src/inventory/adapters/output/db/postgres/errors.rs

@@ -17,6 +17,8 @@ impl From<SqlxError> for InventoryDBError {
                 let msg = err.message();
                 if msg.contains("cqrs_inventory_store_query_store_id_key") {
                     return Self::DuplicateStoreID;
+                } else if msg.contains("cqrs_inventory_store_query_name_key") {
+                    return Self::DuplicateStoreName;
                 } else {
                     println!("{msg}");
                 }

src/inventory/adapters/output/db/postgres/store_name_exists.rs

@@ -0,0 +1,78 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use super::InventoryDBPostgresAdapter;
+use crate::inventory::application::port::output::db::{errors::*, store_name_exists::*};
+use crate::inventory::domain::store_aggregate::*;
+
+#[async_trait::async_trait]
+impl StoreNameExistsDBPort for InventoryDBPostgresAdapter {
+    async fn store_name_exists(&self, s: &Store) -> InventoryDBResult<bool> {
+        let res = sqlx::query!(
+            "SELECT EXISTS (
+                SELECT 1
+                    FROM cqrs_inventory_store_query
+                WHERE
+                    name = $1
+            );",
+            s.name(),
+        )
+        .fetch_one(&self.pool)
+        .await?;
+        if let Some(x) = res.exists {
+            Ok(x)
+        } else {
+            Ok(false)
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use uuid::Uuid;
+
+    use super::*;
+
+    #[actix_rt::test]
+    async fn test_postgres_store_exists() {
+        let store_id = Uuid::new_v4();
+        let settings = crate::settings::tests::get_settings().await;
+        settings.create_db().await;
+        let db = super::InventoryDBPostgresAdapter::new(
+            sqlx::postgres::PgPool::connect(&settings.database.url)
+                .await
+                .unwrap(),
+        );
+
+        let store = StoreBuilder::default()
+            .name("store_name".into())
+            .owner("store_owner".into())
+            .address(Some("store_address".into()))
+            .store_id(store_id)
+            .build()
+            .unwrap();
+
+        // state doesn't exist
+        assert!(!db.store_name_exists(&store).await.unwrap());
+
+        sqlx::query!(
+            "INSERT INTO cqrs_inventory_store_query
+                (version, name, address, store_id, owner)
+            VALUES ($1, $2, $3, $4, $5);",
+            1,
+            store.name(),
+            store.address().as_ref().unwrap(),
+            store.store_id(),
+            store.owner(),
+        )
+        .execute(&db.pool)
+        .await
+        .unwrap();
+
+        // state exists
+        assert!(db.store_name_exists(&store).await.unwrap());
+
+        settings.drop_db().await;
+    }
+}

src/inventory/application/port/output/db/errors.rs

@@ -10,6 +10,7 @@ pub type InventoryDBResult<V> = Result<V, InventoryDBError>;
 #[derive(Debug, Display, Clone, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 pub enum InventoryDBError {
     DuplicateCategoryName,
+    DuplicateStoreName,
     DuplicateStoreID,
     InternalError,
 }

src/inventory/application/port/output/db/mod.rs

@@ -6,3 +6,4 @@ pub mod category_id_exists;
 pub mod category_name_exists_for_store;
 pub mod errors;
 pub mod store_id_exists;
+pub mod store_name_exists;

src/inventory/application/port/output/db/store_name_exists.rs

@@ -0,0 +1,54 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use mockall::predicate::*;
+use mockall::*;
+
+use crate::inventory::domain::store_aggregate::Store;
+
+use super::errors::*;
+#[cfg(test)]
+#[allow(unused_imports)]
+pub use tests::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait StoreNameExistsDBPort: Send + Sync {
+    async fn store_name_exists(&self, s: &Store) -> InventoryDBResult<bool>;
+}
+
+pub type StoreNameExistsDBPortObj = std::sync::Arc<dyn StoreNameExistsDBPort>;
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use std::sync::Arc;
+
+    pub fn mock_store_name_exists_db_port_false(times: Option<usize>) -> StoreNameExistsDBPortObj {
+        let mut m = MockStoreNameExistsDBPort::new();
+        if let Some(times) = times {
+            m.expect_store_name_exists()
+                .times(times)
+                .returning(|_| Ok(false));
+        } else {
+            m.expect_store_name_exists().returning(|_| Ok(false));
+        }
+
+        Arc::new(m)
+    }
+
+    pub fn mock_store_name_exists_db_port_true(times: Option<usize>) -> StoreNameExistsDBPortObj {
+        let mut m = MockStoreNameExistsDBPort::new();
+        if let Some(times) = times {
+            m.expect_store_name_exists()
+                .times(times)
+                .returning(|_| Ok(true));
+        } else {
+            m.expect_store_name_exists().returning(|_| Ok(true));
+        }
+
+        Arc::new(m)
+    }
+}

