src/ordering/application/services/delete_line_item_service.rs

@@ -0,0 +1,132 @@
+// 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 time::OffsetDateTime;
+
+use super::errors::*;
+use crate::ordering::{
+    application::port::output::db::line_item_id_exists::*,
+    domain::{delete_line_item_command::*, line_item_aggregate::*, line_item_deleted_event::*},
+};
+use crate::utils::uuid::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait DeleteLineItemUseCase: Send + Sync {
+    async fn delete_line_item(
+        &self,
+        cmd: DeleteLineItemCommand,
+    ) -> OrderingResult<LineItemDeletedEvent>;
+}
+
+pub type DeleteLineItemServiceObj = Arc<dyn DeleteLineItemUseCase>;
+
+#[derive(Clone, Builder)]
+pub struct DeleteLineItemService {
+    db_line_item_id_exists: LineItemIDExistsDBPortObj,
+}
+
+#[async_trait::async_trait]
+impl DeleteLineItemUseCase for DeleteLineItemService {
+    async fn delete_line_item(
+        &self,
+        cmd: DeleteLineItemCommand,
+    ) -> OrderingResult<LineItemDeletedEvent> {
+        if !self
+            .db_line_item_id_exists
+            .line_item_id_exists(cmd.line_item().line_item_id())
+            .await?
+        {
+            return Err(OrderingError::LineItemIDNotFound);
+        }
+
+        let deleted_line_item = LineItemBuilder::default()
+            .sale_time(cmd.line_item().sale_time().clone())
+            .product_name(cmd.line_item().product_name().into())
+            .product_id(*cmd.line_item().product_id())
+            .line_item_id(*cmd.line_item().line_item_id())
+            .quantity(cmd.line_item().quantity().clone())
+            .deleted(true)
+            .build()
+            .unwrap();
+
+        Ok(LineItemDeletedEventBuilder::default()
+            .added_by_user(*cmd.adding_by())
+            .line_item(deleted_line_item)
+            .build()
+            .unwrap())
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use crate::ordering::domain::line_item_deleted_event::tests::get_deleted_line_item_event_from_command;
+    use crate::tests::bdd::*;
+
+    pub fn mock_delete_line_item_service(
+        times: Option<usize>,
+        cmd: DeleteLineItemCommand,
+    ) -> DeleteLineItemServiceObj {
+        let mut m = MockDeleteLineItemUseCase::new();
+
+        let res = get_deleted_line_item_event_from_command(&cmd);
+        if let Some(times) = times {
+            m.expect_delete_line_item()
+                .times(times)
+                .returning(move |_| Ok(res.clone()));
+        } else {
+            m.expect_delete_line_item()
+                .returning(move |_| Ok(res.clone()));
+        }
+
+        Arc::new(m)
+    }
+
+    #[actix_rt::test]
+    async fn test_service() {
+        let cmd = DeleteLineItemCommand::get_cmd();
+
+        let s = DeleteLineItemServiceBuilder::default()
+            .db_line_item_id_exists(mock_line_item_id_exists_db_port_true(IS_CALLED_ONLY_ONCE))
+            .build()
+            .unwrap();
+
+        let res = s.delete_line_item(cmd.clone()).await.unwrap();
+        assert_eq!(
+            res.line_item().product_name(),
+            cmd.line_item().product_name()
+        );
+        assert_eq!(res.line_item().product_id(), cmd.line_item().product_id());
+        assert_eq!(res.line_item().quantity(), cmd.line_item().quantity());
+        assert_eq!(
+            res.line_item().line_item_id(),
+            cmd.line_item().line_item_id()
+        );
+        assert!(res.line_item().deleted());
+
+        assert_eq!(res.added_by_user(), cmd.adding_by());
+    }
+
+    #[actix_rt::test]
+    async fn test_service_line_item_id_doesnt_exist() {
+        let cmd = DeleteLineItemCommand::get_cmd();
+
+        let s = DeleteLineItemServiceBuilder::default()
+            .db_line_item_id_exists(mock_line_item_id_exists_db_port_false(IS_CALLED_ONLY_ONCE))
+            .build()
+            .unwrap();
+
+        assert_eq!(
+            s.delete_line_item(cmd.clone()).await,
+            Err(OrderingError::LineItemIDNotFound)
+        );
+    }
+}

src/ordering/application/services/mod.rs

@@ -10,18 +10,21 @@ pub mod errors;
 
 //services
 pub mod add_line_item_service;
+pub mod delete_line_item_service;
 pub mod update_line_item_service;
 
