Ensure refunds are cleared from DB after refresh

Author: hichamboushaba

libs/fluxc-plugin/src/main/kotlin/org/wordpress/android/fluxc/persistence/WCRefundSqlUtils.kt

@@ -20,6 +20,15 @@ object WCRefundSqlUtils {
     fun insertOrUpdate(site: SiteModel, orderId: Long, data: RefundResponse) =
             insertOrUpdate(site, orderId, listOf(data))
 
+    fun deleteRefunds(site: SiteModel, orderId: Long) {
+        WellSql.delete(RefundBuilder::class.java)
+            .where()
+            .equals(WCRefundsTable.LOCAL_SITE_ID, site.id)
+            .equals(WCRefundsTable.ORDER_ID, orderId)
+            .endWhere()
+            .execute()
+    }
+
     fun insertOrUpdate(site: SiteModel, orderId: Long, data: List<RefundResponse>) {
         data.forEach { item ->
             val json = gson.toJson(item)

libs/fluxc-plugin/src/main/kotlin/org/wordpress/android/fluxc/store/WCRefundStore.kt

@@ -116,6 +116,7 @@ class WCRefundStore @Inject constructor(
             return@withDefaultContext when {
                 response.isError -> WooResult(response.error)
                 response.result != null -> {
+                    WCRefundSqlUtils.deleteRefunds(site, orderId)
                     WCRefundSqlUtils.insertOrUpdate(site, orderId, response.result.toList())
                     WooResult(response.result.map { refundsMapper.map(it) })
                 }