pin conversations

Session/Home/HomeVC.swift

@@ -356,6 +356,21 @@ final class HomeVC : BaseVC, UITableViewDataSource, UITableViewDelegate, NewConv
             self.present(alert, animated: true, completion: nil)
         }
         delete.backgroundColor = Colors.destructive
+        
+        let isPinned = thread.isPinned
+        let pin = UITableViewRowAction(style: .normal, title: NSLocalizedString("PIN_BUTTON_TEXT", comment: "")) { _, _ in
+            thread.isPinned = true
+            thread.save()
+            tableView.reloadRows(at: [ indexPath ], with: UITableView.RowAnimation.fade)
+        }
+        pin.backgroundColor = Colors.pathsBuilding
+        let unpin = UITableViewRowAction(style: .normal, title: NSLocalizedString("UNPIN_BUTTON_TEXT", comment: "")) { _, _ in
+            thread.isPinned = false
+            thread.save()
+            tableView.reloadRows(at: [ indexPath ], with: UITableView.RowAnimation.fade)
+        }
+        unpin.backgroundColor = Colors.pathsBuilding
+        
         if let thread = thread as? TSContactThread {
             let publicKey = thread.contactSessionID()
             let blockingManager = SSKEnvironment.shared.blockingManager
@@ -370,9 +385,9 @@ final class HomeVC : BaseVC, UITableViewDataSource, UITableViewDelegate, NewConv
                 tableView.reloadRows(at: [ indexPath ], with: UITableView.RowAnimation.fade)
             }
             unblock.backgroundColor = Colors.unimportant
-            return [ delete, (isBlocked ? unblock : block) ]
+            return [ delete, (isBlocked ? unblock : block), (isPinned ? unpin : pin) ]
         } else {
-            return [ delete ]
+            return [ delete, (isPinned ? unpin : pin) ]
         }
     }
     

Session/Meta/Images.xcassets/Session/Pin.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "pin.pdf",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Session/Meta/Translations/en.lproj/Localizable.strings

@@ -576,3 +576,5 @@
 "system_mode_theme" = "System";
 "dark_mode_theme" = "Dark";
 "light_mode_theme" = "Light";
+"PIN_BUTTON_TEXT" = "Pin";
+"UNPIN_BUTTON_TEXT" = "Unpin";

Session/Shared/ConversationCell.swift

@@ -58,6 +58,17 @@ final class ConversationCell : UITableViewCell {
         return result
     }()
     
+    private lazy var isPinnedIcon: UIImageView = {
+        let result = UIImageView(image: UIImage(named: "Pin")!.withRenderingMode(.alwaysTemplate))
+        result.contentMode = .scaleAspectFit
+        let size = ConversationCell.unreadCountViewSize
+        result.set(.width, to: size)
+        result.set(.height, to: size)
+        result.tintColor = Colors.text
+        result.layer.masksToBounds = true
+        return result
+    }()
+    
     private lazy var timestampLabel: UILabel = {
         let result = UILabel()
         result.font = .systemFont(ofSize: Values.smallFontSize)
@@ -124,7 +135,7 @@ final class ConversationCell : UITableViewCell {
         hasMentionLabel.pin(to: hasMentionView)
         // Label stack view
         let topLabelSpacer = UIView.hStretchingSpacer()
-        let topLabelStackView = UIStackView(arrangedSubviews: [ displayNameLabel, unreadCountView, hasMentionView, topLabelSpacer, timestampLabel ])
+        let topLabelStackView = UIStackView(arrangedSubviews: [ displayNameLabel, isPinnedIcon, unreadCountView, hasMentionView, topLabelSpacer, timestampLabel ])
         topLabelStackView.axis = .horizontal
         topLabelStackView.alignment = .center
         topLabelStackView.spacing = Values.smallSpacing / 2 // Effectively Values.smallSpacing because there'll be spacing before and after the invisible spacer
@@ -182,6 +193,7 @@ final class ConversationCell : UITableViewCell {
     private func update() {
         AssertIsOnMainThread()
         guard let thread = threadViewModel?.threadRecord else { return }
+        backgroundColor = thread.isPinned ? Colors.cellPinned : Colors.cellBackground
         let isBlocked: Bool
         if let thread = thread as? TSContactThread {
             isBlocked = SSKEnvironment.shared.blockingManager.isRecipientIdBlocked(thread.contactSessionID())
@@ -195,6 +207,7 @@ final class ConversationCell : UITableViewCell {
             accentLineView.backgroundColor = Colors.accent
             accentLineView.alpha = threadViewModel.hasUnreadMessages ? 1 : 0.0001 // Setting the alpha to exactly 0 causes an issue on iOS 12
         }
+        isPinnedIcon.isHidden = !threadViewModel.isPinned
         unreadCountView.isHidden = !threadViewModel.hasUnreadMessages
         let unreadCount = threadViewModel.unreadCount
         unreadCountLabel.text = unreadCount < 100 ? "\(unreadCount)" : "99+"

