diff --git a/web/src/lib.rs b/web/src/lib.rs
index d855c44..db5b4b8 100644
--- a/web/src/lib.rs
+++ b/web/src/lib.rs
@@ -8,6 +8,7 @@ mod model;
 mod pages;
 pub mod session;
 pub mod shared;
+pub mod shopping_cart;
 
 use seed::empty;
 use seed::prelude::*;
@@ -81,10 +82,12 @@ fn init(url: Url, orders: &mut impl Orders<Msg>) -> Model {
             .and_then(|el: web_sys::Element| el.get_attribute("href")),
         shared: shared::Model::default(),
         i18n: I18n::load(),
+        cart: Default::default(),
         #[cfg(debug_assertions)]
         debug_modal: false,
     };
 
+    shopping_cart::init(&mut model, orders);
     session::init(&mut model, orders);
     shared::init(&mut model, orders);
 
@@ -101,7 +104,7 @@ fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
             orders.skip();
         }
         Msg::Shared(msg) => {
-            shared::update(msg, &mut model.shared, orders);
+            shared::update(msg, model, orders);
         }
         Msg::UrlChanged(subs::UrlChanged(url)) => model.page.page_changed(url, orders),
         Msg::Public(pages::public::Msg::Listing(msg)) => {
diff --git a/web/src/model.rs b/web/src/model.rs
index 5f7bb01..d775a58 100644
--- a/web/src/model.rs
+++ b/web/src/model.rs
@@ -1,6 +1,6 @@
 use seed::Url;
 
-use crate::{I18n, Page};
+use crate::{I18n, Page, shopping_cart};
 
 #[derive(Debug)]
 pub struct Model {
@@ -10,6 +10,7 @@ pub struct Model {
     pub logo: Option<String>,
     pub shared: crate::shared::Model,
     pub i18n: I18n,
+    pub cart: shopping_cart::ShoppingCart,
     #[cfg(debug_assertions)]
     pub debug_modal: bool,
 }
diff --git a/web/src/pages.rs b/web/src/pages.rs
index b1f4cb6..a158fcb 100644
--- a/web/src/pages.rs
+++ b/web/src/pages.rs
@@ -13,7 +13,7 @@ pub enum Msg {
     Public(public::Msg),
     Admin(admin::Msg),
     UrlChanged(subs::UrlChanged),
-    Shared(shared::Msg),
+    Shared(shared::SharedMsg),
     Session(crate::session::SessionMsg),
     #[cfg(debug_assertions)]
     Debug(crate::debug::DebugMsg),
diff --git a/web/src/session.rs b/web/src/session.rs
index 37b49e1..f7d518b 100644
--- a/web/src/session.rs
+++ b/web/src/session.rs
@@ -2,8 +2,9 @@ use chrono::{NaiveDateTime, TimeZone};
 use model::{AccessTokenString, RefreshTokenString};
 use seed::prelude::*;
 
+use crate::pages::AdminPage;
 use crate::shared::notification::NotificationMsg;
-use crate::{Model, Msg};
+use crate::{pages, Model, Msg, Page, PublicPage};
 
 #[derive(Debug)]
 pub enum SessionMsg {
@@ -29,11 +30,40 @@ pub fn init(model: &mut Model, orders: &mut impl Orders<Msg>) {
         .ok()
         .map(model::RefreshTokenString::new);
     model.shared.exp = LocalStorage::get::<_, String>("exp").ok().and_then(|s| {
-        seed::log!("Parsing ", s);
         chrono::DateTime::parse_from_rfc3339(&s)
             .ok()
             .map(|t| t.naive_utc())
-    })
+    });
+    redirect_on_session(model, orders);
+}
+
+pub fn redirect_on_session(model: &Model, orders: &mut impl Orders<Msg>) {
+    seed::log!(&model.page, model.shared.me.is_some());
+    match &model.page {
+        Page::Admin(admin) => match admin {
+            AdminPage::Landing => {}
+            AdminPage::Dashboard => {}
+            AdminPage::Products => {}
+            AdminPage::Product => {}
+        },
+        Page::Public(public) if model.shared.me.is_some() => match public {
+            PublicPage::SignUp(_) | PublicPage::SignIn(_) => {
+                let url = model.url.clone().set_path(&[] as &[&str]);
+                url.go_and_push();
+                orders.send_msg(crate::Msg::UrlChanged(subs::UrlChanged(url)));
+                orders.force_render_now();
+            }
+            _ => {}
+        },
+        Page::Public(public) => match public {
+            PublicPage::Listing(_) => {}
+            PublicPage::Product(_) => {}
+            PublicPage::SignIn(_) => {}
+            PublicPage::SignUp(_) => {}
+            PublicPage::ShoppingCart => {}
+            PublicPage::Checkout => {}
+        },
+    }
 }
 
