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Collection of realm operations. Requires ResultsExtension.swift
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import RealmSwift | |
internal struct RealmService { | |
private static var realm: Realm? { | |
do { | |
return try Realm() | |
} catch let error as NSError { | |
print(error) | |
return nil | |
} | |
} | |
// MARK: - Add operations | |
internal static func add<T: Object>(object: T) { | |
guard let realm = realm else { return } | |
do { | |
try realm.write({ | |
realm.add(object) | |
}) | |
} catch { | |
showError() | |
} | |
} | |
internal static func add<T: Object>(array: [T]) { | |
guard let realm = realm else { return } | |
do { | |
try realm.write({ | |
realm.add(array) | |
}) | |
} catch { | |
showError() | |
} | |
} | |
// MARK: - Get operations | |
internal static func get<T: Object>(objectsOfInstanceType instanceType: T.Type, withPredicate predicate: NSPredicate? = nil) -> Results<T>? { | |
guard let realm = realm else { return nil } | |
var objects = realm.objects(instanceType) | |
if let predicate = predicate { | |
objects = objects.filter(predicate) | |
} | |
guard !objects.isEmpty else { return nil } | |
return objects | |
} | |
internal static func get<T: Object>(arrayOfInstanceType instanceType: T.Type, withPredicate predicate: NSPredicate? = nil) -> [T]? { | |
guard let objects = get(objectsOfInstanceType: instanceType, withPredicate: predicate) else { return nil } | |
return objects.toArray() | |
} | |
// MARK: - Remove operations | |
internal static func remove<T: Object>(object: T) { | |
guard let realm = realm else { return } | |
realm.beginWrite() | |
realm.delete(object) | |
commitWrite(inRealm: realm) | |
} | |
internal static func remove<T: Object>(objectsOfInstanceType instanceType: T.Type) { | |
guard let realm = realm else { return } | |
let objects = realm.objects(instanceType) | |
realm.beginWrite() | |
realm.delete(objects) | |
commitWrite(inRealm: realm) | |
} | |
// MARK: - Operations | |
internal static func areObjectsAvailable<T: Object>(ofInstanceType instanceType: T.Type, withPredicate predicate: NSPredicate) -> Bool { | |
guard let _ = get(objectsOfInstanceType: instanceType, withPredicate: predicate) else { return false } | |
return true | |
} | |
// MARK: - Helpers | |
private static func commitWrite(inRealm realm: Realm) { | |
do { | |
try realm.commitWrite() | |
} catch { | |
showError() | |
} | |
} | |
private static func showError() { | |
print("Realm Error") | |
} | |
} |
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