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//! The links used to resolve routines.
//!
//! For server-sided links, a new link should be created for each connection.

use async_trait::async_trait;

use crate::routines::{BridgedMutation, BridgedQuery, MutationResult, QueryResult};
use crate::BridgeResult;
mod fetch_link;
mod local_link;
mod phantom_link;

pub use fetch_link::FetchLink;
pub use local_link::LocalLink;
pub use phantom_link::PhantomLink;

/// Common methods across all links.
#[async_trait(?Send)]
pub trait Link: PartialEq + Clone {
    /// Resolves a Query.
    async fn resolve_query<T>(&self, input: &T::Input) -> QueryResult<T>
    where
        T: 'static + BridgedQuery;

    /// Resolves a Mutation.
    async fn resolve_mutation<T>(&self, input: &T::Input) -> MutationResult<T>
    where
        T: 'static + BridgedMutation;

    /// Resolve a routine with encoded input.
    ///
    /// Returns `BridgeError` when a malformed input is provided.
    async fn resolve_encoded(&self, input_buf: &[u8]) -> BridgeResult<Vec<u8>>;
}