feat: list of refunds (#284)

crates/router/src/core/refunds.rs

@@ -455,6 +455,40 @@ pub async fn validate_and_create_refund(
     Ok(refund.foreign_into())
 }
 
+// ********************************************** Refund list **********************************************
+
+///   If payment-id is provided, lists all the refunds associated with that particular payment-id
+///   If payment-id is not provided, lists the refunds associated with that particular merchant - to the limit specified,if no limits given, it is 10 by default
+
+#[instrument(skip_all)]
+pub async fn refund_list(
+    db: &dyn db::StorageInterface,
+    merchant_account: storage::merchant_account::MerchantAccount,
+    req: api_models::refunds::RefundListRequest,
+) -> RouterResponse<api_models::refunds::RefundListResponse> {
+    let limit = validator::validate_refund_list(req.limit)?;
+    let refund_list = db
+        .filter_refund_by_constraints(
+            &merchant_account.merchant_id,
+            &req,
+            merchant_account.storage_scheme,
+            limit,
+        )
+        .await
+        .change_context(errors::ApiErrorResponse::RefundNotFound)?;
+
+    let data: Vec<refunds::RefundResponse> = refund_list
+        .into_iter()
+        .map(ForeignInto::foreign_into)
+        .collect();
+    utils::when(data.is_empty(), || {
+        Err(errors::ApiErrorResponse::RefundNotFound)
+    })?;
+    Ok(services::BachResponse::Json(
+        api_models::refunds::RefundListResponse { data },
+    ))
+}
+
 // ********************************************** UTILS **********************************************
 
 // FIXME: function should not have more than 3 arguments.

crates/router/src/core/refunds/validator.rs

@@ -122,3 +122,19 @@ pub async fn validate_uniqueness_of_refund_id_against_merchant_id(
         }
     }
 }
+
+pub fn validate_refund_list(limit: Option<i64>) -> CustomResult<i64, errors::ApiErrorResponse> {
+    match limit {
+        Some(limit_val) => {
+            if !(1..=100).contains(&limit_val) {
+                Err(errors::ApiErrorResponse::InvalidRequestData {
+                    message: "limit should be in between 1 and 100".to_string(),
+                }
+                .into())
+            } else {
+                Ok(limit_val)
+            }
+        }
+        None => Ok(10),
+    }
+}

crates/router/src/db/refund.rs

@@ -55,6 +55,14 @@ pub trait RefundInterface {
         new: storage_types::RefundNew,
         storage_scheme: enums::MerchantStorageScheme,
     ) -> CustomResult<storage_types::Refund, errors::StorageError>;
+
+    async fn filter_refund_by_constraints(
+        &self,
+        merchant_id: &str,
+        refund_details: &api_models::refunds::RefundListRequest,
+        storage_scheme: enums::MerchantStorageScheme,
+        limit: i64,
+    ) -> CustomResult<Vec<storage_models::refund::Refund>, errors::StorageError>;
 }
 
 #[cfg(not(feature = "kv_store"))]
@@ -163,6 +171,25 @@ mod storage {
                 .map_err(Into::into)
                 .into_report()
         }
+
+        async fn filter_refund_by_constraints(
+            &self,
+            merchant_id: &str,
+            refund_details: &api_models::refunds::RefundListRequest,
+            _storage_scheme: enums::MerchantStorageScheme,
+            limit: i64,
+        ) -> CustomResult<Vec<storage_models::refund::Refund>, errors::StorageError> {
+            let conn = pg_connection(&self.master_pool).await;
+            <storage_models::refund::Refund as storage_types::RefundDbExt>::filter_by_constraints(
+                &conn,
+                merchant_id,
+                refund_details,
+                limit,
+            )
+            .await
+            .map_err(Into::into)
+            .into_report()
+        }
     }
 }
 
@@ -546,6 +573,26 @@ mod storage {
                 }
             }
         }
+
+        async fn filter_refund_by_constraints(
+            &self,
+            merchant_id: &str,
+            refund_details: &api_models::refunds::RefundListRequest,
+            storage_scheme: enums::MerchantStorageScheme,
+            limit: i64,
+        ) -> CustomResult<Vec<storage_models::refund::Refund>, errors::StorageError> {
+            match storage_scheme {
+                enums::MerchantStorageScheme::PostgresOnly => {
+                    let conn = pg_connection(&self.master_pool).await;
+                    <storage_models::refund::Refund as storage_types::RefundDbExt>::filter_by_constraints(&conn, merchant_id, refund_details, limit)
+                        .await
+                        .map_err(Into::into)
+                        .into_report()
+                }
+
+                enums::MerchantStorageScheme::RedisKv => Err(errors::StorageError::KVError.into()),
+            }
+        }
     }
 }
 
