.sqlx/query-1804fe2c946337fb2d10683b273bc00c8291b5ca0624f6a8fcb1d701d6b383c5.json

@@ -0,0 +1,18 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "INSERT INTO cqrs_ordering_kot_query (\n                        version,\n                        order_id,\n                        kot_id,\n                        created_time,\n                        deleted\n                    ) VALUES (\n                        $1, $2, $3, $4, $5\n                    );",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Int8",
+        "Uuid",
+        "Uuid",
+        "Timestamptz",
+        "Bool"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "1804fe2c946337fb2d10683b273bc00c8291b5ca0624f6a8fcb1d701d6b383c5"
+}

.sqlx/query-4b7100e5c7442066dbb4ea7c9733e038af635766f0be61a86ca7084b34a2109d.json

@@ -0,0 +1,18 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "UPDATE\n                        cqrs_ordering_kot_query\n                    SET\n                        version = $1,\n                        order_id = $2,\n                        kot_id = $3,\n                        created_time = $4,\n                        deleted = $5;",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Int8",
+        "Uuid",
+        "Uuid",
+        "Timestamptz",
+        "Bool"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "4b7100e5c7442066dbb4ea7c9733e038af635766f0be61a86ca7084b34a2109d"
+}

.sqlx/query-5db3c3d1ff503d25d3f8fc529a95fac6c716e1f575eb59d7a3a149d06760741b.json

@@ -0,0 +1,28 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "SELECT \n                kot_id, version\n             FROM\n                cqrs_ordering_kot_query\n            WHERE\n                kot_id = $1;",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "kot_id",
+        "type_info": "Uuid"
+      },
+      {
+        "ordinal": 1,
+        "name": "version",
+        "type_info": "Int8"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Uuid"
+      ]
+    },
+    "nullable": [
+      false,
+      false
+    ]
+  },
+  "hash": "5db3c3d1ff503d25d3f8fc529a95fac6c716e1f575eb59d7a3a149d06760741b"
+}

.sqlx/query-ad00213731142dc3853945e02662a93b1c75304f8fad8922a6d62b5e06bd2490.json

@@ -0,0 +1,40 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "SELECT \n                order_id,\n                kot_id,\n                created_time,\n                deleted\n             FROM\n                cqrs_ordering_kot_query\n            WHERE\n                kot_id = $1;",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "order_id",
+        "type_info": "Uuid"
+      },
+      {
+        "ordinal": 1,
+        "name": "kot_id",
+        "type_info": "Uuid"
+      },
+      {
+        "ordinal": 2,
+        "name": "created_time",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 3,
+        "name": "deleted",
+        "type_info": "Bool"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Uuid"
+      ]
+    },
+    "nullable": [
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "ad00213731142dc3853945e02662a93b1c75304f8fad8922a6d62b5e06bd2490"
+}

.sqlx/query-ff85b5343820fb3c30eb5e1efbfe1e4d3a9b9a14c070846c8adb1ca0eaee1f37.json

@@ -0,0 +1,22 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "SELECT EXISTS (\n                SELECT 1\n                    FROM cqrs_ordering_kot_query\n                WHERE\n                    kot_id = $1\n            );",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "exists",
+        "type_info": "Bool"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Uuid"
+      ]
+    },
+    "nullable": [
+      null
+    ]
+  },
+  "hash": "ff85b5343820fb3c30eb5e1efbfe1e4d3a9b9a14c070846c8adb1ca0eaee1f37"
+}

migrations/20240723143757_cqrs_ordering_kot_query.sql

@@ -0,0 +1,16 @@
+-- SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+--
+-- SPDX-License-Identifier: AGPL-3.0-or-later
+
+CREATE TABLE IF NOT EXISTS cqrs_ordering_kot_query
+(
+    version           bigint CHECK (version >= 0) NOT NULL,
+
+    created_time timestamp with time zone DEFAULT (CURRENT_TIMESTAMP) NOT NULL,
+	order_id UUID NOT NULL,
+	kot_id UUID NOT NULL UNIQUE,
+
+	deleted BOOLEAN NOT NULL DEFAULT FALSE,
+
+    PRIMARY KEY (kot_id)
+);

