add: polls backend

TODO: polls frontend

crates/core/src/database/pollvotes.rs

@@ -0,0 +1,149 @@
+use super::*;
+use crate::cache::Cache;
+use crate::model::communities::PollVote;
+use crate::model::moderation::AuditLogEntry;
+use crate::model::{Error, Result, auth::User, permissions::FinePermission};
+use crate::{auto_method, execute, get, query_row, params};
+
+#[cfg(feature = "sqlite")]
+use rusqlite::Row;
+
+use tetratto_shared::unix_epoch_timestamp;
+#[cfg(feature = "postgres")]
+use tokio_postgres::Row;
+
+impl DataManager {
+    /// Get a [`PollVote`] from an SQL row.
+    pub(crate) fn get_pollvote_from_row(
+        #[cfg(feature = "sqlite")] x: &Row<'_>,
+        #[cfg(feature = "postgres")] x: &Row,
+    ) -> PollVote {
+        PollVote {
+            id: get!(x->0(i64)) as usize,
+            owner: get!(x->1(i64)) as usize,
+            created: get!(x->2(i64)) as usize,
+            poll_id: get!(x->3(i64)) as usize,
+            vote: (get!(x->4(i32)) as u8).into(),
+        }
+    }
+
+    auto_method!(get_pollvote_by_id()@get_pollvote_from_row -> "SELECT * FROM pollvotes WHERE id = $1" --name="poll vote" --returns=PollVote --cache-key-tmpl="atto.pollvote:{}");
+
+    pub async fn get_pollvote_by_owner_poll(&self, id: usize, poll_id: usize) -> Result<PollVote> {
+        if let Some(cached) = self
+            .2
+            .get(format!("atto.pollvote:{}:{}", id, poll_id))
+            .await
+        {
+            return Ok(serde_json::from_str(&cached).unwrap());
+        }
+
+        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 pollvotes WHERE id = $1 AND poll_id = $2",
+            &[&(id as i64), &(poll_id as i64)],
+            |x| { Ok(Self::get_pollvote_from_row(x)) }
+        );
+
+        if res.is_err() {
+            return Err(Error::GeneralNotFound("poll vote".to_string()));
+        }
+
+        let x = res.unwrap();
+        self.2
+            .set(
+                format!("atto.pollvote:{}:{}", id, poll_id),
+                serde_json::to_string(&x).unwrap(),
+            )
+            .await;
+
+        Ok(x)
+    }
+
+    /// Create a new poll vote in the database.
+    ///
+    /// # Arguments
+    /// * `data` - a mock [`PollVote`] object to insert
+    pub async fn create_pollvote(&self, data: PollVote) -> Result<usize> {
+        // get poll and check permission
+        let poll = self.get_poll_by_id(data.poll_id).await?;
+
+        let now = unix_epoch_timestamp() as usize;
+        let diff = now - poll.created;
+
+        if diff > poll.expires {
+            return Err(Error::MiscError("Poll is closed".to_string()));
+        };
+
+        // ...
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let vote_u8: u8 = data.vote.into();
+        let res = execute!(
+            &conn,
+            "INSERT INTO pollvotes VALUES ($1, $2, $3, $4, $5)",
+            params![
+                &(data.id as i64),
+                &(data.owner as i64),
+                &(data.created as i64),
+                &(data.poll_id as i64),
+                &(vote_u8 as i64),
+            ]
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        // update poll
+        self.incr_votes_a_count(poll.id).await?;
+        self.incr_votes_b_count(poll.id).await?;
+        self.incr_votes_c_count(poll.id).await?;
+        self.incr_votes_d_count(poll.id).await?;
+
+        // ...
+        Ok(data.id)
+    }
+
+    pub async fn delete_pollvote(&self, id: usize, user: User) -> Result<()> {
+        let y = self.get_pollvote_by_id(id).await?;
+
+        if user.id != y.owner {
+            if !user.permissions.check(FinePermission::MANAGE_POSTS) {
+                return Err(Error::NotAllowed);
+            } else {
+                self.create_audit_log_entry(AuditLogEntry::new(
+                    user.id,
+                    format!("invoked `delete_pollvote` with x value `{id}`"),
+                ))
+                .await?
+            }
+        }
+        let conn = match self.connect().await {
+            Ok(c) => c,
+            Err(e) => return Err(Error::DatabaseConnection(e.to_string())),
+        };
+
+        let res = execute!(
+            &conn,
+            "DELETE FROM pollvotes WHERE id = $1",
+            &[&(id as i64)]
+        );
+
+        if let Err(e) = res {
+            return Err(Error::DatabaseError(e.to_string()));
+        }
+
+        self.2.remove(format!("atto.pollvote:{}", id)).await;
+
+        Ok(())
+    }
+}