large-models-interface/src/interfaces/anthropic.js

A comprehensive, unified interface for all types of AI models - natural language, vision, audio, and video. Supports 51 providers with dynamic model discovery and multi-modal capabilities.

/**
 * @file src/interfaces/anthropic.js
 * @class Anthropic
 * @description Wrapper class for the Anthropic API.
 * @param {string} apiKey - The API key for the Anthropic API.
 */

const BaseInterface = require('./baseInterface.js');
const { anthropicApiKey } = require('../utils/loadApiKeysFromEnv.js');
const { getConfig, loadProviderConfig } = require('../utils/configManager.js');

const interfaceName = 'anthropic';

loadProviderConfig(interfaceName);
const config = getConfig();

class Anthropic extends BaseInterface {
  constructor(apiKey) {
    super(interfaceName, apiKey || anthropicApiKey, config[interfaceName].url, {
      'x-api-key': apiKey || anthropicApiKey,
      'anthropic-version': '2023-06-01',
    });
  }

  /**
   * Method to update the message object if needed.
   * Converts messages to the format expected by the Anthropic API.
   * @param {object} messageObject - The message object to be updated.
   * @returns {object} The updated message object.
   */
  updateMessageObject(messageObject) {
    let { messages } = messageObject;

    // Remove the specific 'system' message if it is the first message
    if (
      messages[0].role === 'system' &&
      messages[0].content === 'You are a helpful assistant.'
    ) {
      messages.shift();
    }

    // If the first message's role is 'system', prepend a user message
    if (messages[0] && messages[0].role === 'system') {
      messages.unshift({ role: 'user', content: 'Hello!' });
    }

    // Ensure the sequence alternates between 'user' and 'assistant', starting with 'user'
    const convertedMessages = messages.map((msg, index) => {
      if (index % 2 === 0) {
        return { ...msg, role: 'user' };
      } else {
        return { ...msg, role: 'assistant' };
      }
    });

    return {
      ...messageObject,
      messages: convertedMessages,
    };
  }
}

module.exports = Anthropic;