Cache pool models, do not rebuild each time

Invalidate on new infrastructure.

Passepartout-iOS/Scenes/ProviderPoolViewController.swift

@@ -26,36 +26,6 @@
 import UIKit
 import Passepartout_Core
 
-private class PoolModel {
-    let title: String
-    
-    var poolsByGroup: [PoolGroup: [Pool]] = [:]
-    
-    private(set) var sortedGroups: [PoolGroup] = []
-    
-    var isEmpty: Bool {
-        return sortedGroups.isEmpty
-    }
-    
-    init(title: String) {
-        self.title = title
-    }
-    
-    func addPool(_ p: Pool) {
-        let group = p.group()
-        if var existingPools = poolsByGroup[group] {
-            existingPools.append(p)
-            poolsByGroup[group] = existingPools
-        } else {
-            poolsByGroup[group] = [p]
-        }
-    }
-    
-    func sort() {
-        sortedGroups = poolsByGroup.keys.sorted()
-    }
-}
-
 protocol ProviderPoolViewControllerDelegate: class {
     func providerPoolController(_: ProviderPoolViewController, didSelectPool pool: Pool)
 }
@@ -69,28 +39,19 @@ class ProviderPoolViewController: UIViewController {
     
     weak var delegate: ProviderPoolViewControllerDelegate?
 
-    func setPools(_ pools: [Pool], currentPoolId: String?) {
+    func setModels(_ models: [PoolModel], currentPoolId: String?) {
-        let freeModel = PoolModel(title: L10n.Provider.Pool.Sections.Free.header)
+        self.models = models
-        let paidModel = PoolModel(title: L10n.Provider.Pool.Sections.Paid.header)
-        for p in pools {
-            if p.isFree ?? false {
-                freeModel.addPool(p)
-            } else {
-                paidModel.addPool(p)
-            }
-            if p.id == currentPoolId {
-                currentPool = p
-            }
-        }
-        freeModel.sort()
-        paidModel.sort()
         
-        models = []
+        // XXX: uglyyy
-        if !freeModel.isEmpty {
+        for m in models {
-            models.append(freeModel)
+            for pools in m.poolsByGroup.values {
-        }
+                for p in pools {
-        if !paidModel.isEmpty {
+                    if p.id == currentPoolId {
-            models.append(paidModel)
+                        currentPool = p
+                        return
+                    }
+                }
+            }
         }
     }
     
@@ -140,7 +101,7 @@ extension ProviderPoolViewController: UITableViewDataSource, UITableViewDelegate
             return nil
         }
         let model = models[section]
-        return model.title
+        return model.isFree ? L10n.Provider.Pool.Sections.Free.header : L10n.Provider.Pool.Sections.Paid.header
     }
     
     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

Passepartout-iOS/Scenes/ServiceViewController.swift

@@ -152,7 +152,7 @@ class ServiceViewController: UIViewController, TableModelHost {
             
         case .providerPoolSegueIdentifier:
             let vc = destination as? ProviderPoolViewController
-            vc?.setPools(uncheckedProviderProfile.pools(), currentPoolId: uncheckedProviderProfile.poolId)
+            vc?.setModels(InfrastructureCache.shared.poolModels(for: uncheckedProviderProfile), currentPoolId: uncheckedProviderProfile.poolId)
             vc?.delegate = self
             
         case .endpointSegueIdentifier:
@@ -289,14 +289,19 @@ class ServiceViewController: UIViewController, TableModelHost {
     }
     
     private func refreshProviderInfrastructure() {
+        let name = uncheckedProviderProfile.name
+        
         let hud = HUD()
-        let isUpdating = InfrastructureFactory.shared.update(uncheckedProviderProfile.name, notBeforeInterval: AppConstants.Web.minimumUpdateInterval) { (response, error) in
+        let isUpdating = InfrastructureFactory.shared.update(name, notBeforeInterval: AppConstants.Web.minimumUpdateInterval) { (response, error) in
             hud.hide()
             guard let response = response else {
                 return
             }
             self.lastInfrastructureUpdate = response.1
             self.tableView.reloadData()
+            
+            // invalidate current pool cache
+            InfrastructureCache.shared.removePoolModels(for: name)
         }
         if !isUpdating {
             hud.hide()