src/ordering/adapters/output/db/errors.rs

@@ -22,8 +22,10 @@ impl From<SqlxError> for OrderingDBError {
 
                 if msg.contains("cqrs_ordering_store_query_line_item_id_key") {
                     return Self::DuplicateLineItemID;
-                } else if msg.contains("cqrs_ordering_store_query_order_id_key") {
+                } else if msg.contains("cqrs_ordering_order_order_id_query") {
                     return Self::DuplicateOrderID;
+                } else if msg.contains("cqrs_ordering_kot_kot_id_query") {
+                    return Self::DuplicateKotID;
                 } else {
                     println!("{msg}");
                 }

src/ordering/adapters/output/db/kot_id_exists.rs

@@ -0,0 +1,83 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use uuid::Uuid;
+
+use super::OrderingDBPostgresAdapter;
+use crate::ordering::application::port::output::db::{errors::*, kot_id_exists::*};
+
+#[async_trait::async_trait]
+impl KotIDExistsDBPort for OrderingDBPostgresAdapter {
+    async fn kot_id_exists(&self, kot_id: &Uuid) -> OrderingDBResult<bool> {
+        let res = sqlx::query!(
+            "SELECT EXISTS (
+                SELECT 1
+                    FROM cqrs_ordering_kot_query
+                WHERE
+                    kot_id = $1
+            );",
+            kot_id
+        )
+        .fetch_one(&self.pool)
+        .await?;
+        if let Some(x) = res.exists {
+            Ok(x)
+        } else {
+            Ok(false)
+        }
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+
+    use super::*;
+    //    use crate::ordering::domain::add_product_command::tests::get_customizations;
+    use crate::ordering::domain::kot_aggregate::*;
+
+    async fn create_dummy_kot(kot: &Kot, db: &OrderingDBPostgresAdapter) {
+        sqlx::query!(
+            "INSERT INTO cqrs_ordering_kot_query (
+                    version,
+                    order_id,
+                    kot_id,
+                    created_time,
+                    deleted
+                ) VALUES (
+                    $1, $2, $3, $4, $5
+                );",
+            1,
+            kot.order_id(),
+            kot.kot_id(),
+            kot.created_time(),
+            kot.deleted().clone(),
+        )
+        .execute(&db.pool)
+        .await
+        .unwrap();
+    }
+
+    #[actix_rt::test]
+    async fn test_postgres_product_exists() {
+        let settings = crate::settings::tests::get_settings().await;
+        settings.create_db().await;
+        let db = super::OrderingDBPostgresAdapter::new(
+            sqlx::postgres::PgPool::connect(&settings.database.url)
+                .await
+                .unwrap(),
+        );
+
+        let kot = Kot::default();
+
+        // state doesn't exist
+        assert!(!db.kot_id_exists(kot.kot_id()).await.unwrap());
+
+        create_dummy_kot(&kot, &db).await;
+
+        // state exists
+        assert!(db.kot_id_exists(kot.kot_id()).await.unwrap());
+
+        settings.drop_db().await;
+    }
+}

