src/inventory/domain/add_product_command.rs

@@ -0,0 +1,224 @@
+// 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 derive_more::{Display, Error};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use super::product_aggregate::Price;
+
+#[derive(Debug, Error, Display, Clone, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
+pub enum AddProductCommandError {
+    NameIsEmpty,
+}
+
+#[derive(
+    Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Getters, Builder,
+)]
+pub struct UnvalidatedAddProductCommand {
+    name: String,
+    description: Option<String>,
+    image: Option<String>,
+    category_id: Uuid,
+    sku_able: bool,
+    price: Price,
+    adding_by: Uuid,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Getters)]
+pub struct AddProductCommand {
+    name: String,
+    description: Option<String>,
+    image: Option<String>,
+    category_id: Uuid,
+    sku_able: bool,
+    price: Price,
+    adding_by: Uuid,
+}
+
+impl UnvalidatedAddProductCommand {
+    pub fn validate(self) -> Result<AddProductCommand, AddProductCommandError> {
+        let description: Option<String> = if let Some(description) = self.description {
+            let description = description.trim();
+            if description.is_empty() {
+                None
+            } else {
+                Some(description.to_owned())
+            }
+        } else {
+            None
+        };
+
+        let image: Option<String> = if let Some(image) = self.image {
+            let image = image.trim();
+            if image.is_empty() {
+                None
+            } else {
+                Some(image.to_owned())
+            }
+        } else {
+            None
+        };
+
+        let name = self.name.trim().to_owned();
+        if name.is_empty() {
+            return Err(AddProductCommandError::NameIsEmpty);
+        }
+
+        Ok(AddProductCommand {
+            name,
+            description,
+            image,
+            category_id: self.category_id,
+            sku_able: self.sku_able,
+            price: self.price,
+            adding_by: self.adding_by,
+        })
+    }
+}
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use crate::{
+        inventory::domain::product_aggregate::{Currency, PriceBuilder},
+        utils::uuid::tests::UUID,
+    };
+
+    pub fn get_command() -> AddProductCommand {
+        let name = "foo";
+        let adding_by = UUID;
+        let category_id = Uuid::new_v4();
+        let sku_able = false;
+        let image = Some("image".to_string());
+        let description = Some("description".to_string());
+
+        let price = PriceBuilder::default()
+            .minor(0)
+            .major(100)
+            .currency(Currency::INR)
+            .build()
+            .unwrap();
+
+        let cmd = UnvalidatedAddProductCommandBuilder::default()
+            .name(name.into())
+            .description(description.clone())
+            .image(image.clone())
+            .category_id(category_id.clone())
+            .adding_by(adding_by.clone())
+            .sku_able(sku_able)
+            .price(price.clone())
+            .build()
+            .unwrap();
+
+        cmd.validate().unwrap()
+    }
+
+    #[test]
+    fn test_description_and_image_none() {
+        let name = "foo";
+        let adding_by = UUID;
+        let category_id = Uuid::new_v4();
+        let sku_able = false;
+
+        let price = PriceBuilder::default()
+            .minor(0)
+            .major(100)
+            .currency(Currency::INR)
+            .build()
+            .unwrap();
+
+        // description = None
+        let cmd = UnvalidatedAddProductCommandBuilder::default()
+            .name(name.into())
+            .description(None)
+            .image(None)
+            .category_id(category_id.clone())
+            .adding_by(adding_by.clone())
+            .sku_able(sku_able)
+            .price(price.clone())
+            .build()
+            .unwrap();
+
+        let cmd = cmd.validate().unwrap();
+
+        assert_eq!(cmd.name(), name);
+        assert_eq!(cmd.description(), &None);
+        assert_eq!(cmd.adding_by(), &adding_by);
+        assert_eq!(cmd.category_id(), &category_id);
+        assert_eq!(cmd.image(), &None);
+        assert_eq!(cmd.sku_able(), &sku_able);
+        assert_eq!(cmd.price(), &price);
+    }
+    #[test]
+    fn test_description_some() {
+        let name = "foo";
+        let adding_by = UUID;
+        let category_id = Uuid::new_v4();
+        let sku_able = false;
+        let image = Some("image".to_string());
+        let description = Some("description".to_string());
+
+        let price = PriceBuilder::default()
+            .minor(0)
+            .major(100)
+            .currency(Currency::INR)
+            .build()
+            .unwrap();
+
+        let cmd = UnvalidatedAddProductCommandBuilder::default()
+            .name(name.into())
+            .description(description.clone())
+            .image(image.clone())
+            .category_id(category_id.clone())
+            .adding_by(adding_by.clone())
+            .sku_able(sku_able)
+            .price(price.clone())
+            .build()
+            .unwrap();
+
+        let cmd = cmd.validate().unwrap();
+
+        assert_eq!(cmd.name(), name);
+        assert_eq!(cmd.description(), &description);
+        assert_eq!(cmd.adding_by(), &adding_by);
+        assert_eq!(cmd.category_id(), &category_id);
+        assert_eq!(cmd.image(), &image);
+        assert_eq!(cmd.sku_able(), &sku_able);
+        assert_eq!(cmd.price(), &price);
+    }
+
+    #[test]
+    fn test_name_is_empty() {
+        let adding_by = UUID;
+        let category_id = Uuid::new_v4();
+        let sku_able = false;
+        let image = Some("image".to_string());
+        let description = Some("description".to_string());
+
+        let price = PriceBuilder::default()
+            .minor(0)
+            .major(100)
+            .currency(Currency::INR)
+            .build()
+            .unwrap();
+
+        let cmd = UnvalidatedAddProductCommandBuilder::default()
+            .name("".into())
+            .description(description.clone())
+            .image(image.clone())
+            .category_id(category_id.clone())
+            .adding_by(adding_by.clone())
+            .sku_able(sku_able)
+            .price(price.clone())
+            .build()
+            .unwrap();
+
+        // AddProductCommandError::NameIsEmpty
+        assert_eq!(cmd.validate(), Err(AddProductCommandError::NameIsEmpty))
+    }
+}

