Introduce Google Trends Integration for Langchain JS/TS

[A-Jatana]

Checked

• I searched existing ideas and did not find a similar one
• I added a very descriptive title
• I've clearly described the feature request and motivation for it

Feature request

We want to integrate Google Trends API support into the Langchain JavaScript/TypeScript version. This enhancement will introduce a tool for accessing and analyzing Google Trends data, similar to the functionality already available in the Langchain Python version.

Motivation

Google Trends data is widely used to monitor keyword trends, interest over time, and regional search behaviour. While the Python-based Langchain library already includes Google Trends functionality, there is currently no equivalent support in the JS/TS version. This inconsistency limits the flexibility of JS/TS developers who wish to leverage Google Trends data within their applications. Adding this feature would ensure parity between the Python and JavaScript libraries, making it easier for developers to access powerful trend insights regardless of their preferred programming language.

Proposal (If applicable)

We intend to develop a Google Trends tool using the official Google Trends API and contribute it as a community package to the Langchain JS/TS version. This tool will allow users to retrieve trend data, search volume over time, and related queries, bringing the JS/TS version in line with the Python version. We aim to submit a pull request for this feature by mid-November.

Sample Code

import { Tool } from 'langchain/tools'; 
import googleTrends from 'google-trends-api';

class GoogleTrendsTool extends Tool {
  constructor() {
    super();
    this.client = googleTrends;
  }

  async _call(input) {
    const { keyword, startTime, endTime } = input;
    const options = {
      keyword,
      startTime: new Date(startTime),
      endTime: new Date(endTime),
    };

    try {
      const results = await this.client.interestOverTime(options);
      return JSON.parse(results);
    } catch (error) {
      return `Error: ${error.message}`;
    }
  }

  name() {
    return 'google_trends';
  }
}

Sample Usage

const tool = new GoogleTrendsTool();
tool._call({ keyword: "LangChain", startTime: "2023-01-01", endTime: "2024-01-01" })
  .then((results) => {
    console.log(`Google Trends Results:`, results);
  });

[A-Jatana]

Hey @jacoblee93, could we turn this into an issue and start working on it?

[jacoblee93]

Hey @jacoblee93, could we turn this into an issue and start working on it?

Sure!