src/ordering/adapters/output/db/kot_view.rs

@@ -0,0 +1,225 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use std::str::FromStr;
+
+use async_trait::async_trait;
+use cqrs_es::persist::{PersistenceError, ViewContext, ViewRepository};
+use cqrs_es::{EventEnvelope, Query, View};
+use serde::{Deserialize, Serialize};
+use time::OffsetDateTime;
+use uuid::Uuid;
+
+use super::errors::*;
+use super::OrderingDBPostgresAdapter;
+use crate::ordering::domain::events::OrderingEvent;
+use crate::ordering::domain::kot_aggregate::*;
+use crate::types::quantity::*;
+use crate::utils::parse_aggregate_id::parse_aggregate_id;
+
+pub const NEW_KOT_NON_UUID: &str = "new_kot_non_uuid-asdfa";
+
+// The view for a Kot query, for a standard http application this should
+// be designed to reflect the response dto that will be returned to a user.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct KotView {
+    order_id: Uuid,
+    created_time: OffsetDateTime,
+
+    kot_id: Uuid,
+
+    deleted: bool,
+}
+
+impl Default for KotView {
+    fn default() -> Self {
+        Self {
+            created_time: OffsetDateTime::now_utc(),
+            order_id: Default::default(),
+
+            kot_id: Default::default(),
+
+            deleted: false,
+        }
+    }
+}
+
+impl From<KotView> for Kot {
+    fn from(v: KotView) -> Self {
+        KotBuilder::default()
+            .kot_id(v.kot_id)
+            .created_time(v.created_time)
+            .order_id(v.order_id)
+            .deleted(v.deleted)
+            .build()
+            .unwrap()
+    }
+}
+
+// This updates the view with events as they are committed.
+// The logic should be minimal here, e.g., don't calculate the account balance,
+// design the events to carry the balance information instead.
+impl View<Kot> for KotView {
+    fn update(&mut self, event: &EventEnvelope<Kot>) {
+        match &event.payload {
+            OrderingEvent::KotAdded(val) => {
+                self.order_id = *val.kot().order_id();
+                self.kot_id = *val.kot().kot_id();
+
+                self.created_time = val.kot().created_time().clone();
+
+                self.deleted = false;
+            }
+            _ => (),
+        }
+    }
+}
+
+#[async_trait]
+impl ViewRepository<KotView, Kot> for OrderingDBPostgresAdapter {
+    async fn load(&self, kot_id: &str) -> Result<Option<KotView>, PersistenceError> {
+        let kot_id = match parse_aggregate_id(kot_id, NEW_KOT_NON_UUID)? {
+            Some((val, _)) => return Ok(Some(val)),
+            None => Uuid::parse_str(kot_id).unwrap(),
+        };
+
+        let res = sqlx::query_as!(
+            KotView,
+            "SELECT 
+                order_id,
+                kot_id,
+                created_time,
+                deleted
+             FROM
+                cqrs_ordering_kot_query
+            WHERE
+                kot_id = $1;",
+            kot_id
+        )
+        .fetch_one(&self.pool)
+        .await
+        .map_err(PostgresAggregateError::from)?;
+
+        Ok(Some(res))
+    }
+
+    async fn load_with_context(
+        &self,
+        kot_id: &str,
+    ) -> Result<Option<(KotView, ViewContext)>, PersistenceError> {
+        let kot_id = match parse_aggregate_id(kot_id, NEW_KOT_NON_UUID)? {
+            Some(val) => return Ok(Some(val)),
+            None => Uuid::parse_str(kot_id).unwrap(),
+        };
+
+        let res = sqlx::query_as!(
+            KotView,
+            "SELECT 
+                order_id,
+                kot_id,
+                created_time,
+                deleted
+             FROM
+                cqrs_ordering_kot_query
+            WHERE
+                kot_id = $1;",
+            kot_id
+        )
+        .fetch_one(&self.pool)
+        .await
+        .map_err(PostgresAggregateError::from)?;
+
+        struct Context {
+            version: i64,
+            kot_id: Uuid,
+        }
+
+        let ctx = sqlx::query_as!(
+            Context,
+            "SELECT 
+                kot_id, version
+             FROM
+                cqrs_ordering_kot_query
+            WHERE
+                kot_id = $1;",
+            kot_id
+        )
+        .fetch_one(&self.pool)
+        .await
+        .map_err(PostgresAggregateError::from)?;
+
+        let view_context = ViewContext::new(ctx.kot_id.to_string(), ctx.version);
+        Ok(Some((res, view_context)))
+    }
+
+    async fn update_view(
+        &self,
+        view: KotView,
+        context: ViewContext,
+    ) -> Result<(), PersistenceError> {
+        match context.version {
+            0 => {
+                let version = context.version + 1;
+                sqlx::query!(
+                    "INSERT INTO cqrs_ordering_kot_query (
+                        version,
+                        order_id,
+                        kot_id,
+                        created_time,
+                        deleted
+                    ) VALUES (
+                        $1, $2, $3, $4, $5
+                    );",
+                    version,
+                    view.order_id,
+                    view.kot_id,
+                    view.created_time,
+                    view.deleted,
+                )
+                .execute(&self.pool)
+                .await
+                .map_err(PostgresAggregateError::from)?;
+            }
+
+            _ => {
+                let version = context.version + 1;
+                sqlx::query!(
+                    "UPDATE
+                        cqrs_ordering_kot_query
+                    SET
+                        version = $1,
+                        order_id = $2,
+                        kot_id = $3,
+                        created_time = $4,
+                        deleted = $5;",
+                    version,
+                    view.order_id,
+                    view.kot_id,
+                    view.created_time,
+                    view.deleted,
+                )
+                .execute(&self.pool)
+                .await
+                .map_err(PostgresAggregateError::from)?;
+            }
+        }
+
+        Ok(())
+    }
+}
+
+#[async_trait]
+impl Query<Kot> for OrderingDBPostgresAdapter {
+    async fn dispatch(&self, kot_id: &str, events: &[EventEnvelope<Kot>]) {
+        let res = self
+            .load_with_context(kot_id)
+            .await
+            .unwrap_or_else(|_| Some((KotView::default(), ViewContext::new(kot_id.into(), 0))));
+        let (mut view, view_context): (KotView, ViewContext) = res.unwrap();
+        for event in events {
+            view.update(event);
+        }
+        self.update_view(view, view_context).await.unwrap();
+    }
+}

