fix: libpaket: improve decode-error string

Cargo.toml

@@ -6,9 +6,19 @@ members = [
 	"paket",
 ]
 
-
 [workspace.package]
 authors = ["Jane Rachinger <libpaket@j4ne.de>"]
 edition = "2021"
 license = "AGPL-3.0-only"
 version = "0.1.0"
+
+[workspace.dependencies]
+secrecy = { version = "0.10", features = ["serde"] }
+reqwest = { version = "0.12", features = ["json", "cookies", "gzip", "http2"] }
+serde = { version = "1.0.195", features = ["derive"] }
+serde_json = "1.0.111"
+uuid = { version = "1.7.0", features = ["v4"] }
+relm4 = { git = "https://github.com/Relm4/Relm4.git", features = [
+    "libadwaita",
+    "macros",
+]  }

icons.toml

@@ -1,3 +1,3 @@
 app_id = "de.j4ne.Paket"
 
-icons = ["plus", "minus", "package-x-generic", "mail", "loupe-large", "person", "copy"]
+icons = ["plus", "minus", "package-x-generic", "mail", "loupe-large", "person", "copy", "qr-code-scanner"] 

libpaket/Cargo.toml

@@ -14,10 +14,10 @@ num_enum = { version = "0.7", optional = true }
 # TODO: Consolidate?
 rand = "0.8.5"
 random-string = "1.1.0"
-reqwest = { version = "0.12", features = ["json", "cookies", "gzip", "http2"] }
+reqwest = { workspace = true }
-secrecy = { version = "0.8.0", features = ["serde"] }
+secrecy = { workspace = true}
-serde = { version = "1.0.195", features = ["derive"] }
+serde = { workspace = true }
-serde_json = "1.0.111"
+serde_json = { workspace = true }
 serde_repr = { version = "0.1.18", optional = true }
 serde_ignored = "0.1"
 url = "2.5.0"
@@ -28,8 +28,8 @@ base64 = "0.22"
 # sha2 also used in briefankuendigung and packstation_register_regtoken
 sha2 = "0.10.8"
 urlencoding = "2.1.3"
+uuid = { workspace = true, features = ["serde"], optional = true }
 
-uuid = { version = "1.7.0", features = ["v4", "serde"], optional = true }
 serde_newtype = "0.1.1"
 thiserror = "1.0.56"
 

libpaket/src/lib.rs

@@ -41,7 +41,7 @@ pub enum LibraryError {
     Unauthorized,
     #[error("invalid argument: {0}")]
     InvalidArgument(String),
-    #[error("internal error, unable to decode: {0}")]
+    #[error("unable to decode: {0}")]
     DecodeError(String),
     #[error("upstream api was changed. not continuing")]
     APIChange,

libpaket/src/locker/crypto.rs

@@ -1,41 +1,53 @@
 use base64::{engine::general_purpose, Engine as _};
-use rand::prelude::*;
-use uuid::Uuid;
-use ed25519_dalek::SigningKey;
 use ed25519_dalek::Signer;
+use ed25519_dalek::SigningKey;
+use rand::prelude::*;
+use secrecy::zeroize::Zeroize;
+use secrecy::ExposeSecret;
+use secrecy::SecretBox;
+use uuid::Uuid;
 
-
+#[derive(Debug)]
 pub struct CustomerKeySeed {
     pub postnumber: String,
-    pub seed: Seed,
+    pub seed: SecretBox<Seed>,
     pub uuid: Uuid,
     pub device_id: Option<String>,
 }
 
-pub struct Seed {
+impl Zeroize for CustomerKeySeed {
-    bytes: Vec<u8>,
+    fn zeroize(&mut self) {
+        self.postnumber.zeroize();
+        self.seed.zeroize();
+        self.uuid.into_bytes().zeroize();
+        self.device_id.zeroize();
+    }
+}
+
+pub struct Seed(Vec<u8>);
+impl Zeroize for Seed {
+    fn zeroize(&mut self) {
+        self.0.zeroize();
+    }
+}
+
+impl From<Vec<u8>> for Seed {
+    fn from(value: Vec<u8>) -> Self {
+        assert_eq!(value.len(), 32);
+        Seed(value)
+    }
 }
 
 impl Seed {
-    pub(self) fn from_bytes(bytes: Vec<u8>) -> Self {
-        assert_eq!(bytes.len(), 32);
-        Seed {
-            bytes: bytes
-        }
-    }
-
     pub fn random() -> Self {
         let mut rng = rand::thread_rng();
-
         let mut bytes: Vec<u8> = vec![0; 32];
-
         rng.fill_bytes(bytes.as_mut_slice());
-
+        Seed (bytes)
-        Seed { bytes: bytes }
     }
 
     pub fn as_bytes(&self) -> &[u8; 32] {
-        (&self.bytes[..]).try_into().unwrap()
+        (&self.0[..]).try_into().unwrap()
     }
 }
 
@@ -43,7 +55,7 @@ impl CustomerKeySeed {
     pub fn new(postnumber: String) -> Self {
         CustomerKeySeed {
             postnumber,
-            seed: Seed::random(),
+            seed: SecretBox::new(Box::new(Seed::random())),
             uuid: uuid::Uuid::new_v4(),
             device_id: None,
         }
@@ -52,7 +64,7 @@ impl CustomerKeySeed {
     pub fn from(postnumber: &String, seed: Vec<u8>, uuid: &Uuid, device_id: String) -> Self {
         CustomerKeySeed {
             postnumber: postnumber.clone(),
-            seed: Seed::from_bytes(seed),
+            seed: SecretBox::new(Box::new(Seed::from(seed))),
             uuid: uuid.clone(),
             device_id: Some(device_id),
         }
@@ -65,17 +77,15 @@ impl CustomerKeySeed {
     }
 
     pub(crate) fn sign(&self, message: &[u8]) -> String {
-        let signing_key = SigningKey::from_bytes(self.seed.as_bytes());
+        let signing_key = SigningKey::from_bytes(self.seed.expose_secret().as_bytes());
-
         let signature = signing_key.sign(message);
-
         let sig_str = general_purpose::STANDARD.encode(signature.to_bytes());
 
         format!("{}.{}", self.uuid.to_string(), sig_str)
     }
 
     pub(crate) fn get_public_key(&self) -> String {
-        let signing_key = SigningKey::from_bytes(self.seed.as_bytes());
+        let signing_key = SigningKey::from_bytes(self.seed.expose_secret().as_bytes());
         let public_bytes = signing_key.verifying_key().to_bytes();
         let public_str = general_purpose::STANDARD.encode(public_bytes);
 

libpaket/src/locker/regtoken.rs

@@ -4,8 +4,11 @@ use sha2::Sha256;
 
 use crate::{LibraryResult, LibraryError};
 