 pub fn update(msg: SessionMsg, model: &mut Model, orders: &mut impl Orders<Msg>) {
@@ -103,7 +133,7 @@ pub fn update(msg: SessionMsg, model: &mut Model, orders: &mut impl Orders<Msg>)
             errors.into_iter().for_each(|msg| {
                 orders
                     .skip()
-                    .send_msg(Msg::Shared(crate::shared::Msg::Notification(
+                    .send_msg(Msg::Shared(crate::shared::SharedMsg::Notification(
                         NotificationMsg::Error(msg),
                     )));
             });
@@ -133,7 +163,7 @@ pub fn update(msg: SessionMsg, model: &mut Model, orders: &mut impl Orders<Msg>)
                 _ => {
                     orders
                         .skip()
-                        .send_msg(Msg::Shared(crate::shared::Msg::Notification(
+                        .send_msg(Msg::Shared(crate::shared::SharedMsg::Notification(
                             NotificationMsg::Error("Request failed".into()),
                         )));
                 }
diff --git a/web/src/shared.rs b/web/src/shared.rs
index 227e853..a2a8f97 100644
--- a/web/src/shared.rs
+++ b/web/src/shared.rs
@@ -1,15 +1,17 @@
 use seed::app::Orders;
 
+use crate::session::redirect_on_session;
+
 pub mod notification;
 pub mod view;
 
 #[derive(Debug)]
-pub enum Msg {
+pub enum SharedMsg {
     LoadMe,
     MeLoaded(crate::api::NetRes<model::Account>),
     SignIn(model::api::SignInInput),
     SignedIn(crate::api::NetRes<model::api::SessionOutput>),
-    Notification(crate::shared::notification::NotificationMsg),
+    Notification(notification::NotificationMsg),
 }
 
 #[derive(Debug, Default)]
@@ -22,38 +24,38 @@ pub struct Model {
 }
 
 pub fn init(_model: &mut crate::Model, orders: &mut impl Orders<crate::Msg>) {
-    orders.send_msg(crate::Msg::Shared(Msg::LoadMe));
+    orders.send_msg(crate::Msg::Shared(SharedMsg::LoadMe));
 }
 
-pub fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<crate::Msg>) {
+pub fn update(msg: SharedMsg, model: &mut crate::Model, orders: &mut impl Orders<crate::Msg>) {
     match msg {
-        Msg::LoadMe => {
-            seed::log!("1");
-            if let Some(token) = model.access_token.as_ref().cloned() {
-                seed::log!("2");
+        SharedMsg::LoadMe => {
+            if let Some(token) = model.shared.access_token.as_ref().cloned() {
                 orders.skip().perform_cmd(async move {
-                    seed::log!("3");
-                    Msg::MeLoaded(crate::api::public::fetch_me(token).await)
+                    crate::Msg::Shared(SharedMsg::MeLoaded(
+                        crate::api::public::fetch_me(token).await,
+                    ))
                 });
             }
         }
-        Msg::MeLoaded(crate::api::NetRes::Success(account)) => {
-            model.me = Some(account);
+        SharedMsg::MeLoaded(crate::api::NetRes::Success(account)) => {
+            model.shared.me = Some(account);
+            redirect_on_session(model, orders);
         }
-        Msg::MeLoaded(crate::api::NetRes::Error(_error)) => {}
-        Msg::MeLoaded(crate::api::NetRes::Http(_error)) => {}
-        Msg::SignIn(input) => {
-            orders
-                .skip()
-                .perform_cmd(async { Msg::SignedIn(crate::api::public::sign_in(input).await) });
+        SharedMsg::MeLoaded(crate::api::NetRes::Error(_error)) => {}
+        SharedMsg::MeLoaded(crate::api::NetRes::Http(_error)) => {}
+        SharedMsg::SignIn(input) => {
+            orders.skip().perform_cmd(async {
+                SharedMsg::SignedIn(crate::api::public::sign_in(input).await)
+            });
         }
-        Msg::SignedIn(crate::api::NetRes::Success(pair)) => {
-            handle_auth_pair(pair, model, orders);
+        SharedMsg::SignedIn(crate::api::NetRes::Success(pair)) => {
+            handle_auth_pair(pair, &mut model.shared, orders);
         }
-        Msg::SignedIn(crate::api::NetRes::Error(_err)) => {}
-        Msg::SignedIn(crate::api::NetRes::Http(_err)) => {}
-        Msg::Notification(msg) => {
-            notification::update(msg, model, orders);
+        SharedMsg::SignedIn(crate::api::NetRes::Error(_err)) => {}
+        SharedMsg::SignedIn(crate::api::NetRes::Http(_err)) => {}
+        SharedMsg::Notification(msg) => {
+            notification::update(msg, &mut model.shared, orders);
         }
     }
 }
diff --git a/web/src/shared/notification.rs b/web/src/shared/notification.rs
index 5191e94..811451f 100644
--- a/web/src/shared/notification.rs
+++ b/web/src/shared/notification.rs
@@ -13,7 +13,7 @@ pub enum NotificationMsg {
     Clear,
 }
 
