add: anonymous questions

crates/core/src/model/auth.rs

@@ -136,6 +136,9 @@ pub struct UserSettings {
     /// A header shown in the place of "Ask question" if `enable_questions` is true.
     #[serde(default)]
     pub motivational_header: String,
+    /// If questions from anonymous users are allowed. Requires `enable_questions`.
+    #[serde(default)]
+    pub allow_anonymous_questions: bool,
 }
 
 impl Default for User {
@@ -192,6 +195,15 @@ impl User {
         }
     }
 
+    /// Anonymous user profile.
+    pub fn anonymous() -> Self {
+        Self {
+            username: "anonymous".to_string(),
+            id: 0,
+            ..Default::default()
+        }
+    }
+
     /// Create a new token
     ///
     /// # Returns
@@ -356,6 +368,29 @@ impl UserBlock {
     }
 }
 
+#[derive(Serialize, Deserialize)]
+pub struct IpBlock {
+    pub id: usize,
+    pub created: usize,
+    pub initiator: usize,
+    pub receiver: String,
+}
+
+impl IpBlock {
+    /// Create a new [`IpBlock`].
+    pub fn new(initiator: usize, receiver: String) -> Self {
+        Self {
+            id: AlmostSnowflake::new(1234567890)
+                .to_string()
+                .parse::<usize>()
+                .unwrap(),
+            created: unix_epoch_timestamp() as usize,
+            initiator,
+            receiver,
+        }
+    }
+}
+
 #[derive(Serialize, Deserialize)]
 pub struct IpBan {
     pub ip: String,