SessionMessagingKit/Database/TSDatabaseView.m

@@ -278,7 +278,10 @@ NSString *const TSLazyRestoreAttachmentsGroup = @"TSLazyRestoreAttachmentsGroup"
         TSThread *thread1 = (TSThread *)object1;
         TSThread *thread2 = (TSThread *)object2;
         if ([group isEqualToString:TSArchiveGroup] || [group isEqualToString:TSInboxGroup]) {
-            
+            if (thread1.isPinned != thread2.isPinned) {
+                if (thread1.isPinned) { return NSOrderedDescending; }
+                if (thread2.isPinned) { return NSOrderedAscending; }
+            }
             TSInteraction *_Nullable lastInteractionForInbox1 =
                 [thread1 lastInteractionForInboxWithTransaction:transaction];
             NSDate *lastInteractionForInboxDate1 = lastInteractionForInbox1 ? lastInteractionForInbox1.receivedAtDate : thread1.creationDate;

SessionMessagingKit/Threads/TSThread.h

@@ -16,6 +16,7 @@ BOOL IsNoteToSelfEnabled(void);
  */
 @interface TSThread : TSYapDatabaseObject
 
+@property (nonatomic) BOOL isPinned;
 @property (nonatomic) BOOL shouldBeVisible;
 @property (nonatomic, readonly) NSDate *creationDate;
 @property (nonatomic, readonly, nullable) NSDate *lastInteractionDate;

SessionUIKit/Style Guide/Colors.swift

@@ -20,6 +20,7 @@ public final class Colors : NSObject {
     @objc public static var border: UIColor { UIColor(named: "session_border")! }
     @objc public static var cellBackground: UIColor { UIColor(named: "session_cell_background")! }
     @objc public static var cellSelected: UIColor { UIColor(named: "session_cell_selected")! }
+    @objc public static var cellPinned: UIColor { UIColor(named: "session_cell_pinned")! }
     @objc public static var navigationBarBackground: UIColor { UIColor(named: "session_navigation_bar_background")! }
     @objc public static var searchBarPlaceholder: UIColor { UIColor(named: "session_search_bar_placeholder")! } // Also used for the icons
     @objc public static var searchBarBackground: UIColor { UIColor(named: "session_search_bar_background")! }

SessionUIKit/Style Guide/Colors.xcassets/session_cell_pinned.colorset/Contents.json

@@ -0,0 +1,38 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0xF0",
+          "green" : "0xF0",
+          "red" : "0xF0"
+        }
+      },
+      "idiom" : "universal"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0x40",
+          "green" : "0x40",
+          "red" : "0x40"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

SignalUtilitiesKit/Messaging/ThreadViewModel.swift

@@ -14,6 +14,7 @@ public class ThreadViewModel: NSObject {
     @objc public let contactSessionID: String?
     @objc public let name: String
     @objc public let isMuted: Bool
+    @objc public let isPinned: Bool
     @objc public let isOnlyNotifyingForMentions: Bool
     @objc public let hasUnreadMentions: Bool
 
@@ -31,6 +32,7 @@ public class ThreadViewModel: NSObject {
         self.isGroupThread = thread.isGroupThread()
         self.name = thread.name()
         self.isMuted = thread.isMuted
+        self.isPinned = thread.isPinned
         self.lastMessageText = thread.lastMessageText(transaction: transaction)
         let lastInteraction = thread.lastInteractionForInbox(transaction: transaction)
         self.lastMessageForInbox = lastInteraction