@axflow/models/dist/cohere/generation.mjs

Zero-dependency, modular SDK for building robust natural language applications

// src/cohere/generation.ts
import { POST, HttpError } from "@axflow/models/shared";

// src/cohere/shared.ts
function headers(apiKey, customHeaders) {
  const headers2 = {
    accept: "application/json",
    "content-type": "application/json",
    ...customHeaders
  };
  if (typeof apiKey === "string") {
    headers2.authorization = `Bearer ${apiKey}`;
  }
  return headers2;
}

// src/cohere/generation.ts
var COHERE_API_URL = "https://api.cohere.ai/v1/generate";
async function run(request, options) {
  const url = options.apiUrl || COHERE_API_URL;
  const response = await POST(url, {
    headers: headers(options.apiKey, options.headers),
    body: JSON.stringify({ ...request, stream: false }),
    fetch: options.fetch,
    signal: options.signal
  });
  return response.json();
}
async function streamBytes(request, options) {
  const url = options.apiUrl || COHERE_API_URL;
  const response = await POST(url, {
    headers: headers(options.apiKey, options.headers),
    body: JSON.stringify({ ...request, stream: true }),
    fetch: options.fetch,
    signal: options.signal
  });
  if (!response.body) {
    throw new HttpError("Expected response body to be a ReadableStream", response);
  }
  return response.body;
}
function noop(chunk) {
  return chunk;
}
async function stream(request, options) {
  const byteStream = await streamBytes(request, options);
  return byteStream.pipeThrough(new CohereGenerationDecoderStream(noop));
}
function chunkToToken(chunk) {
  return chunk.text || "";
}
async function streamTokens(request, options) {
  const byteStream = await streamBytes(request, options);
  return byteStream.pipeThrough(new CohereGenerationDecoderStream(chunkToToken));
}
var CohereGeneration = class {
  static run = run;
  static stream = stream;
  static streamBytes = streamBytes;
  static streamTokens = streamTokens;
};
var CohereGenerationDecoderStream = class _CohereGenerationDecoderStream extends TransformStream {
  static parse(line) {
    line = line.trim();
    if (line.length === 0) {
      return null;
    }
    try {
      return JSON.parse(line);
    } catch (error) {
      throw new Error(
        `Invalid event: expected well-formed event lines but got ${JSON.stringify(line)}`
      );
    }
  }
  static transformer(map) {
    let buffer = [];
    const decoder = new TextDecoder();
    return (bytes, controller) => {
      const chunk = decoder.decode(bytes);
      for (let i = 0, len = chunk.length; i < len; ++i) {
        const isEventSeparator = chunk[i] === "\n";
        if (!isEventSeparator) {
          buffer.push(chunk[i]);
          continue;
        }
        const event = _CohereGenerationDecoderStream.parse(buffer.join(""));
        if (event) {
          controller.enqueue(map(event));
        }
        buffer = [];
      }
    };
  }
  constructor(map) {
    super({ transform: _CohereGenerationDecoderStream.transformer(map) });
  }
};
export {
  CohereGeneration
};