use super::openai::*;
use super::openai_compatible::*;
use super::*;
use anyhow::{bail, Context, Result};
use reqwest::RequestBuilder;
use serde::Deserialize;
use serde_json::{json, Value};
const API_BASE: &str = "https://api.cohere.ai/v2";
#[derive(Debug, Clone, Deserialize, Default)]
pub struct CohereConfig {
pub name: Option<String>,
pub api_key: Option<String>,
pub api_base: Option<String>,
#[serde(default)]
pub models: Vec<ModelData>,
pub patch: Option<RequestPatch>,
pub extra: Option<ExtraConfig>,
}
impl CohereClient {
config_get_fn!(api_key, get_api_key);
config_get_fn!(api_base, get_api_base);
pub const PROMPTS: [PromptAction<'static>; 1] = [("api_key", "API Key", None)];
}
impl_client_trait!(
CohereClient,
(
prepare_chat_completions,
chat_completions,
chat_completions_streaming
),
(prepare_embeddings, embeddings),
(prepare_rerank, generic_rerank),
);
fn prepare_chat_completions(
self_: &CohereClient,
data: ChatCompletionsData,
) -> Result<RequestData> {
let api_key = self_.get_api_key()?;
let api_base = self_
.get_api_base()
.unwrap_or_else(|_| API_BASE.to_string());
let url = format!("{}/chat", api_base.trim_end_matches('/'));
let mut body = openai_build_chat_completions_body(data, &self_.model);
if let Some(obj) = body.as_object_mut() {
if let Some(top_p) = obj.remove("top_p") {
obj.insert("p".to_string(), top_p);
}
}
let mut request_data = RequestData::new(url, body);
request_data.bearer_auth(api_key);
Ok(request_data)
}
fn prepare_embeddings(self_: &CohereClient, data: &EmbeddingsData) -> Result<RequestData> {
let api_key = self_.get_api_key()?;
let api_base = self_
.get_api_base()
.unwrap_or_else(|_| API_BASE.to_string());
let url = format!("{}/embed", api_base.trim_end_matches('/'));
let input_type = match data.query {
true => "search_query",
false => "search_document",
};
let body = json!({
"model": self_.model.real_name(),
"texts": data.texts,
"input_type": input_type,
"embedding_types": ["float"],
});
let mut request_data = RequestData::new(url, body);
request_data.bearer_auth(api_key);
Ok(request_data)
}
fn prepare_rerank(self_: &CohereClient, data: &RerankData) -> Result<RequestData> {
let api_key = self_.get_api_key()?;
let api_base = self_
.get_api_base()
.unwrap_or_else(|_| API_BASE.to_string());
let url = format!("{}/rerank", api_base.trim_end_matches('/'));
let body = generic_build_rerank_body(data, &self_.model);
let mut request_data = RequestData::new(url, body);
request_data.bearer_auth(api_key);
Ok(request_data)
}
async fn chat_completions(
builder: RequestBuilder,
_model: &Model,
) -> Result<ChatCompletionsOutput> {
let res = builder.send().await?;
let status = res.status();
let data: Value = res.json().await?;
if !status.is_success() {
catch_error(&data, status.as_u16())?;
}
debug!("non-stream-data: {data}");
extract_chat_completions(&data)
}
async fn chat_completions_streaming(
builder: RequestBuilder,
handler: &mut SseHandler,
_model: &Model,
) -> Result<()> {
let mut function_name = String::new();
let mut function_arguments = String::new();
let mut function_id = String::new();
let handle = |message: SseMmessage| -> Result<bool> {
if message.data == "[DONE]" {
return Ok(true);
}
let data: Value = serde_json::from_str(&message.data)?;
debug!("stream-data: {data}");
if let Some(typ) = data["type"].as_str() {
match typ {
"content-delta" => {
if let Some(text) = data["delta"]["message"]["content"]["text"].as_str() {
handler.text(text)?;
}
}
"tool-plan-delta" => {
if let Some(text) = data["delta"]["message"]["tool_plan"].as_str() {
handler.text(text)?;
}
}
"tool-call-start" => {
if let (Some(function), Some(id)) = (
data["delta"]["message"]["tool_calls"]["function"].as_object(),
data["delta"]["message"]["tool_calls"]["id"].as_str(),
) {
if let Some(name) = function.get("name").and_then(|v| v.as_str()) {
function_name = name.to_string();
}
function_id = id.to_string();
}
}
"tool-call-delta" => {
if let Some(text) =
data["delta"]["message"]["tool_calls"]["function"]["arguments"].as_str()
{
function_arguments.push_str(text);
}
}
"tool-call-end" => {
if !function_name.is_empty() {
let arguments: Value = function_arguments.parse().with_context(|| {
format!("Tool call '{function_name}' have non-JSON arguments '{function_arguments}'")
})?;
handler.tool_call(ToolCall::new(
function_name.clone(),
arguments,
Some(function_id.clone()),
))?;
}
function_name.clear();
function_arguments.clear();
function_id.clear();
}
_ => {}
}
}
Ok(false)
};
sse_stream(builder, handle).await
}
async fn embeddings(builder: RequestBuilder, _model: &Model) -> Result<EmbeddingsOutput> {
let res = builder.send().await?;
let status = res.status();
let data: Value = res.json().await?;
if !status.is_success() {
catch_error(&data, status.as_u16())?;
}
let res_body: EmbeddingsResBody =
serde_json::from_value(data).context("Invalid embeddings data")?;
Ok(res_body.embeddings.float)
}
#[derive(Deserialize)]
struct EmbeddingsResBody {
embeddings: EmbeddingsResBodyEmbeddings,
}
#[derive(Deserialize)]
struct EmbeddingsResBodyEmbeddings {
float: Vec<Vec<f32>>,
}
fn extract_chat_completions(data: &Value) -> Result<ChatCompletionsOutput> {
let mut text = data["message"]["content"][0]["text"]
.as_str()
.unwrap_or_default()
.to_string();
let mut tool_calls = vec![];
if let Some(calls) = data["message"]["tool_calls"].as_array() {
if text.is_empty() {
if let Some(tool_plain) = data["message"]["tool_plan"].as_str() {
text = tool_plain.to_string();
}
}
for call in calls {
if let (Some(name), Some(arguments), Some(id)) = (
call["function"]["name"].as_str(),
call["function"]["arguments"].as_str(),
call["id"].as_str(),
) {
let arguments: Value = arguments.parse().with_context(|| {
format!("Tool call '{name}' have non-JSON arguments '{arguments}'")
})?;
tool_calls.push(ToolCall::new(
name.to_string(),
arguments,
Some(id.to_string()),
));
}
}
}
if text.is_empty() && tool_calls.is_empty() {
bail!("Invalid response data: {data}");
}
let output = ChatCompletionsOutput {
text,
tool_calls,
id: data["id"].as_str().map(|v| v.to_string()),
input_tokens: data["usage"]["billed_units"]["input_tokens"].as_u64(),
output_tokens: data["usage"]["billed_units"]["output_tokens"].as_u64(),
};
Ok(output)
}