add: user follow requests

add: nsfw questions
fix: inherit nsfw status from questions
fix: inherit community from questions

crates/core/src/model/auth.rs

@@ -322,6 +322,14 @@ impl UserFollow {
     }
 }
 
+#[derive(Serialize, Deserialize, PartialEq, Eq)]
+pub enum FollowResult {
+    /// Request sent to follow other user.
+    Requested,
+    /// Successfully followed other user.
+    Followed,
+}
+
 #[derive(Serialize, Deserialize)]
 pub struct UserBlock {
     pub id: usize,

crates/core/src/model/communities.rs

@@ -307,6 +307,8 @@ pub struct Question {
     pub likes: isize,
     #[serde(default)]
     pub dislikes: isize,
+    #[serde(default)]
+    pub context: QuestionContext,
 }
 
 impl Question {
@@ -326,6 +328,19 @@ impl Question {
             community: 0,
             likes: 0,
             dislikes: 0,
+            context: QuestionContext::default(),
         }
     }
 }
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct QuestionContext {
+    #[serde(default)]
+    pub is_nsfw: bool,
+}
+
+impl Default for QuestionContext {
+    fn default() -> Self {
+        Self { is_nsfw: false }
+    }
+}

crates/core/src/model/requests.rs

@@ -11,6 +11,10 @@ pub enum ActionType {
     ///
     /// `questions` table.
     Answer,
+    /// A request follow a private account.
+    ///
+    /// `users` table.
+    Follow,
 }
 
 #[derive(Serialize, Deserialize)]