dao-factory-manager.js
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var Toposort = require('toposort-class')
, DaoFactory = require('./dao-factory')
, _ = require('lodash')
module.exports = (function() {
var DAOFactoryManager = function(sequelize) {
this.daos = []
this.sequelize = sequelize
}
DAOFactoryManager.prototype.addDAO = function(dao) {
this.daos.push(dao)
return dao
}
DAOFactoryManager.prototype.removeDAO = function(dao) {
this.daos = this.daos.filter(function(_dao) {
return _dao.name != dao.name
})
}
DAOFactoryManager.prototype.getDAO = function(daoName, options) {
options = options || {}
options.attribute = options.attribute || 'name'
var dao = this.daos.filter(function(dao) {
return dao[options.attribute] === daoName
})
return !!dao ? dao[0] : null
}
DAOFactoryManager.prototype.__defineGetter__('all', function() {
return this.daos
})
/**
* Iterate over DAOs in an order suitable for e.g. creating tables. Will
* take foreign key constraints into account so that dependencies are visited
* before dependents.
*/
DAOFactoryManager.prototype.forEachDAO = function(iterator, options) {
var daos = {}
, sorter = new Toposort()
, sorted
, dep
options = _.defaults(options || {}, {
reverse: true
})
this.daos.forEach(function(dao) {
var deps = []
daos[dao.tableName] = dao
for (var attrName in dao.rawAttributes) {
if (dao.rawAttributes.hasOwnProperty(attrName)) {
if (dao.rawAttributes[attrName].references) {
dep = dao.rawAttributes[attrName].references
dep = dep.tableName || dep
deps.push(dep)
}
}
}
deps = deps.filter(function (dep) {
return dao.tableName !== dep
})
sorter.add(dao.tableName, deps)
})
sorted = sorter.sort()
if (options.reverse) {
sorted = sorted.reverse()
}
sorted.forEach(function(name) {
iterator(daos[name], name)
})
}
return DAOFactoryManager
})()