Impl platform lock on ios

np_platform_lock/.metadata

@@ -4,7 +4,7 @@
 # This file should be version controlled.
 
 version:
-  revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
+  revision: f72efea43c3013323d1b95cff571f3c1caa37583
   channel: stable
 
 project_type: plugin
@@ -13,11 +13,14 @@ project_type: plugin
 migration:
   platforms:
     - platform: root
-      create_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
-      base_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
     - platform: android
-      create_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
-      base_revision: 4d9e56e694b656610ab87fcf2efbcd226e0ed8cf
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: ios
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
 
   # User provided section
 

np_platform_lock/ios/.gitignore

@@ -0,0 +1,38 @@
+.idea/
+.vagrant/
+.sconsign.dblite
+.svn/
+
+.DS_Store
+*.swp
+profile
+
+DerivedData/
+build/
+GeneratedPluginRegistrant.h
+GeneratedPluginRegistrant.m
+
+.generated/
+
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+
+xcuserdata
+
+*.moved-aside
+
+*.pyc
+*sync/
+Icon?
+.tags*
+
+/Flutter/Generated.xcconfig
+/Flutter/ephemeral/
+/Flutter/flutter_export_environment.sh

np_platform_lock/ios/Classes/K.swift

@@ -0,0 +1,5 @@
+import Foundation
+
+struct K {
+  static let libId = "com.nkming.nc_photos.np_platform_lock"
+}

np_platform_lock/ios/Classes/LockChannelHandler.swift

@@ -0,0 +1,73 @@
+import Flutter
+import Foundation
+
+class LockChannelHandler {
+  func onMethodCall(call: FlutterMethodCall, result: FlutterResult) {
+    let args = call.arguments as? Dictionary<String, Any>
+    do {
+      switch call.method {
+      case "tryLock":
+        try tryLock(
+          lockId: (args?["lockId"] as? Int).unwrap(),
+          result: result
+        )
+
+      case "unlock":
+        try unlock(
+          lockId: (args?["lockId"] as? Int).unwrap(),
+          result: result
+        )
+
+      default:
+        result(FlutterMethodNotImplemented)
+      }
+    } catch let error as AppError {
+      result(
+        FlutterError(
+          code: "systemException",
+          message: error.message,
+          details: "\(error.stackTrace)"
+        )
+      )
+    } catch {
+      result(
+        FlutterError(
+          code: "systemException",
+          message: "\(error)",
+          details: nil
+        )
+      )
+    }
+  }
+
+  private func tryLock(lockId: Int, result: FlutterResult) {
+    if LockChannelHandler.locks[lockId] != true {
+      LockChannelHandler.locks[lockId] = true
+      lockedIds += [lockId]
+      result(true)
+    } else {
+      result(false)
+    }
+  }
+
+  private func unlock(lockId: Int, result: FlutterResult) {
+    if LockChannelHandler.locks[lockId] == true {
+      LockChannelHandler.locks[lockId] = false
+      lockedIds.removeAll(where: { $0 == lockId })
+      result(nil)
+    } else {
+      result(
+        FlutterError(
+          code: "notLockedException",
+          message: "Cannot unlock without first locking",
+          details: nil
+        )
+      )
+    }
+  }
+
+  private var lockedIds: [Int] = []
+
+  static let methodChannel = "\(K.libId)/lock"
+  private static var locks: [Int:Bool] = [:]
+}

np_platform_lock/ios/Classes/NpPlatformLockPlugin.swift

@@ -0,0 +1,13 @@
+import Flutter
+import UIKit
+
+public class NpPlatformLockPlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let lockHandler = LockChannelHandler()
+    let lockChannel = FlutterMethodChannel(
+      name: LockChannelHandler.methodChannel,
+      binaryMessenger: registrar.messenger()
+    )
+    lockChannel.setMethodCallHandler(lockHandler.onMethodCall)
+  }
+}

np_platform_lock/ios/Classes/Util.swift

@@ -0,0 +1,35 @@
+import Foundation
+
+class AppError: Error {
+  init(_ message: String? = nil, stackTrace: [String] = Thread.callStackSymbols) {
+    self.message_ = message
+    self.stackTrace = stackTrace.joined(separator: "\n")
+  }
+
+  var description: String {
+    return "\(message_ ?? "") (throw: \(String(describing: self))\nStack trace:\n\(stackTrace)"
+  }
+
+  var message: String {
+    return message_ == nil ? String(describing: self) : message_!
+  }
+
+  let stackTrace: String
+  private let message_: String?
+}
+
+class NilError: AppError {
+}
+
+extension Optional {
+  func unwrap(
+    _ errorBuilder: (() -> Error)? = nil,
+    file: String = #fileID,
+    line: Int = #line
+  ) throws -> Wrapped {
+    guard let value = self else {
+      throw errorBuilder?() ?? NilError("\(type(of: self)) is nil in \(file):\(line)")
+    }
+    return value
+  }
+}

np_platform_lock/ios/np_platform_lock.podspec

@@ -0,0 +1,23 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint np_platform_lock.podspec` to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'np_platform_lock'
+  s.version          = '0.0.1'
+  s.summary          = 'A new Flutter plugin project.'
+  s.description      = <<-DESC
+A new Flutter plugin project.
+                       DESC
+  s.homepage         = 'http://example.com'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/**/*'
+  s.dependency 'Flutter'
+  s.platform = :ios, '9.0'
+
+  # Flutter.framework does not contain a i386 slice.
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
+  s.swift_version = '5.0'
+end

np_platform_lock/pubspec.yaml

@@ -25,3 +25,5 @@ flutter:
       android:
         package: com.nkming.nc_photos.np_platform_lock
         pluginClass: NpPlatformLockPlugin
+      ios:
+        pluginClass: NpPlatformLockPlugin