feat: connection groups with multi-selection and hierarchical management

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Connection groups: organize connections into named, color-coded folders with support for nested subgroups, drag-and-drop reordering, expand/collapse state persistence, and context menus for group and connection management
+
 ## [0.13.0] - 2026-03-04
 
 ### Added

TablePro/Core/Storage/ConnectionStorage.swift

@@ -358,6 +358,9 @@ private struct StoredConnection: Codable {
     // AI policy
     let aiPolicy: String?
 
+    // Sort order
+    let sortOrder: Int
+
     init(from connection: DatabaseConnection) {
         self.id = connection.id
         self.name = connection.name
@@ -392,6 +395,9 @@ private struct StoredConnection: Codable {
 
         // AI policy
         self.aiPolicy = connection.aiPolicy?.rawValue
+
+        // Sort order
+        self.sortOrder = connection.sortOrder
     }
 
     // Custom decoder to handle migration from old format
@@ -428,6 +434,7 @@ private struct StoredConnection: Codable {
         groupId = try container.decodeIfPresent(String.self, forKey: .groupId)
         isReadOnly = try container.decodeIfPresent(Bool.self, forKey: .isReadOnly) ?? false
         aiPolicy = try container.decodeIfPresent(String.self, forKey: .aiPolicy)
+        sortOrder = try container.decodeIfPresent(Int.self, forKey: .sortOrder) ?? 0
     }
 
     func toConnection() -> DatabaseConnection {
@@ -467,7 +474,8 @@ private struct StoredConnection: Codable {
             tagId: parsedTagId,
             groupId: parsedGroupId,
             isReadOnly: isReadOnly,
-            aiPolicy: parsedAIPolicy
+            aiPolicy: parsedAIPolicy,
+            sortOrder: sortOrder
         )
     }
 }

TablePro/Core/Storage/GroupStorage.swift

@@ -12,6 +12,7 @@ final class GroupStorage {
     private static let logger = Logger(subsystem: "com.TablePro", category: "GroupStorage")
 
     private let groupsKey = "com.TablePro.groups"
+    private let expandedGroupsKey = "com.TablePro.expandedGroups"
     private let defaults = UserDefaults.standard
     private let encoder = JSONEncoder()
     private let decoder = JSONDecoder()
@@ -47,9 +48,6 @@ final class GroupStorage {
     /// Add a new group
     func addGroup(_ group: ConnectionGroup) {
         var groups = loadGroups()
-        guard !groups.contains(where: { $0.name.lowercased() == group.name.lowercased() }) else {
-            return
-        }
         groups.append(group)
         saveGroups(groups)
     }
@@ -63,15 +61,87 @@ final class GroupStorage {
         }
     }
 
-    /// Delete a group
+    /// Delete a group and all its descendants.
+    /// Member connections become ungrouped.
     func deleteGroup(_ group: ConnectionGroup) {
         var groups = loadGroups()
-        groups.removeAll { $0.id == group.id }
+        let deletedIds = collectDescendantIds(of: group.id, in: groups)
+        let allDeletedIds = deletedIds.union([group.id])
+
+        // Remove deleted groups
+        groups.removeAll { allDeletedIds.contains($0.id) }
         saveGroups(groups)
+
+        // Ungroup connections that belonged to deleted groups
+        let storage = ConnectionStorage.shared
+        var connections = storage.loadConnections()
+        var changed = false
+        for index in connections.indices {
+            if let gid = connections[index].groupId, allDeletedIds.contains(gid) {
+                connections[index].groupId = nil
+                changed = true
+            }
+        }
+        if changed {
+            storage.saveConnections(connections)
+        }
     }
 
