feat(support-info): add app support information

src-tauri/src/commands/support_info.rs

@@ -0,0 +1,232 @@
+use serde::Serialize;
+
+#[derive(Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct AppSupportInfo {
+    pub app_version: String,
+    pub runtime: &'static str,
+    pub os_name: String,
+    pub os_version: Option<String>,
+    pub arch: String,
+}
+
+#[tauri::command]
+pub async fn get_app_support_info() -> AppSupportInfo {
+    current_app_support_info()
+}
+
+pub(crate) fn current_app_support_info() -> AppSupportInfo {
+    AppSupportInfo {
+        app_version: env!("CARGO_PKG_VERSION").to_string(),
+        runtime: "desktop",
+        os_name: os_name(),
+        os_version: os_version(),
+        arch: std::env::consts::ARCH.to_string(),
+    }
+}
+
+pub(crate) fn format_support_info_for_native_about() -> String {
+    let info = current_app_support_info();
+    let operating_system = format_operating_system(&info);
+
+    ["Desktop".to_string(), unknown_if_empty(&operating_system), unknown_if_empty(&info.arch)].join(" • ")
+}
+
+pub(crate) fn format_support_info_for_clipboard() -> String {
+    let info = current_app_support_info();
+    let operating_system = format_operating_system(&info);
+
+    [
+        format!("DBX Version: {}", normalize_app_version(&info.app_version)),
+        "Runtime: Desktop".to_string(),
+        format!("Operating System: {}", unknown_if_empty(&operating_system)),
+        format!("Architecture: {}", unknown_if_empty(&info.arch)),
+    ]
+    .join("\n")
+}
+
+fn format_operating_system(info: &AppSupportInfo) -> String {
+    let operating_system = [Some(info.os_name.as_str()), info.os_version.as_deref()]
+        .into_iter()
+        .flatten()
+        .filter(|part| !part.trim().is_empty())
+        .collect::<Vec<_>>()
+        .join(" ");
+    operating_system
+}
+
+fn normalize_app_version(version: &str) -> String {
+    let trimmed = version.trim();
+    if trimmed.is_empty() {
+        return "Unknown".to_string();
+    }
+    if trimmed.starts_with('v') || trimmed.starts_with('V') {
+        format!("v{}", &trimmed[1..])
+    } else {
+        format!("v{trimmed}")
+    }
+}
+
+fn unknown_if_empty(value: &str) -> String {
+    let trimmed = value.trim();
+    if trimmed.is_empty() {
+        "Unknown".to_string()
+    } else {
+        trimmed.to_string()
+    }
+}
+
+fn os_name() -> String {
+    platform_product_name().unwrap_or_else(|| std::env::consts::OS.to_string())
+}
+
+fn os_version() -> Option<String> {
+    platform_product_version()
+}
+
+#[cfg(target_os = "macos")]
+fn platform_product_name() -> Option<String> {
+    command_first_line("sw_vers", &["-productName"])
+}
+
+#[cfg(target_os = "macos")]
+fn platform_product_version() -> Option<String> {
+    command_first_line("sw_vers", &["-productVersion"])
+}
+
+#[cfg(target_os = "windows")]
+fn platform_product_name() -> Option<String> {
+    Some("Windows".to_string())
+}
+
+#[cfg(target_os = "windows")]
+fn platform_product_version() -> Option<String> {
+    command_first_line("cmd", &["/C", "ver"])
+        .map(|line| line.trim_matches(|ch| ch == '\r' || ch == '\n').trim().to_string())
+}
+
+#[cfg(target_os = "linux")]
+fn platform_product_name() -> Option<String> {
+    linux_os_release_value("/etc/os-release", "PRETTY_NAME")
+}
+
+#[cfg(target_os = "linux")]
+fn platform_product_version() -> Option<String> {
+    linux_os_release_value("/etc/os-release", "VERSION_ID")
+}
+
+#[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
+fn platform_product_name() -> Option<String> {
+    None
+}
+
+#[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
+fn platform_product_version() -> Option<String> {
