algohub_server/utils/
problem.rs

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use anyhow::Result;
use serde::Deserialize;
use surrealdb::{engine::remote::ws::Client, Surreal};

use crate::{
    models::problem::Problem,
    routes::problem::{ProblemData, ProblemFilter},
};

pub async fn create(db: &Surreal<Client>, problem: ProblemData<'_>) -> Result<Option<Problem>> {
    Ok(db
        .create("problem")
        .content(Into::<Problem>::into(problem))
        .await?)
}

pub async fn update(db: &Surreal<Client>, problem: Problem) -> Result<Option<Problem>> {
    Ok(db
        .update((
            "problem",
            problem.id.clone().expect("empty id").id.to_string(),
        ))
        .content(problem)
        .await?)
}

pub async fn delete(db: &Surreal<Client>, id: &str) -> Result<Option<Problem>> {
    Ok(db.delete(("problem", id)).await?)
}

pub async fn get<M>(db: &Surreal<Client>, id: &str) -> Result<Option<M>>
where
    for<'de> M: Deserialize<'de>,
{
    Ok(db.select(("problem", id)).await?)
}

pub async fn list<M>(
    db: &Surreal<Client>,
    id: &str,
    filter: Option<ProblemFilter>,
) -> Result<Vec<M>>
where
    for<'de> M: Deserialize<'de>,
{
    let filter = filter.unwrap_or(ProblemFilter::default());
    let mut response = if let Some(limit) = filter.limit {
        db.query("SELECT * FROM problem WHERE owner = type::thing(\"account\", $id) LIMIT $limit")
            .bind(("id", id.to_string()))
            .bind(("limit", limit))
    } else {
        db.query("SELECT * FROM problem WHERE owner = type::thing(\"account\", $id)")
            .bind(("id", id.to_string()))
    }
    .await?;

    Ok(response.take(0)?)
}