Implement iOS progress view #2162

Multiplatform/Shared/Sidebar/RefreshProgressView.swift

@@ -0,0 +1,57 @@
+//
+//  RefreshProgressView.swift
+//  NetNewsWire
+//
+//  Created by Phil Viso on 7/2/20.
+//  Copyright © 2020 Ranchero Software. All rights reserved.
+//
+
+import SwiftUI
+
+struct RefreshProgressView: View {
+	
+	@EnvironmentObject var refreshProgressModel: RefreshProgressModel
+	
+	@ViewBuilder var body: some View {
+		switch refreshProgressModel.state {
+		case .refreshProgress(let progress):
+			ProgressView(value: progress)
+				.frame(width: progressViewWidth())
+		case .lastRefreshDateText(let text):
+			Text(text)
+				.lineLimit(1)
+				.font(.caption)
+				.foregroundColor(.secondary)
+		case .none:
+			EmptyView()
+		}
+	}
+	
+	// MARK -
+	
+	private func progressViewWidth() -> CGFloat {
+		#if os(iOS)
+		return 100.0
+		#endif
+		
+		#if os(macOS)
+		return 40.0
+		#endif
+	}
+	
+}
+
+struct RefreshProgressView_Previews: PreviewProvider {
+	static var previews: some View {
+		Group {
+			RefreshProgressView()
+				.environmentObject(refreshProgressModel(lastRefreshDate: nil, tasksCompleted: 1, totalTasks: 2))
+				.previewDisplayName("Refresh in progress")
+						
+			RefreshProgressView()
+				.environmentObject(refreshProgressModel(lastRefreshDate: Date(timeIntervalSinceNow: -120.0), tasksCompleted: 0, totalTasks: 0))
+				.previewDisplayName("Last refreshed with date")
+		}
+		.previewLayout(.sizeThatFits)
+    }
+}