-pub struct RegToken {
+pub struct RegToken(Vec<u8>);
-    token: Vec<u8>,
+impl secrecy::zeroize::Zeroize for RegToken {
+    fn zeroize(&mut self) {
+        self.0.zeroize();
+    }
 }
 
 impl RegToken {
@@ -32,15 +35,15 @@ impl RegToken {
             token.extend(vec![0; 32 - token.len()].iter())
         }
 
-        Ok(RegToken { token })
+        Ok(RegToken(token))
     }
 
     pub fn customer_password(&self) -> String {
-        general_purpose::STANDARD.encode(&self.token[32..])
+        general_purpose::STANDARD.encode(&self.0[32..])
     }
 
     pub fn hmac(&self) -> SimpleHmac<Sha256> {
-        let mac = SimpleHmac::<Sha256>::new_from_slice(&self.token[0..32])
+        let mac = SimpleHmac::<Sha256>::new_from_slice(&self.0[0..32])
             .expect("HMAC can take key of any size");
 
         mac

paket/Cargo.toml

@@ -7,14 +7,19 @@ version.workspace = true
 
 [dependencies]
 # using git version, for https://github.com/Relm4/Relm4/pull/677
-relm4 = { version = "0.9", features = [ "libadwaita", "macros" ], git = "https://github.com/Relm4/Relm4.git" }
+relm4 = { workspace = true }
-relm4-icons = { version = "0.9", git = "https://github.com/Relm4/icons.git" }
+relm4-icons = { version = "0.9" }
 tracker = "0.2"
-adw = {package = "libadwaita", version = "0.7", features = [ "v1_6" ]}
+adw = { package = "libadwaita", version = "0.7", features = ["v1_6"] }
+aperture = "0.7"
 webkit = { package = "webkit6", version = "0.4" }
-reqwest = "0.12"
 libpaket = { path = "../libpaket" }
 glycin = { version = "2.0.0-beta", features = ["gdk4"] }
 oo7 = { version = "0.3" }
 futures = "0.3"
-gtk = { package = "gtk4", version = "0.9", features = ["v4_16"]}
+gtk = { package = "gtk4", version = "0.9", features = ["v4_16"] }
+reqwest = { workspace = true }
+secrecy = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+uuid = { workspace = true }

paket/src/account.rs

@@ -37,6 +37,7 @@ pub enum AccountInput {
 pub enum AccountServices {
     Advices,
     SendungVerfolgung,
+    PackstationAvailable,
 }
 
 #[derive(Debug)]
@@ -206,9 +207,26 @@ impl Component for AccountView {
             }
             AccountCmd::GotCustomerDataFull(data) => match data {
                 Ok(data) => {
+                    if let Some(services) = &data.requested_services {
+                        for service in services {
+                            match service {
+                                libpaket::stammdaten::CustomerDataService::Packstation => {
+                                    sender.output(AccountOutput::HaveService(
+                                        AccountServices::PackstationAvailable,
+                                    ))
+                                    .unwrap();
+                                }
+                                _ => (),
+                            };
+                        }
+                    }
                     for service in &data.common.services {
                         match service {
-                            libpaket::stammdaten::CustomerDataService::Packstation => (),
+                            libpaket::stammdaten::CustomerDataService::Packstation => sender
+                                .output(AccountOutput::HaveService(
+                                    AccountServices::PackstationAvailable,
+                                ))
+                                .unwrap(),
                             libpaket::stammdaten::CustomerDataService::Paketankuendigung => sender
                                 .output(AccountOutput::HaveService(
                                     AccountServices::SendungVerfolgung,

paket/src/bin/paket.rs

@@ -56,31 +56,41 @@ impl AsyncComponent for App {
             #[wrap(Some)]
             set_content = &adw::ViewStack {
                 #[name = "page_loading"]
-                add = &adw::Bin {
+                add = &adw::ToolbarView {
+                    add_top_bar = &adw::HeaderBar {},
+
                     #[wrap(Some)]
-                    set_child = &adw::Spinner {}
+                    set_content = &adw::Bin {
+                        #[wrap(Some)]
+                        set_child = &adw::Spinner {}
+                    }
                 },
 
                 #[local_ref]
                 add = page_login -> adw::Bin {},
-                
+
                 #[local_ref]
-                add = page_ready -> adw::Bin {},
+                add = page_ready -> adw::NavigationView {},
 
                 #[name = "page_error"]
-                add = &adw::Bin {
+                add = &adw::ToolbarView {
-                    #[name = "page_error_status"]
+                    add_top_bar = &adw::HeaderBar {},
+
                     #[wrap(Some)]
-                    set_child = &adw::StatusPage {}
+                    set_content = &adw::Bin {
+                        #[name = "page_error_status"]
+                        #[wrap(Some)]
+                        set_child = &adw::StatusPage {}
+                    }
                 },
 
                 #[track(model.changed(App::state()))]
                 set_visible_child: {
-                    let page: &adw::Bin = match model.state {
+                    let page = match model.state {
-                            AppState::Loading => page_loading.as_ref(),
+                            AppState::Loading => page_loading.widget_ref(),
-                            AppState::RequiresLogin => page_login.as_ref(),
+                            AppState::RequiresLogin => page_login.widget_ref(),
-                            AppState::Ready => page_ready.as_ref(),
+                            AppState::Ready => page_ready.widget_ref(),
-                            AppState::Error => page_error.as_ref(),
+                            AppState::Error => page_error.widget_ref(),
                         };
                     page
                 }
@@ -130,8 +140,8 @@ impl AsyncComponent for App {
         self.reset();
         match message {
             AppInput::AddBreakpoint(breakpoint) => {
-                root.add_breakpoint(breakpoint);  
+                root.add_breakpoint(breakpoint);
-            },
+            }
             AppInput::SwitchToLoading => {
                 self.set_state(AppState::Loading);
             }
@@ -155,8 +165,14 @@ fn convert_login_response(response: LoginOutput) -> AppInput {
     match response {
         LoginOutput::RequiresLogin => AppInput::SwitchToLogin,
         LoginOutput::RequiresLoading => AppInput::SwitchToLoading,
-        LoginOutput::Error(library_error) => AppInput::FatalErr(AppError { short: "Unhandled API error".to_string(), long: library_error.to_string() }),
+        LoginOutput::Error(library_error) => AppInput::FatalErr(AppError {
-        LoginOutput::KeyringError(error) => AppInput::FatalErr(AppError { short: "Keyring usage failed".to_string(), long: error.to_string() }),
+            short: "Unhandled API error".to_string(),
+            long: library_error.to_string(),
+        }),
+        LoginOutput::KeyringError(error) => AppInput::FatalErr(AppError {
+            short: "Keyring usage failed".to_string(),
+            long: error.to_string(),
+        }),
     }
 }
 
