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File size: 2,708 Bytes
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<script lang="ts">
import ChatWindow from "$lib/components/chat/ChatWindow.svelte";
import { pendingMessage } from "$lib/stores/pendingMessage";
import { onMount } from "svelte";
import type { PageData } from "./$types";
import { page } from "$app/stores";
import { HfInference } from "@huggingface/inference";
import { invalidate } from "$app/navigation";
import { base } from "$app/paths";
export let data: PageData;
$: messages = data.messages;
const hf = new HfInference();
let loading = false;
let pending = false;
async function getTextGenerationStream(inputs: string) {
let conversationId = $page.params.id;
const response = hf.endpoint($page.url.href).textGenerationStream(
{
inputs,
parameters: {
// Taken from https://huggingface.co/spaces/huggingface/open-assistant-private-testing/blob/main/app.py#L54
temperature: 0.9,
top_p: 0.95,
repetition_penalty: 1.2,
top_k: 50,
// @ts-ignore
truncate: 1024,
watermark: false,
max_new_tokens: 1024,
stop: ["<|endoftext|>"],
return_full_text: false,
},
},
{
use_cache: false,
}
);
for await (const data of response) {
pending = false;
if (!data || conversationId !== $page.params.id) break;
if (!data.token.special) {
const lastMessage = messages.at(-1);
if (lastMessage?.from !== "assistant") {
// First token has a space at the beginning, trim it
messages = [...messages, { from: "assistant", content: data.token.text.trimStart() }];
} else {
lastMessage.content += data.token.text;
messages = [...messages];
}
}
}
}
async function summarizeTitle(id: string) {
const response = await fetch(`${base}/conversation/${id}/summarize`, {
method: "POST",
});
if (response.ok) {
/// TODO(actually invalidate)
await invalidate("/");
await invalidate((url) => url.pathname === "/" || url.pathname === base);
location.reload();
}
}
async function writeMessage(message: string) {
if (!message.trim()) return;
try {
loading = true;
pending = true;
messages = [...messages, { from: "user", content: message }];
await getTextGenerationStream(message);
if (messages.filter((m) => m.from === "user").length === 1) {
summarizeTitle($page.params.id).catch(console.error);
}
// Reload conversation order - doesn't seem to work
// await invalidate('/');
} finally {
loading = false;
}
}
onMount(async () => {
if ($pendingMessage) {
const val = $pendingMessage;
$pendingMessage = "";
writeMessage(val);
}
});
</script>
<ChatWindow {loading} {pending} {messages} on:message={(message) => writeMessage(message.detail)} />
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