 #[automock]
 pub trait OrderingServicesInterface: Send + Sync {
     fn add_line_item(&self) -> add_line_item_service::AddLineItemServiceObj;
     fn update_line_item(&self) -> update_line_item_service::UpdateLineItemServiceObj;
+    fn delete_line_item(&self) -> delete_line_item_service::DeleteLineItemServiceObj;
 }
 
 #[derive(Clone, Builder)]
 pub struct OrderingServices {
     add_line_item: add_line_item_service::AddLineItemServiceObj,
     update_line_item: update_line_item_service::UpdateLineItemServiceObj,
+    delete_line_item: delete_line_item_service::DeleteLineItemServiceObj,
 }
 
 impl OrderingServicesInterface for OrderingServices {
@@ -31,4 +34,8 @@ impl OrderingServicesInterface for OrderingServices {
     fn update_line_item(&self) -> update_line_item_service::UpdateLineItemServiceObj {
         self.update_line_item.clone()
     }
+
+    fn delete_line_item(&self) -> delete_line_item_service::DeleteLineItemServiceObj {
+        self.delete_line_item.clone()
+    }
 }

src/ordering/domain/line_item_aggregate.rs

@@ -96,7 +96,8 @@ impl Aggregate for LineItem {
                 Ok(vec![OrderingEvent::LineItemUpdated(res)])
             }
             OrderingCommand::DeleteLineItem(cmd) => {
-                unimplemented!()
+                let res = services.delete_line_item().delete_line_item(cmd).await?;
+                Ok(vec![OrderingEvent::LineItemDeleted(res)])
             } //    _ => Ok(Vec::default()),
         }
     }
@@ -117,10 +118,13 @@ mod aggregate_tests {
 
     use add_line_item_service::tests::mock_add_line_item_service;
     use cqrs_es::test::TestFramework;
+    use delete_line_item_service::tests::mock_delete_line_item_service;
     use update_line_item_service::tests::mock_update_line_item_service;
 
     use super::*;
 
+    use crate::ordering::domain::delete_line_item_command::DeleteLineItemCommand;
+    use crate::ordering::domain::line_item_deleted_event::tests::get_deleted_line_item_event_from_command;
     use crate::ordering::domain::line_item_updated_event::tests::get_updated_line_item_event_from_command;
     use crate::ordering::domain::update_line_item_command::UpdateLineItemCommand;
     use crate::tests::bdd::*;
@@ -170,4 +174,25 @@ mod aggregate_tests {
             .when(OrderingCommand::UpdateLineItem(cmd))
             .then_expect_events(vec![expected]);
     }
+
+    #[test]
+    fn test_delete_line_item() {
+        let cmd = DeleteLineItemCommand::get_cmd();
+        let expected = get_deleted_line_item_event_from_command(&cmd);
+        let expected = OrderingEvent::LineItemDeleted(expected);
+
+        let mut services = MockOrderingServicesInterface::new();
+        services
+            .expect_delete_line_item()
+            .times(IS_CALLED_ONLY_ONCE.unwrap())
+            .return_const(mock_delete_line_item_service(
+                IS_CALLED_ONLY_ONCE,
+                cmd.clone(),
+            ));
+
+        LineItemTestFramework::with(Arc::new(services))
+            .given_no_previous_events()
+            .when(OrderingCommand::DeleteLineItem(cmd))
+            .then_expect_events(vec![expected]);
+    }
 }

src/ordering/domain/line_item_deleted_event.rs

@@ -27,15 +27,26 @@ pub mod tests {
     pub fn get_deleted_line_item_event_from_command(
         cmd: &DeleteLineItemCommand,
     ) -> LineItemDeletedEvent {
+        let deleted_line_item = LineItemBuilder::default()
+            .sale_time(cmd.line_item().sale_time().clone())
+            .product_name(cmd.line_item().product_name().into())
+            .product_id(*cmd.line_item().product_id())
+            .line_item_id(*cmd.line_item().line_item_id())
+            .quantity(cmd.line_item().quantity().clone())
+            .deleted(true)
+            .build()
+            .unwrap();
+
         LineItemDeletedEventBuilder::default()
             .added_by_user(cmd.adding_by().clone())
-            .line_item(cmd.line_item().clone())
+            .line_item(deleted_line_item)
             .build()
             .unwrap()
     }
 
     #[test]
     fn test_event() {
-        get_deleted_line_item_event_from_command(&DeleteLineItemCommand::get_cmd());
+        let event = get_deleted_line_item_event_from_command(&DeleteLineItemCommand::get_cmd());
+        assert!(event.line_item().deleted());
     }
 }