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CoreDataManager.swift
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CoreDataManager.swift
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//
// CoreDataManager.swift
// appgenerica
//
import Foundation
import CoreData
class CoreDataManager{
/**
* Select de datos
* Se retorna array de los objetos encontrados en la busqueda
*/
static func listaDe<T: NSManagedObject>(entity: T.Type,
multiPredicate: [NSPredicate]? = nil,
sortDescriptor: [NSSortDescriptor]? = nil,
context: NSManagedObjectContext = CoreDataStack.managedObjectContext) -> NSMutableArray? {
let fetchRequest = NSFetchRequest<T>(entityName: NSStringFromClass(T.self))
var predicates = [NSPredicate]()
if(multiPredicate != nil){
for predic in multiPredicate!{
predicates.append(predic)
}
fetchRequest.predicate = NSCompoundPredicate(andPredicateWithSubpredicates: predicates)
}
if sortDescriptor != nil {
fetchRequest.sortDescriptors = sortDescriptor!
}
fetchRequest.returnsObjectsAsFaults = false
do {
let searchResult = try context.fetch(fetchRequest)
if searchResult.count > 0 {
// returns mutable copy of result array
return NSMutableArray.init(array: searchResult)
} else {
// returns nil in case no object found
return nil
}
} catch {
print(error.localizedDescription)
return nil
}
}
/**
* Borrado de datos
* Se borran los objetos encontrados en la busqueda
*/
static func borrarObjetos<T: NSManagedObject>(entity: T.Type,
multiPredicate: [NSPredicate]? = nil,
sortDescriptor: [NSSortDescriptor]? = nil,
context: NSManagedObjectContext = CoreDataStack.managedObjectContext) -> Bool? {
var response = false
let fetchRequest = NSFetchRequest<T>(entityName: NSStringFromClass(T.self))
var predicates = [NSPredicate]()
if(multiPredicate != nil){
for predic in multiPredicate!{
predicates.append(predic)
}
fetchRequest.predicate = NSCompoundPredicate(andPredicateWithSubpredicates: predicates)
}
if sortDescriptor != nil {
fetchRequest.sortDescriptors = sortDescriptor!
}
fetchRequest.returnsObjectsAsFaults = false
do {
let searchResult = try context.fetch(fetchRequest)
if searchResult.count > 0 {
// returns mutable copy of result array
for object in searchResult {
context.delete(object)
}
response = true
}
do {
try context.save() // <- remember to put this :)
} catch {
return nil
}
return response
} catch {
print(error.localizedDescription)
return nil
}
}
/**
* SortDecriptor
* Sorting list
*/
static func OrdenarPor(campos: [String], ascendente: Bool) -> [NSSortDescriptor]{
var sorts = [NSSortDescriptor]()
if(campos.count > 0){
for campo in campos {
sorts.append(NSSortDescriptor(key: campo, ascending: ascendente))
}
}
return sorts
}
/**
* Predicados
* Lista de funciones para utilizar como predicados
*/
static func Donde(campo: String, contiene texto: String, caseSensitive: Bool) ->NSPredicate{
if caseSensitive {
return NSPredicate(format: "%K CONTAINS %@", campo, texto)
}else{
return NSPredicate(format: "%K CONTAINS[c] %@", campo, texto)
}
}
static func Donde(campo: String, es esto: String) ->NSPredicate{
return NSPredicate(format: "%K == %@", campo, esto)
}
static func Ignorar(en campo: String, esto: String) ->NSPredicate{
return NSPredicate(format: "NOT %K BEGINSWITH %@", campo, esto)
}
static func DoceHorasAtras() ->NSPredicate{
//El intervalo de tiempo se realiza en segundos
let twelveHoursAgo = Date().addingTimeInterval(-43200)
return NSPredicate(format: "date > %@", twelveHoursAgo as NSDate)
}
static func DesdeHasta(campoFecha: String, desde: Date, hasta: Date) ->NSPredicate{
return NSPredicate(
format: "%K > %@ AND %K < %@",
campoFecha, desde as NSDate,
campoFecha, hasta as NSDate
)
}
static func EmpiezaCon(campo: String, texto: String) ->NSPredicate{
return NSPredicate(format: "%K BEGINSWITH %@", campo, texto)
}
static func TerminaCon(campo: String, texto: String) ->NSPredicate{
return NSPredicate(format: "%K ENDSWITH %@", campo, texto)
}
static func CoincidenciaDe(campo: String, con regExp: String) ->NSPredicate{
return NSPredicate(format: "%K MATCHES %@", campo, regExp)
}
// static func adsad() -> NSPredicate{
// return NSPredicate(format: "name contains[c] %@ AND nickName contains[c] %@", argumentArray: [name, nickname])
// return NSPredicate(format: "name = %@ AND nickName = %@", argumentArray: [name, nickname])
// }
}
//USAGE
// Add Sort Descriptor
let sortDescriptor = NSSortDescriptor(key: "name", ascending: true)
// Add Predicate
var predicates = [NSPredicate]()
predicates.append(NSPredicate(format: "name = someName"))
predicates.append(NSPredicate(format: "%K = %@", "list.name", "Home"))
let datos = CoreDataManager.listaDe(entity: Usuario.self, multiPredicate: predicates, sortDescriptor: [sortDescriptor])
for dato in datos as! [NSManagedObject] {
print(dato.value(forKey: "property") ?? "FETCH GENERICO SINDATOS")
}