add: user follows, user blocks, ip bans

TODO: implement user following API endpoints
TODO: implement user blocking API endpoints
TODO: don't allow blocked users to interact with the users who blocked them

crates/core/src/database/userfollows.rs

@@ -0,0 +1,152 @@
+use super::*;
+use crate::cache::Cache;
+use crate::model::{Error, Result, auth::User, auth::UserFollow, permissions::FinePermission};
+use crate::{auto_method, execute, get, query_row};
+
+#[cfg(feature = "sqlite")]
+use rusqlite::Row;
+
+#[cfg(feature = "postgres")]
+use tokio_postgres::Row;
+
+impl DataManager {
+    /// Get a [`UserFollow`] from an SQL row.
+    pub(crate) fn get_userfollow_from_row(
+        #[cfg(feature = "sqlite")] x: &Row<'_>,
+        #[cfg(feature = "postgres")] x: &Row,
+    ) -> UserFollow {
+        UserFollow {
+            id: get!(x->0(i64)) as usize,
+            created: get!(x->1(i64)) as usize,
+            initiator: get!(x->2(i64)) as usize,
+            receiver: get!(x->3(i64)) as usize,
+        }
+    }
+
+    auto_method!(get_userfollow_by_id()@get_userfollow_from_row -> "SELECT * FROM userfollows WHERE id = $1" --name="user follow" --returns=UserFollow --cache-key-tmpl="atto.userfollow:{}");
+
+    /// Get a user follow by `initiator` and `receiver` (in that order).
+    pub async fn get_userfollow_by_initiator_receiver(
+        &self,
+        initiator: usize,
+        receiver: usize,
+    ) -> Result<UserFollow> {
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = query_row!(
+            &conn,
+            "SELECT * FROM userfollows WHERE initator = $1 AND receiver = $2",
+            &[&(initiator as i64), &(receiver as i64)],
+            |x| { Ok(Self::get_userfollow_from_row(x)) }
+        );
+
+        if res.is_err() {
+            return Err(Error::GeneralNotFound("user follow".to_string()));
+        }
+
+        Ok(res.unwrap())
+    }
+
+    /// Get a user follow by `receiver` and `initiator` (in that order).
+    pub async fn get_userfollow_by_receiver_initiator(
+        &self,
+        receiver: usize,
+        initiator: usize,
+    ) -> Result<UserFollow> {
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = query_row!(
+            &conn,
+            "SELECT * FROM userfollows WHERE receiver = $1 AND initiator = $2",
+            &[&(receiver as i64), &(initiator as i64)],
+            |x| { Ok(Self::get_userfollow_from_row(x)) }
+        );
+
+        if res.is_err() {
+            return Err(Error::GeneralNotFound("user follow".to_string()));
+        }
+
+        Ok(res.unwrap())
+    }
+
+    /// Create a new user follow in the database.
+    ///
+    /// # Arguments
+    /// * `data` - a mock [`UserFollow`] object to insert
+    pub async fn create_userfollow(&self, data: UserFollow) -> Result<()> {
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = execute!(
+            &conn,
+            "INSERT INTO userfollows VALUES ($1, $2, $3, $4)",
+            &[
+                &data.id.to_string().as_str(),
+                &data.created.to_string().as_str(),
+                &data.initiator.to_string().as_str(),
+                &data.receiver.to_string().as_str()
+            ]
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        // incr counts
+        self.incr_user_following_count(data.initiator)
+            .await
+            .unwrap();
+
+        self.incr_user_follower_count(data.receiver).await.unwrap();
+
+        // return
+        Ok(())
+    }
+
+    pub async fn delete_userfollow(&self, id: usize, user: User) -> Result<()> {
+        let follow = self.get_userfollow_by_id(id).await?;
+
+        if (user.id != follow.initiator) && (user.id != follow.receiver) {
+            if !user.permissions.check(FinePermission::MANAGE_FOLLOWS) {
+                return Err(Error::NotAllowed);
+            }
+        }
+
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = execute!(
+            &conn,
+            "DELETE FROM userfollows WHERE id = $1",
+            &[&id.to_string()]
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        self.2.remove(format!("atto.userfollow:{}", id)).await;
+
+        // decr counts
+        self.incr_user_following_count(follow.initiator)
+            .await
+            .unwrap();
+
+        self.incr_user_follower_count(follow.receiver)
+            .await
+            .unwrap();
+
+        // return
+        Ok(())
+    }
+}