-impl From<NotificationMsg> for shared::Msg {
+impl From<NotificationMsg> for shared::SharedMsg {
     fn from(msg: NotificationMsg) -> Self {
         Self::Notification(msg)
     }
@@ -152,7 +152,7 @@ pub fn message(id: uuid::Uuid, message: &str, icon: Type) -> Node<Msg> {
                 ev(Ev::Click, move |ev| {
                     ev.prevent_default();
                     ev.stop_propagation();
-                    Msg::Shared(shared::Msg::Notification(NotificationMsg::Close(id)))
+                    Msg::Shared(shared::SharedMsg::Notification(NotificationMsg::Close(id)))
                 })
             ]
         ]
diff --git a/web/src/shopping_cart.rs b/web/src/shopping_cart.rs
new file mode 100644
index 0000000..a58fc06
--- /dev/null
+++ b/web/src/shopping_cart.rs
@@ -0,0 +1,68 @@
+use model::{ProductId, Quantity, QuantityUnit};
+use seed::prelude::*;
+use serde::{Deserialize, Serialize};
+
+use crate::{Model, Msg};
+
+#[derive(Debug)]
+pub enum CartMsg {
+    AddItem {
+        quantity: Quantity,
+        quantity_unit: QuantityUnit,
+        product_id: ProductId,
+    },
+    ModifyItem {
+        quantity: Quantity,
+        quantity_unit: QuantityUnit,
+        product_id: ProductId,
+    },
+}
+
+pub type Items = indexmap::IndexMap<model::ProductId, Item>;
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Item {
+    product_id: ProductId,
+    quantity: Quantity,
+    quantity_unit: QuantityUnit,
+}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct ShoppingCart {
+    pub cart_id: Option<model::ShoppingCartId>,
+    pub items: Items,
+}
+
+pub fn init(model: &mut Model, _orders: &mut impl Orders<Msg>) {
+    model.cart = load_local();
+}
+
+pub fn update(msg: CartMsg, model: &mut Model, _orders: &mut impl Orders<Msg>) {
+    match msg {
+        CartMsg::AddItem {
+            quantity,
+            quantity_unit,
+            product_id,
+        } => {
+            {
+                let items: &mut Items = &mut model.cart.items;
+                let entry = items.entry(product_id).or_insert_with(|| Item {
+                    quantity,
+                    quantity_unit,
+                    product_id,
+                });
+                entry.quantity = quantity;
+                entry.quantity_unit = quantity_unit;
+            }
+            store_local(&model.cart);
+        }
+        CartMsg::ModifyItem { .. } => {}
+    }
+}
+
+fn load_local() -> ShoppingCart {
+    LocalStorage::get("ct").unwrap_or_default()
+}
+fn store_local(cart: &ShoppingCart) {
+    LocalStorage::insert("ct", cart).ok();
+}