// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

//! Set your Tauri application as the default handler for a URL, or check which URL(s) it was
//! opened with.
//!
//! On Windows and Linux, protocol schemes can additionally be registered and unregistered at
//! runtime with [`DeepLink::register`] and [`DeepLink::unregister`]. On macOS, Android and iOS
//! the schemes declared in the Tauri configuration are registered at build time instead, so
//! calling those methods returns [`Error::UnsupportedPlatform`].

use tauri::{
    AppHandle, EventId, Listener, Manager, Runtime,
    plugin::{Builder, PluginApi, TauriPlugin},
};

mod commands;
mod config;
mod error;

pub use error::{Error, Result};

#[cfg(target_os = "android")]
const PLUGIN_IDENTIFIER: &str = "app.tauri.deep_link";

fn init_deep_link<R: Runtime>(
    app: &AppHandle<R>,
    api: PluginApi<R, Option<config::Config>>,
) -> crate::Result<DeepLink<R>> {
    #[cfg(target_os = "android")]
    {
        let _api = api;

        use tauri::{
            Emitter,
            ipc::{Channel, InvokeResponseBody},
        };

        let handle = _api.register_android_plugin(PLUGIN_IDENTIFIER, "DeepLinkPlugin")?;

        #[derive(serde::Deserialize)]
        struct Event {
            url: String,
        }

        let app_handle = app.clone();
        handle.run_mobile_plugin::<()>(
            "setEventHandler",
            imp::EventHandler {
                handler: Channel::new(move |event| {
                    let url = match event {
                        InvokeResponseBody::Json(payload) => {
                            serde_json::from_str::<Event>(&payload)
                                .ok()
                                .map(|payload| payload.url)
                        }
                        _ => None,
                    };

                    let _ = app_handle.emit("deep-link://new-url", vec![url]);

                    Ok(())
                }),
            },
        )?;

        Ok(DeepLink {
            app: app.clone(),
            plugin_handle: handle,
        })
    }

    #[cfg(target_os = "ios")]
    return Ok(DeepLink {
        app: app.clone(),
        current: Default::default(),
        config: api.config().clone(),
    });

    #[cfg(desktop)]
    {
        let args = std::env::args();
        let deep_link = DeepLink {
            app: app.clone(),
            current: Default::default(),
            config: api.config().clone(),
        };
        deep_link.handle_cli_arguments(args);

        Ok(deep_link)
    }
}

#[cfg(target_os = "android")]
mod imp {
    use tauri::{AppHandle, Runtime, ipc::Channel, plugin::PluginHandle};

    use serde::{Deserialize, Serialize};

    #[derive(Serialize)]
    #[serde(rename_all = "camelCase")]
    pub struct EventHandler {
        pub handler: Channel,
    }

    #[derive(Debug, Deserialize)]
    #[serde(rename_all = "camelCase")]
    pub struct GetCurrentResponse {
        pub url: Option<url::Url>,
    }

    /// Access to the deep-link APIs.
    pub struct DeepLink<R: Runtime> {
        pub(crate) app: AppHandle<R>,
        pub(crate) plugin_handle: PluginHandle<R>,
    }

    impl<R: Runtime> DeepLink<R> {
        /// Get the current URLs that triggered the deep link. Use this on app load to check whether your app was started via a deep link.
        ///
        /// ## Platform-specific:
        ///
        /// - **Windows / Linux**: This function reads the command line arguments and checks if there's only one value, which must be an URL with scheme matching one of the configured values.
        ///   Note that you must manually check the arguments when registering deep link schemes dynamically with [`Self::register`].
        ///   Additionally, the deep link might have been provided as a CLI argument so you should check if its format matches what you expect.
        pub fn get_current(&self) -> crate::Result<Option<Vec<url::Url>>> {
            self.plugin_handle
                .run_mobile_plugin::<GetCurrentResponse>("getCurrent", ())
                .map(|v| v.url.map(|url| vec![url]))
                .map_err(Into::into)
        }

        /// Register the app as the default handler for the specified protocol.
        ///
        /// - `protocol`: The name of the protocol without `://`. For example, if you want your app to handle `tauri://` links, call this method with `tauri` as the protocol.
        ///
        /// ## Platform-specific:
        ///
        /// - **macOS / Android / iOS**: Unsupported, will return [`Error::UnsupportedPlatform`](`crate::Error::UnsupportedPlatform`).
        pub fn register<S: AsRef<str>>(&self, _protocol: S) -> crate::Result<()> {
            Err(crate::Error::UnsupportedPlatform)
        }

