add values and total methods to ProgressReporter

Author: chloe-yeo

Sources/FoundationEssentials/ProgressManager/ProgressManager.swift

@@ -297,11 +297,11 @@ internal struct AnyMetatypeWrapper: Hashable, Equatable, Sendable {
         }
     }
 
-    
     /// Returns an array of values for specified property in subtree.
     /// - Parameter metatype: Type of property.
     /// - Returns: Array of values for property.
     public func values<P: Property>(of property: P.Type) -> [P.Value?] {
+        _$observationRegistrar.access(self, keyPath: \.state)
         return state.withLock { state in
             let childrenValues = getFlattenedChildrenValues(property: property, state: &state)
             return [state.otherProperties[AnyMetatypeWrapper(metatype: property)] as? P.Value ?? P.defaultValue] + childrenValues.map { $0 ?? P.defaultValue }

Sources/FoundationEssentials/ProgressManager/ProgressReporter.swift

@@ -55,6 +55,20 @@ import Observation
         return try manager.getAdditionalProperties(closure)
     }
 
+    /// Returns an array of values for specified property in subtree.
+    /// - Parameter metatype: Type of property.
+    /// - Returns: Array of values for property.
+    public func values<P: ProgressManager.Property>(of property: P.Type) -> [P.Value?] {
+        manager.values(of: property)
+    }
+    
+    /// Returns the aggregated result of values.
+    /// - Parameters:
+    ///   - property: Type of property.
+    public func total<P: ProgressManager.Property>(of property: P.Type) -> P.Value where P.Value: AdditiveArithmetic {
+        manager.total(of: property)
+    }
+    
     internal let manager: ProgressManager
 
     internal init(manager: ProgressManager) {

Tests/FoundationEssentialsTests/ProgressManager/ProgressManagerTests.swift

@@ -617,6 +617,12 @@ class TestProgressReporter: XCTestCase {
             properties.totalFileCount = 6
         }
         XCTAssertEqual(reporter.withProperties(\.totalFileCount), 6)
+        
+        let totalFileCount = manager.total(of: ProgressManager.Properties.TotalFileCount.self)
+        XCTAssertEqual(totalFileCount, 6)
+        
+        let totalFileCountValues = manager.values(of: ProgressManager.Properties.TotalFileCount.self)
+        XCTAssertEqual(totalFileCountValues, [6])
     }
 
     func testAddProgressReporterAsChild() {