@@ -169,7 +185,7 @@ fn convert_ready_response(response: ReadyOutput) -> AppInput {
 
 fn main() {
     RELM_THREADS.set(4).unwrap();
-    gtk::init().unwrap();
+    aperture::init(paket::constants::APP_ID);
     let display = gtk::gdk::Display::default().unwrap();
     let theme = gtk::IconTheme::for_display(&display);
     theme.add_resource_path("/de/j4ne/Paket/icons/");

paket/src/keyring.rs

@@ -0,0 +1,181 @@
+use std::{str::FromStr as _, sync::OnceLock};
+
+use gtk::glib;
+use libpaket::{locker::crypto::CustomerKeySeed, login::RefreshToken, LibraryError};
+use secrecy::{zeroize::Zeroize, ExposeSecret, SecretBox};
+
+pub static KEYRING: OnceLock<oo7::Keyring> = OnceLock::new();
+
+fn get_keyring_base_attribute() -> (&'static str, &'static str) {
+    ("app", crate::constants::APP_ID)
+}
+
+fn get_keyring_attributes_refresh_token() -> Vec<(&'static str, &'static str)> {
+    vec![
+        get_keyring_base_attribute(),
+        ("type", "refresh_token"),
+        ("version", "1"),
+    ]
+}
+
+fn get_keyring_attributes_packstation() -> Vec<(&'static str, &'static str)> {
+    vec![
+        get_keyring_base_attribute(),
+        ("type", "packstation-gerät-secret"),
+        ("version", "1"),
+    ]
+}
+
+pub async fn keyring_delete_all_items() {
+    let keyring = get_keyring();
+
+    let attr1 = get_keyring_attributes_refresh_token();
+    let attr2 = get_keyring_attributes_packstation();
+
+    let _ = futures::join!(keyring.delete(&attr1), keyring.delete(&attr2),);
+}
+
+fn get_keyring<'a>() -> &'a oo7::Keyring {
+    KEYRING.get().unwrap()
+}
+
+pub async fn keyring_get_refresh_token() -> oo7::Result<Option<RefreshToken>> {
+    let items = get_keyring()
+        .search_items(&get_keyring_attributes_refresh_token())
+        .await?;
+
+    if let Some(item) = items.get(0) {
+        if item.is_locked().await? {
+            item.unlock().await?;
+        }
+        let data = item.secret().await.unwrap();
+        Ok(Some(
+            RefreshToken::new(String::from_utf8(data.to_vec()).unwrap()).unwrap(),
+        ))
+    } else {
+        Ok(None)
+    }
+}
+
+pub async fn keyring_set_refresh_token(value: String) -> oo7::Result<()> {
+    get_keyring()
+        .create_item(
+            "Paket: Login credentials",
+            &get_keyring_attributes_refresh_token(),
+            value,
+            true,
+        )
+        .await
+}
+
+#[derive(serde::Serialize, serde::Deserialize, Clone)]
+struct PackstationSecrets {
+    postnumber: String,
+    seed: String,
+    uuid: String,
+    device_id: String,
+}
+
+impl secrecy::SerializableSecret for PackstationSecrets {}
+
+impl Zeroize for PackstationSecrets {
+    fn zeroize(&mut self) {
+        self.device_id.zeroize();
+        self.postnumber.zeroize();
+        self.seed.zeroize();
+        self.uuid.zeroize();
+    }
+}
+
+#[derive(Debug)]
+pub enum KeyringError {
+    OO7(oo7::Error),
+    Libpaket(LibraryError),
+    SerdeJson(serde_json::Error),
+    Uuid(uuid::Error),
+}
+
+type KeyringResult<T> = Result<T, KeyringError>;
+
+impl From<oo7::Error> for KeyringError {
+    fn from(value: oo7::Error) -> Self {
+        KeyringError::OO7(value)
+    }
+}
+
+impl From<LibraryError> for KeyringError {
+    fn from(value: LibraryError) -> Self {
+        KeyringError::Libpaket(value)
+    }
+}
+
+impl From<serde_json::Error> for KeyringError {
+    fn from(value: serde_json::Error) -> Self {
+        Self::SerdeJson(value)
+    }
+}
+
+impl From<uuid::Error> for KeyringError {
+    fn from(value: uuid::Error) -> Self {
+        KeyringError::Uuid(value)
+    }
+}
+
+pub async fn keyring_get_packstation() -> KeyringResult<Option<CustomerKeySeed>> {
+    let items = get_keyring()
+        .search_items(&get_keyring_attributes_packstation())
+        .await?;
+
+    if let Some(item) = items.get(0) {
+        if item.is_locked().await? {
+            item.unlock().await?;
+        }
+        let data = item.secret().await.unwrap();
+        let data = serde_json::from_slice::<SecretBox<PackstationSecrets>>(data.as_slice())?;
+        let data = data.expose_secret();
+
+        let uuid = uuid::Uuid::from_str(data.uuid.as_str())?;
+        let seed = glib::base64_decode(&data.seed);
+        Ok(Some(CustomerKeySeed::from(
+            &data.postnumber,
+            seed,
+            &uuid,
+            data.device_id.clone(),
+        )))
+    } else {
+        Ok(None)
+    }
+}
+
+pub async fn keyring_set_packstation(data: &CustomerKeySeed) -> KeyringResult<()> {
+    if data.device_id.is_none() {
+        return Ok(());
+    }
+    let seed = secrecy::SecretString::from(Into::<String>::into(glib::base64_encode(
+        data.seed.expose_secret().as_bytes(),
+    )));
+    let uuid = data.uuid.to_string();
+    let device_id = data.device_id.as_ref().unwrap().to_string();
+
+    let secret = SecretBox::new(Box::new(PackstationSecrets {
+        postnumber: data.postnumber.clone(),
+        seed: seed.expose_secret().to_string(),
+        uuid,
+        device_id,
+    }));
+
+    let string = secrecy::SecretString::from(serde_json::to_string_pretty(&secret)?);
+
+    Ok(get_keyring()
+        .create_item(
+            "Paket: Device keys",
+            &get_keyring_attributes_packstation(),
+            string.expose_secret(),
+            true,
+        )
+        .await?)
+}
+
+pub fn keyring_is_available() -> bool {
+    KEYRING.get().is_some()
+}

paket/src/lib.rs

@@ -2,8 +2,11 @@ pub mod account;
 pub mod advice;
 pub mod advices;
 pub mod constants;
+pub mod keyring;
 pub mod login;
+pub mod packstation;
 pub mod ready;
+pub mod scanner;
 pub mod tracking;
 
 pub use login::LoginSharedState;

paket/src/login.rs

@@ -1,9 +1,4 @@
-use std::{
+use std::{cell::RefCell, collections::HashMap, sync::Arc, time::Duration};
-    cell::RefCell,
-    collections::HashMap,
-    sync::{Arc, OnceLock},
-    time::Duration,
-};
 
 use adw::prelude::*;
 use libpaket::{
@@ -17,7 +12,7 @@ use relm4::{
 };
 use webkit::{prelude::WebViewExt, URIRequest, WebContext, WebView};
 
