Fix instance public timelines not loading

Tusker/Screens/Timeline/InstanceTimelineViewController.swift

@@ -54,6 +54,15 @@ class InstanceTimelineViewController: TimelineTableViewController {
         toggleSaveButton.title = toggleSaveButtonTitle
     }
     
+    // MARK: - Table view data source
+    
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let cell = super.tableView(tableView, cellForRowAt: indexPath) as! TimelineStatusTableViewCell
+        cell.delegate = nil
+        cell.overrideMastodonController = mastodonController
+        return cell
+    }
+    
     // MARK: - Table view delegate
     
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

Tusker/Screens/Timeline/TimelineTableViewController.swift

@@ -58,7 +58,6 @@ class TimelineTableViewController: EnhancedTableViewController {
         
         tableView.prefetchDataSource = self
         
-        guard mastodonController.accessToken != nil else { return }
         loadInitialStatuses()
     }
     

Tusker/Views/Account Cell/AccountTableViewCell.swift

@@ -11,7 +11,7 @@ import UIKit
 class AccountTableViewCell: UITableViewCell {
 
     var delegate: TuskerNavigationDelegate?
-    var mastodonController: MastodonController? { delegate?.apiController }
+    var mastodonController: MastodonController! { delegate?.apiController }
     
     @IBOutlet weak var avatarImageView: UIImageView!
     @IBOutlet weak var displayNameLabel: UILabel!

Tusker/Views/Notifications/FollowNotificationGroupTableViewCell.swift

@@ -12,7 +12,7 @@ import Pachyderm
 class FollowNotificationGroupTableViewCell: UITableViewCell {
 
     var delegate: TuskerNavigationDelegate?
-    var mastodonController: MastodonController? { delegate?.apiController }
+    var mastodonController: MastodonController! { delegate?.apiController }
     
     @IBOutlet weak var avatarStackView: UIStackView!
     @IBOutlet weak var timestampLabel: UILabel!

Tusker/Views/Notifications/FollowRequestNotificationTableViewCell.swift

@@ -12,7 +12,7 @@ import Pachyderm
 class FollowRequestNotificationTableViewCell: UITableViewCell {
 
     var delegate: TuskerNavigationDelegate?
-    var mastodonController: MastodonController? { delegate?.apiController }
+    var mastodonController: MastodonController! { delegate?.apiController }
     
     @IBOutlet weak var stackView: UIStackView!
     @IBOutlet weak var avatarImageView: UIImageView!
@@ -90,7 +90,7 @@ class FollowRequestNotificationTableViewCell: UITableViewCell {
     
     @IBAction func rejectButtonPressed() {
         let request = Account.rejectFollowRequest(account)
-        mastodonController!.run(request) { (response) in
+        mastodonController.run(request) { (response) in
             guard case let .success(relationship, _) = response else { fatalError() }
             MastodonCache.add(relationship: relationship)
             DispatchQueue.main.async {
@@ -107,7 +107,7 @@ class FollowRequestNotificationTableViewCell: UITableViewCell {
     
     @IBAction func acceptButtonPressed() {
         let request = Account.authorizeFollowRequest(account)
-        mastodonController!.run(request) { (response) in
+        mastodonController.run(request) { (response) in
             guard case let .success(relationship, _) = response else { fatalError() }
             MastodonCache.add(relationship: relationship)
             DispatchQueue.main.async {

Tusker/Views/Profile Header/ProfileHeaderTableViewCell.swift

@@ -16,7 +16,7 @@ protocol ProfileHeaderTableViewCellDelegate: TuskerNavigationDelegate {
 class ProfileHeaderTableViewCell: UITableViewCell {
     
     var delegate: ProfileHeaderTableViewCellDelegate?
-    var mastodonController: MastodonController? { delegate?.apiController }
+    var mastodonController: MastodonController! { delegate?.apiController }
 
     @IBOutlet weak var headerImageView: UIImageView!
     @IBOutlet weak var avatarContainerView: UIView!
@@ -83,7 +83,7 @@ class ProfileHeaderTableViewCell: UITableViewCell {
         noteLabel.setTextFromHtml(account.note)
         noteLabel.setEmojis(account.emojis)
         
-        if accountID != mastodonController!.account.id {
+        if accountID != mastodonController.account.id {
             // don't show relationship label for the user's own account
             if let relationship = MastodonCache.relationship(for: accountID) {
                 followsYouLabel.isHidden = !relationship.followedBy

Tusker/Views/Status/BaseStatusTableViewCell.swift

@@ -21,7 +21,8 @@ class BaseStatusTableViewCell: UITableViewCell {
             contentLabel.navigationDelegate = delegate
         }
     }
-    var mastodonController: MastodonController? { delegate?.apiController }
+    var overrideMastodonController: MastodonController?
+    var mastodonController: MastodonController! { overrideMastodonController ?? delegate?.apiController }
 
     @IBOutlet weak var avatarImageView: UIImageView!
     @IBOutlet weak var displayNameLabel: UILabel!
@@ -249,7 +250,7 @@ class BaseStatusTableViewCell: UITableViewCell {
         
         let realStatus: Status = status.reblog ?? status
         let request = (favorited ? Status.favourite : Status.unfavourite)(realStatus)
-        mastodonController!.run(request) { response in
+        mastodonController.run(request) { response in
             DispatchQueue.main.async {
                 if case let .success(newStatus, _) = response {
                     self.favorited = newStatus.favourited ?? false
@@ -274,7 +275,7 @@ class BaseStatusTableViewCell: UITableViewCell {
         
         let realStatus: Status = status.reblog ?? status
         let request = (reblogged ? Status.reblog : Status.unreblog)(realStatus)
-        mastodonController!.run(request) { response in
+        mastodonController.run(request) { response in
             DispatchQueue.main.async {
                 if case let .success(newStatus, _) = response {
                     self.reblogged = newStatus.reblogged ?? false