feat: identity: register_user service

src/identity/application/services/register_user/events.rs

@@ -1,11 +1,18 @@
-use derive_getters::Getters;
+// 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};
 
-#[derive(Clone, Debug, Builder, Serialize, Deserialize, Getters, Eq, PartialEq, Ord, PartialOrd)]
+#[derive(
+    Clone, Debug, Builder, Serialize, Deserialize, Getters, Eq, PartialEq, Ord, PartialOrd,
+)]
 pub struct UserRegisteredEvent {
     username: String,
     email: String,
     hashed_password: String,
     is_verified: bool,
+    is_admin: bool,
 }

src/identity/application/services/register_user/mod.rs

@@ -7,11 +7,12 @@ pub mod error;
 pub mod events;
 pub mod service;
 
+use super::errors::*;
+
 #[async_trait::async_trait]
-pub trait RegisterUserUseCase {
+pub trait RegisterUserUseCase: Send + Sync {
     async fn register_user(
         &self,
         cmd: command::RegisterUserCommand,
-        //) -> errors::ProcessAuthorizationServiceResult<String>;
+    ) -> IdentityResult<events::UserRegisteredEvent>;
-    ) -> events::UserRegisteredEvent;
 }

src/identity/application/services/register_user/service.rs

@@ -5,27 +5,81 @@
 // - Hash password
 // - Add user record
 // - Send verification email
-// - If UID == 0; set admin
+// - TODO: If UID == 0; set admin
+use derive_builder::Builder;
 
 use super::*;
+use crate::identity::application::port::output::{
+    db::{create_verification_secret::*, email_exists::*, username_exists::*},
+    mailer::account_validation_link::*,
+};
+use crate::utils::random_string::*;
 
-struct RegisterUserService;
+pub const SECRET_LEN: usize = 20;
+pub const REGISTRATION_SECRET_PURPOSE: &str = "account_validation";
+
+#[derive(Builder)]
+pub struct RegisterUserService {
+    db_email_exists_adapter: EmailExistsOutDBPortObj,
+    db_username_exists_adapter: UsernameExistsOutDBPortObj,
+    db_create_verification_secret_adapter: CreateVerificationSecretOutDBPortObj,
+    mailer_account_validation_link_adapter: AccountValidationLinkOutMailerPortObj,
+    random_string_adapter: GenerateRandomStringInterfaceObj,
+}
 
 #[async_trait::async_trait]
 impl RegisterUserUseCase for RegisterUserService {
     async fn register_user(
         &self,
         cmd: command::RegisterUserCommand,
-        //) -> errors::ProcessAuthorizationServiceResult<String>;
+    ) -> IdentityResult<events::UserRegisteredEvent> {
-    ) -> events::UserRegisteredEvent {
+        if self
+            .db_username_exists_adapter
+            .username_exists(cmd.username())
+            .await
+            .unwrap()
+        {
+            return Err(IdentityError::UsernameExists);
+        }
 
-        events::UserRegisteredEventBuilder::default()
+        if self
+            .db_email_exists_adapter
+            .email_exists(cmd.email())
+            .await
+            .unwrap()
+        {
+            return Err(IdentityError::EmailExists);
+        }
+
+        let secret = self.random_string_adapter.get_random(SECRET_LEN);
+
+        self.db_create_verification_secret_adapter
+            .create_verification_secret(
+                CreateSecretMsgBuilder::default()
+                    .secret(secret.clone())
+                    .purpose(REGISTRATION_SECRET_PURPOSE.into())
+                    .username(cmd.username().into())
+                    .build()
+                    .unwrap(),
+            )
+            .await
+            .unwrap();
+
+        self.mailer_account_validation_link_adapter
+            .account_validation_link(cmd.email(), cmd.username(), &secret)
+            .await
+            .unwrap();
+
+        // TODO: send mail verification link
+
+        Ok(events::UserRegisteredEventBuilder::default()
             .username(cmd.username().into())
             .email(cmd.email().into())
             .hashed_password(cmd.hashed_password().into())
             .is_verified(false)
-            .build().unwrap()
+            .is_admin(false) // TODO: if UID == 0; set true
-
+            .build()
+            .unwrap())
     }
 }
 