     /// Get group by ID
     func group(for id: UUID) -> ConnectionGroup? {
         loadGroups().first { $0.id == id }
     }
+
+    /// Get child groups of a parent, sorted by sortOrder
+    func childGroups(of parentId: UUID?) -> [ConnectionGroup] {
+        loadGroups()
+            .filter { $0.parentGroupId == parentId }
+            .sorted { $0.sortOrder < $1.sortOrder }
+    }
+
+    /// Get the next sort order for a new item in a parent context
+    func nextSortOrder(parentId: UUID?) -> Int {
+        let siblings = loadGroups().filter { $0.parentGroupId == parentId }
+        return (siblings.map(\.sortOrder).max() ?? -1) + 1
+    }
+
+    // MARK: - Expanded State
+
+    /// Load the set of expanded group IDs
+    func loadExpandedGroupIds() -> Set<UUID> {
+        guard let data = defaults.data(forKey: expandedGroupsKey) else {
+            return []
+        }
+
+        do {
+            let ids = try decoder.decode([UUID].self, from: data)
+            return Set(ids)
+        } catch {
+            Self.logger.error("Failed to load expanded groups: \(error)")
+            return []
+        }
+    }
+
+    /// Save the set of expanded group IDs
+    func saveExpandedGroupIds(_ ids: Set<UUID>) {
+        do {
+            let data = try encoder.encode(Array(ids))
+            defaults.set(data, forKey: expandedGroupsKey)
+        } catch {
+            Self.logger.error("Failed to save expanded groups: \(error)")
+        }
+    }
+
+    // MARK: - Helpers
+
+    /// Recursively collect all descendant group IDs
+    private func collectDescendantIds(of groupId: UUID, in groups: [ConnectionGroup]) -> Set<UUID> {
+        var result = Set<UUID>()
+        let children = groups.filter { $0.parentGroupId == groupId }
+        for child in children {
+            result.insert(child.id)
+            result.formUnion(collectDescendantIds(of: child.id, in: groups))
+        }
+        return result
+    }
 }

TablePro/Models/ConnectionGroup.swift

@@ -5,15 +5,40 @@
 
 import Foundation
 
-/// A named group (folder) for organizing database connections
+/// A group for organizing database connections into folders
 struct ConnectionGroup: Identifiable, Hashable, Codable {
     let id: UUID
     var name: String
     var color: ConnectionColor
+    var parentGroupId: UUID?
+    var sortOrder: Int
 
-    init(id: UUID = UUID(), name: String, color: ConnectionColor = .none) {
+    init(
+        id: UUID = UUID(),
+        name: String,
+        color: ConnectionColor = .blue,
+        parentGroupId: UUID? = nil,
+        sortOrder: Int = 0
+    ) {
         self.id = id
         self.name = name
         self.color = color
+        self.parentGroupId = parentGroupId
+        self.sortOrder = sortOrder
+    }
+
+    // MARK: - Codable (Migration Support)
+
+    enum CodingKeys: String, CodingKey {
+        case id, name, color, parentGroupId, sortOrder
+    }
+
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        id = try container.decode(UUID.self, forKey: .id)
+        name = try container.decode(String.self, forKey: .name)
+        color = try container.decodeIfPresent(ConnectionColor.self, forKey: .color) ?? .blue
+        parentGroupId = try container.decodeIfPresent(UUID.self, forKey: .parentGroupId)
+        sortOrder = try container.decodeIfPresent(Int.self, forKey: .sortOrder) ?? 0
     }
 }

TablePro/Models/DatabaseConnection.swift

@@ -261,6 +261,7 @@ struct DatabaseConnection: Identifiable, Hashable {
     var aiPolicy: AIConnectionPolicy?
     var mongoReadPreference: String?
     var mongoWriteConcern: String?
+    var sortOrder: Int
     var redisDatabase: Int?
 
     init(
@@ -280,6 +281,7 @@ struct DatabaseConnection: Identifiable, Hashable {
         aiPolicy: AIConnectionPolicy? = nil,
         mongoReadPreference: String? = nil,
         mongoWriteConcern: String? = nil,
+        sortOrder: Int = 0,
         redisDatabase: Int? = nil
     ) {
         self.id = id
@@ -298,6 +300,7 @@ struct DatabaseConnection: Identifiable, Hashable {
         self.aiPolicy = aiPolicy
         self.mongoReadPreference = mongoReadPreference
         self.mongoWriteConcern = mongoWriteConcern
+        self.sortOrder = sortOrder
         self.redisDatabase = redisDatabase
     }