        /// Unregister the app as the default handler for the specified protocol.
        ///
        /// - `protocol`: The name of the protocol without `://`.
        ///
        /// ## Platform-specific:
        ///
        /// - **Linux**: Can only unregister the scheme if it was initially registered with [`register`](`Self::register`). May not work on older distros.
        /// - **macOS / Android / iOS**: Unsupported, will return [`Error::UnsupportedPlatform`](`crate::Error::UnsupportedPlatform`).
        pub fn unregister<S: AsRef<str>>(&self, _protocol: S) -> crate::Result<()> {
            Err(crate::Error::UnsupportedPlatform)
        }

        /// Check whether the app is the default handler for the specified protocol.
        ///
        /// - `protocol`: The name of the protocol without `://`.
        ///
        /// ## Platform-specific:
        ///
        /// - **macOS / Android / iOS**: Unsupported, will return [`Error::UnsupportedPlatform`](`crate::Error::UnsupportedPlatform`).
        pub fn is_registered<S: AsRef<str>>(&self, _protocol: S) -> crate::Result<bool> {
            Err(crate::Error::UnsupportedPlatform)
        }
    }
}

#[cfg(not(target_os = "android"))]
mod imp {
    use std::sync::Mutex;
    #[cfg(target_os = "linux")]
    use std::{
        fs::{File, create_dir_all},
        io::Write,
        process::Command,
    };
    #[cfg(target_os = "linux")]
    use tauri::Manager;
    use tauri::{AppHandle, Runtime};
    #[cfg(windows)]
    use windows_registry::{CLASSES_ROOT, CURRENT_USER, LOCAL_MACHINE};

    /// Access to the deep-link APIs.
    pub struct DeepLink<R: Runtime> {
        pub(crate) app: AppHandle<R>,
        pub(crate) current: Mutex<Option<Vec<url::Url>>>,
        pub(crate) config: Option<crate::config::Config>,
    }

    impl<R: Runtime> DeepLink<R> {
        /// Checks if the provided list of arguments (which should match [`std::env::args`])
        /// contains a deep link argument (for Linux and Windows).
        ///
        /// On Linux and Windows the deep links trigger a new app instance with the deep link URL as its only argument.
        ///
        /// This function does what it can to verify if the argument is actually a deep link, though it could also be a regular CLI argument.
        /// To enhance its checks, we only match deep links against the schemes defined in the Tauri configuration
        /// i.e. dynamic schemes WON'T be processed.
        ///
        /// This function updates the [`Self::get_current`] value and emits a `deep-link://new-url` event.
        #[cfg(desktop)]
        pub fn handle_cli_arguments<S: AsRef<str>, I: Iterator<Item = S>>(&self, mut args: I) {
            use tauri::Emitter;

            let Some(config) = &self.config else {
                return;
            };

            if cfg!(windows) || cfg!(target_os = "linux") {
                args.next(); // bin name
                let arg = args.next();

                let maybe_deep_link = args.next().is_none(); // single argument
                if !maybe_deep_link {
                    return;
                }

                if let Some(url) = arg.and_then(|arg| arg.as_ref().parse::<url::Url>().ok()) {
                    if config.desktop.contains_scheme(&url.scheme().to_string()) {
                        let mut current = self.current.lock().unwrap();
                        current.replace(vec![url.clone()]);
                        let _ = self.app.emit("deep-link://new-url", vec![url]);
                    } else if cfg!(debug_assertions) {
                        tracing::warn!(
                            "argument {url} does not match any configured deep link scheme; skipping it"
                        );
                    }
                }
            }
        }

        /// Get the current URLs that triggered the deep link. Use this on app load to check whether your app was started via a deep link.
        ///
        /// ## Platform-specific:
        ///
        /// - **Windows / Linux**: This function reads the command line arguments and checks if there's only one value, which must be an URL with scheme matching one of the configured values.
        ///   Note that you must manually check the arguments when registering deep link schemes dynamically with [`Self::register`].
        ///   Additionally, the deep link might have been provided as a CLI argument so you should check if its format matches what you expect.
        pub fn get_current(&self) -> crate::Result<Option<Vec<url::Url>>> {
            return Ok(self.current.lock().unwrap().clone());
        }

