add: letters api

crates/core/src/model/mail.rs

@@ -1,5 +1,6 @@
 use serde::{Serialize, Deserialize};
 use tetratto_shared::{snow::Snowflake, unix_epoch_timestamp};
+use crate::model::auth::User;
 
 /// A letter is the most basic structure of the mail system. Letters are sent
 /// and received by users.
@@ -41,4 +42,9 @@ impl Letter {
             replying_to,
         }
     }
+
+    /// Check if the given user can read the letter.
+    pub fn can_read(&self, user: &User) -> bool {
+        (user.id == self.owner) | self.receivers.contains(&user.id)
+    }
 }

crates/core/src/model/oauth.rs

@@ -76,6 +76,8 @@ pub enum AppScope {
     UserReadServices,
     /// Read the user's products.
     UserReadProducts,
+    /// Read the user's letters.
+    UserReadLetters,
     /// Create posts as the user.
     UserCreatePosts,
     /// Create messages as the user.
@@ -102,6 +104,8 @@ pub enum AppScope {
     UserCreateServices,
     /// Create products on behalf of the user.
     UserCreateProducts,
+    /// Create letters on behalf of the user.
+    UserCreateLetters,
     /// Delete posts owned by the user.
     UserDeletePosts,
     /// Delete messages owned by the user.
@@ -146,6 +150,8 @@ pub enum AppScope {
     UserManageProducts,
     /// Manage the user's channel mutes.
     UserManageChannelMutes,
+    /// Manage the user's letters.
+    UserManageLetters,
     /// Edit posts created by the user.
     UserEditPosts,
     /// Edit drafts created by the user.