From 93ba06b91529f7c552c3610eb6e4f0a9ed34d679 Mon Sep 17 00:00:00 2001
From: Ivan Magda <ivan.magda@stepik.org>
Date: Thu, 31 Mar 2022 10:22:32 +0300
Subject: [PATCH] Analytics accessibility (#1142)

* Report isVoiceOverRunning

* Report fontScale

* Refactor rename
---
 .../Analytics/AnalyticsUserProperties.swift   | 39 ++++++++++++++-----
 Stepic/Legacy/AppDelegate.swift               |  2 +
 2 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/Stepic/Legacy/Analytics/AnalyticsUserProperties.swift b/Stepic/Legacy/Analytics/AnalyticsUserProperties.swift
index 9236218998..2fa9079950 100644
--- a/Stepic/Legacy/Analytics/AnalyticsUserProperties.swift
+++ b/Stepic/Legacy/Analytics/AnalyticsUserProperties.swift
@@ -1,15 +1,7 @@
-//
-//  AnalyticsUserProperties.swift
-//  Stepic
-//
-//  Created by Ostrenkiy on 20.06.2018.
-//  Copyright © 2018 Alex Karpov. All rights reserved.
-//
-
 import Amplitude
 import FirebaseAnalytics
 import FirebaseCrashlytics
-import Foundation
+import UIKit
 import YandexMobileMetrica
 
 final class AnalyticsUserProperties: ABAnalyticsServiceProtocol {
@@ -110,6 +102,33 @@ final class AnalyticsUserProperties: ABAnalyticsServiceProtocol {
         self.setAmplitudeProperty(key: UserPropertyKey.isNightModeEnabled.rawValue, value: "\(isEnabled)")
     }
 
+    func updateAccessibilityIsVoiceOverRunning() {
+        self.setAmplitudeProperty(
+            key: UserPropertyKey.isAccessibilityScreenReaderEnabled.rawValue,
+            value: UIAccessibility.isVoiceOverRunning
+        )
+    }
+
+    func updateAccessibilityFontScale() {
+        guard #available(iOS 13.0, *) else {
+            return
+        }
+
+        let defaultBodyFont = UIFont.preferredFont(
+            forTextStyle: .body,
+            compatibleWith: UITraitCollection(preferredContentSizeCategory: .large)
+        )
+
+        let currentBodyFont = UIFont.preferredFont(
+            forTextStyle: .body,
+            compatibleWith: UITraitCollection.current
+        )
+
+        let fontScale = currentBodyFont.pointSize / defaultBodyFont.pointSize
+
+        self.setAmplitudeProperty(key: UserPropertyKey.accessibilityFontScale.rawValue, value: fontScale)
+    }
+
     func setRemoteConfigUserProperties(_ keysAndValues: [String: Any]) {
         Amplitude.instance().setUserProperties(keysAndValues)
         Crashlytics.crashlytics().setCustomKeysAndValues(keysAndValues)
@@ -167,5 +186,7 @@ final class AnalyticsUserProperties: ABAnalyticsServiceProtocol {
         case screenOrientation = "screen_orientation"
         case applicationID = "application_id"
         case isNightModeEnabled = "is_night_mode_enabled"
+        case isAccessibilityScreenReaderEnabled = "accessibility_screen_reader_enabled"
+        case accessibilityFontScale = "accessibility_font_scale"
     }
 }
diff --git a/Stepic/Legacy/AppDelegate.swift b/Stepic/Legacy/AppDelegate.swift
index 716d286e52..0c1199c3bd 100644
--- a/Stepic/Legacy/AppDelegate.swift
+++ b/Stepic/Legacy/AppDelegate.swift
@@ -60,6 +60,8 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         AnalyticsUserProperties.shared.setApplicationID(id: Bundle.main.bundleIdentifier!)
         AnalyticsUserProperties.shared.updateUserID()
         AnalyticsUserProperties.shared.updateIsDarkModeEnabled()
+        AnalyticsUserProperties.shared.updateAccessibilityFontScale()
+        AnalyticsUserProperties.shared.updateAccessibilityIsVoiceOverRunning()
 
         NotificationsBadgesManager.shared.setup()