Core Data Playground (WIP)

CoreData Playground Patch

diff --git a/Playgrounds/PricingAPIModels.playground/Contents.swift b/Playgrounds/PricingAPIModels.playground/Contents.swift
index f0c121a..2ada632 100644
--- a/Playgrounds/PricingAPIModels.playground/Contents.swift
+++ b/Playgrounds/PricingAPIModels.playground/Contents.swift
@@ -1,42 +1,50 @@
 //: Playground - noun: a place where people can play
 
 import UIKit
+import CoreData
 import PPNetworking
+import FeatureKit
 
-struct PPFeature: PPNetworkingMappableObject {
-    let name: String
-    let coins: Int
-    let count: Int
-    
-    func JSONMapping() -> [AnyObject!: AnyObject] {
-        return [
-            "name": "name",
-            "coins": "coins",
-            "count": "count"
-        ]
-    }
-}
 
-struct PPPricedFeatures {
-    let features: [PPFeature]
-    
-    // TODO: Implementation of adding multiple features
+
+let PPFeatureUpcomingEventsReceiver = PPFeature()
+
+func PPFeatureIsEnabled(feature: PPFeature) -> Bool {
+    return true
 }
 
-class PPCardPricing: PPNetworkingMappableObject {
-    let coins: Int
-    let coinsPer: Int
-    let features: [PPPricedFeature]
+class PostboxRecordPredicates {
     
-    func JSONMapping() -> [AnyObject!: AnyObject] {
-        return [
-            "coins": "coins",
-            "coins_per": "coinsPer",
-            "features": "features"
-        ]
+    class func upcomingEventsSentAndReceived() -> NSPredicate {
+        
+        return NSPredicate(format: "%K == %@", "isSentRecord", true as CVarArg)
     }
     
-    func JSONMappingRleationships() -> [AnyObject] {
-        PPNetworkingRelationship
+    class func upcomingSentRSVPEvents() -> NSPredicate {
+        
+        return upcomingEventsSentAndReceived() // DONT DO THIS, THIS IS HERE JUST TO SATISFY THE COMPILER
     }
 }
+
+class PostboxRecordFetch {
+    
+    class func fetchRequestForUpcomingEvents(limit: Int? = nil) -> NSFetchRequest<PPostboxRecord> {
+        
+        let sortDescriptor = NSSortDescriptor(key: "eventDetails.eventTimeDate", ascending: true)
+        
+        let fetchRequest: NSFetchRequest<NSFetchRequestResult> = PPostboxRecord.fetchRequest()
+        
+        if PPFeatureIsEnabled(PPFeatureUpcomingEventsReceiver) {
+            fetchRequest.predicate = PostboxRecordPredicates.upcomingEventsSentAndReceived()
+        } else {
+            fetchRequest.predicate = PostboxRecordPredicates.upcomingSentRSVPEvents()
+        }
+        
+        fetchRequest.fetchLimit = limit ?? 0
+        fetchRequest.sortDescriptors = [sortDescriptor]
+        
+        return fetchRequest as! NSFetchRequest<PPostboxRecord>
+    }
+}
+
+
diff --git a/Playgrounds/PricingAPIModels.playground/Sources/SupportCode.swift b/Playgrounds/PricingAPIModels.playground/Sources/SupportCode.swift
index 767f79e..402f439 100644
--- a/Playgrounds/PricingAPIModels.playground/Sources/SupportCode.swift
+++ b/Playgrounds/PricingAPIModels.playground/Sources/SupportCode.swift
@@ -1,3 +1,82 @@
 //
 // This file (and all other Swift source files in the Sources directory of this playground) will be precompiled into a framework which is automatically made available to PricingAPIModels.playground.
 //
+
+import CoreData
+
+public class PPEventDetails: NSManagedObject {
+    @NSManaged public var id: NSNumber
+    
+}
+
+public class PPostboxRecord: NSManagedObject {
+    
+    @NSManaged public var id: NSNumber
+    @NSManaged public var isSentRecord: Bool
+    @NSManaged public var eventDetails: PPEventDetails
+}
+
+
+public class CoreDataStack {
+    // 2
+    public let model:NSManagedObjectModel
+    public let persistentStoreCoordinator:NSPersistentStoreCoordinator
+    public let context:NSManagedObjectContext
+    
+    public init() {
+        
+        // 3
+        // initialize our postbox record entity
+        let commentEntity = NSEntityDescription()
+        commentEntity.name = "PPostboxRecord"
+        commentEntity.managedObjectClassName = NSStringFromClass(PPostboxRecord.self)
+        
+        // create the attributes for the entity
+        let idAttribute = NSAttributeDescription()
+        idAttribute.name = "id"
+        idAttribute.attributeType = .integer64AttributeType
+        idAttribute.isOptional = false
+        idAttribute.isIndexed = true
+        
+        let commentAttribute = NSAttributeDescription()
+        commentAttribute.name = "isSentRecord"
+        commentAttribute.attributeType = .integer64AttributeType
+        commentAttribute.isOptional = false
+        commentAttribute.isIndexed = false
+        
+        // add the properties to the entity
+        commentEntity.properties = [idAttribute, commentAttribute]
+        
+        // add the entities to the model
+        model = NSManagedObjectModel()
+        model.entities = [commentEntity]
+        // 4
+        // setup the persistent store coordinator
+        persistentStoreCoordinator = NSPersistentStoreCoordinator(managedObjectModel: model)
+        do {
+            try persistentStoreCoordinator.addPersistentStore(ofType: NSInMemoryStoreType, configurationName: nil, at: nil, options: nil)
+        }
+        catch {
+            print("error creating persistentstorecoordinator: \(error)")
+        }
+        // 5
+        // set up managed object context
+        context = NSManagedObjectContext(concurrencyType: .mainQueueConcurrencyType)
+        context.persistentStoreCoordinator = persistentStoreCoordinator
+        
+        
+    }
+    // 6
+    public func saveContext () {
+        if context.hasChanges {
+            do {
+                try context.save()
+            } catch {
+                let nserror = error as NSError
+                NSLog("Unresolved error \(nserror), \(nserror.userInfo)")
+                abort()
+            }
+        }
+    }
+    
+}
diff --git a/Playgrounds/PricingAPIModels.playground/timeline.xctimeline b/Playgrounds/PricingAPIModels.playground/timeline.xctimeline
deleted file mode 100644
index bf468af..0000000
--- a/Playgrounds/PricingAPIModels.playground/timeline.xctimeline
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Timeline
-   version = "3.0">
-   <TimelineItems>
-   </TimelineItems>
-</Timeline>