Add buttons to Explore screen

Tusker.xcodeproj/project.pbxproj

@@ -200,6 +200,7 @@
 		D681E4D7246E32290053414F /* StatusActivityItemSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = D681E4D6246E32290053414F /* StatusActivityItemSource.swift */; };
 		D681E4D9246E346E0053414F /* AccountActivityItemSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = D681E4D8246E346E0053414F /* AccountActivityItemSource.swift */; };
 		D68232F72464F4FD00325FB8 /* ComposeDrawingViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68232F62464F4FD00325FB8 /* ComposeDrawingViewController.swift */; };
+		D68329EF299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D68329EE299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift */; };
 		D686BBE324FBF8110068E6AA /* WrappedProgressView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D686BBE224FBF8110068E6AA /* WrappedProgressView.swift */; };
 		D6895DC228D65274006341DA /* CustomAlertController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6895DC128D65274006341DA /* CustomAlertController.swift */; };
 		D6895DC428D65342006341DA /* ConfirmReblogStatusPreviewView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6895DC328D65342006341DA /* ConfirmReblogStatusPreviewView.swift */; };
@@ -612,6 +613,7 @@
 		D681E4D6246E32290053414F /* StatusActivityItemSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StatusActivityItemSource.swift; sourceTree = "<group>"; };
 		D681E4D8246E346E0053414F /* AccountActivityItemSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AccountActivityItemSource.swift; sourceTree = "<group>"; };
 		D68232F62464F4FD00325FB8 /* ComposeDrawingViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ComposeDrawingViewController.swift; sourceTree = "<group>"; };
+		D68329EE299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MoreTrendsFooterCollectionViewCell.swift; sourceTree = "<group>"; };
 		D686BBE224FBF8110068E6AA /* WrappedProgressView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WrappedProgressView.swift; sourceTree = "<group>"; };
 		D6895DC128D65274006341DA /* CustomAlertController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CustomAlertController.swift; sourceTree = "<group>"; };
 		D6895DC328D65342006341DA /* ConfirmReblogStatusPreviewView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConfirmReblogStatusPreviewView.swift; sourceTree = "<group>"; };
@@ -945,6 +947,7 @@
 				D693A72D25CF91C6003A14E2 /* FeaturedProfileCollectionViewCell.swift */,
 				D693A72E25CF91C6003A14E2 /* FeaturedProfileCollectionViewCell.xib */,
 				D6C3F4FA299035650009FCFF /* TrendsViewController.swift */,
+				D68329EE299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift */,
 			);
 			path = Explore;
 			sourceTree = "<group>";
@@ -2072,6 +2075,7 @@
 				D6A00B1D26379FC900316AD4 /* PollOptionsView.swift in Sources */,
 				D6DF95C12533F5DE0027A9B6 /* RelationshipMO.swift in Sources */,
 				D6ADB6EE28EA74E8009924AB /* UIView+Configure.swift in Sources */,
+				D68329EF299540050026EB24 /* MoreTrendsFooterCollectionViewCell.swift in Sources */,
 				D623A5412635FB3C0095BD04 /* PollOptionView.swift in Sources */,
 				D61F75B1293BD85300C0B37F /* CreateFilterService.swift in Sources */,
 				D65C6BF525478A9C00A6E89C /* BackgroundableViewController.swift in Sources */,

Tusker/Screens/Explore/MoreTrendsFooterCollectionViewCell.swift

@@ -0,0 +1,84 @@
+//
+//  MoreTrendsFooterCollectionViewCell.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 2/9/23.
+//  Copyright © 2023 Shadowfacts. All rights reserved.
+//
+
+import UIKit
+
+class MoreTrendsFooterCollectionViewCell: UICollectionViewCell {
+    
+    weak var delegate: TuskerNavigationDelegate?
+    
+    private var button = UIButton()
+    
+    private var kind: Kind!
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        
+        button.addTarget(self, action: #selector(buttonPressed), for: .touchUpInside)
+        button.translatesAutoresizingMaskIntoConstraints = false
+        contentView.addSubview(button)
+        NSLayoutConstraint.activate([
+            button.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),
+            button.topAnchor.constraint(equalTo: contentView.topAnchor),
+            button.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),
+        ])
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    func updateUI(_ kind: Kind) {
+        guard self.kind != kind else {
+            return
+        }
+        self.kind = kind
+        
+        var config = UIButton.Configuration.plain()
+        var title: AttributedString
+        switch kind {
+        case .hashtags:
+            title = "More Trending Hashtags"
+        case .links:
+            title = "More Trending Links"
+        case .profileSuggestions:
+            title = "More Suggested Accounts"
+        }
+        title.font = .preferredFont(forTextStyle: .body).withTraits(.traitBold)!
+        config.attributedTitle = title
+        config.image = UIImage(systemName: "chevron.right")
+        config.imagePlacement = .trailing
+        config.buttonSize = .mini
+        button.configuration = config
+    }
+    
+    @objc private func buttonPressed() {
+        guard let delegate else {
+            return
+        }
+        switch kind {
+        case nil:
+            return
+        case .hashtags:
+            delegate.show(TrendingHashtagsViewController(mastodonController: delegate.apiController))
+        case .links:
+            delegate.show(TrendingLinksViewController(mastodonController: delegate.apiController))
+        case .profileSuggestions:
+            delegate.show(ProfileDirectoryViewController(mastodonController: delegate.apiController))
+        }
+    }
+    
+}
+
+extension MoreTrendsFooterCollectionViewCell {
+    enum Kind {
+        case hashtags
+        case links
+        case profileSuggestions
+    }
+}

