[HEAP-44383] - Improved iOS device model data (#110)

Author: BryanMitchell-heap

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Changed process to retrieve iOS device model. 'sysctlbyname' is now used to retrieve the 
+  detailed hardware identifier (e.g., "iPhone10,3"). This results in more specific 
+  model identification than the generic `UIDevice.model` approach which is now used
+  as a fallback.
+
 ## [0.2.1]
 
 ### Fixed

Development/Sources/HeapSwiftCore/Protobufs/Extensions/DeviceInfo.iOS.swift

@@ -4,12 +4,26 @@ import UIKit
 import CoreTelephony
 
 extension DeviceInfo {
+    
+    /// Returns the specific model name of the current device.
+    ///
+    /// `UIDevice.model` only provides a generic model name (e.g., "iPhone"). This method, on the other hand,
+    /// utilizes `sysctlbyname` to retrieve the detailed hardware identifier (e.g., "iPhone10,3" for iPhone X).
+    /// If `sysctlbyname` fails, the function returns `nil`.
+    var detailedModelName: String? {
+        var size: Int = 0
+        guard sysctlbyname("hw.machine", nil, &size, nil, 0) == 0 else { return nil }
+        var machine = [CChar](repeating: 0, count: size)
+        guard sysctlbyname("hw.machine", &machine, &size, nil, 0) == 0 else { return nil }
+        return String(cString: machine)
+    }
+    
     static func current(with settings: FieldSettings, includeCarrier: Bool) -> DeviceInfo {
         let device = UIDevice.current
         var deviceInfo = DeviceInfo()
         deviceInfo.type = getDeviceType(device)
         deviceInfo.platform = getPlatform(device)
-        deviceInfo.model = getMacModel() ?? device.model
+        deviceInfo.model = getMacModel() ?? deviceInfo.detailedModelName ?? device.model
         if includeCarrier,
            let carrier = getCarrier() {
             deviceInfo.carrier = carrier