feat: add is_admin to User, count_users, ProviderConfigRepository trait, admin migration

k-tv-backend/domain/src/entities.rs

@@ -22,6 +22,7 @@ pub struct User {
     pub subject: String,
     pub email: Email,
     pub password_hash: Option<String>,
+    pub is_admin: bool,
     pub created_at: DateTime<Utc>,
 }
 
@@ -32,6 +33,7 @@ impl User {
             subject: subject.into(),
             email,
             password_hash: None,
+            is_admin: false,
             created_at: Utc::now(),
         }
     }
@@ -41,6 +43,7 @@ impl User {
         subject: impl Into<String>,
         email: Email,
         password_hash: Option<String>,
+        is_admin: bool,
         created_at: DateTime<Utc>,
     ) -> Self {
         Self {
@@ -48,6 +51,7 @@ impl User {
             subject: subject.into(),
             email,
             password_hash,
+            is_admin,
             created_at,
         }
     }
@@ -58,6 +62,7 @@ impl User {
             subject: format!("local|{}", Uuid::new_v4()),
             email,
             password_hash: Some(password_hash.into()),
+            is_admin: false,
             created_at: Utc::now(),
         }
     }

k-tv-backend/domain/src/repositories.rs

@@ -39,6 +39,24 @@ pub trait UserRepository: Send + Sync {
 
     /// Delete a user by their ID
     async fn delete(&self, id: Uuid) -> DomainResult<()>;
+
+    /// Count total number of users (used for first-user admin promotion)
+    async fn count_users(&self) -> DomainResult<u64>;
+}
+
+#[derive(Debug, Clone)]
+pub struct ProviderConfigRow {
+    pub provider_type: String,
+    pub config_json: String,
+    pub enabled: bool,
+    pub updated_at: String,
+}
+
+#[async_trait]
+pub trait ProviderConfigRepository: Send + Sync {
+    async fn get_all(&self) -> DomainResult<Vec<ProviderConfigRow>>;
+    async fn upsert(&self, row: &ProviderConfigRow) -> DomainResult<()>;
+    async fn delete(&self, provider_type: &str) -> DomainResult<()>;
 }
 
 /// Repository port for `Channel` persistence.

k-tv-backend/domain/src/services/user.rs

@@ -31,7 +31,10 @@ impl UserService {
         }
 
         let email = Email::try_from(email)?;
-        let user = User::new(subject, email);
+        let mut user = User::new(subject, email);
+        if self.user_repository.count_users().await? == 0 {
+            user.is_admin = true;
+        }
         self.user_repository.save(&user).await?;
         Ok(user)
     }
@@ -53,7 +56,10 @@ impl UserService {
         password_hash: &str,
     ) -> DomainResult<User> {
         let email = Email::try_from(email)?;
-        let user = User::new_local(email, password_hash);
+        let mut user = User::new_local(email, password_hash);
+        if self.user_repository.count_users().await? == 0 {
+            user.is_admin = true;
+        }
         self.user_repository.save(&user).await?;
         Ok(user)
     }