src/ordering/adapters/output/db/mod.rs

@@ -9,6 +9,8 @@ use sqlx::postgres::PgPool;
 use crate::db::{migrate::RunMigrations, sqlx_postgres::Postgres};
 
 mod errors;
+mod kot_id_exists;
+mod kot_view;
 mod line_item_id_exists;
 mod line_item_view;
 mod order_id_exists;

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

@@ -14,4 +14,6 @@ pub enum OrderingDBError {
     InternalError,
     DuplicateOrderID,
     OrderIDNotFound,
+    DuplicateKotID,
+    KotIDNotFound,
 }

src/ordering/application/port/output/db/kot_id_exists.rs

@@ -0,0 +1,53 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use mockall::predicate::*;
+use mockall::*;
+use uuid::Uuid;
+
+use super::errors::*;
+#[cfg(test)]
+#[allow(unused_imports)]
+pub use tests::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait KotIDExistsDBPort: Send + Sync {
+    async fn kot_id_exists(&self, kot_id: &Uuid) -> OrderingDBResult<bool>;
+}
+
+pub type KotIDExistsDBPortObj = std::sync::Arc<dyn KotIDExistsDBPort>;
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use std::sync::Arc;
+
+    pub fn mock_kot_id_exists_db_port_false(times: Option<usize>) -> KotIDExistsDBPortObj {
+        let mut m = MockKotIDExistsDBPort::new();
+        if let Some(times) = times {
+            m.expect_kot_id_exists()
+                .times(times)
+                .returning(|_| Ok(false));
+        } else {
+            m.expect_kot_id_exists().returning(|_| Ok(false));
+        }
+
+        Arc::new(m)
+    }
+
+    pub fn mock_kot_id_exists_db_port_true(times: Option<usize>) -> KotIDExistsDBPortObj {
+        let mut m = MockKotIDExistsDBPort::new();
+        if let Some(times) = times {
+            m.expect_kot_id_exists()
+                .times(times)
+                .returning(|_| Ok(true));
+        } else {
+            m.expect_kot_id_exists().returning(|_| Ok(true));
+        }
+
+        Arc::new(m)
+    }
+}

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

@@ -3,5 +3,6 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
 pub mod errors;
+pub mod kot_id_exists;
 pub mod line_item_id_exists;
 pub mod order_id_exists;

