chat-prompts 0.5.5

use super::BuildChatPrompt;
use crate::error::{PromptError, Result};
use endpoints::chat::{
    ChatCompletionAssistantMessage, ChatCompletionRequestMessage, ChatCompletionSystemMessage,
    ChatCompletionUserMessage, ChatCompletionUserMessageContent, ContentPart,
};

/// Generate prompts for the `Llama-2-chat` model.
#[derive(Debug, Default, Clone)]
pub struct Llama2ChatPrompt;
impl Llama2ChatPrompt {
    /// Create a system prompt from a chat completion request message.
    fn create_system_prompt(&self, message: &ChatCompletionSystemMessage) -> String {
        let content = message.content();
        match content.is_empty() {
            true => String::from("<<SYS>>\nYou are a helpful, respectful and honest assistant. Always answer as short as possible, while being safe. <</SYS>>"),
            false =>format!(
                "<<SYS>>\n{content} <</SYS>>"
            )
        }
    }

    /// Create a user prompt from a chat completion request message.
    fn append_user_message(
        &self,
        chat_history: impl AsRef<str>,
        system_prompt: impl AsRef<str>,
        message: &ChatCompletionUserMessage,
    ) -> String {
        let content = match message.content() {
            ChatCompletionUserMessageContent::Text(text) => text.to_string(),
            ChatCompletionUserMessageContent::Parts(parts) => {
                let mut content = String::new();
                for part in parts {
                    if let ContentPart::Text(text_content) = part {
                        content.push_str(text_content.text());
                        content.push('\n');
                    }
                }
                content
            }
        };

        match chat_history.as_ref().is_empty() {
            true => match system_prompt.as_ref().is_empty() {
                true => {
                    format!(
                        "<s>[INST] {user_message} [/INST]",
                        user_message = content.trim(),
                    )
                }
                false => {
                    format!(
                        "<s>[INST] {system_prompt}\n\n{user_message} [/INST]",
                        system_prompt = system_prompt.as_ref().trim(),
                        user_message = content.trim(),
                    )
                }
            },
            false => format!(
                "{chat_history}<s>[INST] {user_message} [/INST]",
                chat_history = chat_history.as_ref().trim(),
                user_message = content.trim(),
            ),
        }
    }

    /// create an assistant prompt from a chat completion request message.
    fn append_assistant_message(
        &self,
        chat_history: impl AsRef<str>,
        message: &ChatCompletionAssistantMessage,
    ) -> Result<String> {
        let content = match message.content() {
            Some(content) => content.to_string(),
            // Note that the content is optional if `tool_calls` is specified.
            None => match message.tool_calls().is_some() {
                true => String::new(),
                false => return Err(PromptError::NoAssistantMessage),
            },
        };

        Ok(format!(
            "{prompt} {assistant_message} </s>",
            prompt = chat_history.as_ref().trim(),
            assistant_message = content.trim(),
        ))
    }
}
impl BuildChatPrompt for Llama2ChatPrompt {
    fn build(&self, messages: &mut Vec<ChatCompletionRequestMessage>) -> Result<String> {
        if messages.is_empty() {
            return Err(crate::error::PromptError::NoMessages);
        }

        // system prompt
        let system_prompt = match messages[0] {
            ChatCompletionRequestMessage::System(ref message) => {
                self.create_system_prompt(message)
            }
            _ => String::from("<<SYS>>\nYou are a helpful, respectful and honest assistant. Always answer as short as possible, while being safe. <</SYS>>"),
        };

        // append user/assistant messages
        let mut prompt = String::new();
        for message in messages {
            match message {
                ChatCompletionRequestMessage::User(message) => {
                    prompt = self.append_user_message(&prompt, &system_prompt, message);
                }
                ChatCompletionRequestMessage::Assistant(message) => {
                    prompt = self.append_assistant_message(&prompt, message)?;
                }
                ChatCompletionRequestMessage::System(_) => continue,
            }
        }

        Ok(prompt)
    }
}

/// Generate prompts for the `Codellama-instruct` model.
#[derive(Debug, Default, Clone)]
pub struct CodeLlamaInstructPrompt;
impl CodeLlamaInstructPrompt {
    /// Create a system prompt from a chat completion request message.
    fn create_system_prompt(&self, message: &ChatCompletionSystemMessage) -> String {
        let content = message.content();
        match content.is_empty() {
            true => String::from("<<SYS>>\nWrite code to solve the following coding problem that obeys the constraints and passes the example test cases. Please wrap your code answer using ```: <</SYS>>"),
            false => format!(
                "<<SYS>>\n{system_prompt} <</SYS>>", system_prompt=content
            )
        }
    }

    /// Create a user prompt from a chat completion request message.
    fn append_user_message(
        &self,
        chat_history: impl AsRef<str>,
        system_prompt: impl AsRef<str>,
        message: &ChatCompletionUserMessage,
    ) -> String {
        let content = match message.content() {
            ChatCompletionUserMessageContent::Text(text) => text.to_string(),
            ChatCompletionUserMessageContent::Parts(parts) => {
                let mut content = String::new();
                for part in parts {
                    if let ContentPart::Text(text_content) = part {
                        content.push_str(text_content.text());
                        content.push('\n');
                    }
                }
                content
            }
        };

        match chat_history.as_ref().is_empty() {
            true => format!(
                "<s>[INST] {system_prompt}\n\n{user_message} [/INST]",
                system_prompt = system_prompt.as_ref().trim(),
                user_message = content.trim(),
            ),
            false => format!(
                "{chat_history}<s>[INST] {user_message} [/INST]",
                chat_history = chat_history.as_ref().trim(),
                user_message = content.trim(),
            ),
        }
    }

