feat: define&impl servie to add product

src/inventory/application/services/add_product_service.rs

@@ -0,0 +1,169 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use std::sync::Arc;
+
+use derive_builder::Builder;
+use mockall::predicate::*;
+use mockall::*;
+
+use super::errors::*;
+use crate::inventory::{
+    application::port::output::db::{product_id_exists::*, product_name_exists_for_category::*},
+    domain::{
+        add_product_command::AddProductCommand,
+        product_added_event::{ProductAddedEvent, ProductAddedEventBuilder},
+        product_aggregate::*,
+    },
+};
+use crate::utils::uuid::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait AddProductUseCase: Send + Sync {
+    async fn add_product(&self, cmd: AddProductCommand) -> InventoryResult<ProductAddedEvent>;
+}
+
+pub type AddProductServiceObj = Arc<dyn AddProductUseCase>;
+
+#[derive(Clone, Builder)]
+pub struct AddProductService {
+    db_product_name_exists_for_category: ProductNameExistsForCategoryDBPortObj,
+    db_product_id_exists: ProductIDExistsDBPortObj,
+    get_uuid: GetUUIDInterfaceObj,
+}
+
+#[async_trait::async_trait]
+impl AddProductUseCase for AddProductService {
+    async fn add_product(&self, cmd: AddProductCommand) -> InventoryResult<ProductAddedEvent> {
+        let mut product_id = self.get_uuid.get_uuid();
+
+        loop {
+            if self
+                .db_product_id_exists
+                .product_id_exists(&product_id)
+                .await?
+            {
+                product_id = self.get_uuid.get_uuid();
+                continue;
+            } else {
+                break;
+            }
+        }
+
+        let product = ProductBuilder::default()
+            .name(cmd.name().into())
+            .description(cmd.description().as_ref().map(|s| s.to_string()))
+            .image(cmd.image().clone())
+            .sku_able(cmd.sku_able().clone())
+            .price(cmd.price().clone())
+            .category_id(cmd.category_id().clone())
+            .product_id(product_id)
+            .build()
+            .unwrap();
+
+        if self
+            .db_product_name_exists_for_category
+            .product_name_exists_for_category(&product)
+            .await?
+        {
+            return Err(InventoryError::DuplicateProductName);
+        }
+
+        Ok(ProductAddedEventBuilder::default()
+            .added_by_user(cmd.adding_by().clone())
+            .name(product.name().into())
+            .description(product.description().as_ref().map(|s| s.to_string()))
+            .image(product.image().clone())
+            .sku_able(product.sku_able().clone())
+            .price(product.price().clone())
+            .category_id(product.category_id().clone())
+            .product_id(product.product_id().clone())
+            .build()
+            .unwrap())
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use uuid::Uuid;
+
+    use crate::inventory::domain::add_product_command::tests::get_command;
+    use crate::utils::uuid::tests::UUID;
+    use crate::{tests::bdd::*, utils::uuid::tests::mock_get_uuid};
+
+    pub fn mock_add_product_service(
+        times: Option<usize>,
+        cmd: AddProductCommand,
+    ) -> AddProductServiceObj {
+        let mut m = MockAddProductUseCase::new();
+
+        let res = ProductAddedEventBuilder::default()
+            .name(cmd.name().into())
+            .description(cmd.description().as_ref().map(|s| s.to_string()))
+            .image(cmd.image().as_ref().map(|s| s.to_string()))
+            .sku_able(cmd.sku_able().clone())
+            .category_id(cmd.category_id().clone())
+            .product_id(UUID.clone())
+            .price(cmd.price().clone())
+            .added_by_user(cmd.adding_by().clone())
+            .build()
+            .unwrap();
+
+        if let Some(times) = times {
+            m.expect_add_product()
+                .times(times)
+                .returning(move |_| Ok(res.clone()));
+        } else {
+            m.expect_add_product().returning(move |_| Ok(res.clone()));
+        }
+
+        Arc::new(m)
+    }
+
+    #[actix_rt::test]
+    async fn test_service_product_doesnt_exist() {
+        let cmd = get_command();
+
+        let s = AddProductServiceBuilder::default()
+            .db_product_name_exists_for_category(
+                mock_product_name_exists_for_category_db_port_false(IS_CALLED_ONLY_ONCE),
+            )
+            .db_product_id_exists(mock_product_id_exists_db_port_false(IS_CALLED_ONLY_ONCE))
+            .get_uuid(mock_get_uuid(IS_CALLED_ONLY_ONCE))
+            .build()
+            .unwrap();
+
+        let res = s.add_product(cmd.clone()).await.unwrap();
+        assert_eq!(res.name(), cmd.name());
+        assert_eq!(res.description(), cmd.description());
+        assert_eq!(res.image(), cmd.image());
+        assert_eq!(res.sku_able(), cmd.sku_able());
+        assert_eq!(res.price(), cmd.price());
+        assert_eq!(res.added_by_user(), cmd.adding_by());
+        assert_eq!(res.category_id(), cmd.category_id());
+        assert_eq!(res.product_id(), &UUID);
+    }
+
+    #[actix_rt::test]
+    async fn test_service_product_name_exists_for_store() {
+        let cmd = get_command();
+
+        let s = AddProductServiceBuilder::default()
+            .db_product_name_exists_for_category(
+                mock_product_name_exists_for_category_db_port_true(IS_CALLED_ONLY_ONCE),
+            )
+            .get_uuid(mock_get_uuid(IS_CALLED_ONLY_ONCE))
+            .db_product_id_exists(mock_product_id_exists_db_port_false(IS_CALLED_ONLY_ONCE))
+            .build()
+            .unwrap();
+
+        assert_eq!(
+            s.add_product(cmd.clone()).await,
+            Err(InventoryError::DuplicateProductName)
+        )
+    }
+}

