todo-baggins/src/query/subtasks.rs

use crate::query::{QueryErrors, QueryKey, QueryValue};
use crate::server::subtasks::get_subtasks_of_task;
use dioxus::prelude::ServerFnError;
use dioxus_query::prelude::{QueryResult, UseQuery, use_get_query};

pub(crate) fn use_subtasks_of_task_query(
    task_id: i32,
) -> UseQuery<QueryValue, QueryErrors, QueryKey> {
    use_get_query(
        [QueryKey::SubtasksOfTaskId(task_id)],
        fetch_subtasks_of_task,
    )
}

async fn fetch_subtasks_of_task(keys: Vec<QueryKey>) -> QueryResult<QueryValue, QueryErrors> {
    if let Some(QueryKey::SubtasksOfTaskId(task_id)) = keys.first() {
        match get_subtasks_of_task(*task_id).await {
            Ok(subtasks) => Ok(QueryValue::Subtasks(subtasks)),
            Err(ServerFnError::WrappedServerError(errors)) => Err(QueryErrors::Error(errors)),
            Err(error) => panic!("Unexpected error: {error:?}"),
        }
        .into()
    } else {
        panic!("Unexpected query keys: {keys:?}");
    }
}