adapter-postgres: all repository implementations

crates/adapters/postgres/src/settings.rs

@@ -0,0 +1,50 @@
+//! PostgreSQL adapter for app settings (AppSettingsRepository).
+
+use async_trait::async_trait;
+use sqlx::PgPool;
+
+use domain::{
+    ports::settings::AppSettingsRepository,
+    DomainError, DomainResult,
+};
+
+pub struct PgAppSettings {
+    pool: PgPool,
+}
+
+impl PgAppSettings {
+    pub fn new(pool: PgPool) -> Self {
+        Self { pool }
+    }
+}
+
+#[async_trait]
+impl AppSettingsRepository for PgAppSettings {
+    async fn get(&self, key: &str) -> DomainResult<Option<String>> {
+        sqlx::query_scalar::<_, String>("SELECT value FROM app_settings WHERE key = $1")
+            .bind(key)
+            .fetch_optional(&self.pool)
+            .await
+            .map_err(|e| DomainError::InfrastructureError(e.to_string()))
+    }
+
+    async fn set(&self, key: &str, value: &str) -> DomainResult<()> {
+        sqlx::query(
+            "INSERT INTO app_settings (key, value) VALUES ($1, $2)
+             ON CONFLICT(key) DO UPDATE SET value = EXCLUDED.value",
+        )
+        .bind(key)
+        .bind(value)
+        .execute(&self.pool)
+        .await
+        .map(|_| ())
+        .map_err(|e| DomainError::InfrastructureError(e.to_string()))
+    }
+
+    async fn get_all(&self) -> DomainResult<Vec<(String, String)>> {
+        sqlx::query_as::<_, (String, String)>("SELECT key, value FROM app_settings ORDER BY key")
+            .fetch_all(&self.pool)
+            .await
+            .map_err(|e| DomainError::InfrastructureError(e.to_string()))
+    }
+}