fix(utils): add to_state_code to router crate (#7293)

crates/router/src/connector/utils.rs

@@ -1822,6 +1822,8 @@ pub trait AddressDetailsData {
     fn get_zip(&self) -> Result<&Secret<String>, Error>;
     fn get_country(&self) -> Result<&api_models::enums::CountryAlpha2, Error>;
     fn get_combined_address_line(&self) -> Result<Secret<String>, Error>;
+    fn to_state_code(&self) -> Result<Secret<String>, Error>;
+    fn to_state_code_as_optional(&self) -> Result<Option<Secret<String>>, Error>;
     fn get_optional_line2(&self) -> Option<Secret<String>>;
     fn get_optional_country(&self) -> Option<api_models::enums::CountryAlpha2>;
 }
@@ -1894,6 +1896,31 @@ impl AddressDetailsData for hyperswitch_domain_models::address::AddressDetails {
             self.get_line2()?.peek()
         )))
     }
+    fn to_state_code(&self) -> Result<Secret<String>, Error> {
+        let country = self.get_country()?;
+        let state = self.get_state()?;
+        match country {
+            api_models::enums::CountryAlpha2::US => Ok(Secret::new(
+                UsStatesAbbreviation::foreign_try_from(state.peek().to_string())?.to_string(),
+            )),
+            api_models::enums::CountryAlpha2::CA => Ok(Secret::new(
+                CanadaStatesAbbreviation::foreign_try_from(state.peek().to_string())?.to_string(),
+            )),
+            _ => Ok(state.clone()),
+        }
+    }
+    fn to_state_code_as_optional(&self) -> Result<Option<Secret<String>>, Error> {
+        self.state
+            .as_ref()
+            .map(|state| {
+                if state.peek().len() == 2 {
+                    Ok(state.to_owned())
+                } else {
+                    self.to_state_code()
+                }
+            })
+            .transpose()
+    }
 
     fn get_optional_line2(&self) -> Option<Secret<String>> {
         self.line2.clone()