example.com' => 'my(2e)name(40)example(2e)com'
function getLegalDBName(input) {
input = input.toLowerCase();
var output = encodeURIComponent(input);
output = output.replace(/\./g, '%2E');
output = output.replace(/!/g, '%21');
output = output.replace(/~/g, '%7E');
output = output.replace(/\*/g, '%2A');
output = output.replace(/'/g, '%27');
output = output.replace(/\(/g, '%28');
output = output.replace(/\)/g, '%29');
output = output.replace(/\-/g, '%2D');
output = output.toLowerCase();
output = output.replace(/(%..)/g, function(esc) {
esc = esc.substr(1);
return '(' + esc + ')';
});
return output;
}