Merge pull request #7 from KaiTheRedNinja/main

Add IfQueryable, for conditionally showing a view

Author: SwiftedMind

Sources/Queryable/Handlers/Queryable+Conditional.swift

@@ -0,0 +1,40 @@
+//
+//  IfQueryable.swift
+//
+//
+//  Created by Kai Quan Tay on 12/1/24.
+//
+
+import SwiftUI
+
+public struct WithQuery<Item, Result, QueryContent: View>: View {
+    @ObservedObject private var queryable: Queryable<Item, Result>
+    private var queryContent: (_ item: Item, _ query: QueryResolver<Result>) -> QueryContent
+
+    public init(
+        _ queryable: Queryable<Item, Result>,
+        @ViewBuilder queryContent: @escaping (_ item: Item, _ query: QueryResolver<Result>) -> QueryContent
+    ) {
+        self.queryable = queryable
+        self.queryContent = queryContent
+    }
+
+    public init(
+        _ queryable: Queryable<Void, Result>,
+        @ViewBuilder queryContent: @escaping (_ query: QueryResolver<Result>) -> QueryContent
+    ) where Item == Void {
+        self.queryable = queryable
+        self.queryContent = { _, query in queryContent(query) }
+    }
+
+    public var body: some View {
+        if let initialItemContainer = queryable.itemContainer {
+            StableItemContainerView(itemContainer: initialItemContainer) { itemContainer in
+                queryContent(itemContainer.item, initialItemContainer.resolver)
+                    .onDisappear {
+                        queryable.autoCancelContinuation(id: itemContainer.id, reason: .presentationEnded)
+                    }
+            }
+        }
+    }
+}