src/ordering/application/services/add_kot_service.rs

@@ -0,0 +1,129 @@
+// 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::kot_id_exists::*,
+    application::port::output::db::order_id_exists::*,
+    domain::{add_kot_command::*, kot_added_event::*, kot_aggregate::*},
+};
+use crate::utils::uuid::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait AddKotUseCase: Send + Sync {
+    async fn add_kot(&self, cmd: AddKotCommand) -> OrderingResult<KotAddedEvent>;
+}
+
+pub type AddKotServiceObj = Arc<dyn AddKotUseCase>;
+
+#[derive(Clone, Builder)]
+pub struct AddKotService {
+    db_kot_id_exists: KotIDExistsDBPortObj,
+    db_order_id_exists: OrderIDExistsDBPortObj,
+    get_uuid: GetUUIDInterfaceObj,
+}
+
+#[async_trait::async_trait]
+impl AddKotUseCase for AddKotService {
+    async fn add_kot(&self, cmd: AddKotCommand) -> OrderingResult<KotAddedEvent> {
+        if !self
+            .db_order_id_exists
+            .order_id_exists(cmd.order_id())
+            .await?
+        {
+            return Err(OrderingError::OrderIDNotFound);
+        }
+
+        let mut kot_id = self.get_uuid.get_uuid();
+
+        loop {
+            if self.db_kot_id_exists.kot_id_exists(&kot_id).await? {
+                kot_id = self.get_uuid.get_uuid();
+                continue;
+            } else {
+                break;
+            }
+        }
+
+        let kot = KotBuilder::default()
+            .created_time(OffsetDateTime::now_utc())
+            .order_id(*cmd.order_id())
+            .kot_id(kot_id)
+            .deleted(false)
+            .build()
+            .unwrap();
+
+        Ok(KotAddedEventBuilder::default()
+            .added_by_user(*cmd.adding_by())
+            .kot(kot)
+            .build()
+            .unwrap())
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use crate::ordering::domain::kot_added_event::tests::get_added_kot_event_from_command;
+    use crate::utils::uuid::tests::UUID;
+    use crate::{tests::bdd::*, utils::uuid::tests::mock_get_uuid};
+
+    pub fn mock_add_kot_service(times: Option<usize>, cmd: AddKotCommand) -> AddKotServiceObj {
+        let mut m = MockAddKotUseCase::new();
+
+        let res = get_added_kot_event_from_command(&cmd);
+        if let Some(times) = times {
+            m.expect_add_kot()
+                .times(times)
+                .returning(move |_| Ok(res.clone()));
+        } else {
+            m.expect_add_kot().returning(move |_| Ok(res.clone()));
+        }
+
+        Arc::new(m)
+    }
+
+    #[actix_rt::test]
+    async fn test_service() {
+        let cmd = AddKotCommand::get_cmd();
+
+        let s = AddKotServiceBuilder::default()
+            .db_kot_id_exists(mock_kot_id_exists_db_port_false(IS_CALLED_ONLY_ONCE))
+            .db_order_id_exists(mock_order_id_exists_db_port_true(IS_CALLED_ONLY_ONCE))
+            .get_uuid(mock_get_uuid(IS_CALLED_ONLY_ONCE))
+            .build()
+            .unwrap();
+
+        let res = s.add_kot(cmd.clone()).await.unwrap();
+        assert_eq!(res.kot().order_id(), cmd.order_id());
+        assert!(!res.kot().deleted());
+        assert_eq!(res.added_by_user(), cmd.adding_by());
+    }
+
+    #[actix_rt::test]
+    async fn test_service_order_id_doesnt_exist() {
+        let cmd = AddKotCommand::get_cmd();
+
+        let s = AddKotServiceBuilder::default()
+            .db_kot_id_exists(mock_kot_id_exists_db_port_false(IS_NEVER_CALLED))
+            .db_order_id_exists(mock_order_id_exists_db_port_false(IS_CALLED_ONLY_ONCE))
+            .get_uuid(mock_get_uuid(IS_NEVER_CALLED))
+            .build()
+            .unwrap();
+
+        assert_eq!(
+            s.add_kot(cmd.clone()).await,
+            Err(OrderingError::OrderIDNotFound)
+        );
+    }
+}

src/ordering/application/services/errors.rs

@@ -15,6 +15,7 @@ pub enum OrderingError {
     LineItemIDNotFound,
     InternalError,
     OrderIDNotFound,
+    KotIDNotFound,
 }
 //
 impl From<OrderingDBError> for OrderingError {
@@ -30,6 +31,12 @@ impl From<OrderingDBError> for OrderingError {
                 Self::InternalError
             }
             OrderingDBError::OrderIDNotFound => OrderingError::OrderIDNotFound,
+
+            OrderingDBError::DuplicateKotID => {
+                error!("DuplicateKotID");
+                Self::InternalError
+            }
+            OrderingDBError::KotIDNotFound => OrderingError::KotIDNotFound,
             OrderingDBError::InternalError => Self::InternalError,
         }
     }

src/ordering/application/services/mod.rs

@@ -9,6 +9,7 @@ use mockall::*;
 pub mod errors;
 
 //services
+pub mod add_kot_service;
 pub mod add_line_item_service;
 pub mod add_order_service;
 pub mod delete_line_item_service;
@@ -24,6 +25,7 @@ pub trait OrderingServicesInterface: Send + Sync {
     fn add_order(&self) -> add_order_service::AddOrderServiceObj;
     fn update_order(&self) -> update_order_service::UpdateOrderServiceObj;
     fn delete_order(&self) -> delete_order_service::DeleteOrderServiceObj;
+    fn add_kot(&self) -> add_kot_service::AddKotServiceObj;
 }
 
