5 // Created by Hori,Masaki on 2017/02/22.
6 // Copyright © 2017年 Hori,Masaki. All rights reserved.
12 struct MappingConfiguration<T: NSManagedObject> {
14 let dataKeys: [String]
15 let primaryKeys: [String]
16 let editorStore: CoreDataAccessor
17 let ignoreKeys: [String]
19 init(entity: Entity<T>,
20 dataKeys: [String] = ["api_data"],
21 primaryKeys: [String] = ["id"],
22 editorStore: CoreDataAccessor,
23 ignoreKeys: [String] = []) {
25 self.dataKeys = dataKeys
26 self.primaryKeys = primaryKeys
27 self.editorStore = editorStore
28 self.ignoreKeys = ignoreKeys
33 associatedtype ObjectType: NSManagedObject
35 init(_ apiResponse: APIResponse)
37 var apiResponse: APIResponse { get }
38 var configuration: MappingConfiguration<ObjectType> { get }
40 func registerElement(_ element: JSON, to object: ObjectType)
42 func beginRegister(_ object: ObjectType)
43 func handleExtraValue(_ value: JSON, forKey key: String, to object: ObjectType) -> Bool
44 func finishOperating()
48 func keyByDeletingPrefix() -> String {
49 if self.characters.count < 5 { return self }
50 let s = self.index(self.startIndex, offsetBy: 4)
51 return self[s..<self.endIndex]
55 extension JSONMapper {
56 var data: JSON { return apiResponse.json[configuration.dataKeys] }
58 private func isEqual(_ lhs: AnyObject?, _ rhs: AnyObject?) -> Bool {
59 if lhs == nil, rhs == nil { return true }
60 if let lhs = lhs, let rhs = rhs { return lhs.isEqual(rhs) }
63 func setValueIfNeeded(_ value: JSON, to object: ObjectType, forKey key: String) {
64 var validValue = value.object as AnyObject?
66 try object.validateValue(&validValue, forKey: key)
71 let old = object.value(forKey: key)
72 if !isEqual(old as AnyObject?, validValue) {
73 object.notifyChangeValue(forKey: key) {
74 object.setValue(validValue, forKey: key)
79 func registerElement(_ element: JSON, to object: ObjectType) {
81 element.forEach { (key, value) in
82 if configuration.ignoreKeys.contains(key) { return }
83 if handleExtraValue(value, forKey: key, to: object) { return }
86 value.array?.enumerated().forEach {
87 let newKey = "\(key)_\($0.offset)"
88 setValueIfNeeded($0.element, to: object, forKey: newKey)
91 value.forEach { (subKey: String, subValue) in
92 let newKey = "\(key)_D_\(subKey.keyByDeletingPrefix())"
93 setValueIfNeeded(subValue, to: object, forKey: newKey)
96 setValueIfNeeded(value, to: object, forKey: key)
100 private var sortDescriptors: [NSSortDescriptor] {
101 return configuration.primaryKeys.map { NSSortDescriptor(key: $0, ascending: true) }
103 private func objectSearch(_ objects: [ObjectType], _ element: JSON) -> ObjectType? {
104 let keyPiar = configuration.primaryKeys.map { (key: $0, apiKey: "api_\($0)") }
105 return objects.binarySearch {
106 for piar in keyPiar {
107 guard let v1 = $0.value(forKey: piar.key)
108 else { return .orderedAscending }
109 if element[piar.apiKey].type == .null { return .orderedDescending }
110 let v2 = element[piar.apiKey].object
111 return (v1 as AnyObject).compare(v2)
113 return .orderedDescending
117 let store = configuration.editorStore
118 guard let objects = try? store.objects(with: configuration.entity, sortDescriptors: sortDescriptors)
119 else { return print("Can not get entity named \(configuration.entity.name)") }
120 let list = (data.type == .array ? data.arrayValue : [data])
122 if let object = objectSearch(objects, $0) {
123 registerElement($0, to: object)
124 } else if let new = store.insertNewObject(for: configuration.entity) {
125 registerElement($0, to: new)
127 fatalError("Can not get entity named \(configuration.entity.name)")
134 func beginRegister(_ object: ObjectType) {}
135 func handleExtraValue(_ value: JSON, forKey key: String, to object: ObjectType) -> Bool {
138 func finishOperating() {}