src/inventory/domain/commands.rs

@@ -5,10 +5,14 @@
 use mockall::predicate::*;
 use serde::{Deserialize, Serialize};
 
-use super::{add_category_command::AddCategoryCommand, add_store_command::AddStoreCommand};
+use super::{
+    add_category_command::AddCategoryCommand, add_product_command::AddProductCommand,
+    add_store_command::AddStoreCommand,
+};
 
 #[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd)]
 pub enum InventoryCommand {
     AddCategory(AddCategoryCommand),
     AddStore(AddStoreCommand),
+    AddProduct(AddProductCommand),
 }

src/inventory/domain/events.rs

@@ -5,16 +5,18 @@
 use cqrs_es::DomainEvent;
 use serde::{Deserialize, Serialize};
 
-use super::{category_added_event::*, store_added_event::StoreAddedEvent};
+use super::{
+    category_added_event::*, product_added_event::ProductAddedEvent,
+    store_added_event::StoreAddedEvent,
+};
 
 #[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd)]
 pub enum InventoryEvent {
     CategoryAdded(CategoryAddedEvent),
     StoreAdded(StoreAddedEvent),
+    ProductAdded(ProductAddedEvent),
 }
 
-//TODO: define password type that takes string and converts to hash
-
 impl DomainEvent for InventoryEvent {
     fn event_version(&self) -> String {
         "1.0".to_string()
@@ -23,7 +25,8 @@ impl DomainEvent for InventoryEvent {
     fn event_type(&self) -> String {
         let e: &str = match self {
             InventoryEvent::CategoryAdded { .. } => "InventoryCategoryAdded",
-            InventoryEvent::StoreAdded { .. } => "InventoryStoredded",
+            InventoryEvent::StoreAdded { .. } => "InventoryStoreAdded",
+            InventoryEvent::ProductAdded { .. } => "InventoryProductAdded",
         };
 
         e.to_string()

src/inventory/domain/mod.rs

@@ -3,18 +3,19 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
 // aggregates
-//pub mod money_aggregate;
-//pub mod product_aggregate;
 pub mod category_aggregate;
+pub mod product_aggregate;
 //pub mod stock_aggregate;
 pub mod store_aggregate;
 
 // commands
 pub mod add_category_command;
+pub mod add_product_command;
 pub mod add_store_command;
 pub mod commands;
 
 // events
 pub mod category_added_event;
 pub mod events;
+pub mod product_added_event;
 pub mod store_added_event;

src/inventory/domain/product_added_event.rs

@@ -0,0 +1,48 @@
+// 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::product_aggregate::Price;
+
+#[derive(
+    Clone, Debug, Builder, Serialize, Deserialize, Getters, Eq, PartialEq, Ord, PartialOrd,
+)]
+pub struct ProductAddedEvent {
+    added_by_user: Uuid,
+
+    name: String,
+    description: Option<String>,
+    image: Option<String>, // string = file_name
+    price: Price,
+    category_id: Uuid,
+    sku_able: bool,
+    product_id: Uuid,
+}
+
+#[cfg(test)]
+pub mod tests {
+    use crate::inventory::domain::add_product_command::AddProductCommand;
+
+    use super::*;
+
+    use crate::utils::uuid::tests::UUID;
+
+    pub fn get_event_from_command(cmd: &AddProductCommand) -> ProductAddedEvent {
+        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()
+    }
+}