 #[derive(Clone, Builder)]
@@ -34,6 +36,7 @@ pub struct OrderingServices {
     add_order: add_order_service::AddOrderServiceObj,
     update_order: update_order_service::UpdateOrderServiceObj,
     delete_order: delete_order_service::DeleteOrderServiceObj,
+    add_kot: add_kot_service::AddKotServiceObj,
 }
 
 impl OrderingServicesInterface for OrderingServices {
@@ -59,4 +62,8 @@ impl OrderingServicesInterface for OrderingServices {
     fn delete_order(&self) -> delete_order_service::DeleteOrderServiceObj {
         self.delete_order.clone()
     }
+
+    fn add_kot(&self) -> add_kot_service::AddKotServiceObj {
+        self.add_kot.clone()
+    }
 }

src/ordering/domain/add_kot_command.rs

@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use derive_builder::Builder;
+use derive_getters::Getters;
+use serde::{Deserialize, Serialize};
+use time::OffsetDateTime;
+use uuid::Uuid;
+
+#[derive(
+    Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Getters, Builder,
+)]
+pub struct AddKotCommand {
+    adding_by: Uuid,
+
+    #[builder(default = "OffsetDateTime::now_utc()")]
+    created_time: OffsetDateTime,
+    order_id: Uuid,
+}
+
+#[cfg(test)]
+mod tests {
+    use time::macros::datetime;
+
+    use crate::utils::uuid::tests::UUID;
+
+    use super::*;
+
+    impl AddKotCommand {
+        pub fn get_cmd() -> Self {
+            let order_id = UUID;
+            let adding_by = UUID;
+
+            AddKotCommandBuilder::default()
+                .adding_by(adding_by)
+                .created_time(datetime!(1970-01-01 0:00 UTC))
+                .order_id(order_id)
+                .build()
+                .unwrap()
+        }
+    }
+
+    #[test]
+    fn test_cmd() {
+        let order_id = UUID;
+        let adding_by = UUID;
+
+        let cmd = AddKotCommandBuilder::default()
+            .adding_by(adding_by)
+            .order_id(order_id)
+            .build()
+            .unwrap();
+
+        assert_eq!(*cmd.order_id(), order_id);
+        assert_eq!(*cmd.adding_by(), adding_by);
+    }
+}

src/ordering/domain/commands.rs

@@ -6,9 +6,10 @@ use mockall::predicate::*;
 use serde::{Deserialize, Serialize};
 
 use super::{
-    add_line_item_command::AddLineItemCommand, add_order_command::AddOrderCommand,
+    add_kot_command::AddKotCommand, add_line_item_command::AddLineItemCommand,
-    delete_line_item_command::DeleteLineItemCommand, delete_order_command::DeleteOrderCommand,
+    add_order_command::AddOrderCommand, delete_line_item_command::DeleteLineItemCommand,
-    update_line_item_command::UpdateLineItemCommand, update_order_command::UpdateOrderCommand,
+    delete_order_command::DeleteOrderCommand, update_line_item_command::UpdateLineItemCommand,
+    update_order_command::UpdateOrderCommand,
 };
 
 #[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd)]
@@ -19,4 +20,5 @@ pub enum OrderingCommand {
     AddOrder(AddOrderCommand),
     UpdateOrder(UpdateOrderCommand),
     DeleteOrder(DeleteOrderCommand),
+    AddKot(AddKotCommand),
 }

src/ordering/domain/events.rs

@@ -6,9 +6,10 @@ use cqrs_es::DomainEvent;
 use serde::{Deserialize, Serialize};
 
 use super::{
-    line_item_added_event::LineItemAddedEvent, line_item_deleted_event::LineItemDeletedEvent,
+    kot_added_event::KotAddedEvent, line_item_added_event::LineItemAddedEvent,
-    line_item_updated_event::LineItemUpdatedEvent, order_added_event::OrderAddedEvent,
+    line_item_deleted_event::LineItemDeletedEvent, line_item_updated_event::LineItemUpdatedEvent,
-    order_deleted_event::OrderDeletedEvent, order_updated_event::OrderUpdatedEvent,
+    order_added_event::OrderAddedEvent, order_deleted_event::OrderDeletedEvent,
+    order_updated_event::OrderUpdatedEvent,
 };
 