@@ -33,6 +87,9 @@ impl RegisterUserUseCase for RegisterUserService {
 mod tests {
     use super::*;
 
+    use crate::tests::bdd::*;
+    use crate::utils::random_string::tests::*;
+
     #[actix_rt::test]
     async fn test_service() {
         let username = "realaravinth";
@@ -45,13 +102,95 @@ mod tests {
             password.into(),
             password.into(),
             &config,
-        );
+        )
+        .unwrap();
 
-        let s = RegisterUserService;
+        // happy case
-        let res = s.register_user(cmd.clone()).await;
+        {
+            let s = RegisterUserServiceBuilder::default()
+                .db_username_exists_adapter(mock_username_exists_db_port(
+                    IS_CALLED_ONLY_ONCE,
+                    RETURNS_FALSE,
+                ))
+                .db_create_verification_secret_adapter(mock_create_verification_secret_db_port(
+                    IS_CALLED_ONLY_ONCE,
+                ))
+                .db_email_exists_adapter(mock_email_exists_db_port(
+                    IS_CALLED_ONLY_ONCE,
+                    RETURNS_FALSE,
+                ))
+                .random_string_adapter(mock_generate_random_string(
+                    IS_CALLED_ONLY_ONCE,
+                    RETURNS_RANDOM_STRING.into(),
+                ))
+                .mailer_account_validation_link_adapter(mock_account_validation_link_db_port(
+                    IS_CALLED_ONLY_ONCE,
+                ))
+                .build()
+                .unwrap();
+
+            let res = s.register_user(cmd.clone()).await.unwrap();
             assert_eq!(res.username(), cmd.username());
             assert_eq!(res.email(), cmd.email());
+            assert!(!res.is_admin());
             assert!(argon2_creds::Config::verify(res.hashed_password(), password).unwrap())
+        }
 
+        // username exists
+        {
+            let s = RegisterUserServiceBuilder::default()
+                .db_username_exists_adapter(mock_username_exists_db_port(
+                    IS_CALLED_ONLY_ONCE,
+                    RETURNS_TRUE,
+                ))
+                .db_email_exists_adapter(mock_email_exists_db_port(IS_NEVER_CALLED, RETURNS_FALSE))
+                .db_create_verification_secret_adapter(mock_create_verification_secret_db_port(
+                    IS_NEVER_CALLED,
+                ))
+                .random_string_adapter(mock_generate_random_string(
+                    IS_NEVER_CALLED,
+                    RETURNS_RANDOM_STRING.into(),
+                ))
+                .mailer_account_validation_link_adapter(mock_account_validation_link_db_port(
+                    IS_NEVER_CALLED,
+                ))
+                .build()
+                .unwrap();
+
+            assert_eq!(
+                s.register_user(cmd.clone()).await.err(),
+                Some(IdentityError::UsernameExists)
+            );
+        }
+
+        // email exists
+        {
+            let s = RegisterUserServiceBuilder::default()
+                .db_username_exists_adapter(mock_username_exists_db_port(
+                    IS_CALLED_ONLY_ONCE,
+                    RETURNS_FALSE,
+                ))
+                .db_create_verification_secret_adapter(mock_create_verification_secret_db_port(
+                    IS_NEVER_CALLED,
+                ))
+                .db_email_exists_adapter(mock_email_exists_db_port(
+                    IS_CALLED_ONLY_ONCE,
+                    RETURNS_TRUE,
+                ))
+                .random_string_adapter(mock_generate_random_string(
+                    IS_NEVER_CALLED,
+                    RETURNS_RANDOM_STRING.into(),
+                ))
+                .mailer_account_validation_link_adapter(mock_account_validation_link_db_port(
+                    IS_NEVER_CALLED,
+                ))
+                .build()
+                .unwrap();
+
+            assert_eq!(
+                s.register_user(cmd.clone()).await.err(),
+                Some(IdentityError::EmailExists)
+            );
+        }
     }
 }