src/inventory/application/services/errors.rs

@@ -14,6 +14,7 @@ pub type InventoryResult<V> = Result<V, InventoryError>;
 pub enum InventoryError {
     DuplicateCategoryName,
     DuplicateStoreName,
+    DuplicateProductName,
     InternalError,
 }
 
@@ -22,9 +23,18 @@ impl From<InventoryDBError> for InventoryError {
         match value {
             InventoryDBError::DuplicateCategoryName => Self::DuplicateCategoryName,
             InventoryDBError::DuplicateStoreName => Self::DuplicateStoreName,
+            InventoryDBError::DuplicateProductName => Self::DuplicateProductName,
             InventoryDBError::DuplicateStoreID => {
                 error!("DuplicateStoreID");
                 Self::InternalError
+            },
+            InventoryDBError::DuplicateProductID => {
+                error!("DuplicateProductID");
+                Self::InternalError
+            },
+            InventoryDBError::DuplicateCategoryID => {
+                error!("DuplicateCategoryID");
+                Self::InternalError
             }
             InventoryDBError::InternalError => Self::InternalError,
         }

src/inventory/application/services/mod.rs

@@ -10,18 +10,21 @@ pub mod errors;
 
 // services
 pub mod add_category_service;
+pub mod add_product_service;
 pub mod add_store_service;
 
 #[automock]
 pub trait InventoryServicesInterface: Send + Sync {
     fn add_store(&self) -> add_store_service::AddStoreServiceObj;
     fn add_category(&self) -> add_category_service::AddCategoryServiceObj;
+    fn add_product(&self) -> add_product_service::AddProductServiceObj;
 }
 
 #[derive(Clone, Builder)]
 pub struct InventoryServices {
     add_store: add_store_service::AddStoreServiceObj,
     add_category: add_category_service::AddCategoryServiceObj,
+    add_product: add_product_service::AddProductServiceObj,
 }
 
 impl InventoryServicesInterface for InventoryServices {
@@ -31,4 +34,7 @@ impl InventoryServicesInterface for InventoryServices {
     fn add_category(&self) -> add_category_service::AddCategoryServiceObj {
         self.add_category.clone()
     }
+    fn add_product(&self) -> add_product_service::AddProductServiceObj {
+        self.add_product.clone()
+    }
 }