 #[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd)]
@@ -19,6 +20,7 @@ pub enum OrderingEvent {
     OrderAdded(OrderAddedEvent),
     OrderUpdated(OrderUpdatedEvent),
     OrderDeleted(OrderDeletedEvent),
+    KotAdded(KotAddedEvent),
 }
 
 impl DomainEvent for OrderingEvent {
@@ -34,6 +36,7 @@ impl DomainEvent for OrderingEvent {
             OrderingEvent::OrderAdded { .. } => "OrderingOrderAdded",
             OrderingEvent::OrderUpdated { .. } => "OrderingOrderUpdated",
             OrderingEvent::OrderDeleted { .. } => "OrderingOrderDeleted",
+            OrderingEvent::KotAdded { .. } => "OrderingKotAdded",
         };
 
         e.to_string()

src/ordering/domain/kot_added_event.rs

@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use derive_builder::Builder;
+use derive_getters::Getters;
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use super::kot_aggregate::Kot;
+
+#[derive(
+    Clone, Debug, Builder, Serialize, Deserialize, Getters, Eq, PartialEq, Ord, PartialOrd,
+)]
+pub struct KotAddedEvent {
+    added_by_user: Uuid,
+
+    kot: Kot,
+}
+
+#[cfg(test)]
+pub mod tests {
+    use crate::ordering::domain::add_kot_command::AddKotCommand;
+
+    use super::*;
+
+    pub fn get_added_kot_event_from_command(cmd: &AddKotCommand) -> KotAddedEvent {
+        let kot = Kot::get_kot();
+
+        KotAddedEventBuilder::default()
+            .added_by_user(cmd.adding_by().clone())
+            .kot(kot)
+            .build()
+            .unwrap()
+    }
+
+    #[test]
+    fn test_event() {
+        get_added_kot_event_from_command(&AddKotCommand::get_cmd());
+    }
+}

src/ordering/domain/kot_aggregate.rs

@@ -10,7 +10,10 @@ use serde::{Deserialize, Serialize};
 use time::OffsetDateTime;
 use uuid::Uuid;
 
-use super::line_item_aggregate::*;
+use crate::ordering::{
+    application::services::{errors::*, *},
+    domain::{commands::*, events::*},
+};
 
