Kazuma
73 lines
2.0 KiB
TypeScript
73 lines
2.0 KiB
TypeScript
import { YahooClient } from '../market/YahooClient.js';
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import type { Logger } from '../types.js';
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interface Story {
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title: string;
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publisher: string;
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link: string;
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relatedTickers: string[];
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}
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interface CatalystResult {
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tickers: string[];
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stories: Story[];
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}
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const NEWS_QUERIES = ['stock market today', 'earnings report', 'market news'];
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const MAX_STORIES = 15;
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const TICKER_REGEX = /^[A-Z]{1,6}$/;
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export class CatalystAnalyst {
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private client: YahooClient;
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private logger: Pick<Logger, 'write'>;
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constructor({ logger }: { logger?: Pick<Logger, 'write'> } = {}) {
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this.client = new YahooClient();
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this.logger = logger ?? { write: (msg: string) => process.stdout.write(msg) };
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}
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async run(): Promise<CatalystResult> {
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this.logger.write('🔍 Fetching market news...');
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const stories = await this._fetchNews();
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const tickers = this._extractTickers(stories);
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this.logger.write(` ${stories.length} stories, ${tickers.length} tickers\n`);
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return { tickers, stories };
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}
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private async _fetchNews(): Promise<Story[]> {
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const seen = new Map<string, Story>();
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for (const query of NEWS_QUERIES) {
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try {
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const { news = [] } = await (this.client as any).yf.search(query, {
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newsCount: 8,
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quotesCount: 0,
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});
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for (const s of news as any[]) {
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if (!seen.has(s.title)) {
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seen.set(s.title, {
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title: s.title,
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publisher: s.publisher,
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link: s.link,
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relatedTickers: s.relatedTickers ?? [],
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});
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}
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}
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} catch {
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/* skip failed query */
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}
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}
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return [...seen.values()].slice(0, MAX_STORIES);
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}
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private _extractTickers(stories: Story[]): string[] {
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const tickers = new Set<string>();
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for (const { relatedTickers } of stories) {
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for (const t of relatedTickers) {
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const clean = t.split(':')[0].toUpperCase();
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if (TICKER_REGEX.test(clean)) tickers.add(clean);
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}
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}
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return [...tickers];
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}
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}
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