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import {
jsonize_stream_data,
stringify_stream_bytes,
} from "./stream_jsonizer.js";
import {
update_message,
create_messager,
get_request_messages,
get_selected_llm_model,
get_selected_temperature,
} from "../components/chat_operator.js";
export class ChatCompletionsRequester {
constructor({
prompt,
model = null,
temperature = 0.5,
top_p = 0.95,
openai_endpoint = null,
} = {}) {
this.prompt = prompt;
this.openai_endpoint =
openai_endpoint || this.extract_endpoint_and_model()[0];
this.model = model || this.extract_endpoint_and_model()[1];
this.temperature = temperature;
this.top_p = top_p;
this.backend_request_endpoint = "/chat/completions";
this.controller = new AbortController();
}
extract_endpoint_and_model() {
let model_id_with_endpoint = get_selected_llm_model();
this.openai_endpoint = model_id_with_endpoint.split("|")[0];
this.model = model_id_with_endpoint.split("|")[1];
return [this.openai_endpoint, this.model];
}
construct_openai_request_headers() {
this.backend_request_headers = {
"Content-Type": "application/json",
};
this.openai_request_headers = {
"Content-Type": "application/json",
Authorization: `Bearer ${localStorage.getItem("openai_api_key")}`,
};
}
construct_backend_request_body() {
this.openai_request_messages = get_request_messages();
this.backend_request_body = {
openai_endpoint: this.openai_endpoint,
openai_request_method: "POST",
openai_request_headers: this.openai_request_headers,
openai_request_body: {
model: this.model,
messages: this.openai_request_messages,
temperature: this.temperature,
top_p: this.top_p,
stream: true,
},
};
}
construct_request_params() {
this.construct_openai_request_headers();
this.construct_backend_request_body();
this.backend_request_params = {
method: "POST",
headers: this.backend_request_headers,
body: JSON.stringify(this.backend_request_body),
signal: this.controller.signal,
stream: true,
};
}
create_messager_components() {
create_messager("user", this.prompt);
create_messager("assistant", "", this.model, this.temperature);
}
async post() {
this.construct_request_params();
const response = await fetch(
this.backend_request_endpoint,
this.backend_request_params
);
const reader = response.body.getReader();
let buffer = "";
return reader.read().then(function process({ done, value }) {
if (done) {
return;
}
buffer += stringify_stream_bytes(value);
let boundary = buffer.lastIndexOf("\n");
if (boundary !== -1) {
let input = buffer.substring(0, boundary);
buffer = buffer.substring(boundary + 1);
let json_chunks = jsonize_stream_data(input);
update_message(json_chunks);
}
return reader.read().then(process);
});
}
stop() {
this.controller.abort();
}
}
// export var available_models = { "user-customized": ["notes"] };
export class AvailableModelsRequester {
constructor(openai_endpoint) {
this.openai_endpoint = openai_endpoint;
this.backend_request_endpoint = "/models";
this.controller = new AbortController();
this.available_models = [];
}
construct_openai_request_headers() {
this.backend_request_headers = {
"Content-Type": "application/json",
};
this.openai_request_headers = {
"Content-Type": "application/json",
};
}
construct_backend_request_body() {
this.backend_request_body = {
openai_endpoint: this.openai_endpoint,
openai_request_method: "GET",
openai_request_headers: this.openai_request_headers,
};
}
construct_request_params() {
this.construct_openai_request_headers();
this.construct_backend_request_body();
this.backend_request_params = {
method: "POST",
headers: this.backend_request_headers,
body: JSON.stringify(this.backend_request_body),
signal: this.controller.signal,
};
}
get() {
this.construct_request_params();
return fetch(this.backend_request_endpoint, this.backend_request_params)
.then((response) => response.json())
.then((response_json) => {
let data = response_json.data;
data.forEach((item) => {
if (!this.available_models.includes(item.id)) {
this.available_models.push(item.id);
}
});
console.log(
`get available_models of ${this.openai_endpoint}:`,
this.available_models
);
return this.available_models;
})
.catch((error) => {
console.error("Error:", error);
});
}
stop() {
this.controller.abort();
}
}
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