-static KEYRING: OnceLock<oo7::Keyring> = OnceLock::new();
+use crate::keyring::{keyring_get_refresh_token, keyring_is_available, keyring_set_refresh_token};
 
 #[derive(Debug)]
 pub enum LoginInput {
@@ -79,8 +74,19 @@ pub enum LoginCommand {
     NeedsRefresh,
 }
 
-const KEYRING_ATTRIBUTES: [(&str, &str); 2] =
+macro_rules! keyring_result_get {
-    [("app", crate::constants::APP_ID), ("type", "refresh_token")];
+    ($sender: ident, $caller: expr, $code: expr) => {{
+        let res = $caller;
+
+        match res {
+            Ok(value) => Ok($code(value)),
+            Err(err) => {
+                $sender.output(LoginOutput::KeyringError(err)).unwrap();
+                Err(())
+            }
+        }
+    }};
+}
 
 #[relm4::component(async, pub)]
 impl AsyncComponent for Login {
@@ -175,47 +181,24 @@ impl AsyncComponent for Login {
             tracker: 0,
         };
 
-        let result = oo7::Keyring::new().await;
+        let _ = keyring_result_get!(sender, oo7::Keyring::new().await, |keyring| {
-        match result {
+            crate::keyring::KEYRING.set(keyring).unwrap();
-            Ok(keyring) => {
+        });
-                KEYRING.set(keyring).unwrap();
+
-                if let Err(err) = KEYRING.get().unwrap().unlock().await {
+        if keyring_is_available() {
-                    sender
+            let refresh_token =
-                        .output(LoginOutput::KeyringError(err))
+                keyring_result_get!(sender, keyring_get_refresh_token().await, move |value| {
-                        .expect("sender not worky");
+                    return value;
+                });
+            if let Ok(value) = refresh_token {
+                model.refresh_token = value;
+                if model.refresh_token.is_some() {
+                    sender.input(LoginInput::NeedsRefresh);
                 } else {
-                    let keyring = KEYRING.get().unwrap();
+                    sender.input(LoginInput::NeedsLogin);
-                    match keyring
-                        .search_items(&HashMap::from(KEYRING_ATTRIBUTES))
-                        .await
-                    {
-                        Ok(res) => {
-                            if res.len() > 0 {
-                                let item = &res[0];
-                                let refresh_token = item.secret().await.unwrap();
-                                let refresh_token =
-                                    std::str::from_utf8(refresh_token.as_slice()).unwrap();
-                                model.refresh_token =
-                                    Some(RefreshToken::new(refresh_token.to_string()).unwrap());
-                                sender.input(LoginInput::NeedsRefresh);
-                            } else {
-                                sender.input(LoginInput::NeedsLogin);
-                            }
-                        }
-                        Err(err) => {
-                            sender
-                                .output(LoginOutput::KeyringError(err))
-                                .expect("sender not worky");
-                        }
-                    };
                 }
             }
-            Err(err) => {
+        }
-                sender
-                    .output(LoginOutput::KeyringError(err))
-                    .expect("sender not worky");
-            }
-        };
 
         let webcontext = WebContext::builder().build();
         {
@@ -273,7 +256,7 @@ impl AsyncComponent for Login {
                     *token.write() = None;
                 }
                 if let Some(refresh_token) = self.refresh_token.clone() {
-                    sender.command(|out, shutdown| {
+                    sender.command(|_, shutdown| {
                         shutdown
                             .register(async move {
                                 let client = OpenIdClient::new();
@@ -283,10 +266,7 @@ impl AsyncComponent for Login {
                     });
                 }
                 self.refresh_token = None;
-                let keyring = KEYRING.get().unwrap();
+                let _ = crate::keyring::keyring_delete_all_items().await;
-                let _ = keyring
-                    .delete(&HashMap::from([("app", crate::constants::APP_ID)]))
-                    .await;
             }
             LoginInput::NeedsRefresh => {
                 let refresh_token = self.refresh_token.as_ref().unwrap().clone();
@@ -388,27 +368,21 @@ impl Login {
                             .drop_on_shutdown()
                     });
                 }
-                let future = async {
+
-                    self.refresh_token = Some(res.refresh_token);
+                self.refresh_token = Some(res.refresh_token);
-                    let keyring = KEYRING.get().unwrap();
-                    keyring
-                        .create_item(
-                            "Refresh Token",
-                            &HashMap::from(KEYRING_ATTRIBUTES),
-                            self.refresh_token.as_ref().unwrap().to_string(),
-                            true,
-                        )
-                        .await
-                        .unwrap();
-                };
 
                 if !res.id_token.is_expired() {
+                    let _ = keyring_result_get!(
+                        sender,
+                        keyring_set_refresh_token(self.refresh_token.as_ref().unwrap().to_string())
+                            .await,
+                        |_| {}
+                    );
                     let credentials_model = self.shared_id_token.lock().await;
                     let mut credentials_model = credentials_model.write();
 
                     *credentials_model = Some(res.id_token);
                 }
-                future.await;
             }
             Err(res) => {
                 // We disarm the webkit flow/aka breaking the application. We want to reduce invalid requests

