From c3bd5528fa4d7ff1cefe60593e45c3c48dcec05f Mon Sep 17 00:00:00 2001
From: CMK <cirno.mainasuk@gmail.com>
Date: Fri, 15 Apr 2022 17:34:58 +0800
Subject: [PATCH] feat: add reload to Hashtags tab for Discovery scene

---
 .../DiscoveryHashtagsViewController.swift     | 20 +++++++++++++++++++
 .../Hashtags/DiscoveryHashtagsViewModel.swift | 13 ++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewController.swift b/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewController.swift
index 1dca1232..91ab5036 100644
--- a/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewController.swift
+++ b/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewController.swift
@@ -31,6 +31,8 @@ final class DiscoveryHashtagsViewController: UIViewController, NeedsDependency,
         return tableView
     }()
     
+    let refreshControl = UIRefreshControl()
+    
     deinit {
         os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
     }
@@ -59,6 +61,9 @@ extension DiscoveryHashtagsViewController {
             tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
             tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
         ])
+        
+        tableView.refreshControl = refreshControl
+        refreshControl.addTarget(self, action: #selector(DiscoveryHashtagsViewController.refreshControlValueChanged(_:)), for: .valueChanged)
 
         tableView.delegate = self
         viewModel.setupDiffableDataSource(
@@ -80,6 +85,21 @@ extension DiscoveryHashtagsViewController {
     
 }
 
+extension DiscoveryHashtagsViewController {
+    
+    @objc private func refreshControlValueChanged(_ sender: UIRefreshControl) {
+        Task { @MainActor in
+            do {
+                try await viewModel.fetch()
+            } catch {
+                // do nothing
+            }
+            sender.endRefreshing()
+        }   // end Task
+    }
+    
+}
+
 // MARK: - UITableViewDelegate
 extension DiscoveryHashtagsViewController: UITableViewDelegate {
 
diff --git a/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewModel.swift b/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewModel.swift
index 5f51d645..bb30ec9e 100644
--- a/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewModel.swift
+++ b/Mastodon/Scene/Discovery/Hashtags/DiscoveryHashtagsViewModel.swift
@@ -15,6 +15,8 @@ import MastodonSDK
 
 final class DiscoveryHashtagsViewModel {
     
+    let logger = Logger(subsystem: "DiscoveryHashtagsViewModel", category: "ViewModel")
+    
     var disposeBag = Set<AnyCancellable>()
     
     // input
@@ -61,3 +63,14 @@ final class DiscoveryHashtagsViewModel {
     }
     
 }
+
+extension DiscoveryHashtagsViewModel {
+    
+    @MainActor
+    func fetch() async throws {
+        guard let authenticationBox = context.authenticationService.activeMastodonAuthenticationBox.value else { return }
+        let response = try await context.apiService.trendHashtags(domain: authenticationBox.domain, query: nil)
+        hashtags = response.value.filter { !$0.name.isEmpty }
+        logger.log(level: .debug, "\((#file as NSString).lastPathComponent, privacy: .public)[\(#line, privacy: .public)], \(#function, privacy: .public): fetch tags: \(response.value.count)")
+    }
+}