List view!

The chain of lock().unwrap().values().map(closure).to_owned().collect()
is pretty gross, I think, but it went together pretty smoothly. Was
expecting more head bashing.

src/model.rs

@@ -45,6 +45,10 @@ impl Database {
         }
     }
 
+    pub fn list_people(&self) -> Vec<Person> {
+        self.people.lock().expect("lock people").values().map(|person| person.to_owned()).collect()
+    }
+
     pub fn add_person(&self, person: Person) {
         self.people.lock().expect("Couldn't lock people").insert(person.id.to_owned(), person);
     }

src/rest.rs

@@ -6,8 +6,13 @@ use crate::model::{
     Person,
 };
 
-#[rocket::get("/rest/<id>", format = "json")]
-fn get_rest(id: String, context: &State<Database>) -> Option<Json<Person>> {
+#[rocket::get("/people", format = "json")]
+fn people_list(context: &State<Database>) -> Json<Vec<Person>> {
+    Json(context.list_people())
+}
+
+#[rocket::get("/people/<id>", format = "json")]
+fn people_detail(id: String, context: &State<Database>) -> Option<Json<Person>> {
     match context.get_person(&id) {
         None => None,
         Some(person) => Some(Json(person))
@@ -17,6 +22,6 @@ fn get_rest(id: String, context: &State<Database>) -> Option<Json<Person>> {
 pub fn stage() -> AdHoc {
     AdHoc::on_ignite("Add REST endpoint", |rocket| async {
         rocket
-            .mount("/", rocket::routes![get_rest])
+            .mount("/", rocket::routes![people_detail, people_list])
     })
 }