Tusker/Screens/Explore/TrendsViewController.swift

@@ -45,6 +45,7 @@ class TrendsViewController: UIViewController, CollectionViewController {
             case .trendingHashtags:
                 var listConfig = UICollectionLayoutListConfiguration(appearance: .grouped)
                 listConfig.headerMode = .supplementary
+                listConfig.footerMode = .supplementary
                 listConfig.backgroundColor = .appGroupedBackground
                 return .list(using: listConfig, layoutEnvironment: environment)
                 
@@ -57,9 +58,10 @@ class TrendsViewController: UIViewController, CollectionViewController {
                 let section = NSCollectionLayoutSection(group: group)
                 section.orthogonalScrollingBehavior = .groupPaging
                 section.boundarySupplementaryItems = [
-                    NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .estimated(12)), elementKind: UICollectionView.elementKindSectionHeader, alignment: .topLeading)
+                    NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .estimated(12)), elementKind: UICollectionView.elementKindSectionHeader, alignment: .topLeading),
+                    NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .estimated(30)), elementKind: UICollectionView.elementKindSectionFooter, alignment: .bottomLeading),
                 ]
-                section.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 0, bottom: 16, trailing: 0)
+                section.contentInsets = .zero
                 return section
 
             case .profileSuggestions:
@@ -71,9 +73,10 @@ class TrendsViewController: UIViewController, CollectionViewController {
                 let section = NSCollectionLayoutSection(group: group)
                 section.orthogonalScrollingBehavior = .groupPaging
                 section.boundarySupplementaryItems = [
-                    NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .estimated(12)), elementKind: UICollectionView.elementKindSectionHeader, alignment: .topLeading)
+                    NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .estimated(12)), elementKind: UICollectionView.elementKindSectionHeader, alignment: .topLeading),
+                    NSCollectionLayoutBoundarySupplementaryItem(layoutSize: NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .estimated(30)), elementKind: UICollectionView.elementKindSectionFooter, alignment: .bottomLeading),
                 ]
-                section.contentInsets = NSDirectionalEdgeInsets(top: 0, leading: 0, bottom: 16, trailing: 0)
+                section.contentInsets = .zero
                 return section
                 
             case .trendingStatuses:
@@ -119,6 +122,19 @@ class TrendsViewController: UIViewController, CollectionViewController {
             cell.delegate = self
             cell.updateUI(accountID: item.0, source: item.1)
         }
+        let moreCell = UICollectionView.SupplementaryRegistration<MoreTrendsFooterCollectionViewCell>(elementKind: UICollectionView.elementKindSectionFooter) { [unowned self] supplementaryView, elementKind, indexPath in
+            supplementaryView.delegate = self
+            switch self.dataSource.sectionIdentifier(for: indexPath.section) {
+            case nil, .trendingStatuses:
+                fatalError()
+            case .trendingHashtags:
+                supplementaryView.updateUI(.hashtags)
+            case .trendingLinks:
+                supplementaryView.updateUI(.links)
+            case .profileSuggestions:
+                supplementaryView.updateUI(.profileSuggestions)
+            }
+        }
         
         let dataSource = UICollectionViewDiffableDataSource<Section, Item>(collectionView: collectionView) { collectionView, indexPath, item in
             switch item {
@@ -138,6 +154,8 @@ class TrendsViewController: UIViewController, CollectionViewController {
         dataSource.supplementaryViewProvider = { (collectionView, elementKind, indexPath) in
             if elementKind == UICollectionView.elementKindSectionHeader {
                 return collectionView.dequeueConfiguredReusableSupplementary(using: sectionHeaderCell, for: indexPath)
+            } else if elementKind == UICollectionView.elementKindSectionFooter {
+                return collectionView.dequeueConfiguredReusableSupplementary(using: moreCell, for: indexPath)
             } else {
                 return nil
             }