From 24139e932bbcc2e1c15fc4eb68bfb0cfd8b2073f Mon Sep 17 00:00:00 2001
From: Bob Sun <bob@mssun.me>
Date: Fri, 10 Feb 2017 15:43:48 +0800
Subject: [PATCH] async calculating about repository page

---
 .../AboutRepositoryTableViewController.swift  | 52 +++++++++++++------
 1 file changed, 36 insertions(+), 16 deletions(-)

diff --git a/pass/Controllers/AboutRepositoryTableViewController.swift b/pass/Controllers/AboutRepositoryTableViewController.swift
index 7c3d6f9..3f775dd 100644
--- a/pass/Controllers/AboutRepositoryTableViewController.swift
+++ b/pass/Controllers/AboutRepositoryTableViewController.swift
@@ -13,23 +13,43 @@ class AboutRepositoryTableViewController: BasicStaticTableViewController {
     override func viewDidLoad() {
         navigationItemTitle = "About Repository"
         super.viewDidLoad()
-        let passwordEntities = PasswordStore.shared.fetchPasswordEntityCoreData()
-        let fm = FileManager.default
-        var size = UInt64(0)
-        do {
-            size = try fm.allocatedSizeOfDirectoryAtURL(directoryURL: PasswordStore.shared.storeURL)
-        } catch {
-            print(error)
+        let indicatorLable = UILabel(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: 21))
+        indicatorLable.center = CGPoint(x: view.frame.size.width / 2, y: view.frame.size.height * 0.382 + 22)
+        indicatorLable.backgroundColor = UIColor.clear
+        indicatorLable.textColor = UIColor.gray
+        indicatorLable.text = "calculating"
+        indicatorLable.textAlignment = .center
+        indicatorLable.font = UIFont.preferredFont(forTextStyle: .footnote)
+        let indicator = UIActivityIndicatorView(activityIndicatorStyle: .gray)
+        indicator.center = CGPoint(x: view.frame.size.width / 2, y: view.frame.size.height * 0.382)
+        indicator.startAnimating()
+        tableView.addSubview(indicator)
+        tableView.addSubview(indicatorLable)
+        
+        DispatchQueue.global(qos: .userInitiated).async {
+            let passwordEntities = PasswordStore.shared.fetchPasswordEntityCoreData()
+            let fm = FileManager.default
+            var size = UInt64(0)
+            do {
+                size = try fm.allocatedSizeOfDirectoryAtURL(directoryURL: PasswordStore.shared.storeURL)
+            } catch {
+                print(error)
+            }
+
+            DispatchQueue.main.async { [weak self] in
+                let formatted = ByteCountFormatter.string(fromByteCount: Int64(size), countStyle: ByteCountFormatter.CountStyle.file)
+                self?.tableData = [
+                    // section 0
+                    [[.type: CellDataType.detail, .title: "Passwords", .detailText: String(passwordEntities.count)],
+                     [.type: CellDataType.detail, .title: "Size", .detailText: formatted],
+                     [.type: CellDataType.detail, .title: "Last Synced", .detailText: Utils.getLastUpdatedTimeString()],
+                     ],
+                ]
+                indicator.stopAnimating()
+                indicatorLable.isHidden = true
+                self?.tableView.reloadData()
+            }
         }
-        let formatted = ByteCountFormatter.string(fromByteCount: Int64(size), countStyle: ByteCountFormatter.CountStyle.file)
-        tableData = [
-            // section 0
-            [[.type: CellDataType.detail, .title: "Passwords", .detailText: String(passwordEntities.count)],
-             [.type: CellDataType.detail, .title: "Size", .detailText: formatted],
-             [.type: CellDataType.detail, .title: "Last Synced", .detailText: Utils.getLastUpdatedTimeString()],
-             ],
-        ]
-        tableView.reloadData()
     }
 
 }