Stories

submodules/Postbox/Sources/StoryView.swift

@@ -0,0 +1,52 @@
+import Foundation
+
+final class MutableStoryView: MutablePostboxView {
+    let id: StoryId
+    var item: CodableEntry?
+
+    init(postbox: PostboxImpl, id: StoryId) {
+        self.id = id
+        self.item = postbox.storyTable.get(id: self.id)
+    }
+    
+    func replay(postbox: PostboxImpl, transaction: PostboxTransaction) -> Bool {
+        var updated = false
+        
+        for event in transaction.storyEvents {
+            switch event {
+            case .updated(self.id):
+                let item = postbox.storyTable.get(id: self.id)
+                if self.item != item {
+                    self.item = item
+                    updated = true
+                }
+            default:
+                break
+            }
+        }
+        
+        return updated
+    }
+
+    func refreshDueToExternalTransaction(postbox: PostboxImpl) -> Bool {
+        let item = postbox.storyTable.get(id: self.id)
+        if self.item != item {
+            self.item = item
+            return true
+        } else {
+            return false
+        }
+    }
+    
+    func immutableView() -> PostboxView {
+        return StoryView(self)
+    }
+}
+
+public final class StoryView: PostboxView {
+    public let item: CodableEntry?
+    
+    init(_ view: MutableStoryView) {
+        self.item = view.item
+    }
+}