 #[derive(
     Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Builder, Getters,
@@ -18,9 +21,170 @@ use super::line_item_aggregate::*;
 pub struct Kot {
     #[builder(default = "OffsetDateTime::now_utc()")]
     created_time: OffsetDateTime,
-    line_items: Vec<LineItem>,
+    //    kots: Vec<Kot>,
     kot_id: Uuid,
     order_id: Uuid,
     #[builder(default = "false")]
     deleted: bool,
 }
+
+impl Default for Kot {
+    fn default() -> Self {
+        Self {
+            created_time: OffsetDateTime::now_utc(),
+            order_id: Default::default(),
+            kot_id: Default::default(),
+            deleted: false,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{ordering::domain::add_kot_command::AddKotCommand, utils::uuid::tests::UUID};
+
+    use super::*;
+
+    impl Kot {
+        pub fn get_kot() -> Self {
+            let cmd = AddKotCommand::get_cmd();
+
+            KotBuilder::default()
+                .created_time(cmd.created_time().clone())
+                .order_id(*cmd.order_id())
+                .kot_id(UUID)
+                .build()
+                .unwrap()
+        }
+    }
+}
+
+#[async_trait]
+impl Aggregate for Kot {
+    type Command = OrderingCommand;
+    type Event = OrderingEvent;
+    type Error = OrderingError;
+    type Services = std::sync::Arc<dyn OrderingServicesInterface>;
+
+    // This identifier should be unique to the system.
+    fn aggregate_type() -> String {
+        "ordering.kot".to_string()
+    }
+
+    // The aggregate logic goes here. Note that this will be the _bulk_ of a CQRS system
+    // so expect to use helper functions elsewhere to keep the code clean.
+    async fn handle(
+        &self,
+        command: Self::Command,
+        services: &Self::Services,
+    ) -> Result<Vec<Self::Event>, Self::Error> {
+        match command {
+            OrderingCommand::AddKot(cmd) => {
+                let res = services.add_kot().add_kot(cmd).await?;
+                Ok(vec![OrderingEvent::KotAdded(res)])
+            }
+            //OrderingCommand::UpdateKot(cmd) => {
+            //    let res = services.update_kot().update_kot(cmd).await?;
+            //    Ok(vec![OrderingEvent::KotUpdated(res)])
+            //}
+            //OrderingCommand::DeleteKot(cmd) => {
+            //    let res = services.delete_kot().delete_kot(cmd).await?;
+            //    Ok(vec![OrderingEvent::KotDeleted(res)])
+            //}
+            _ => Ok(Vec::default()),
+        }
+    }
+
+    fn apply(&mut self, event: Self::Event) {
+        match event {
+            OrderingEvent::KotAdded(e) => *self = e.kot().clone(),
+            //OrderingEvent::KotUpdated(e) => *self = e.new_kot().clone(),
+            //OrderingEvent::KotDeleted(e) => *self = e.kot().clone(),
+            _ => (),
+        }
+    }
+}
+
+#[cfg(test)]
+mod aggregate_tests {
+    use std::sync::Arc;
+
+    use add_kot_service::tests::mock_add_kot_service;
+    use cqrs_es::test::TestFramework;
+    //    use delete_kot_service::tests::mock_delete_kot_service;
+    //    use update_kot_service::tests::mock_update_kot_service;
+
+    use super::*;
+
+    //    use crate::ordering::domain::delete_kot_command::DeleteKotCommand;
+    //    use crate::ordering::domain::kot_deleted_event::tests::get_deleted_kot_event_from_command;
+    //    use crate::ordering::domain::kot_updated_event::tests::get_updated_kot_event_from_command;
+    //    use crate::ordering::domain::update_kot_command::UpdateKotCommand;
+    use crate::tests::bdd::*;
+
+    use crate::ordering::domain::{
+        add_kot_command::*, kot_added_event::tests::get_added_kot_event_from_command,
+    };
+
+    type KotTestFramework = TestFramework<Kot>;
+
+    #[test]
+    fn test_add_kot() {
+        let cmd = AddKotCommand::get_cmd();
+        let expected = get_added_kot_event_from_command(&cmd);
+        let expected = OrderingEvent::KotAdded(expected);
+
+        let mut services = MockOrderingServicesInterface::new();
+        services
+            .expect_add_kot()
+            .times(IS_CALLED_ONLY_ONCE.unwrap())
+            .return_const(mock_add_kot_service(IS_CALLED_ONLY_ONCE, cmd.clone()));
+
+        KotTestFramework::with(Arc::new(services))
+            .given_no_previous_events()
+            .when(OrderingCommand::AddKot(cmd))
+            .then_expect_events(vec![expected]);
+    }
+
+    //    #[test]
+    //    fn test_update_kot() {
+    //        let cmd = UpdateKotCommand::get_cmd();
+    //        let expected = get_updated_kot_event_from_command(&cmd);
+    //        let expected = OrderingEvent::KotUpdated(expected);
+    //
+    //        let mut services = MockOrderingServicesInterface::new();
+    //        services
+    //            .expect_update_kot()
+    //            .times(IS_CALLED_ONLY_ONCE.unwrap())
+    //            .return_const(mock_update_kot_service(
+    //                IS_CALLED_ONLY_ONCE,
+    //                cmd.clone(),
+    //            ));
+    //
+    //        KotTestFramework::with(Arc::new(services))
+    //            .given_no_previous_events()
+    //            .when(OrderingCommand::UpdateKot(cmd))
+    //            .then_expect_events(vec![expected]);
+    //    }
+    //
+    //    #[test]
+    //    fn test_delete_kot() {
+    //        let cmd = DeleteKotCommand::get_cmd();
+    //        let expected = get_deleted_kot_event_from_command(&cmd);
+    //        let expected = OrderingEvent::KotDeleted(expected);
+    //
+    //        let mut services = MockOrderingServicesInterface::new();
+    //        services
+    //            .expect_delete_kot()
+    //            .times(IS_CALLED_ONLY_ONCE.unwrap())
+    //            .return_const(mock_delete_kot_service(
+    //                IS_CALLED_ONLY_ONCE,
+    //                cmd.clone(),
+    //            ));
+    //
+    //        KotTestFramework::with(Arc::new(services))
+    //            .given_no_previous_events()
+    //            .when(OrderingCommand::DeleteKot(cmd))
+    //            .then_expect_events(vec![expected]);
+    //    }
+}

src/ordering/domain/mod.rs

@@ -8,6 +8,7 @@ pub mod line_item_aggregate;
 pub mod order_aggregate;
 
 // commands
+pub mod add_kot_command;
 pub mod add_line_item_command;
 pub mod add_order_command;
 pub mod commands;
@@ -18,6 +19,7 @@ pub mod update_order_command;
 
 // events
 pub mod events;
+pub mod kot_added_event;
 pub mod line_item_added_event;
 pub mod line_item_deleted_event;
 pub mod line_item_updated_event;