        /// Registers all schemes defined in the configuration file.
        ///
        /// This is useful to ensure the schemes are registered even if the user did not install the app properly
        /// (e.g. an AppImage that was not properly registered with an AppImage launcher).
        pub fn register_all(&self) -> crate::Result<()> {
            let Some(config) = &self.config else {
                return Ok(());
            };

            for scheme in config.desktop.schemes() {
                self.register(scheme)?;
            }

            Ok(())
        }

        /// Register the app as the default handler for the specified protocol.
        ///
        /// - `protocol`: The name of the protocol without `://`. For example, if you want your app to handle `tauri://` links, call this method with `tauri` as the protocol.
        ///
        /// ## Platform-specific:
        ///
        /// - **Linux**: Needs the `xdg-mime` command available on the system. `update-desktop-database` is used to refresh the MIME cache when available.
        /// - **macOS / Android / iOS**: Unsupported, will return [`Error::UnsupportedPlatform`](`crate::Error::UnsupportedPlatform`).
        pub fn register<S: AsRef<str>>(&self, _protocol: S) -> crate::Result<()> {
            #[cfg(windows)]
            {
                let protocol = _protocol.as_ref();
                let key_base = format!("Software\\Classes\\{protocol}");

                let exe = dunce::simplified(&tauri::utils::platform::current_exe()?)
                    .display()
                    .to_string();

                let key_reg = CURRENT_USER.create(&key_base)?;
                key_reg.set_string("", format!("URL:{} protocol", self.app.config().identifier))?;
                key_reg.set_string("URL Protocol", "")?;

                let icon_reg = CURRENT_USER.create(format!("{key_base}\\DefaultIcon"))?;
                icon_reg.set_string("", format!("{exe},0"))?;

                let cmd_reg = CURRENT_USER.create(format!("{key_base}\\shell\\open\\command"))?;

                cmd_reg.set_string("", format!("\"{exe}\" \"%1\""))?;

                Ok(())
            }

            #[cfg(target_os = "linux")]
            {
                let bin = tauri::utils::platform::current_exe()?;
                let file_name = format!(
                    "{}-handler.desktop",
                    bin.file_name().unwrap().to_string_lossy()
                );
                let appimage = self.app.env().appimage;
                let exec = appimage
                    .clone()
                    .unwrap_or_else(|| bin.into_os_string())
                    .to_string_lossy()
                    .to_string();
                let qualified_exec = format!("\"{}\" %u", exec);

                let target = self.app.path().data_dir()?.join("applications");

                create_dir_all(&target)?;

                let target_file = target.join(&file_name);

                let mime_type = format!("x-scheme-handler/{}", _protocol.as_ref());

                if let Ok(mut desktop_file) = load_desktop_ini(&target_file) {
                    if let Some(section) = desktop_file.section_mut(Some("Desktop Entry")) {
                        // if the mime type is not present, add it to the list
                        let mut change = add_list_entry(section, "MimeType", &mime_type);

                        // if the exec command doesnt match, update to the new one
                        if section.get("Exec") != Some(qualified_exec.as_str()) {
                            section.insert("Exec", qualified_exec);
                            change = true;
                        }

                        // if any property has changed, rewrite the .desktop file
                        if change {
                            desktop_file
                                .write_to_file_policy(&target_file, ini::EscapePolicy::Nothing)?;
                        }
                    }
                } else {
                    let mut file = File::create(target_file)?;
                    file.write_all(
                        format!(
                            include_str!("template.desktop"),
                            name = self
                                .app
                                .config()
                                .product_name
                                .clone()
                                .unwrap_or_else(|| file_name.clone()),
                            qualified_exec = qualified_exec,
                            mime_type = mime_type
                        )
                        .as_bytes(),
                    )?;
                }

                update_desktop_database(&target)?;
                run_command(Command::new("xdg-mime").args([
                    "default",
                    &file_name,
                    mime_type.as_str(),
                ]))?;

                Ok(())
            }

            #[cfg(not(any(windows, target_os = "linux")))]
            Err(crate::Error::UnsupportedPlatform)
        }