paket/src/packstation.rs

@@ -0,0 +1,294 @@
+use libpaket::locker::crypto::CustomerKeySeed;
+use libpaket::locker::register::{APIRegisterError, DeviceMetadata, RegToken};
+use relm4::prelude::*;
+use relm4::{Component, ComponentParts, WidgetRef};
+use secrecy::{ExposeSecret, SecretBox};
+
+use crate::keyring::{keyring_get_packstation, keyring_set_packstation};
+use crate::login::get_id_token;
+use crate::{
+    scanner::{Scanner, ScannerOutput},
+    LoginSharedState,
+};
+use adw::prelude::*;
+
+#[derive(PartialEq, Eq)]
+enum RegisterState {
+    Beginning,
+    Loading,
+}
+
+#[derive(PartialEq)]
+enum State {
+    Nothing,
+    RegisterWizard(RegisterState),
+    Loaded,
+}
+
+#[tracker::track]
+pub struct PackstationView {
+    state: State,
+
+    #[do_not_track]
+    key: Option<CustomerKeySeed>,
+    #[do_not_track]
+    login: LoginSharedState,
+
+    #[do_not_track]
+    scanner: AsyncController<Scanner>,
+}
+
+#[derive(Debug)]
+pub enum PackstationViewInput {
+    Init,
+    GotQrValue(String),
+    Reset,
+}
+
+#[derive(Debug)]
+pub enum PackstationViewOutput {
+    NavigationPage(adw::NavigationPage),
+}
+
+#[derive(Debug)]
+pub enum PackstationViewCommand {
+    GotDeviceCredentials(CustomerKeySeed),
+    GotLibraryError(libpaket::LibraryError),
+    GotAPIRegisterError(APIRegisterError),
+    GotNothing,
+}
+
+#[relm4::component(pub)]
+impl Component for PackstationView {
+    type Init = LoginSharedState;
+    type Input = PackstationViewInput;
+    type Output = PackstationViewOutput;
+    type CommandOutput = PackstationViewCommand;
+
+    view! {
+        #[root]
+        adw::Bin {
+            #[wrap(Some)]
+            set_child = &adw::ViewStack {
+                add = page_loading = &adw::Bin {
+                    #[wrap(Some)]
+                    set_child = &adw::Spinner {}
+                },
+
+                add = page_registration = &adw::ViewStack {
+                    #[name = "registration_page_beginning"]
+                    add = &adw::StatusPage {
+                        set_title: "Register your device",
+                        set_description: Some("Registration is required to interact with parcel lockers\nYou'll need camera access and the letter with the registration qr-code you received. If you don't have one, request the <a href=\"https://www.dhl.de/de/privatkunden/pakete-empfangen/an-einem-abholort-empfangen/packstation/packstation-registrierung.html\">Packstation service</a> and come back later."),
+
+                        #[wrap(Some)]
+                        set_child = &adw::Clamp {
+                            set_maximum_size: 260,
+
+                            #[wrap(Some)]
+                            set_child = &gtk::Button {
+                                add_css_class: relm4::css::SUGGESTED_ACTION,
+                                add_css_class: relm4::css::PILL,
+
+                                #[wrap(Some)]
+                                set_child = &adw::ButtonContent {
+                                    set_label: "Register",
+                                    set_icon_name: relm4_icons::icon_names::QR_CODE_SCANNER,
+                                },
+
+                                connect_clicked[sender = sender.clone()] => move |_| {
+                                    sender.output(PackstationViewOutput::NavigationPage(scanner_page.clone())).unwrap();
+                                },
+                            },
+                        },
+                    },
+
+                    #[name = "registration_page_loading"]
+                    add = &adw::StatusPage {
+                        #[wrap(Some)]
+                        set_paintable = &adw::SpinnerPaintable::new(Some(registration_page_loading.widget_ref())) {},
+
+                        set_title: "Registering your device"
+                    },
+
+                    #[track(model.changed_state())]
+                    set_visible_child?: {
+                        match model.get_state() {
+                            State::RegisterWizard(register_state) => Some(match register_state {
+                                RegisterState::Beginning => registration_page_beginning.widget_ref(),
+                                RegisterState::Loading => registration_page_loading.widget_ref(),
+                            }),
+                            _ => None,
+                        }
+                    }
+                },
+
+                add = page_loaded = &adw::Bin {
+
+                },
+
+                #[track(model.changed_state())]
+                set_visible_child: {
+                    match model.get_state() {
+                        State::Nothing => page_loading.widget_ref(),
+                        State::RegisterWizard(_) => page_registration.widget_ref(),
+                        State::Loaded => page_loaded.widget_ref(),
+                    }
+                },
+            }
+        }
+    }
+
+    fn init(
+        init: Self::Init,
+        root: Self::Root,
+        sender: relm4::ComponentSender<Self>,
+    ) -> ComponentParts<Self> {
+        let scanner = Scanner::builder()
+            .launch(())
+            .forward(sender.input_sender(), convert_scanner_output);
+
+        let model = PackstationView {
+            state: State::Nothing,
+            scanner,
+            login: init,
+            key: None,
+            tracker: 0,
+        };
+
+        let scanner_page = model.scanner.widget().clone();
+        let widgets = view_output!();
+
+        ComponentParts { model, widgets }
+    }
+
+    fn update(
+        &mut self,
+        message: Self::Input,
+        sender: relm4::ComponentSender<Self>,
+        root: &Self::Root,
+    ) {
+        self.reset();
+
+        match message {
+            PackstationViewInput::Init => {
+                self.set_state(State::Nothing);
+                sender.oneshot_command(async {
+                    let value = keyring_get_packstation().await.unwrap();
+                    match value {
+                        Some(value) => PackstationViewCommand::GotDeviceCredentials(value),
+                        None => PackstationViewCommand::GotNothing,
+                    }
+                });
+                self.set_state(State::RegisterWizard(RegisterState::Beginning))
+            }
+            PackstationViewInput::GotQrValue(value) => {
+                self.set_state(State::RegisterWizard(RegisterState::Loading));
+                let reg_token = match RegToken::parse_from_qrcode_uri(value.as_str()) {
+                    Ok(value) => secrecy::SecretBox::new(Box::new(value)),
+                    Err(_) => {
+                        return;
+                    }
+                };
+                let login = self.login.clone();
+                sender.oneshot_command(async move {
+                    match Self::register_with_regtoken(login, reg_token).await {
+                        Ok(value) => match value {
+                            Ok(value) => {
+                                keyring_set_packstation(&value).await.unwrap();
+                                PackstationViewCommand::GotDeviceCredentials(value)
+                            },
+                            Err(err) => todo!(),
+                        },
+                        Err(err) => todo!(),
+                    }
+                });
+            }
+            PackstationViewInput::Reset => {
+                self.set_state(State::Nothing);
+            }
+        }
+    }
+
+    fn update_cmd(
+        &mut self,
+        message: Self::CommandOutput,
+        sender: ComponentSender<Self>,
+        root: &Self::Root,
+    ) {
+        match message {
+            PackstationViewCommand::GotDeviceCredentials(secret_box) => {
+                self.key = Some(secret_box);
+                self.set_state(State::Loaded);
+            }
+            PackstationViewCommand::GotNothing => {
+                self.set_state(State::RegisterWizard(RegisterState::Beginning));
+            },
+            PackstationViewCommand::GotAPIRegisterError(error) => {
+                todo!()
+            },
+            PackstationViewCommand::GotLibraryError(error) => {
+                match error {
+                    libpaket::LibraryError::Unauthorized => todo!(),
+                    libpaket::LibraryError::DecodeError(_) => todo!(),
+                    libpaket::LibraryError::APIChange => todo!(),
+                    libpaket::LibraryError::Deprecated => todo!(),
+
+                    libpaket::LibraryError::InvalidArgument(error) => panic!("{}", error),
+                    libpaket::LibraryError::NetworkFetch => panic!(),
+                }
+            },
+        }
+    }
+}
+
+impl PackstationView {
+    async fn register_with_regtoken(
+        login: LoginSharedState,
+        regtoken: SecretBox<RegToken>,
+    ) -> libpaket::LibraryResult<Result<CustomerKeySeed, APIRegisterError>> {
+        let client = libpaket::StammdatenClient::new();
+        let payload = client
+            .begin_registration(&get_id_token(&login).await.unwrap())
+            .await?;
+
+        let mut customer_key_seed = CustomerKeySeed::new(
+            get_id_token(&login)
+                .await
+                .unwrap()
+                .get_post_number()
+                .to_string(),
+        );
+
+        let res = client
+            .register_by_regtoken(
+                &get_id_token(&login).await.unwrap(),
+                &customer_key_seed,
+                payload,
+                DeviceMetadata {
+                    manufacturer_model: "Manufacturer".into(),
+                    manufacturer_name: "Name".into(),
+                    manufacturer_operating_system: "Android".into(),
+                    name: "Linux Mobile Device".into(),
+                },
+                regtoken.expose_secret(),
+            )
+            .await?;
+
+        Ok(match res {
+            libpaket::locker::register::DeviceRegistrationResponse::Error { id, description } => {
+                Err(id)
+            }
+            libpaket::locker::register::DeviceRegistrationResponse::Okay(device) => {
+                customer_key_seed.set_device_id(device.id);
+                Ok(customer_key_seed)
+            }
+        })
+    }
+}
+
+fn convert_scanner_output(value: ScannerOutput) -> PackstationViewInput {
+    match value {
+        ScannerOutput::CodeDetected(value) => PackstationViewInput::GotQrValue(value),
+    }
+}

