Decouple core Yaak logic from Tauri (#354)

crates/yaak-common/src/platform.rs

@@ -0,0 +1,55 @@
+use crate::platform::OperatingSystem::{Linux, MacOS, Unknown, Windows};
+
+pub enum OperatingSystem {
+    Windows,
+    MacOS,
+    Linux,
+    Unknown,
+}
+
+pub fn get_os() -> OperatingSystem {
+    if cfg!(target_os = "windows") {
+        Windows
+    } else if cfg!(target_os = "macos") {
+        MacOS
+    } else if cfg!(target_os = "linux") {
+        Linux
+    } else {
+        Unknown
+    }
+}
+
+pub fn get_os_str() -> &'static str {
+    match get_os() {
+        Windows => "windows",
+        MacOS => "macos",
+        Linux => "linux",
+        Unknown => "unknown",
+    }
+}
+
+pub fn get_ua_platform() -> &'static str {
+    if cfg!(target_os = "windows") {
+        "Win"
+    } else if cfg!(target_os = "macos") {
+        "Mac"
+    } else if cfg!(target_os = "linux") {
+        "Linux"
+    } else {
+        "Unknown"
+    }
+}
+
+pub fn get_ua_arch() -> &'static str {
+    if cfg!(target_arch = "x86_64") {
+        "x86_64"
+    } else if cfg!(target_arch = "x86") {
+        "i386"
+    } else if cfg!(target_arch = "arm") {
+        "ARM"
+    } else if cfg!(target_arch = "aarch64") {
+        "ARM64"
+    } else {
+        "Unknown"
+    }
+}