chore: Resolved comments

crates/api_models/src/subscription.rs

@@ -1,7 +1,9 @@
 use common_enums::connector_enums::InvoiceStatus;
 use common_types::payments::CustomerAcceptance;
 use common_utils::{
+    errors::ValidationError,
     events::ApiEventMetric,
+    fp_utils,
     id_type::{
         CustomerId, InvoiceId, MerchantConnectorAccountId, MerchantId, PaymentId, ProfileId,
         SubscriptionId,
@@ -238,6 +240,22 @@ pub struct ConfirmSubscriptionPaymentDetails {
     pub payment_token: Option<String>,
 }
 
+impl ConfirmSubscriptionPaymentDetails {
+    pub fn validate(&self) -> Result<(), error_stack::Report<ValidationError>> {
+        fp_utils::when(
+            self.payment_method_data.is_none() && self.payment_token.is_none(),
+            || {
+                Err(ValidationError::MissingRequiredField {
+                    field_name: String::from(
+                        "either of payment_method_data or payment_token must be present",
+                    ),
+                }
+                .into())
+            },
+        )
+    }
+}
+
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize, ToSchema)]
 pub struct CreateSubscriptionPaymentDetails {
     /// The url to which user must be redirected to after completion of the purchase
@@ -265,6 +283,22 @@ pub struct PaymentDetails {
     pub payment_token: Option<String>,
 }
 
+impl PaymentDetails {
+    pub fn validate(&self) -> Result<(), error_stack::Report<ValidationError>> {
+        fp_utils::when(
+            self.payment_method_data.is_none() && self.payment_token.is_none(),
+            || {
+                Err(ValidationError::MissingRequiredField {
+                    field_name: String::from(
+                        "either of payment_method_data or payment_token must be present",
+                    ),
+                }
+                .into())
+            },
+        )
+    }
+}
+
 // Creating new type for PaymentRequest API call as usage of api_models::PaymentsRequest will result in invalid payment request during serialization
 // Eg: Amount will be serialized as { amount: {Value: 100 }}
 #[derive(Debug, Clone, serde::Serialize, ToSchema)]
@@ -376,6 +410,11 @@ impl ConfirmSubscriptionRequest {
             .and_then(|data| data.billing.clone())
             .or(self.payment_details.billing.clone())
     }
+
+    // Perform validation on ConfirmSubscriptionRequest fields
+    pub fn validate(&self) -> Result<(), error_stack::Report<ValidationError>> {
+        self.payment_details.validate()
+    }
 }
 
 impl ApiEventMetric for ConfirmSubscriptionRequest {}
@@ -415,6 +454,10 @@ impl CreateAndConfirmSubscriptionRequest {
             .and_then(|data| data.billing.clone())
             .or(self.billing.clone())
     }
+
+    pub fn validate(&self) -> Result<(), error_stack::Report<ValidationError>> {
+        self.payment_details.validate()
+    }
 }
 
 impl ApiEventMetric for CreateAndConfirmSubscriptionRequest {}