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utils.js
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utils.js
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import { sep, join, resolve } from 'path';
import { nanoid } from 'nanoid';
import { readdir } from 'fs/promises';
export async function* getFiles(dir) {
const dirents = await readdir(dir, { withFileTypes: true });
for (const dirent of dirents) {
const res = resolve(dir, dirent.name);
if (dirent.isDirectory()) {
yield* getFiles(res);
} else {
const currFile = res.split('.');
if (currFile[currFile.length - 1] === 'bin') {
yield res;
}
}
}
}
export function stripAnsiCodes(str) {
return str.replace(/\u001b\[\d+m/g, '');
}
export const messagesToString = (messages, newLine = false) => {
const whitespace = newLine ? `\\\n` : ` `;
return messages
.map((m) => {
const name = !!m.name ? `(${m.name})` : '';
return `${m.role || 'assistant'}${name}:${whitespace}${m.content}`;
})
.join('\n');
};
export const dataToResponse = (
data,
promptTokens,
completionTokens,
stream = false,
reason = null
) => {
const currDate = new Date();
const contentData = {
content: unescapeWrongEscapes(data),
role: 'assistant',
};
const contentName = stream ? 'delta' : 'message';
return {
choices: [
{
[contentName]: !!data ? contentData : {},
finish_reason: reason,
index: 0,
},
],
created: currDate.getTime(),
id: nanoid(),
object: 'chat.completion.chunk',
usage: {
prompt_tokens: promptTokens,
completion_tokens: completionTokens,
total_tokens: promptTokens + completionTokens,
},
};
};
export const dataToCompletionResponse = (
data,
promptTokens,
completionTokens,
reason = null
) => {
const currDate = new Date();
return {
id: nanoid(),
object: 'text_completion',
created: currDate.getTime(),
choices: [
{
text: !!data ? unescapeWrongEscapes(data) : '',
finish_reason: reason,
index: 0,
logprobs: null,
},
],
usage: {
prompt_tokens: promptTokens,
completion_tokens: completionTokens,
total_tokens: promptTokens + completionTokens,
},
};
};
export const dataToEmbeddingResponse = (output, promptTokens) => {
return {
object: 'list',
data: [
{
object: 'embedding',
embedding: output,
index: 0,
},
],
embeddingSize: output.length,
usage: {
prompt_tokens: promptTokens,
total_tokens: promptTokens,
},
};
};
export const getModelPath = (req, res) => {
const API_KEY = req.headers.authorization;
if (!API_KEY) {
return;
}
// We're using API_KEY as a slot to provide the "llama.cpp" model path
const modelPath = API_KEY.split(' ')[1];
return normalizePath(modelPath);
};
// Normalizes and fixes all the slahses for Win/Mac
export const normalizePath = (path) =>
sep === '\\' ? path.replace(/\//g, '\\') : path.replace(/\\/g, '/');
const splitPath = (path) =>
path.split(/[\/\\]/).filter((p) => !!p && p.length > 0);
export const getModelName = (path) => {
const normalizedPath = normalizePath(path);
const pathArr = splitPath(normalizedPath);
return pathArr[pathArr.length - 1];
};
export const getInferenceEngine = (path) => {
const normalizedPath = normalizePath(path);
const pathArr = splitPath(normalizedPath);
const defaultEngine = 'llama.cpp';
const supportedEngines = ['ggml', 'llama.cpp'];
for (const engine of supportedEngines) {
if (pathArr.includes(engine)) {
return engine;
}
}
return defaultEngine;
};
// LLAMA.CPP
export const getLlamaPath = (req, res) => {
const modelPath = getModelPath(req, res);
const path = modelPath.split('llama.cpp')[0];
return join(path, 'llama.cpp');
};
// GGML
export const getGgmlModelType = (req, res) => {
const modelPath = getModelPath(req, res);
const path = modelPath.split('models')[1];
const modelArr = splitPath(path);
return modelArr[0];
// old (InferenceEngine)
// const path = modelPath.split('ggml')[1];
// console.log('PATH: ', pat/h);
// console.log('modelArr: ', modelArr);
// return modelArr[0];
};
export const getGgmlPath = (req, res) => {
const modelPath = getModelPath(req, res);
const path = modelPath.split('build')[0];
return join(path, 'build', 'bin');
};
export const compareArrays = (arr1, arr2) => {
if (arr1.length !== arr2.length) {
return false;
}
for (let i = 0; i < arr1.length; i++) {
const obj1 = arr1[i];
const obj2 = arr2[i];
// Lets trim it to give it some leeway
obj1['content'] = obj1['content'].trim();
obj2['content'] = obj2['content'].trim();
if (JSON.stringify(obj1) !== JSON.stringify(obj2)) {
console.log(`${JSON.stringify(obj1)} !== ${JSON.stringify(obj2)}`);
return false;
}
}
return true;
};
// _ don't need to be escaped
export const unescapeWrongEscapes = (input = '') => {
const output = input.replace(/\\_/g, '_').replaceAll('�', '');
if (output.length < input.length) {
console.log(
`\n> FIXED ${input.length - output.length} ESCAPED CHARACTER(S)\n`
);
}
return output;
};