Passepartout-iOS/Scenes/Shortcuts/ShortcutsConnectToViewController.swift

@@ -89,7 +89,7 @@ class ShortcutsConnectToViewController: UITableViewController, ProviderPoolViewC
         guard let provider = selectedProfile as? ProviderConnectionProfile else {
             return
         }
-        vc.setPools(provider.pools(), currentPoolId: nil)
+        vc.setModels(InfrastructureCache.shared.poolModels(for: provider), currentPoolId: nil)
         vc.delegate = self
     }
 

Passepartout.xcodeproj/project.pbxproj

@@ -79,6 +79,8 @@
 		0E58BD9322404EF1006FB157 /* Intents.intentdefinition in Sources */ = {isa = PBXBuildFile; fileRef = 0E58BD9122404EF1006FB157 /* Intents.intentdefinition */; };
 		0E58BF65224152F9006FB157 /* Intents.intentdefinition in Sources */ = {isa = PBXBuildFile; fileRef = 0E58BD9122404EF1006FB157 /* Intents.intentdefinition */; settings = {ATTRIBUTES = (no_codegen, ); }; };
 		0E58BF68224305A8006FB157 /* Countries.strings in Resources */ = {isa = PBXBuildFile; fileRef = 0E58BF6A224305A8006FB157 /* Countries.strings */; };
+		0E66A270225FE25800F9C779 /* PoolModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E66A26F225FE25800F9C779 /* PoolModel.swift */; };
+		0E66A272225FE5FB00F9C779 /* InfrastructureCache.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E66A271225FE5FB00F9C779 /* InfrastructureCache.swift */; };
 		0E6BE13F20CFBAB300A6DD36 /* DebugLogViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E6BE13E20CFBAB300A6DD36 /* DebugLogViewController.swift */; };
 		0E773BF8224BF37600CDDC8E /* ShortcutsViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E773BF7224BF37600CDDC8E /* ShortcutsViewController.swift */; };
 		0E89DFCE213EEDFA00741BA1 /* WizardProviderViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0E89DFCD213EEDFA00741BA1 /* WizardProviderViewController.swift */; };
@@ -217,6 +219,8 @@
 		0E5E5DDE215119AF00E318A3 /* VPNStatus.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VPNStatus.swift; sourceTree = "<group>"; };
 		0E5E5DE1215119DD00E318A3 /* VPNConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VPNConfiguration.swift; sourceTree = "<group>"; };
 		0E5E5DE421511C5F00E318A3 /* GracefulVPN.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GracefulVPN.swift; sourceTree = "<group>"; };
+		0E66A26F225FE25800F9C779 /* PoolModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PoolModel.swift; sourceTree = "<group>"; };
+		0E66A271225FE5FB00F9C779 /* InfrastructureCache.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InfrastructureCache.swift; sourceTree = "<group>"; };
 		0E6BE13920CFB76800A6DD36 /* ApplicationError.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ApplicationError.swift; sourceTree = "<group>"; };
 		0E6BE13E20CFBAB300A6DD36 /* DebugLogViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DebugLogViewController.swift; sourceTree = "<group>"; };
 		0E773BF7224BF37600CDDC8E /* ShortcutsViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ShortcutsViewController.swift; sourceTree = "<group>"; };
@@ -476,7 +480,9 @@
 			isa = PBXGroup;
 			children = (
 				0EBE3AA3213DC1B000BFA2F5 /* HostConnectionProfile.swift */,
+				0E66A271225FE5FB00F9C779 /* InfrastructureCache.swift */,
 				0E79D13E21919EC900BB5FB2 /* PlaceholderConnectionProfile.swift */,
+				0E66A26F225FE25800F9C779 /* PoolModel.swift */,
 				0E79D14021919F5600BB5FB2 /* ProfileKey.swift */,
 				0EBE3AA4213DC1B000BFA2F5 /* ProviderConnectionProfile.swift */,
 			);
@@ -1005,6 +1011,7 @@
 			files = (
 				0E3152BD223FA03D00F61841 /* GroupConstants.swift in Sources */,
 				0ECEB10A224FECEA00E9E551 /* DataUnit.swift in Sources */,
+				0E66A270225FE25800F9C779 /* PoolModel.swift in Sources */,
 				0E3152C2223FA04800F61841 /* MockVPNProvider.swift in Sources */,
 				0E533B162258E03B00EF94FC /* PoolGroup.swift in Sources */,
 				0E3152D2223FA05400F61841 /* DebugLog.swift in Sources */,
@@ -1035,6 +1042,7 @@
 				0E3152CD223FA05400F61841 /* ConnectionProfile.swift in Sources */,
 				0E3152BC223FA03D00F61841 /* ApplicationError.swift in Sources */,
 				0E3152C9223FA04D00F61841 /* InfrastructureFactory.swift in Sources */,
+				0E66A272225FE5FB00F9C779 /* InfrastructureCache.swift in Sources */,
 				0E58BD9322404EF1006FB157 /* Intents.intentdefinition in Sources */,
 				0E3152D3223FA05400F61841 /* EndpointDataSource.swift in Sources */,
 				0E3152D4223FA05400F61841 /* Preferences.swift in Sources */,