@@ -651,4 +698,15 @@ impl RefundInterface for MockDb {
         // [#172]: Implement function for `MockDb`
         Err(errors::StorageError::MockDbError)?
     }
+
+    async fn filter_refund_by_constraints(
+        &self,
+        _merchant_id: &str,
+        _refund_details: &api_models::refunds::RefundListRequest,
+        _storage_scheme: enums::MerchantStorageScheme,
+        _limit: i64,
+    ) -> CustomResult<Vec<storage_models::refund::Refund>, errors::StorageError> {
+        // [#172]: Implement function for `MockDb`
+        Err(errors::StorageError::MockDbError)?
+    }
 }

crates/router/src/routes/app.rs

@@ -113,12 +113,12 @@ impl Refunds {
         web::scope("/refunds")
             .app_data(web::Data::new(state))
             .service(web::resource("").route(web::post().to(refunds_create)))
+            .service(web::resource("/list").route(web::get().to(refunds_list)))
             .service(
                 web::resource("/{id}")
                     .route(web::get().to(refunds_retrieve))
                     .route(web::post().to(refunds_update)),
             )
-            .service(web::resource("/list").route(web::get().to(refunds_list)))
     }
 }
 

crates/router/src/routes/refunds.rs

@@ -68,6 +68,17 @@ pub async fn refunds_update(
 
 #[instrument(skip_all, fields(flow = ?Flow::RefundsList))]
 // #[get("/list")]
-pub async fn refunds_list() -> HttpResponse {
-    api::http_response_json("list")
+pub async fn refunds_list(
+    state: web::Data<AppState>,
+    req: HttpRequest,
+    payload: web::Query<api_models::refunds::RefundListRequest>,
+) -> HttpResponse {
+    api::server_wrap(
+        &state,
+        &req,
+        payload.into_inner(),
+        |state, merchant_account, req| refund_list(&*state.store, merchant_account, req),
+        api::MerchantAuthentication::ApiKey,
+    )
+    .await
 }

crates/router/src/types/storage/refund.rs

@@ -1,6 +1,72 @@
+use async_bb8_diesel::AsyncRunQueryDsl;
+use common_utils::errors::CustomResult;
+use diesel::{associations::HasTable, ExpressionMethods, QueryDsl};
+use error_stack::{IntoReport, ResultExt};
 pub use storage_models::refund::{
     Refund, RefundCoreWorkflow, RefundNew, RefundUpdate, RefundUpdateInternal,
 };
+use storage_models::{errors, schema::refund::dsl};
+
+use crate::{connection::PgPooledConn, logger};
 
 #[cfg(feature = "kv_store")]
 impl crate::utils::storage_partitioning::KvStorePartition for Refund {}
+
+#[async_trait::async_trait]
+pub trait RefundDbExt: Sized {
+    async fn filter_by_constraints(
+        conn: &PgPooledConn,
+        merchant_id: &str,
+        refund_list_details: &api_models::refunds::RefundListRequest,
+        limit: i64,
+    ) -> CustomResult<Vec<Self>, errors::DatabaseError>;
+}
+
+#[async_trait::async_trait]
+impl RefundDbExt for Refund {
+    async fn filter_by_constraints(
+        conn: &PgPooledConn,
+        merchant_id: &str,
+        refund_list_details: &api_models::refunds::RefundListRequest,
+        limit: i64,
+    ) -> CustomResult<Vec<Self>, errors::DatabaseError> {
+        let mut filter = <Self as HasTable>::table()
+            .filter(dsl::merchant_id.eq(merchant_id.to_owned()))
+            .order_by(dsl::id)
+            .into_boxed();
+
+        match &refund_list_details.payment_id {
+            Some(pid) => {
+                filter = filter.filter(dsl::payment_id.eq(pid.to_owned()));
+            }
+            None => {
+                filter = filter.limit(limit);
+            }
+        };
+
+        if let Some(created) = refund_list_details.created {
+            filter = filter.filter(dsl::created_at.eq(created));
+        }
+        if let Some(created_lt) = refund_list_details.created_lt {
+            filter = filter.filter(dsl::created_at.lt(created_lt));
+        }
+        if let Some(created_gt) = refund_list_details.created_gt {
+            filter = filter.filter(dsl::created_at.gt(created_gt));
+        }
+        if let Some(created_lte) = refund_list_details.created_lte {
+            filter = filter.filter(dsl::created_at.le(created_lte));
+        }
+        if let Some(created_gte) = refund_list_details.created_gte {
+            filter = filter.filter(dsl::created_at.gt(created_gte));
+        }
+
+        logger::debug!(query = %diesel::debug_query::<diesel::pg::Pg, _>(&filter).to_string());
+
+        filter
+            .get_results_async(conn)
+            .await
+            .into_report()
+            .change_context(errors::DatabaseError::NotFound)
+            .attach_printable_lazy(|| "Error filtering records by predicate")
+    }
+}