src/inventory/domain/product_aggregate.rs

@@ -0,0 +1,165 @@
+// 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::Aggregate;
+use derive_builder::Builder;
+use derive_getters::Getters;
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+use super::{commands::InventoryCommand, events::InventoryEvent};
+use crate::inventory::application::services::errors::*;
+use crate::inventory::application::services::InventoryServicesInterface;
+
+#[derive(
+    Clone, Debug, Default, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Getters, Builder,
+)]
+pub struct Product {
+    name: String,
+    description: Option<String>,
+    image: Option<String>, // string = file_name
+    price: Price,
+    category_id: Uuid,
+    sku_able: bool,
+    product_id: Uuid,
+}
+
+#[derive(
+    Clone, Default, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd, Getters, Builder,
+)]
+pub struct Price {
+    major: usize,
+    minor: usize,
+    currency: Currency,
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, Eq, PartialEq, Ord, PartialOrd)]
+pub enum Currency {
+    INR,
+}
+
+impl ToString for Currency {
+    fn to_string(&self) -> String {
+        match self {
+            Self::INR => "INR".into(),
+        }
+    }
+}
+
+impl FromStr for Currency {
+    type Err = String;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let s = s.trim();
+        let inr = Self::INR.to_string();
+        match s {
+            inr => Ok(Self::INR),
+            _ => Err("Currency unsupported".into()),
+        }
+    }
+}
+
+impl Default for Currency {
+    fn default() -> Self {
+        Self::INR
+    }
+}
+
+#[async_trait]
+impl Aggregate for Product {
+    type Command = InventoryCommand;
+    type Event = InventoryEvent;
+    type Error = InventoryError;
+    type Services = std::sync::Arc<dyn InventoryServicesInterface>;
+
+    // This identifier should be unique to the system.
+    fn aggregate_type() -> String {
+        "inventory.product".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 {
+            InventoryCommand::AddProduct(cmd) => {
+                let res = services.add_product().add_product(cmd).await?;
+                Ok(vec![InventoryEvent::ProductAdded(res)])
+            }
+            _ => Ok(Vec::default()),
+        }
+    }
+
+    fn apply(&mut self, event: Self::Event) {
+        match event {
+            InventoryEvent::ProductAdded(e) => {
+                *self = ProductBuilder::default()
+                    .name(e.name().into())
+                    .description(e.description().clone())
+                    .image(e.image().clone())
+                    .price(e.price().clone())
+                    .category_id(e.category_id().clone())
+                    .sku_able(e.sku_able().clone())
+                    .product_id(e.product_id().clone())
+                    .build()
+                    .unwrap();
+            }
+            _ => (),
+        }
+    }
+}
+
+#[cfg(test)]
+mod aggregate_tests {
+    use std::sync::Arc;
+
+    use cqrs_es::test::TestFramework;
+
+    use super::*;
+    use crate::inventory::{
+        application::services::{add_product_service::tests::*, *},
+        domain::{
+            add_product_command::tests::get_command, commands::InventoryCommand,
+            events::InventoryEvent, product_added_event::tests::get_event_from_command,
+        },
+    };
+    use crate::tests::bdd::*;
+
+    type ProductTestFramework = TestFramework<Product>;
+
+    #[test]
+    fn test_create_product() {
+        let cmd = get_command();
+        let expected = get_event_from_command(&cmd);
+        let expected = InventoryEvent::ProductAdded(expected);
+
+        let mut services = MockInventoryServicesInterface::new();
+        services
+            .expect_add_product()
+            .times(IS_CALLED_ONLY_ONCE.unwrap())
+            .return_const(mock_add_product_service(IS_CALLED_ONLY_ONCE, cmd.clone()));
+
+        ProductTestFramework::with(Arc::new(services))
+            .given_no_previous_events()
+            .when(InventoryCommand::AddProduct(cmd))
+            .then_expect_events(vec![expected]);
+    }
+
+    #[test]
+    fn currency_to_string_from_str() {
+        assert_eq!(Currency::INR.to_string(), "INR".to_string());
+
+        assert_eq!(Currency::from_str("INR").unwrap(), Currency::INR);
+
+        assert_eq!(
+            Currency::from_str(Currency::INR.to_string().as_str()).unwrap(),
+            Currency::INR
+        );
+    }
+}