Passepartout/Sources/Model/Profiles/InfrastructureCache.swift

@@ -0,0 +1,74 @@
+//
+//  InfrastructureCache.swift
+//  Passepartout
+//
+//  Created by Davide De Rosa on 4/11/19.
+//  Copyright (c) 2019 Davide De Rosa. All rights reserved.
+//
+//  https://github.com/passepartoutvpn
+//
+//  This file is part of Passepartout.
+//
+//  Passepartout is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  Passepartout is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with Passepartout.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import Foundation
+
+public class InfrastructureCache {
+    public static let shared = InfrastructureCache()
+    
+    private var poolModelsByName: [Infrastructure.Name: [PoolModel]]
+    
+    private init() {
+        poolModelsByName = [:]
+    }
+    
+    public func poolModels(for provider: ProviderConnectionProfile) -> [PoolModel] {
+        if let models = poolModelsByName[provider.name] {
+            return models
+        }
+        let freeModel = PoolModel(isFree: true)
+        let paidModel = PoolModel(isFree: false)
+        for p in provider.infrastructure.pools {
+            if p.isFree ?? false {
+                freeModel.addPool(p)
+            } else {
+                paidModel.addPool(p)
+            }
+//            if p.id == currentPoolId {
+//                currentPool = p
+//            }
+        }
+        freeModel.sort()
+        paidModel.sort()
+        
+        var models: [PoolModel] = []
+        if !freeModel.isEmpty {
+            models.append(freeModel)
+        }
+        if !paidModel.isEmpty {
+            models.append(paidModel)
+        }
+        poolModelsByName[provider.name] = models
+        return models
+    }
+    
+    public func removePoolModels(for name: Infrastructure.Name? = nil) {
+        if let name = name {
+            poolModelsByName.removeValue(forKey: name)
+            return
+        }
+        poolModelsByName.removeAll()
+    }
+}

Passepartout/Sources/Model/Profiles/PoolModel.swift

@@ -0,0 +1,58 @@
+//
+//  PoolModel.swift
+//  Passepartout
+//
+//  Created by Davide De Rosa on 4/11/19.
+//  Copyright (c) 2019 Davide De Rosa. All rights reserved.
+//
+//  https://github.com/passepartoutvpn
+//
+//  This file is part of Passepartout.
+//
+//  Passepartout is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  Passepartout is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with Passepartout.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+import Foundation
+
+public class PoolModel {
+    public let isFree: Bool
+    
+    public var poolsByGroup: [PoolGroup: [Pool]]
+    
+    public private(set) var sortedGroups: [PoolGroup]
+    
+    public init(isFree: Bool) {
+        self.isFree = isFree
+        poolsByGroup = [:]
+        sortedGroups = []
+    }
+    
+    public var isEmpty: Bool {
+        return sortedGroups.isEmpty
+    }
+    
+    public func addPool(_ p: Pool) {
+        let group = p.group()
+        if var existingPools = poolsByGroup[group] {
+            existingPools.append(p)
+            poolsByGroup[group] = existingPools
+        } else {
+            poolsByGroup[group] = [p]
+        }
+    }
+    
+    public func sort() {
+        sortedGroups = poolsByGroup.keys.sorted()
+    }
+}

Passepartout/Sources/Model/Profiles/ProviderConnectionProfile.swift

@@ -72,10 +72,6 @@ public class ProviderConnectionProfile: ConnectionProfile, Codable, Equatable {
         presetId = infrastructure.defaults.preset
     }
     
-    public func pools() -> [Pool] {
-        return infrastructure.pools
-    }
-    
     private func validateEndpoint() {
         guard let pool = pool, let preset = preset else {
             manualAddress = nil