rag-toolchain 0.1.9

is a Rust native library designed to empower developers with seamless access to common Gen AI workflows.
Documentation 
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use crate::common::{Chunk, Chunks, Embedding};
use std::error::Error;
use std::future::Future;

use super::types::PromptMessage;

/// # [`AsyncEmbeddingClient`]
/// Trait for any client that generates embeddings asynchronously
pub trait AsyncEmbeddingClient {
    type ErrorType: Error;
    fn generate_embedding(
        &self,
        text: Chunk,
    ) -> impl Future<Output = Result<Embedding, Self::ErrorType>> + Send;
    fn generate_embeddings(
        &self,
        text: Chunks,
    ) -> impl Future<Output = Result<Vec<Embedding>, Self::ErrorType>> + Send;
}

/// # [`AsyncChatClient`]
/// Trait for any client that generates chat completions asynchronously
pub trait AsyncChatClient {
    type ErrorType: Error;
    fn invoke(
        &self,
        prompt_messages: Vec<PromptMessage>,
    ) -> impl Future<Output = Result<PromptMessage, Self::ErrorType>> + Send;
}

/// # [`AsyncStreamedChatClient`]
/// Trait for any client that generates streamed chat completions asynchronously
pub trait AsyncStreamedChatClient {
    type ErrorType: Error;
    type Item: ChatCompletionStream;
    fn invoke_stream(
        &self,
        prompt_messages: Vec<PromptMessage>,
    ) -> impl Future<Output = Result<Self::Item, Self::ErrorType>> + Send;
}

/// # [`ChatCompletionStream`]
///
/// Trait for any stream that generates chat completions
pub trait ChatCompletionStream {
    type ErrorType: Error;
    type Item;
    fn next(&mut self) -> impl Future<Output = Option<Result<Self::Item, Self::ErrorType>>>;
}

#[cfg(test)]
use mockall::*;

#[cfg(test)]
mock! {
    pub AsyncChatClient {}
    impl AsyncChatClient for AsyncChatClient {
        type ErrorType = std::io::Error;
        async fn invoke(
            &self,
            prompt_messages: Vec<PromptMessage>,
        ) -> Result<PromptMessage, <Self as AsyncChatClient>::ErrorType>;
    }
}

#[cfg(test)]
mock! {
    #[derive(Copy)]
    pub AsyncStreamedChatClient {}
    impl AsyncStreamedChatClient for AsyncStreamedChatClient {
        type ErrorType = std::io::Error;
        type Item = MockChatCompletionStream;
        async fn invoke_stream(
            &self,
            prompt_messages: Vec<PromptMessage>,
        ) -> Result<MockChatCompletionStream, <Self as AsyncStreamedChatClient>::ErrorType>;
    }
}

#[cfg(test)]
mock! {
    pub ChatCompletionStream {}
    impl ChatCompletionStream for ChatCompletionStream {
        type ErrorType = std::io::Error;
        type Item = PromptMessage;
        async fn next(&mut self) -> Option<Result<PromptMessage, <Self as ChatCompletionStream>::ErrorType>>;
    }
}