Add fallback for role descriptions

Author: dtolnay

Cargo.lock

@@ -107,6 +107,45 @@ impl Default for TeamHelper {
     }
 }
 
+enum TeamHelperParam {
+    /// `{{team-text team name}}`
+    Name,
+
+    /// `{{team-text team description}}`
+    Description,
+
+    /// `{{team-text team role (lookup member.roles 0)}}`
+    Role(String),
+}
+
+impl TeamHelperParam {
+    fn fluent_id(&self, team_name: &str) -> String {
+        match self {
+            TeamHelperParam::Name => format!("governance-team-{team_name}-name"),
+            TeamHelperParam::Description => format!("governance-team-{team_name}-description"),
+            TeamHelperParam::Role(role_id) => format!("governance-role-{role_id}"),
+        }
+    }
+
+    fn english<'a>(&'a self, team: &'a serde_json::Value) -> &'a str {
+        match self {
+            TeamHelperParam::Name => team["website_data"]["name"].as_str().unwrap(),
+            TeamHelperParam::Description => team["website_data"]["description"].as_str().unwrap(),
+            TeamHelperParam::Role(role_id) => {
+                for role in team["roles"].as_array().unwrap() {
+                    if role["id"] == *role_id {
+                        return role["description"].as_str().unwrap();
+                    }
+                }
+                // This should never happen. The `validate_member_roles` test in
+                // the team repo enforces that `.members.*.roles.*` lines up
+                // with exactly one `.roles.*.id`.
+                role_id
+            }
+        }
+    }
+}
+
 impl HelperDef for TeamHelper {
     fn call<'reg: 'rc, 'rc>(
         &self,
@@ -137,6 +176,25 @@ impl HelperDef for TeamHelper {
                 "{{team-text}} takes only identifier parameters",
             ));
         };
+
+        let param = match id.as_str() {
+            "name" => TeamHelperParam::Name,
+            "description" => TeamHelperParam::Description,
+            "role" => {
+                let Some(role_id) = h.param(2) else {
+                    return Err(RenderError::new(
+                        "{{team-text}} requires a third parameter for the role id",
+                    ));
+                };
+                TeamHelperParam::Role(role_id.value().as_str().unwrap().to_owned())
+            }
+            unrecognized => {
+                return Err(RenderError::new(format!(
+                    "unrecognized {{{{team-text}}}} param {unrecognized:?}",
+                )));
+            }
+        };
+
         let team = rcx
             .evaluate(context, name)
             .map_err(|e| RenderError::from_error(&format!("Cannot find team {}", name), e))?;
@@ -148,22 +206,20 @@ impl HelperDef for TeamHelper {
             .expect("Language must be string");
         let team_name = team.as_json()["name"].as_str().unwrap();
 
-        let fluent_id = format!("governance-team-{}-{}", team_name, id);
-
         // English uses the team data directly, so that it gets autoupdated
         if lang == "en-US" {
-            let english = team.as_json()["website_data"][id].as_str().unwrap();
+            let english = param.english(team.as_json());
             out.write(english)
                 .map_err(|e| RenderError::from_error("failed to render English team data", e))?;
         } else if let Some(value) = self.i18n.lookup_no_default_fallback(
             &lang.parse().expect("language must be valid"),
-            &fluent_id,
+            &param.fluent_id(team_name),
             None,
         ) {
             out.write(&value)
                 .map_err(|e| RenderError::from_error("failed to render translated team data", e))?;
         } else {
-            let english = team.as_json()["website_data"][id].as_str().unwrap();
+            let english = param.english(team.as_json());
             out.write(english)
                 .map_err(|e| RenderError::from_error("failed to render", e))?;
         }

src/i18n.rs

@@ -59,7 +59,6 @@ use sass_rs::{compile_file, Options};
 use category::Category;
 
 use caching::CachedNamedFile;
-use handlebars::handlebars_helper;
 use handlebars_fluent::{loader::Loader, FluentHelper};
 use i18n::{create_loader, LocaleInfo, SupportedLocale, TeamHelper, EXPLICIT_LOCALE_INFO};
 
@@ -492,11 +491,6 @@ async fn rocket() -> _ {
         engine
             .handlebars
             .register_helper("encode-zulip-stream", Box::new(encode_zulip_stream));
-
-        handlebars_helper!(concat: |x: String, y: String| x + &y);
-        engine
-            .handlebars
-            .register_helper("concat", Box::new(concat));
     });
 
     let rust_version = RustVersion::fetch().await.unwrap_or_default();

src/main.rs

@@ -334,6 +334,7 @@ mod tests {
                 zulip_stream: None,
                 weight: 0,
             }),
+            roles: Vec::new(),
             github: None,
             discord: vec![],
         }

src/teams.rs

@@ -62,7 +62,7 @@
                             <div>{{fluent "governance-user-team-leader"}}</div>
                         {{else}}
                             {{#if member.roles}}
-                                <div>{{fluent (concat "governance-role-" (lookup member.roles 0))}}</div>
+                                <div>{{team-text team role (lookup member.roles 0)}}</div>
                             {{/if}}
                         {{/if}}
                     </div>