    /// create an assistant prompt from a chat completion request message.
    fn append_assistant_message(
        &self,
        chat_history: impl AsRef<str>,
        message: &ChatCompletionAssistantMessage,
    ) -> Result<String> {
        let content = match message.content() {
            Some(content) => content.to_string(),
            // Note that the content is optional if `tool_calls` is specified.
            None => match message.tool_calls().is_some() {
                true => String::new(),
                false => return Err(PromptError::NoAssistantMessage),
            },
        };

        Ok(format!(
            "{prompt} {assistant_message} </s>",
            prompt = chat_history.as_ref().trim(),
            assistant_message = content.trim(),
        ))
    }
}
impl BuildChatPrompt for CodeLlamaInstructPrompt {
    fn build(&self, messages: &mut Vec<ChatCompletionRequestMessage>) -> Result<String> {
        if messages.is_empty() {
            return Err(crate::error::PromptError::NoMessages);
        }

        // system prompt
        let system_prompt = match messages[0] {
            ChatCompletionRequestMessage::System(ref message) => {
                self.create_system_prompt(message)
            }
            _ => String::from("<<SYS>>\nWrite code to solve the following coding problem that obeys the constraints and passes the example test cases. Please wrap your code answer using ```: <</SYS>>"),
        };

        // append user/assistant messages
        let mut prompt = String::new();
        for message in messages {
            match message {
                ChatCompletionRequestMessage::User(message) => {
                    prompt = self.append_user_message(&prompt, &system_prompt, message);
                }
                ChatCompletionRequestMessage::Assistant(message) => {
                    prompt = self.append_assistant_message(&prompt, message)?;
                }
                ChatCompletionRequestMessage::System(_) => continue,
            }
        }

        Ok(prompt)
    }
}

/// Generate prompts for the `Codellama-70b-instruct-hf` model.
#[derive(Debug, Default, Clone)]
pub struct CodeLlamaSuperInstructPrompt;
impl CodeLlamaSuperInstructPrompt {
    /// Create a system prompt from a chat completion request message.
    fn create_system_prompt(&self, message: &ChatCompletionSystemMessage) -> String {
        let content = message.content();
        match content.is_empty() {
            true => String::from("<s>Source: system\n\n Write code to solve the following coding problem that obeys the constraints and passes the example test cases. Please wrap your code answer using ```: <step>"),
            false => format!(
                "<s>Source: system\n\n {content} <step>"
            )
        }
    }

    /// Create a user prompt from a chat completion request message.
    fn append_user_message(
        &self,
        chat_history: impl AsRef<str>,
        system_prompt: impl AsRef<str>,
        message: &ChatCompletionUserMessage,
    ) -> String {
        let content = match message.content() {
            ChatCompletionUserMessageContent::Text(text) => text.to_string(),
            ChatCompletionUserMessageContent::Parts(parts) => {
                let mut content = String::new();
                for part in parts {
                    if let ContentPart::Text(text_content) = part {
                        content.push_str(text_content.text());
                        content.push('\n');
                    }
                }
                content
            }
        };

        match chat_history.as_ref().is_empty() {
            true => format!(
                "{system_prompt} Source: user\n\n {user_message} <step>",
                system_prompt = system_prompt.as_ref().trim(),
                user_message = content.trim(),
            ),
            false => format!(
                "{chat_history} Source: user\n\n {user_message} <step>",
                chat_history = chat_history.as_ref().trim(),
                user_message = content.trim(),
            ),
        }
    }

    /// create an assistant prompt from a chat completion request message.
    fn append_assistant_message(
        &self,
        chat_history: impl AsRef<str>,
        message: &ChatCompletionAssistantMessage,
    ) -> Result<String> {
        let content = match message.content() {
            Some(content) => content.to_string(),
            // Note that the content is optional if `tool_calls` is specified.
            None => match message.tool_calls().is_some() {
                true => String::new(),
                false => return Err(PromptError::NoAssistantMessage),
            },
        };

        Ok(format!(
            "{prompt} Source: assistant\n\n {assistant_message} <step>",
            prompt = chat_history.as_ref().trim(),
            assistant_message = content.trim(),
        ))
    }
}
impl BuildChatPrompt for CodeLlamaSuperInstructPrompt {
    fn build(&self, messages: &mut Vec<ChatCompletionRequestMessage>) -> Result<String> {
        if messages.is_empty() {
            return Err(crate::error::PromptError::NoMessages);
        }

        // system prompt
        let system_prompt = match messages[0] {
            ChatCompletionRequestMessage::System(ref message) => {
                self.create_system_prompt(message)
            }
            _ => String::from("<s>Source: system\n\n Write code to solve the following coding problem that obeys the constraints and passes the example test cases. Please wrap your code answer using ```: <step>")
        };

        // append user/assistant messages
        let mut prompt = String::new();
        for message in messages {
            match message {
                ChatCompletionRequestMessage::User(message) => {
                    prompt = self.append_user_message(&prompt, &system_prompt, message);
                }
                ChatCompletionRequestMessage::Assistant(message) => {
                    prompt = self.append_assistant_message(&prompt, message)?;
                }
                ChatCompletionRequestMessage::System(_) => continue,
            }
        }

        prompt.push_str(" Source: assistant\nDestination: user\n\n ");

        Ok(prompt)
    }
}