feat(core): add support for payment links localization

.typos.toml

@@ -62,4 +62,5 @@ extend-exclude = [
     "openapi/open_api_spec.yaml", # no longer updated
     "crates/router/src/utils/user/blocker_emails.txt", # this file contains various email domains
     "CHANGELOG.md", # This file contains all the commits
+    "crates/router/src/core/payment_link/locale.js" # this file contains converision of static strings in various languages 
 ]

api-reference/openapi_spec.json

@@ -14034,6 +14034,10 @@
           },
           "payment_id": {
             "type": "string"
+          },
+          "locale": {
+            "type": "string",
+            "nullable": true
           }
         }
       },

crates/api_models/src/payments.rs

@@ -750,6 +750,7 @@ pub struct HeaderPayload {
     pub browser_name: Option<api_enums::BrowserName>,
     pub x_client_platform: Option<api_enums::ClientPlatform>,
     pub x_merchant_domain: Option<String>,
+    pub locale: Option<String>,
 }
 
 impl HeaderPayload {
@@ -5379,6 +5380,7 @@ pub struct PaymentLinkInitiateRequest {
     #[schema(value_type = String)]
     pub merchant_id: id_type::MerchantId,
     pub payment_id: String,
+    pub locale: Option<String>,
 }
 
 #[derive(Debug, serde::Serialize)]
@@ -5406,6 +5408,7 @@ pub struct PaymentLinkDetails {
     pub merchant_description: Option<String>,
     pub sdk_layout: String,
     pub display_sdk_only: bool,
+    pub locale: Option<String>,
 }
 
 #[derive(Debug, serde::Serialize, Clone)]
@@ -5430,6 +5433,7 @@ pub struct PaymentLinkStatusDetails {
     pub redirect: bool,
     pub theme: String,
     pub return_url: String,
+    pub locale: Option<String>,
 }
 
 #[derive(Clone, Debug, serde::Deserialize, ToSchema, serde::Serialize)]

crates/router/src/core/payment_link.rs

@@ -64,6 +64,7 @@ pub async fn form_payment_link_data(
     key_store: domain::MerchantKeyStore,
     merchant_id: common_utils::id_type::MerchantId,
     payment_id: String,
+    locale: Option<String>,
 ) -> RouterResult<(PaymentLink, PaymentLinkData, PaymentLinkConfig)> {
     let db = &*state.store;
     let payment_intent = db
@@ -214,6 +215,7 @@ pub async fn form_payment_link_data(
             redirect: false,
             theme: payment_link_config.theme.clone(),
             return_url: return_url.clone(),
+            locale: locale.clone(),
         };
 
         return Ok((
@@ -240,6 +242,7 @@ pub async fn form_payment_link_data(
             merchant_description: payment_intent.description,
             sdk_layout: payment_link_config.sdk_layout.clone(),
             display_sdk_only: payment_link_config.display_sdk_only,
+            locale,
         });
 
     Ok((payment_link, payment_link_details, payment_link_config))
@@ -253,9 +256,20 @@ pub async fn initiate_secure_payment_link_flow(
     payment_id: String,
     request_headers: &header::HeaderMap,
 ) -> RouterResponse<services::PaymentLinkFormData> {
-    let (payment_link, payment_link_details, payment_link_config) =
-        form_payment_link_data(&state, merchant_account, key_store, merchant_id, payment_id)
-            .await?;
+    let locale = request_headers
+        .get(header::ACCEPT_LANGUAGE)
+        .and_then(|header_value| header_value.to_str().ok())
+        .map(|str| str.to_owned());
+
+    let (payment_link, payment_link_details, payment_link_config) = form_payment_link_data(
+        &state,
+        merchant_account,
+        key_store,
+        merchant_id,
+        payment_id,
+        locale,
+    )
+    .await?;
 
     validator::validate_secure_payment_link_render_request(
         request_headers,
@@ -341,10 +355,17 @@ pub async fn initiate_payment_link_flow(
     key_store: domain::MerchantKeyStore,
     merchant_id: common_utils::id_type::MerchantId,
     payment_id: String,
+    locale: Option<String>,
 ) -> RouterResponse<services::PaymentLinkFormData> {
-    let (_, payment_details, payment_link_config) =
-        form_payment_link_data(&state, merchant_account, key_store, merchant_id, payment_id)
-            .await?;
+    let (_, payment_details, payment_link_config) = form_payment_link_data(
+        &state,
+        merchant_account,
+        key_store,
+        merchant_id,
+        payment_id,
+        locale,
+    )
+    .await?;
 
     let css_script = get_color_scheme_css(&payment_link_config);
     let js_script = get_js_script(&payment_details)?;
@@ -617,6 +638,7 @@ pub async fn get_payment_link_status(
     key_store: domain::MerchantKeyStore,
     merchant_id: common_utils::id_type::MerchantId,
     payment_id: String,
+    locale: Option<String>,
 ) -> RouterResponse<services::PaymentLinkFormData> {
     let db = &*state.store;
     let payment_intent = db
@@ -726,6 +748,7 @@ pub async fn get_payment_link_status(
         redirect: true,
         theme: payment_link_config.theme.clone(),
         return_url,
+        locale,
     };
     let js_script = get_js_script(&PaymentLinkData::PaymentLinkStatusDetails(payment_details))?;
     let payment_link_status_data = services::PaymentLinkStatusData {