src/inventory/application/services/add_store_service.rs

@@ -1,6 +1,7 @@
 // SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
 //
 // SPDX-License-Identifier: AGPL-3.0-or-later
+
 use std::sync::Arc;
 
 use derive_builder::Builder;
@@ -9,7 +10,9 @@ use mockall::*;
 
 use super::errors::*;
 use crate::inventory::{
-    application::port::output::db::{errors::InventoryDBError, store_id_exists::*},
+    application::port::output::db::{
+        errors::InventoryDBError, store_id_exists::*, store_name_exists::*,
+    },
     domain::{
         add_store_command::AddStoreCommand,
         store_added_event::{StoreAddedEvent, StoreAddedEventBuilder},
@@ -29,6 +32,7 @@ pub type AddStoreServiceObj = Arc<dyn AddStoreUseCase>;
 #[derive(Clone, Builder)]
 pub struct AddStoreService {
     db_store_id_exists: StoreIDExistsDBPortObj,
+    db_store_name_exists: StoreNameExistsDBPortObj,
     get_uuid: GetUUIDInterfaceObj,
 }
 
@@ -43,6 +47,11 @@ impl AddStoreUseCase for AddStoreService {
             .store_id(store_id.clone())
             .build()
             .unwrap();
+
+        if self.db_store_name_exists.store_name_exists(&store).await? {
+            return Err(InventoryError::DuplicateStoreName);
+        }
+
         loop {
             if self.db_store_id_exists.store_id_exists(&store).await? {
                 store_id = self.get_uuid.get_uuid();
@@ -111,6 +120,7 @@ pub mod tests {
 
         let s = AddStoreServiceBuilder::default()
             .db_store_id_exists(mock_store_id_exists_db_port_false(IS_CALLED_ONLY_ONCE))
+            .db_store_name_exists(mock_store_name_exists_db_port_false(IS_CALLED_ONLY_ONCE))
             .get_uuid(mock_get_uuid(IS_CALLED_ONLY_ONCE))
             .build()
             .unwrap();
@@ -121,4 +131,26 @@ pub mod tests {
         assert_eq!(res.owner(), cmd.owner());
         assert_eq!(res.store_id(), &UUID);
     }
+
+    #[actix_rt::test]
+    async fn test_service_store_name_exists() {
+        let name = "foo";
+        let address = "bar";
+        let username = "baz";
+
+        // address = None
+        let cmd = AddStoreCommand::new(name.into(), Some(address.into()), username.into()).unwrap();
+
+        let s = AddStoreServiceBuilder::default()
+            .db_store_id_exists(mock_store_id_exists_db_port_false(IS_NEVER_CALLED))
+            .db_store_name_exists(mock_store_name_exists_db_port_true(IS_CALLED_ONLY_ONCE))
+            .get_uuid(mock_get_uuid(IS_CALLED_ONLY_ONCE))
+            .build()
+            .unwrap();
+
+        assert_eq!(
+            s.add_store(cmd.clone()).await,
+            Err(InventoryError::DuplicateStoreName)
+        );
+    }
 }

src/inventory/application/services/errors.rs

@@ -13,6 +13,7 @@ pub type InventoryResult<V> = Result<V, InventoryError>;
 #[derive(Debug, Error, Display, Clone, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 pub enum InventoryError {
     DuplicateCategoryName,
+    DuplicateStoreName,
     InternalError,
 }
 
@@ -20,6 +21,7 @@ impl From<InventoryDBError> for InventoryError {
     fn from(value: InventoryDBError) -> Self {
         match value {
             InventoryDBError::DuplicateCategoryName => Self::DuplicateCategoryName,
+            InventoryDBError::DuplicateStoreName => Self::DuplicateStoreName,
             InventoryDBError::DuplicateStoreID => {
                 error!("DuplicateStoreID");
                 Self::InternalError