feat(gpodder): add signup link admin methods

gpodder/src/models.rs

@@ -77,3 +77,9 @@ pub struct Page {
 pub struct UserFilter {
     pub username: Option<String>,
 }
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct SignupLink {
+    pub id: i64,
+    pub time_created: DateTime<Utc>,
+}

gpodder/src/repository/admin.rs

@@ -1,9 +1,12 @@
+use chrono::Utc;
+use rand::Rng;
+
 use crate::{AuthErr, Page, models};
 
 /// Admin view of the repository, providing methods only allowed by admins
 pub struct AdminRepository<'a> {
     pub(crate) store: &'a (dyn super::GpodderStore + Send + Sync),
-    pub(crate) user: &'a models::User,
+    pub(crate) _user: &'a models::User,
 }
 
 impl<'a> AdminRepository<'a> {
@@ -14,4 +17,21 @@ impl<'a> AdminRepository<'a> {
     ) -> Result<Vec<models::User>, AuthErr> {
         self.store.paginated_users(page, filter)
     }
+
+    /// Generate a new unique signup link ID
+    pub fn generate_signup_link(&self) -> Result<models::SignupLink, AuthErr> {
+        let link = models::SignupLink {
+            id: rand::thread_rng().r#gen(),
+            time_created: Utc::now(),
+        };
+
+        self.store.insert_signup_link(&link)?;
+
+        Ok(link)
+    }
+
+    /// Remove the signup link with the given ID, if it exists
+    pub fn remove_signup_link(&self, id: i64) -> Result<bool, AuthErr> {
+        self.store.remove_signup_link(id)
+    }
 }

gpodder/src/repository/mod.rs

@@ -47,7 +47,7 @@ impl GpodderRepository {
         if user.admin {
             Ok(admin::AdminRepository {
                 store: self.store.as_ref(),
-                user,
+                _user: user,
             })
         } else {
             Err(AuthErr::NotAnAdmin)

gpodder/src/store.rs

@@ -67,6 +67,35 @@ pub trait GpodderAuthStore {
 
     /// Return the given page of users, ordered by username
     fn paginated_users(&self, page: Page, filter: &UserFilter) -> Result<Vec<User>, AuthErr>;
+
+    /// Insert the signup link into the database.
+    ///
+    /// # Errors
+    ///
+    /// If a database failure occurs
+    fn insert_signup_link(&self, link: &SignupLink) -> Result<(), AuthErr>;
+
+    /// Get the signup link associated with the given ID
+    ///
+    /// # Returns
+    ///
+    /// Some(link) if the ID corresponds to an existing signup link; None otherwise
+    ///
+    /// # Errors
+    ///
+    /// If a database failure occurs
+    fn get_signup_link(&self, id: i64) -> Result<Option<SignupLink>, AuthErr>;
+
+    /// Remove the signup link with the given ID.
+    ///
+    /// # Returns
+    ///
+    /// True if the ID existed in the database; false otherwise
+    ///
+    /// # Errors
+    ///
+    /// If a database failure occurs
+    fn remove_signup_link(&self, id: i64) -> Result<bool, AuthErr>;
 }
 
 pub trait GpodderDeviceStore {