        /// Unregister the app as the default handler for the specified protocol.
        ///
        /// - `protocol`: The name of the protocol without `://`.
        ///
        /// ## Platform-specific:
        ///
        /// - **Windows**: Requires admin rights if the protocol is registered on local machine
        ///   (this can happen when registered from the NSIS installer when the install mode is set to both or per machine)
        /// - **Linux**: Can only unregister the scheme if it was initially registered with [`register`](`Self::register`). May not work on older distros.
        /// - **macOS / Android / iOS**: Unsupported, will return [`Error::UnsupportedPlatform`](`crate::Error::UnsupportedPlatform`).
        pub fn unregister<S: AsRef<str>>(&self, _protocol: S) -> crate::Result<()> {
            #[cfg(windows)]
            {
                let protocol = _protocol.as_ref();
                let path = format!("Software\\Classes\\{protocol}");
                if LOCAL_MACHINE.open(&path).is_ok() {
                    LOCAL_MACHINE.remove_tree(&path)?;
                }
                if CURRENT_USER.open(&path).is_ok() {
                    CURRENT_USER.remove_tree(&path)?;
                }
                Ok(())
            }

            #[cfg(target_os = "linux")]
            {
                let file_name = format!(
                    "{}-handler.desktop",
                    tauri::utils::platform::current_exe()?
                        .file_name()
                        .unwrap()
                        .to_string_lossy()
                );
                let scheme = format!("x-scheme-handler/{}", _protocol.as_ref());
                // Drop the defaults first so a failed cache refresh below cannot leave them behind.
                let mimeapps_path = self.app.path().config_dir()?.join("mimeapps.list");
                match std::fs::read_to_string(&mimeapps_path) {
                    Ok(mimeapps) => {
                        if let Some(mimeapps) =
                            remove_mimeapps_association(&mimeapps, &scheme, &file_name)
                        {
                            std::fs::write(&mimeapps_path, mimeapps)?;
                        }
                    }
                    Err(error) if error.kind() == std::io::ErrorKind::NotFound => {}
                    Err(error) => return Err(error.into()),
                }

                let target = self.app.path().data_dir()?.join("applications");
                let desktop_path = target.join(&file_name);
                let mut desktop_changed = false;
                match load_desktop_ini(&desktop_path) {
                    Ok(mut desktop) => {
                        if let Some(section) = desktop.section_mut(Some("Desktop Entry"))
                            && remove_list_entry(section, "MimeType", &scheme)
                        {
                            desktop
                                .write_to_file_policy(&desktop_path, ini::EscapePolicy::Nothing)?;
                            desktop_changed = true;
                        }
                    }
                    Err(ini::Error::Io(error)) if error.kind() == std::io::ErrorKind::NotFound => {}
                    Err(error) => return Err(error.into()),
                }

                // Also clear stale cache entries left by a failed update or a removed desktop file.
                let cached =
                    std::fs::read_to_string(target.join("mimeinfo.cache")).is_ok_and(|cache| {
                        cache.lines().any(|line| {
                            line.split_once('=').is_some_and(|(key, value)| {
                                key == scheme && value.split(';').any(|entry| entry == file_name)
                            })
                        })
                    });
                if desktop_changed || cached {
                    update_desktop_database(&target)?;
                }

                Ok(())
            }

            #[cfg(not(any(windows, target_os = "linux")))]
            Err(crate::Error::UnsupportedPlatform)
        }

        /// Check whether the app is the default handler for the specified protocol.
        ///
        /// - `protocol`: The name of the protocol without `://`.
        ///
        /// ## Platform-specific:
        ///
        /// - **Linux**: Needs the `xdg-mime` command available on the system.
        /// - **macOS / Android / iOS**: Unsupported, will return [`Error::UnsupportedPlatform`](`crate::Error::UnsupportedPlatform`).
        pub fn is_registered<S: AsRef<str>>(&self, _protocol: S) -> crate::Result<bool> {
            #[cfg(windows)]
            {
                let protocol = _protocol.as_ref();
                let Ok(cmd_reg) = CLASSES_ROOT.open(format!("{protocol}\\shell\\open\\command"))
                else {
                    return Ok(false);
                };

                let registered_cmd = cmd_reg.get_string("")?;

                let exe = dunce::simplified(&tauri::utils::platform::current_exe()?)
                    .display()
                    .to_string();