paket/src/ready.rs

@@ -2,9 +2,7 @@ use adw::prelude::*;
 use relm4::prelude::*;
 
 use crate::{
-    account::{AccountOutput, AccountServices, AccountView},
+    account::{AccountOutput, AccountServices, AccountView}, advices::{AdvicesView, AdvicesViewInput}, packstation::{PackstationView, PackstationViewInput, PackstationViewOutput}, tracking::{TrackingInput, TrackingOutput, TrackingView}
-    advices::{AdvicesView, AdvicesViewInput},
-    tracking::{TrackingInput, TrackingOutput, TrackingView},
 };
 
 #[tracker::track]
@@ -12,12 +10,15 @@ pub struct Ready {
     logged_in: bool,
     have_service_advices: bool,
     have_service_tracking: bool,
+    have_service_packstation: bool,
 
     #[do_not_track]
     account_component: Controller<AccountView>,
     #[do_not_track]
     advices_component: AsyncController<AdvicesView>,
     #[do_not_track]
+    packstation_component: Controller<PackstationView>,
+    #[do_not_track]
     tracking_component: Controller<TrackingView>,
     #[do_not_track]
     toast_overlay: adw::ToastOverlay,
@@ -39,6 +40,7 @@ pub enum ReadyCmds {
 pub enum ReadyInput {
     LoggedIn,
     LoggedOut,
+    NavigationPageTemp(adw::NavigationPage),
     HaveService(AccountServices),
     ServiceBorked(AccountServices),
 }
@@ -52,73 +54,77 @@ impl Component for Ready {
 
     view! {
         #[root]
-        adw::Bin {
+        &adw::NavigationView {
-            #[wrap(Some)]
+            add = &adw::NavigationPage {
-            set_child = &adw::NavigationView {
+                set_title: "",
-                add = &adw::NavigationPage {
-                    set_title: "",
-
-                    #[wrap(Some)]
-                    set_child = &adw::ToolbarView {
-                        add_top_bar = ready_headerbar = &adw::HeaderBar {
-                            #[wrap(Some)]
-                            set_title_widget = ready_switchertop = &adw::ViewSwitcher{
-                                set_policy: adw::ViewSwitcherPolicy::Wide,
-                                set_stack: Some(&ready_view_stack),
-                            }
-                        },
 
+                #[wrap(Some)]
+                set_child = &adw::ToolbarView {
+                    add_top_bar = ready_headerbar = &adw::HeaderBar {
                         #[wrap(Some)]
-                        set_content = &model.toast_overlay.clone() -> adw::ToastOverlay {
+                        set_title_widget = ready_switchertop = &adw::ViewSwitcher{
-                            #[wrap(Some)]
+                            set_policy: adw::ViewSwitcherPolicy::Wide,
-                            #[name = "ready_view_stack"]
-                            set_child = &adw::ViewStack {
-                                add = &model.advices_component.widget().clone() -> gtk::ScrolledWindow {
-                                    #[track(model.changed_have_service_advices())]
-                                    set_visible: model.have_service_advices,
-
-                                } -> page_advices: adw::ViewStackPage {
-                                    set_title: Some("Mail notification"),
-                                    set_name: Some("page_advices"),
-                                    set_icon_name: Some(relm4_icons::icon_names::MAIL),
-
-                                    #[track(model.changed_have_service_advices())]
-                                    set_visible: model.have_service_advices,
-                                },
-
-                                add = &model.tracking_component.widget().clone() -> adw::ToastOverlay {
-                                    #[track(model.changed_have_service_tracking())]
-                                    set_visible: model.have_service_tracking,
-
-
-                                } -> page_tracking: adw::ViewStackPage {
-                                    set_title: Some("Shipment tracking"),
-                                    set_name: Some("page_tracking"),
-                                    set_icon_name: Some(relm4_icons::icon_names::PACKAGE_X_GENERIC),
-
-                                    #[track(model.changed_have_service_tracking())]
-                                    set_visible: model.have_service_tracking,
-                                },
-
-                                add = &model.account_component.widget().clone() -> adw::Bin {
-                                } -> page_account: adw::ViewStackPage {
-                                    set_title: Some("Account"),
-                                    set_name: Some("page_account"),
-                                    set_icon_name: Some(relm4_icons::icon_names::PERSON)
-                                }
-                            },
-                        },
-
-
-                        add_bottom_bar = ready_switcherbar = &adw::ViewSwitcherBar {
                             set_stack: Some(&ready_view_stack),
                         }
+                    },
+
+                    #[wrap(Some)]
+                    set_content = &model.toast_overlay.clone() -> adw::ToastOverlay {
+                        #[wrap(Some)]
+                        #[name = "ready_view_stack"]
+                        set_child = &adw::ViewStack {
+                            add = &model.advices_component.widget().clone() -> gtk::ScrolledWindow {
+                                #[track(model.changed_have_service_advices())]
+                                set_visible: model.have_service_advices,
+
+                            } -> page_advices: adw::ViewStackPage {
+                                set_title: Some("Mail notification"),
+                                set_name: Some("page_advices"),
+                                set_icon_name: Some(relm4_icons::icon_names::MAIL),
+
+                                #[track(model.changed_have_service_advices())]
+                                set_visible: model.have_service_advices,
+                            },
+
+                            add = &model.tracking_component.widget().clone() -> adw::ToastOverlay {
+                                #[track(model.changed_have_service_tracking())]
+                                set_visible: model.have_service_tracking,
+                            } -> page_tracking: adw::ViewStackPage {
+                                set_title: Some("Shipment tracking"),
+                                set_name: Some("page_tracking"),
+                                set_icon_name: Some(relm4_icons::icon_names::PACKAGE_X_GENERIC),
+
+                                #[track(model.changed_have_service_tracking())]
+                                set_visible: model.have_service_tracking,
+                            },
+
+                            add = &model.packstation_component.widget().clone() -> adw::Bin {
+                                #[track(model.changed_have_service_packstation())]
+                                set_visible: model.have_service_packstation,
+                            } -> page_packstation: adw::ViewStackPage {
+                                set_title: Some("Packstation"),
+                                set_name: Some("page_packstation"),
+
+                                #[track(model.changed_have_service_packstation())]
+                                set_visible: model.have_service_packstation,
+                            },
+
+                            add = &model.account_component.widget().clone() -> adw::Bin {
+                            } -> page_account: adw::ViewStackPage {
+                                set_title: Some("Account"),
+                                set_name: Some("page_account"),
+                                set_icon_name: Some(relm4_icons::icon_names::PERSON)
+                            }
+                        },
+                    },
+
+
+                    add_bottom_bar = ready_switcherbar = &adw::ViewSwitcherBar {
+                        set_stack: Some(&ready_view_stack),
                     }
-                },
+                }
-            }
+            },
-        },
+        }
-
-
     }
 
