:saprkles: Adding CoreData Helper Classes

- Also adding lecturer entity and relationship between event and lecturers.
- Preparation for CoreData refactoring

DHBW-Service/CoreData/DHBW_Service.xcdatamodeld/DHBW_Service.xcdatamodel/contents

@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="17709" systemVersion="20D62" minimumToolsVersion="Automatic" sourceLanguage="Swift" usedWithCloudKit="YES" userDefinedModelVersionIdentifier="">
-    <entity name="RaPlaEvent" representedClassName="RaPlaEvent" syncable="YES" codeGenerationType="class">
+    <entity name="Lecturer" representedClassName="Lecturer" syncable="YES">
+        <attribute name="email" optional="YES" attributeType="String"/>
+        <attribute name="name" optional="YES" attributeType="String"/>
+        <relationship name="event" optional="YES" maxCount="1" deletionRule="Nullify" destinationEntity="RaPlaEvent" inverseName="lecturers" inverseEntity="RaPlaEvent"/>
+    </entity>
+    <entity name="RaPlaEvent" representedClassName="RaPlaEvent" syncable="YES">
         <attribute name="category" optional="YES" attributeType="String"/>
         <attribute name="descr" optional="YES" attributeType="String"/>
         <attribute name="endDate" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
@@ -9,14 +14,16 @@
         <attribute name="startDate" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
         <attribute name="summary" optional="YES" attributeType="String"/>
         <attribute name="uid" optional="YES" attributeType="String"/>
+        <relationship name="lecturers" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="Lecturer" inverseName="event" inverseEntity="Lecturer"/>
     </entity>
-    <entity name="User" representedClassName="User" syncable="YES" codeGenerationType="class">
+    <entity name="User" representedClassName="User" syncable="YES">
         <attribute name="course" optional="YES" attributeType="String"/>
         <attribute name="director" optional="YES" attributeType="String"/>
         <attribute name="name" optional="YES" attributeType="String"/>
     </entity>
     <elements>
-        <element name="RaPlaEvent" positionX="-63" positionY="9" width="128" height="149"/>
-        <element name="User" positionX="-63" positionY="-9" width="128" height="74"/>
+        <element name="Lecturer" positionX="-351" positionY="99" width="128" height="74"/>
+        <element name="RaPlaEvent" positionX="-271.3642578125" positionY="83.64776611328125" width="128" height="164"/>
+        <element name="User" positionX="-428.6358032226562" positionY="2.067169189453125" width="128" height="74"/>
     </elements>
 </model>

DHBW-Service/CoreData/Models/Lecturer+CoreDataClass.swift

@@ -0,0 +1,25 @@
+//
+//  Lecturer+CoreDataClass.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 10.02.21.
+//
+//
+
+import Foundation
+import CoreData
+
+@objc(Lecturer)
+public class Lecturer: NSManagedObject {
+    @nonobjc public class func getAll() -> [Lecturer] {
+        let managedContext =
+            PersistenceController.shared.context
+        
+        do {
+            return try managedContext.fetch(Lecturer.fetchRequest())
+        } catch let error as NSError {
+            print("Could not fetch. \(error), \(error.userInfo)")
+            return []
+        }
+    }
+}

DHBW-Service/CoreData/Models/Lecturer+CoreDataProperties.swift

@@ -0,0 +1,27 @@
+//
+//  Lecturer+CoreDataProperties.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 10.02.21.
+//
+//
+
+import Foundation
+import CoreData
+
+
+extension Lecturer {
+
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<Lecturer> {
+        return NSFetchRequest<Lecturer>(entityName: "Lecturer")
+    }
+
+    @NSManaged public var email: String?
+    @NSManaged public var name: String?
+    @NSManaged public var event: RaPlaEvent?
+
+}
+
+extension Lecturer : Identifiable {
+
+}

DHBW-Service/CoreData/Models/RaPlaEvent+CoreDataClass.swift

@@ -0,0 +1,25 @@
+//
+//  RaPlaEvent+CoreDataClass.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 10.02.21.
+//
+//
+
+import Foundation
+import CoreData
+
+@objc(RaPlaEvent)
+public class RaPlaEvent: NSManagedObject {
+    @nonobjc public class func getAll() -> [RaPlaEvent] {
+        let managedContext =
+            PersistenceController.shared.context
+        
+        do {
+            return try managedContext.fetch(RaPlaEvent.fetchRequest())
+        } catch let error as NSError {
+            print("Could not fetch. \(error), \(error.userInfo)")
+            return []
+        }
+    }
+}

DHBW-Service/CoreData/Models/RaPlaEvent+CoreDataProperties.swift

@@ -0,0 +1,50 @@
+//
+//  RaPlaEvent+CoreDataProperties.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 10.02.21.
+//
+//
+
+import Foundation
+import CoreData
+
+
+extension RaPlaEvent {
+
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<RaPlaEvent> {
+        return NSFetchRequest<RaPlaEvent>(entityName: "RaPlaEvent")
+    }
+
+    @NSManaged public var category: String?
+    @NSManaged public var descr: String?
+    @NSManaged public var endDate: Date?
+    @NSManaged public var isHidden: Bool
+    @NSManaged public var location: String?
+    @NSManaged public var startDate: Date?
+    @NSManaged public var summary: String?
+    @NSManaged public var uid: String?
+    @NSManaged public var lecturers: NSSet?
+
+}
+
+// MARK: Generated accessors for lecturers
+extension RaPlaEvent {
+
+    @objc(addLecturersObject:)
+    @NSManaged public func addToLecturers(_ value: Lecturer)
+
+    @objc(removeLecturersObject:)
+    @NSManaged public func removeFromLecturers(_ value: Lecturer)
+
+    @objc(addLecturers:)
+    @NSManaged public func addToLecturers(_ values: NSSet)
+
+    @objc(removeLecturers:)
+    @NSManaged public func removeFromLecturers(_ values: NSSet)
+
+}
+
+extension RaPlaEvent : Identifiable {
+
+}

DHBW-Service/CoreData/Models/User+CoreDataClass.swift

@@ -0,0 +1,25 @@
+//
+//  User+CoreDataClass.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 10.02.21.
+//
+//
+
+import Foundation
+import CoreData
+
+@objc(User)
+public class User: NSManagedObject {
+    @nonobjc public class func getAll() -> [User] {
+        let managedContext =
+            PersistenceController.shared.context
+        
+        do {
+            return try managedContext.fetch(User.fetchRequest())
+        } catch let error as NSError {
+            print("Could not fetch. \(error), \(error.userInfo)")
+            return []
+        }
+    }
+}

DHBW-Service/CoreData/Models/User+CoreDataProperties.swift

@@ -0,0 +1,27 @@
+//
+//  User+CoreDataProperties.swift
+//  DHBW-Service
+//
+//  Created by Patrick Müller on 10.02.21.
+//
+//
+
+import Foundation
+import CoreData
+
+
+extension User {
+
+    @nonobjc public class func fetchRequest() -> NSFetchRequest<User> {
+        return NSFetchRequest<User>(entityName: "User")
+    }
+
+    @NSManaged public var course: String?
+    @NSManaged public var director: String?
+    @NSManaged public var name: String?
+
+}
+
+extension User : Identifiable {
+
+}