                Ok(registered_cmd == format!("\"{exe}\" \"%1\""))
            }
            #[cfg(target_os = "linux")]
            {
                let file_name = format!(
                    "{}-handler.desktop",
                    tauri::utils::platform::current_exe()?
                        .file_name()
                        .unwrap()
                        .to_string_lossy()
                );

                let output = Command::new("xdg-mime")
                    .args([
                        "query",
                        "default",
                        &format!("x-scheme-handler/{}", _protocol.as_ref()),
                    ])
                    .output()
                    .inspect_err(crate::error::inspect_command_error("xdg-mime"))?;

                // xdg-utils exits with 4 ("action failed") when no default handler exists.
                if output.status.code() == Some(4) {
                    return Ok(false);
                }
                check_command_status("xdg-mime", output.status)?;
                // Backends may pad the name or print more lines, so only the first is compared.
                let stdout = String::from_utf8_lossy(&output.stdout);
                Ok(stdout.lines().next().map(str::trim) == Some(file_name.as_str()))
            }

            #[cfg(not(any(windows, target_os = "linux")))]
            Err(crate::Error::UnsupportedPlatform)
        }
    }

    /// Runs the command, failing if it cannot be spawned or exits unsuccessfully.
    #[cfg(target_os = "linux")]
    fn run_command(command: &mut Command) -> std::io::Result<()> {
        let name = command.get_program().to_string_lossy().into_owned();
        command
            .status()
            .and_then(|status| check_command_status(&name, status))
            .inspect_err(crate::error::inspect_command_error(&name))
    }

    /// Refreshes the desktop entry MIME cache. `update-desktop-database` is not installed on
    /// every distro and the cache is only an optimization, so a missing binary is not an error.
    #[cfg(target_os = "linux")]
    fn update_desktop_database(target: &std::path::Path) -> std::io::Result<()> {
        const NAME: &str = "update-desktop-database";
        match Command::new(NAME).arg(target).status() {
            Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
                tracing::warn!(
                    "`{NAME}` not found, skipping MIME database update. \
                     Install `desktop-file-utils` to silence this warning."
                );
                Ok(())
            }
            result => result
                .and_then(|status| check_command_status(NAME, status))
                .inspect_err(crate::error::inspect_command_error(NAME)),
        }
    }

    #[cfg(target_os = "linux")]
    fn check_command_status(
        command: &str,
        status: std::process::ExitStatus,
    ) -> std::io::Result<()> {
        if status.success() {
            Ok(())
        } else {
            Err(std::io::Error::other(format!(
                "OS command `{command}` failed: {status}"
            )))
        }
    }

    /// Loads a desktop entry file keeping its values in desktop-file syntax, so quotes and
    /// escapes (e.g. in `Exec`) survive a rewrite with [`ini::EscapePolicy::Nothing`].
    #[cfg(target_os = "linux")]
    fn load_desktop_ini(path: &std::path::Path) -> Result<ini::Ini, ini::Error> {
        ini::Ini::load_from_file_opt(
            path,
            // rust-ini 0.21.3 added new struct fields
            #[allow(clippy::needless_update)]
            ini::ParseOption {
                enabled_quote: false,
                enabled_escape: false,
                ..Default::default()
            },
        )
    }

    /// Adds `item` to the front of the `;`-separated list in `key`. Returns whether it changed.
    #[cfg(target_os = "linux")]
    fn add_list_entry(section: &mut ini::Properties, key: &str, item: &str) -> bool {
        let value = section.get(key).unwrap_or_default();
        if value.split(';').any(|entry| entry == item) {
            return false;
        }
        let entries = std::iter::once(item)
            .chain(value.split(';').filter(|entry| !entry.is_empty()))
            .collect::<Vec<_>>()
            .join(";");
        section.insert(key, format!("{entries};"));
        true
    }

    /// Removes `item` from the `;`-separated list in `key`, dropping the key once it is empty.
    /// Returns whether it changed.
    #[cfg(target_os = "linux")]
    fn remove_list_entry(section: &mut ini::Properties, key: &str, item: &str) -> bool {
        let Some(remaining) = section
            .get(key)
            .and_then(|value| remove_from_list(value, item))
        else {
            return false;
        };
        if remaining.is_empty() {
            section.remove(key);
        } else {
            section.insert(key, remaining);
        }
        true
    }