     fn init(
@@ -130,22 +136,28 @@ impl Component for Ready {
 
         let tracking_component = TrackingView::builder()
             .launch(init.clone())
-            .forward(&sender.input_sender(), convert_tracking_output);
+            .forward(sender.input_sender(), convert_tracking_output);
 
         let account_component = AccountView::builder()
             .launch(init.clone())
-            .forward(&sender.input_sender(), convert_account_output);
+            .forward(sender.input_sender(), convert_account_output);
+
+        let packstation_component = PackstationView::builder()
+            .launch(init.clone())
+            .forward(sender.input_sender(), convert_packstation_output);
 
         let toast_overlay = adw::ToastOverlay::new();
 
         let model = Ready {
             have_service_advices: false,
             have_service_tracking: true,
+            have_service_packstation: false,
             logged_in: false,
 
             account_component,
             advices_component,
             tracking_component,
+            packstation_component,
             toast_overlay,
 
             tracker: 0,
@@ -176,7 +188,7 @@ impl Component for Ready {
         ComponentParts { model, widgets }
     }
 
-    fn update(&mut self, message: Self::Input, sender: ComponentSender<Self>, _: &Self::Root) {
+    fn update(&mut self, message: Self::Input, sender: ComponentSender<Self>, root: &Self::Root) {
         self.reset();
 
         match message {
@@ -195,6 +207,10 @@ impl Component for Ready {
                     self.set_have_service_tracking(true);
                     self.tracking_component.emit(TrackingInput::Search(None))
                 }
+                AccountServices::PackstationAvailable => {
+                    self.set_have_service_packstation(true);
+                    self.packstation_component.emit(PackstationViewInput::Init);
+                }
             },
             ReadyInput::ServiceBorked(service) => match service {
                 AccountServices::Advices => {
@@ -205,7 +221,7 @@ impl Component for Ready {
                             .build(),
                     );
                     self.set_have_service_advices(false);
-                }
+                },
                 AccountServices::SendungVerfolgung => {
                     self.toast_overlay.add_toast(
                         adw::Toast::builder()
@@ -214,8 +230,12 @@ impl Component for Ready {
                             .build(),
                     );
                     self.set_have_service_tracking(false);
-                }
+                },
+                _ => (),
             },
+            ReadyInput::NavigationPageTemp(page) => {
+                root.push(&page);
+            }
         };
 
         if self.changed_logged_in() {
@@ -223,7 +243,11 @@ impl Component for Ready {
                 sender.output(ReadyOutput::Ready).unwrap();
             } else {
                 self.advices_component.emit(AdvicesViewInput::Reset);
+                self.packstation_component.emit(PackstationViewInput::Reset);
                 self.tracking_component.emit(TrackingInput::Reset);
+                self.set_have_service_advices(false);
+                self.set_have_service_tracking(true);
+                self.set_have_service_packstation(false);
             }
         }
     }
@@ -242,3 +266,9 @@ fn convert_account_output(value: AccountOutput) -> ReadyInput {
         AccountOutput::HaveService(service) => ReadyInput::HaveService(service),
     }
 }
+
+fn convert_packstation_output(value: PackstationViewOutput) -> ReadyInput {
+    match value {
+        PackstationViewOutput::NavigationPage(navigation_page) => ReadyInput::NavigationPageTemp(navigation_page),
+    }
+}

