Add creation/updateTimestampPropertyKey

Fill in a Date on save/create.

Author: helje5

Sources/DirectToSwiftUI/Environment/EnvironmentKeys.swift

@@ -143,6 +143,12 @@ public extension D2SKeys {
   struct initialPropertyValues: DynamicEnvironmentKey {
     public static let defaultValue : [ String : Any? ] = [:]
   }
+  struct creationTimestampPropertyKey: DynamicEnvironmentKey {
+    public static let defaultValue : String? = nil
+  }
+  struct updateTimestampPropertyKey: DynamicEnvironmentKey {
+    public static let defaultValue : String? = nil
+  }
 
   /**
    * The entities which are being displayed on a page.

Sources/DirectToSwiftUI/Environment/EnvironmentPathes.swift

@@ -414,7 +414,16 @@ public extension DynamicEnvironmentPathes {
     set { self[dynamic: D2SKeys.initialPropertyValues.self] = newValue }
     get { self[dynamic: D2SKeys.initialPropertyValues.self] }
   }
-  
+
+  var creationTimestampPropertyKey : String? {
+    set { self[dynamic: D2SKeys.creationTimestampPropertyKey.self] = newValue }
+    get { self[dynamic: D2SKeys.creationTimestampPropertyKey.self] }
+  }
+  var updateTimestampPropertyKey : String? {
+    set { self[dynamic: D2SKeys.updateTimestampPropertyKey.self] = newValue }
+    get { self[dynamic: D2SKeys.updateTimestampPropertyKey.self] }
+  }
+
   /**
    * If you implement a login page, you can assign a value to the `user`
    * environment. And then adjust other environments based on that,

Sources/DirectToSwiftUI/Environment/README.md

@@ -63,6 +63,8 @@ D2S has quiet a set of builtin environment keys, including:
   - `platform`
   - `debug`
   - `initialPropertyValues`
+  - `creationTimestampPropertyKey`
+  - `updateTimestampPropertyKey`
 
 Checkout the `D2SKeys` for the full set.
 

Sources/DirectToSwiftUI/Views/BasicLook/Pages/Edit.swift

@@ -49,8 +49,9 @@ public extension BasicLook.Page {
 
         @EnvironmentObject private var object : OActiveRecord
 
-        @Environment(\.presentationMode) private var presentationMode
-        
+        @Environment(\.presentationMode)           private var presentationMode
+        @Environment(\.updateTimestampPropertyKey) private var updateTS
+
         @State private var lastError      : Swift.Error?
         @State private var isShowingError = false
 
@@ -74,6 +75,10 @@ public extension BasicLook.Page {
           guard hasChanges else { return goBack() }
 
           do {
+            if let pkey = updateTS {
+              try? KeyValueCoding.takeValue(Date(), forKey: pkey,
+                                            inObject: object)
+            }
             try object.save()
             goBack()
           }

Sources/DirectToSwiftUI/Views/BasicLook/Pages/UIKit/MobileQueryList.swift

@@ -54,7 +54,8 @@ public extension BasicLook.Page.UIKit {
       @Environment(\.debugComponent)        private var debugComponent
       @Environment(\.entity)                private var entity
       @Environment(\.initialPropertyValues) private var initialPropertyValues
-      
+      @Environment(\.creationTimestampPropertyKey) private var createTS
+
       private var sortButtons : [ ActionSheet.Button ] {
         // FIXME: limit in size
         // FIXME: use "displayPropertyKeys" or something
@@ -129,6 +130,11 @@ public extension BasicLook.Page.UIKit {
         for ( k, v ) in initialPropertyValues {
           try? KeyValueCoding.takeValue(v, forKeyPath: k, inObject: object)
         }
+        
+        if let pkey = createTS {
+          try? KeyValueCoding.takeValue(Date(), forKey: pkey, inObject: object)
+        }
+        
         return object
       }