feat: service to add order aggregate

src/ordering/application/services/add_order_service.rs

@@ -0,0 +1,108 @@
+// 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::order_id_exists::*,
+    domain::{add_order_command::*, order_added_event::*, order_aggregate::*},
+};
+use crate::utils::uuid::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait AddOrderUseCase: Send + Sync {
+    async fn add_order(&self, cmd: AddOrderCommand) -> OrderingResult<OrderAddedEvent>;
+}
+
+pub type AddOrderServiceObj = Arc<dyn AddOrderUseCase>;
+
+#[derive(Clone, Builder)]
+pub struct AddOrderService {
+    db_order_id_exists: OrderIDExistsDBPortObj,
+    get_uuid: GetUUIDInterfaceObj,
+}
+
+#[async_trait::async_trait]
+impl AddOrderUseCase for AddOrderService {
+    async fn add_order(&self, cmd: AddOrderCommand) -> OrderingResult<OrderAddedEvent> {
+        let mut order_id = self.get_uuid.get_uuid();
+
+        loop {
+            if self
+                .db_order_id_exists
+                .order_id_exists(&order_id)
+                .await?
+            {
+                order_id = self.get_uuid.get_uuid();
+                continue;
+            } else {
+                break;
+            }
+        }
+
+        let order = OrderBuilder::default()
+            .created_time(OffsetDateTime::now_utc())
+            .customer_name(cmd.customer_name().into())
+            .order_id(order_id)
+            .deleted(false)
+            .build()
+            .unwrap();
+
+        Ok(OrderAddedEventBuilder::default()
+            .added_by_user(*cmd.adding_by())
+            .order(order)
+            .build()
+            .unwrap())
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use crate::ordering::domain::order_added_event::tests::get_added_order_event_from_command;
+    use crate::utils::uuid::tests::UUID;
+    use crate::{tests::bdd::*, utils::uuid::tests::mock_get_uuid};
+
+    pub fn mock_add_order_service(
+        times: Option<usize>,
+        cmd: AddOrderCommand,
+    ) -> AddOrderServiceObj {
+        let mut m = MockAddOrderUseCase::new();
+
+        let res = get_added_order_event_from_command(&cmd);
+        if let Some(times) = times {
+            m.expect_add_order()
+                .times(times)
+                .returning(move |_| Ok(res.clone()));
+        } else {
+            m.expect_add_order().returning(move |_| Ok(res.clone()));
+        }
+
+        Arc::new(m)
+    }
+
+    #[actix_rt::test]
+    async fn test_service() {
+        let cmd = AddOrderCommand::get_cmd();
+
+        let s = AddOrderServiceBuilder::default()
+            .db_order_id_exists(mock_order_id_exists_db_port_false(IS_CALLED_ONLY_ONCE))
+            .get_uuid(mock_get_uuid(IS_CALLED_ONLY_ONCE))
+            .build()
+            .unwrap();
+
+        let res = s.add_order(cmd.clone()).await.unwrap();
+        assert_eq!(res.order().customer_name(), cmd.customer_name());
+        assert!(!res.order().deleted());
+        assert_eq!(res.added_by_user(), cmd.adding_by());
+    }
+}

src/ordering/application/services/errors.rs

@@ -14,6 +14,7 @@ pub type OrderingResult<V> = Result<V, OrderingError>;
 pub enum OrderingError {
     LineItemIDNotFound,
     InternalError,
+    OrderIDNotFound,
 }
 //
 impl From<OrderingDBError> for OrderingError {
@@ -24,6 +25,11 @@ impl From<OrderingDBError> for OrderingError {
                 Self::InternalError
             }
             OrderingDBError::LineItemIDNotFound => OrderingError::LineItemIDNotFound,
+            OrderingDBError::DuplicateOrderID => {
+                error!("DuplicateOrderID");
+                Self::InternalError
+            }
+            OrderingDBError::OrderIDNotFound => OrderingError::OrderIDNotFound,
             OrderingDBError::InternalError => Self::InternalError,
         }
     }

src/ordering/application/services/mod.rs

@@ -12,12 +12,14 @@ pub mod errors;
 pub mod add_line_item_service;
 pub mod delete_line_item_service;
 pub mod update_line_item_service;
+pub mod add_order_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;
+    fn add_order(&self) -> add_order_service::AddOrderServiceObj;
 }
 
 #[derive(Clone, Builder)]
@@ -25,6 +27,7 @@ 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,
+    add_order: add_order_service::AddOrderServiceObj,
 }
 
 impl OrderingServicesInterface for OrderingServices {
@@ -38,4 +41,8 @@ impl OrderingServicesInterface for OrderingServices {
     fn delete_line_item(&self) -> delete_line_item_service::DeleteLineItemServiceObj {
         self.delete_line_item.clone()
     }
+
+    fn add_order(&self) -> add_order_service::AddOrderServiceObj {
+        self.add_order.clone()
+    }
 }