paket/src/scanner.rs

@@ -0,0 +1,304 @@
+pub use r#impl::{Scanner, ScannerOutput};
+
+mod r#impl {
+    use adw::prelude::*;
+    use relm4::prelude::*;
+    use relm4::WidgetRef;
+
+    impl Scanner {
+        async fn activate_internal_impl() -> Result<(), ErrorInternal> {
+            let device_provider = aperture::DeviceProvider::instance();
+
+            device_provider.start()?;
+
+            Ok(())
+        }
+
+        async fn activate_internal(&mut self, sender: &AsyncComponentSender<Self>) -> bool {
+            if !aperture::DeviceProvider::instance().started() {
+                match Scanner::activate_internal_impl().await {
+                    Ok(_) => return true,
+                    Err(err) => {
+                        sender.input(ScannerInput::Error(err));
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+    }
+
+    #[derive(PartialEq)]
+    enum State {
+        Nothing,
+        Error,
+        InView,
+    }
+
+    #[tracker::track]
+    pub struct Scanner {
+        state: State,
+        in_activation: bool,
+
+        #[do_not_track]
+        camera: Option<aperture::Camera>,
+        #[do_not_track]
+        view_finder: aperture::Viewfinder,
+    }
+
+    #[derive(Debug)]
+    pub enum ScannerOutput {
+        CodeDetected(String),
+    }
+
+    #[derive(Debug)]
+    pub enum ScannerInput {
+        // Externally
+        Activate,
+        Deactivate,
+
+        Error(ErrorInternal),
+
+        CamaraAdded(aperture::Camera),
+        CamaraRemoved(aperture::Camera),
+        CameraChoosen(aperture::Camera),
+
+        // View
+        TransitionToInView,
+    }
+
+    #[relm4::component(pub, async)]
+    impl SimpleAsyncComponent for Scanner {
+        type Input = ScannerInput;
+        type Output = ScannerOutput;
+        type Init = ();
+
+        view! {
+            #[root]
+            adw::NavigationPage {
+                connect_parent_notify[sender = sender.clone()] => move |page| {
+                    let sender = sender.input_sender();
+                    if page.parent().is_none() {
+                        sender.emit(ScannerInput::Deactivate);
+                    } else {
+                        sender.emit(ScannerInput::Activate);
+                    }
+                },
+
+                #[wrap(Some)]
+                set_child = &adw::ToolbarView {
+                    add_top_bar = &adw::HeaderBar {},
+
+                    #[wrap(Some)]
+                    set_content = &adw::ViewStack {
+                        #[local_ref]
+                        add = &page_view_finder -> aperture::Viewfinder {
+                            set_detect_codes: true,
+
+                            connect_code_detected[sender = sender.clone()] => move |_, code_type, value| {
+                                match code_type {
+                                    aperture::CodeType::Qr => {
+                                        let _ = sender.output(ScannerOutput::CodeDetected(value.to_string()));
+                                    },
+                                    _ => (),
+                                }
+                            },
+
+                            connect_state_notify[sender = sender.clone()] => move |view_finder|{
+                                match view_finder.state() {
+                                    aperture::ViewfinderState::Loading => {},
+                                    aperture::ViewfinderState::Ready => {},
+                                    aperture::ViewfinderState::NoCameras => {
+                                        sender.input(ScannerInput::Deactivate);
+                                    },
+                                    aperture::ViewfinderState::Error => {},
+                                }
+                            }
+                        },
+
+                        #[name = "page_error"]
+                        add = &adw::Bin {
+                            #[wrap(Some)]
+                            set_child = &adw::StatusPage {
+                                set_title: "Error occured",
+                            },
+                        },
+
+                        #[name = "page_no_cameras"]
+                        add = &adw::Bin {
+                            #[wrap(Some)]
+                            set_child = &adw::StatusPage {
+                                set_title: "No cameras detected",
+                            },
+                        },
+
+                        #[track(model.changed_state())]
+                        set_visible_child: {
+                            match model.state {
+                                State::Nothing => page_no_cameras.widget_ref(),
+                                State::InView => page_view_finder.widget_ref(),
+                                State::Error => page_error.widget_ref(),
+                            }
+                        },
+                    },
+                }
+            }
+        }
+
+        async fn init(
+            init: Self::Init,
+            root: Self::Root,
+            sender: relm4::AsyncComponentSender<Self>,
+        ) -> AsyncComponentParts<Self> {
+            let view_finder = aperture::Viewfinder::new();
+
+            let device_provider = aperture::DeviceProvider::instance();
+            {
+                let sender = sender.input_sender().clone();
+                device_provider.connect_camera_removed(move |_, camera| {
+                    let _ = sender.send(ScannerInput::CamaraRemoved(camera.clone()));
+                });
+            }
+            {
+                let sender = sender.input_sender().clone();
+                device_provider.connect_camera_added(move |_, camera| {
+                    let _ = sender.send(ScannerInput::CamaraAdded(camera.clone()));
+                });
+            }
+
+            let model = Scanner {
+                state: State::Nothing,
+                view_finder,
+                camera: None,
+                in_activation: false,
+                tracker: 0,
+            };
+
+            let page_view_finder = model.view_finder.clone();
+
+            let widgets = view_output!();
+
+            AsyncComponentParts { model, widgets }
+        }
+
+        async fn update(
+            &mut self,
+            message: Self::Input,
+            sender: relm4::AsyncComponentSender<Self>,
+        ) {
+            match self.state {
+                State::Error => {
+                    return;
+                }
+                _ => (),
+            }
+            match message {
+                ScannerInput::CamaraRemoved(removed_camera) => {
+                    if let Some(camera) = self.camera.as_ref() {
+                        if removed_camera == *camera {
+                            self.camera = None;
+                            if *self.get_state() == State::InView {
+                                sender.input(ScannerInput::Deactivate);
+                                sender.input(ScannerInput::Activate);
+             z               }
+                        }
+                    }
+                }
+                ScannerInput::CamaraAdded(_) => {
+                    if self.camera.is_none() {
+                        self.view_finder.stop_stream();
+                        self.set_state(State::Nothing);
+                        sender.input(ScannerInput::Activate);
+                    }
+                }
+                ScannerInput::Error(err) => {
+                    println!("error: {:?}", err);
+                    self.set_state(State::Error);
+                }
+                ScannerInput::Activate => {
+                    if self.activate_internal(&sender).await {
+                        sender.input(ScannerInput::TransitionToInView);
+                    }
+                }
+                ScannerInput::Deactivate => {
+                    self.view_finder.stop_stream();
+                    self.set_state(State::Nothing);
+                }
+                ScannerInput::CameraChoosen(camera) => {
+                    self.camera = Some(camera);
+                    self.view_finder.stop_stream();
+                    sender.input(ScannerInput::TransitionToInView);
+                }
+                ScannerInput::TransitionToInView => {
+                    /*
+                     * If we don't have a camera selected, choose one with this pattern:
+                     * - first internal camera that is facing back
+                     * - first external camera
+                     * - first camera that was found
+                     */
+                    let device_provider = aperture::DeviceProvider::instance();
+
+                    if device_provider.started() {
+                        if self.camera.is_none() {
+                            let mut camera = device_provider
+                                .iter::<aperture::Camera>()
+                                .find(move |item| {
+                                    let item = item.as_ref().unwrap();
+                                    match item.location() {
+                                        aperture::CameraLocation::Back => true,
+                                        _ => false,
+                                    }
+                                })
+                                .map(|res| res.unwrap());
+                            if camera.is_none() {
+                                device_provider
+                                    .iter::<aperture::Camera>()
+                                    .find(move |item| {
+                                        let item = item.as_ref().unwrap();
+                                        match item.location() {
+                                            aperture::CameraLocation::External => true,
+                                            _ => false,
+                                        }
+                                    })
+                                    .map(|res| res.unwrap());
+                            }
+                            if camera.is_none() {
+                                camera = device_provider.camera(0);
+                            }
+
+                            self.camera = camera;
+                        }
+
+                        if self.camera.is_some() {
+                            self.view_finder.set_camera(self.camera.clone());
+                            self.view_finder.start_stream();
+                            self.set_state(State::InView);
+                        } else {
+                            self.set_state(State::Nothing);
+                        }
+                    } else {
+                        self.set_state(State::Nothing);
+                    }
+                }
+            }
+        }
+    }
+
+    #[derive(Debug)]
+    enum ErrorInternal {
+        Pipewire(aperture::PipewireError),
+        Provider(aperture::ProviderError),
+    }
+
+    impl From<aperture::PipewireError> for ErrorInternal {
+        fn from(value: aperture::PipewireError) -> Self {
+            ErrorInternal::Pipewire(value)
+        }
+    }
+
+    impl From<aperture::ProviderError> for ErrorInternal {
+        fn from(value: aperture::ProviderError) -> Self {
+            ErrorInternal::Provider(value)
+        }
+    }
+}

paket/src/tracking.rs

@@ -78,7 +78,8 @@ impl Component for TrackingView {
 
                         #[local_ref]
                         tracking_box -> gtk::Box {
-                            set_spacing: 8
+                            set_spacing: 8,
+                            set_orientation: gtk::Orientation::Vertical,
                         },
                     }
                 },