Add helper method for apig name -> apig id

.gitignore

@@ -1 +1,2 @@
 /target
+*.zip

src/adapters/ingresses/apig.rs

@@ -5,7 +5,7 @@ use crate::WholePercent;
 
 use super::Ingress;
 use async_trait::async_trait;
-use aws_sdk_apigateway::types::{Op, PatchOperation};
+use aws_sdk_apigateway::types::{Op, PatchOperation, RestApi};
 use miette::miette;
 use miette::{IntoDiagnostic, Result};
 use tokio::{fs::File, io::AsyncReadExt};
@@ -117,12 +117,35 @@ impl AwsApiGateway {
         Ok(())
     }
 
+    pub async fn get_api_id_by_name(&self, api_name: &str) -> Result<RestApi> {
+        // Given an API Gateway's name, return its auto-generated AWS ID
+        let all_apis = self
+            .apig_client
+            .get_rest_apis()
+            .send()
+            .await
+            .into_diagnostic()?;
+
+        let api = all_apis
+            .items()
+            .iter()
+            .find(|api| api.name.clone().unwrap() == api_name)
+            .ok_or(miette!(
+                "Could not find an API Gateway with the name: {}",
+                api_name
+            ))?;
+
+        Ok(api.clone())
+    }
+
     pub async fn update_canary_traffic(
         &self,
-        api_id: &str,
+        api_name: &str,
         stage_name: &str,
         traffic_percentage: WholePercent,
     ) -> Result<()> {
+        let api = self.get_api_id_by_name(api_name).await?;
+
         let patch_op = PatchOperation::builder()
             .op(Op::Replace)
             .path("/canarySettings/percentTraffic")
@@ -131,7 +154,7 @@ impl AwsApiGateway {
 
         self.apig_client
             .update_stage()
-            .rest_api_id(api_id)
+            .rest_api_id(api.id.unwrap_or_default())
             .stage_name(stage_name)
             .patch_operations(patch_op)
             .send()