    /// Returns the `;`-separated `list` without `item`, or `None` if it does not contain it.
    #[cfg(target_os = "linux")]
    fn remove_from_list(list: &str, item: &str) -> Option<String> {
        if !list.split(';').any(|entry| entry == item) {
            return None;
        }
        let remaining = list
            .split(';')
            .filter(|entry| !entry.is_empty() && *entry != item)
            .collect::<Vec<_>>()
            .join(";");
        Some(if remaining.is_empty() {
            remaining
        } else {
            format!("{remaining};")
        })
    }

    /// Removes `desktop_file` from the `mime_type` associations of a `mimeapps.list`.
    /// Edits it line by line so the user's comments and formatting survive.
    /// Returns `None` if nothing changed.
    #[cfg(target_os = "linux")]
    fn remove_mimeapps_association(
        mimeapps: &str,
        mime_type: &str,
        desktop_file: &str,
    ) -> Option<String> {
        let mut group = "";
        let mut changed = false;
        let mut out = String::with_capacity(mimeapps.len());
        for line in mimeapps.split_inclusive('\n') {
            let trimmed = line.trim();
            if let Some(name) = trimmed.strip_prefix('[').and_then(|l| l.strip_suffix(']')) {
                group = name;
            } else if matches!(group, "Default Applications" | "Added Associations")
                && let Some((key, value)) = trimmed.split_once('=')
                && key.trim_end() == mime_type
                && let Some(remaining) = remove_from_list(value.trim_start(), desktop_file)
            {
                changed = true;
                if !remaining.is_empty() {
                    out.push_str(&format!("{key}={remaining}"));
                    if line.ends_with('\n') {
                        out.push('\n');
                    }
                }
                continue;
            }
            out.push_str(line);
        }
        changed.then_some(out)
    }
}

pub use imp::DeepLink;
use url::Url;

/// Extensions to [`tauri::App`], [`tauri::AppHandle`], [`tauri::WebviewWindow`], [`tauri::Webview`] and [`tauri::Window`] to access the deep-link APIs.
pub trait DeepLinkExt<R: Runtime> {
    /// Returns a reference to the [`DeepLink`] API.
    fn deep_link(&self) -> &DeepLink<R>;
}

impl<R: Runtime, T: Manager<R>> crate::DeepLinkExt<R> for T {
    fn deep_link(&self) -> &DeepLink<R> {
        self.state::<DeepLink<R>>().inner()
    }
}

/// Event that is triggered when the app was requested to open a new URL.
///
/// Typed [`tauri::Event`].
pub struct OpenUrlEvent {
    id: EventId,
    urls: Vec<Url>,
}

impl OpenUrlEvent {
    /// The event ID which can be used to stop listening to the event via [`tauri::Listener::unlisten`].
    pub fn id(&self) -> EventId {
        self.id
    }

    /// The event URLs.
    pub fn urls(self) -> Vec<Url> {
        self.urls
    }
}

impl<R: Runtime> DeepLink<R> {
    /// Helper function for the `deep-link://new-url` event to run a function each time the protocol is triggered while the app is running.
    ///
    /// Use `get_current` on app load to check whether your app was started via a deep link.
    pub fn on_open_url<F: Fn(OpenUrlEvent) + Send + Sync + 'static>(&self, f: F) -> EventId {
        self.app.listen("deep-link://new-url", move |event| {
            if let Ok(urls) = serde_json::from_str(event.payload()) {
                f(OpenUrlEvent {
                    id: event.id(),
                    urls,
                })
            }
        })
    }
}

/// Initializes the plugin.
pub fn init<R: Runtime>() -> TauriPlugin<R, Option<config::Config>> {
    Builder::new("deep-link")
        .invoke_handler(tauri::generate_handler![
            commands::get_current,
            commands::register,
            commands::unregister,
            commands::is_registered
        ])
        .setup(|app, api| {
            app.manage(init_deep_link(app, api)?);
            Ok(())
        })
        .on_event(|_app, _event| {
            #[cfg(any(target_os = "macos", target_os = "ios"))]
            if let tauri::RunEvent::Opened { urls } = _event {
                use tauri::Emitter;

                let _ = _app.emit("deep-link://new-url", urls);
                _app.state::<DeepLink<R>>()
                    .current
                    .lock()
                    .unwrap()
                    .replace(urls.clone());
            }
        })
        .build()
}