+    None
+}
+
+#[cfg(any(target_os = "macos", target_os = "windows"))]
+fn command_first_line(command: &str, args: &[&str]) -> Option<String> {
+    let output = std::process::Command::new(command).args(args).output().ok()?;
+    if !output.status.success() {
+        return None;
+    }
+    String::from_utf8_lossy(&output.stdout).lines().map(str::trim).find(|line| !line.is_empty()).map(ToOwned::to_owned)
+}
+
+#[cfg(target_os = "linux")]
+fn linux_os_release_value(path: &str, key: &str) -> Option<String> {
+    let content = std::fs::read_to_string(path).ok()?;
+    parse_os_release_value(&content, key)
+}
+
+#[cfg(any(target_os = "linux", test))]
+fn parse_os_release_value(content: &str, key: &str) -> Option<String> {
+    for line in content.lines() {
+        let line = line.trim();
+        if line.is_empty() || line.starts_with('#') {
+            continue;
+        }
+        let Some((name, value)) = line.split_once('=') else {
+            continue;
+        };
+        if name != key {
+            continue;
+        }
+        return Some(unquote_os_release_value(value.trim()));
+    }
+    None
+}
+
+#[cfg(any(target_os = "linux", test))]
+fn unquote_os_release_value(value: &str) -> String {
+    let quoted = value
+        .strip_prefix('"')
+        .and_then(|inner| inner.strip_suffix('"'))
+        .or_else(|| value.strip_prefix('\'').and_then(|inner| inner.strip_suffix('\'')));
+    let Some(inner) = quoted else {
+        return value.to_string();
+    };
+    inner.replace("\\\"", "\"").replace("\\'", "'").replace("\\\\", "\\")
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{
+        format_support_info_for_clipboard, format_support_info_for_native_about, normalize_app_version,
+        parse_os_release_value, unknown_if_empty, unquote_os_release_value,
+    };
+
+    #[test]
+    fn normalizes_app_version_for_support_info() {
+        assert_eq!(normalize_app_version("0.5.50"), "v0.5.50");
+        assert_eq!(normalize_app_version("v0.5.50"), "v0.5.50");
+        assert_eq!(normalize_app_version("V0.5.50"), "v0.5.50");
+        assert_eq!(normalize_app_version(""), "Unknown");
+    }
+
+    #[test]
+    fn formats_unknown_for_empty_support_info_values() {
+        assert_eq!(unknown_if_empty(""), "Unknown");
+        assert_eq!(unknown_if_empty(" aarch64 "), "aarch64");
+    }
+
+    #[test]
+    fn formats_native_about_support_info_compactly() {
+        let text = format_support_info_for_native_about();
+        assert!(text.contains("Desktop"));
+        assert!(!text.contains("DBX Version:"));
+        assert!(!text.contains('\n'));
+    }
+
+    #[test]
+    fn formats_clipboard_support_info_with_labels() {
+        let text = format_support_info_for_clipboard();
+        assert!(text.contains("DBX Version:"));
+        assert!(text.contains("Runtime:"));
+        assert!(text.contains("Operating System:"));
+        assert!(text.contains("Architecture:"));
+    }
+
+    #[test]
+    fn parses_linux_os_release_values() {
+        let content = r#"
+NAME="Ubuntu"
+VERSION_ID="24.04"
+PRETTY_NAME="Ubuntu 24.04.1 LTS"
+"#;
+
+        assert_eq!(parse_os_release_value(content, "PRETTY_NAME").as_deref(), Some("Ubuntu 24.04.1 LTS"));
+        assert_eq!(parse_os_release_value(content, "VERSION_ID").as_deref(), Some("24.04"));
+    }
+
+    #[test]
+    fn returns_none_for_missing_linux_os_release_value() {
+        assert_eq!(parse_os_release_value("NAME=Ubuntu\n", "PRETTY_NAME"), None);
+    }
+
+    #[test]
+    fn unquotes_linux_os_release_escapes() {
+        assert_eq!(unquote_os_release_value(r#""A \"quoted\" value""#), "A \"quoted\" value");
+    }
+}