exchange broker options

web/src/pages/add_table/loader.rs

@@ -40,6 +40,19 @@ pub(crate) async fn load_page(
         return Err(LoadError::Forbidden);
     }
 
+    let mut exchange_rates = state.exchange_rates.clone();
+    let rate_sources = exchange_rates
+        .list_rate_sources(
+            authenticated_request(headers, Empty {}).map_err(|_| LoadError::Unauthenticated)?,
+        )
+        .await
+        .map_err(|error| LoadError::Backend(error.message().to_string()))?
+        .into_inner()
+        .sources
+        .into_iter()
+        .map(|source| source.id)
+        .collect();
+
     let mut definitions = state.definitions;
     // What a column may be is the backend's to say; the picker and every rule
     // the draft applies are read from this.
@@ -135,6 +148,7 @@ pub(crate) async fn load_page(
             .into_iter()
             .map(|profile| profile.name)
             .collect(),
+        rate_sources,
         draft,
         status,
         error,

web/src/pages/add_table/logic.rs

@@ -249,6 +249,7 @@ mod tests {
             nav: crate::ui::Nav::default(),
             shared_profile: "__global".to_string(),
             profiles: vec!["billing".to_string()],
+            rate_sources: vec!["ecb".to_string()],
             draft,
             status: None,
             error: None,

web/src/pages/add_table/state.rs

@@ -198,6 +198,8 @@ impl BuilderForm {
 pub(crate) struct AddTablePageState {
     pub nav: crate::ui::Nav,
     pub profiles: Vec<String>,
+    /// Provider IDs returned by ExchangeRateService.ListRateSources.
+    pub rate_sources: Vec<String>,
     /// The profile a global table lands in, as the profile tree reports it.
     /// The builder posts it as the created table's scope.
     pub shared_profile: String,
@@ -511,6 +513,7 @@ mod tests {
             nav: crate::ui::Nav::default(),
             shared_profile: "__global".to_string(),
             profiles: Vec::new(),
+            rate_sources: vec!["ecb".to_string()],
             draft: posted_form().to_draft(),
             status: None,
             error: None,
@@ -597,6 +600,7 @@ mod tests {
             nav: crate::ui::Nav::default(),
             shared_profile: "__global".to_string(),
             profiles: Vec::new(),
+            rate_sources: vec!["ecb".to_string()],
             draft,
             status: None,
             error: None,

web/src/pages/add_table/ui.rs

@@ -111,6 +111,7 @@ mod tests {
             nav: Nav::default(),
             shared_profile: "__global".to_string(),
             profiles: vec!["billing".to_string()],
+            rate_sources: vec!["ecb".to_string()],
             draft,
             status: None,
             error: None,
@@ -221,13 +222,15 @@ mod tests {
     }
 
     #[test]
-    fn the_page_offers_the_new_profile_option_and_the_currency_list() {
+    fn the_page_offers_backend_vocabularies_for_profile_setup() {
         let html = render_page(&page());
 
         assert!(!html.contains("Template error"), "{html}");
         assert!(html.contains(r#"value="__new__""#));
         assert!(html.contains(r#"<datalist id="currency-codes">"#));
         assert!(html.contains(r#"<option value="EUR">"#));
+        assert!(html.contains(r#"<datalist id="rate-source-ids">"#));
+        assert!(html.contains(r#"<option value="ecb">"#));
     }
 
     #[test]
@@ -373,7 +376,16 @@ mod tests {
         state.draft.creating_new_profile = true;
         let html = render_builder(&state);
         assert!(html.contains(r#"name="profile_name_input""#));
-        assert!(html.contains(r#"name="accounting_currency" value="EUR" list="currency-codes""#));
+        assert!(html.contains(r#"name="accounting_currency""#));
+        assert!(html.contains(r#"list="currency-codes""#));
+        assert!(html.contains(r#"name="rate_source_id""#));
+        assert!(html.contains(r#"list="rate-source-ids""#));
+        let foreign_currency_input = html
+            .split(r#"name="foreign_currencies""#)
+            .nth(1)
+            .and_then(|rest| rest.split('>').next())
+            .expect("the initial foreign-currency input should be rendered");
+        assert!(foreign_currency_input.contains(r#"list="currency-codes""#));
     }
 
     /// The dialog only exists when there is a failure, and it carries the same