daat-locus 0.4.0

A long-running local agent runtime with memory, workflows, apps, and sleep-time self-improvement.
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use std::io;

#[cfg(not(target_os = "windows"))]
use std::process::Command;

pub fn open_url(url: &str) -> io::Result<()> {
    #[cfg(target_os = "windows")]
    {
        open_url_windows(url)
    }

    #[cfg(target_os = "macos")]
    {
        Command::new("open").arg(url).spawn()?;
        Ok(())
    }

    #[cfg(all(unix, not(target_os = "macos")))]
    {
        Command::new("xdg-open").arg(url).spawn()?;
        Ok(())
    }
}

#[cfg(target_os = "windows")]
fn open_url_windows(url: &str) -> io::Result<()> {
    use std::ptr;
    use windows_sys::Win32::UI::{Shell::ShellExecuteW, WindowsAndMessaging::SW_SHOWNORMAL};

    let operation = wide_null("open");
    let target = wide_null(url);
    let result = unsafe {
        ShellExecuteW(
            ptr::null_mut(),
            operation.as_ptr(),
            target.as_ptr(),
            ptr::null(),
            ptr::null(),
            SW_SHOWNORMAL,
        )
    } as isize;

    if result <= 32 {
        let os_error = i32::try_from(result).unwrap_or(i32::MIN);
        Err(io::Error::from_raw_os_error(os_error))
    } else {
        Ok(())
    }
}

#[cfg(target_os = "windows")]
fn wide_null(value: &str) -> Vec<u16> {
    use std::{ffi::OsStr, os::windows::ffi::OsStrExt};

    OsStr::new(value).encode_wide().chain(Some(0)).collect()
}