72 lines
2.7 KiB
JavaScript
72 lines
2.7 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.GoogleCustomSearch = void 0;
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const env_1 = require("@langchain/core/utils/env");
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const tools_1 = require("@langchain/core/tools");
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/**
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* Class that uses the Google Search API to perform custom searches.
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* Requires environment variables `GOOGLE_API_KEY` and `GOOGLE_CSE_ID` to
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* be set.
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*/
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class GoogleCustomSearch extends tools_1.Tool {
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static lc_name() {
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return "GoogleCustomSearch";
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}
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get lc_secrets() {
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return {
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apiKey: "GOOGLE_API_KEY",
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};
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}
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constructor(fields = {
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apiKey: (0, env_1.getEnvironmentVariable)("GOOGLE_API_KEY"),
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googleCSEId: (0, env_1.getEnvironmentVariable)("GOOGLE_CSE_ID"),
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}) {
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super(...arguments);
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Object.defineProperty(this, "name", {
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enumerable: true,
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configurable: true,
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writable: true,
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value: "google-custom-search"
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});
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Object.defineProperty(this, "apiKey", {
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enumerable: true,
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configurable: true,
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writable: true,
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value: void 0
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});
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Object.defineProperty(this, "googleCSEId", {
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enumerable: true,
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configurable: true,
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writable: true,
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value: void 0
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});
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Object.defineProperty(this, "description", {
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enumerable: true,
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configurable: true,
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writable: true,
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value: "a custom search engine. useful for when you need to answer questions about current events. input should be a search query. outputs a JSON array of results."
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});
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if (!fields.apiKey) {
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throw new Error(`Google API key not set. You can set it as "GOOGLE_API_KEY" in your environment variables.`);
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}
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if (!fields.googleCSEId) {
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throw new Error(`Google custom search engine id not set. You can set it as "GOOGLE_CSE_ID" in your environment variables.`);
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}
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this.apiKey = fields.apiKey;
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this.googleCSEId = fields.googleCSEId;
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}
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async _call(input) {
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const res = await fetch(`https://www.googleapis.com/customsearch/v1?key=${this.apiKey}&cx=${this.googleCSEId}&q=${encodeURIComponent(input)}`);
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if (!res.ok) {
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throw new Error(`Got ${res.status} error from Google custom search: ${res.statusText}`);
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}
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const json = await res.json();
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const results = json?.items?.map((item) => ({
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title: item.title,
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link: item.link,
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snippet: item.snippet,
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})) ?? [];
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return JSON.stringify(results);
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}
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}
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exports.GoogleCustomSearch = GoogleCustomSearch;
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