Sai Kiran Vella
109 lines
3.6 KiB
TypeScript
109 lines
3.6 KiB
TypeScript
import { YahooFinanceClient } from '../clients/YahooFinanceClient';
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import type { Logger, CatalystResult, Story, YahooNewsItem } from '../types';
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export class CatalystAnalyst {
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private static readonly NEWS_QUERIES = [
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'stock market today',
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'earnings report today',
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'market news catalyst',
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'federal reserve interest rates',
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'stock upgrade downgrade analyst',
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];
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private static readonly MAX_STORIES = 20;
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private static readonly TICKER_REGEX = /^[A-Z]{1,6}$/;
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private client: YahooFinanceClient;
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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 YahooFinanceClient();
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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 rawStories = await this._fetchNews();
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if (!rawStories.length) {
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this.logger.write(' ⚠ all news queries failed — check network or Yahoo rate limit\n');
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return { tickers: [], tickerFrequency: {}, stories: [] };
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}
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const stories = rawStories.map((s) => ({
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title: s.title,
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link: s.link ?? '',
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source: s.publisher ?? 'unknown',
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tickers: (s.relatedTickers ?? [])
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.map((t) => t.split(':')[0].toUpperCase())
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.filter((t) => CatalystAnalyst.TICKER_REGEX.test(t)),
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}));
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const { tickers, tickerFrequency } = CatalystAnalyst.rankTickers(stories);
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this.logger.write(` ${stories.length} stories, ${tickers.length} tickers\n`);
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return { tickers, tickerFrequency, stories };
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}
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// Search by specific ticker for the /api/analyze endpoint.
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async fetchStoriesForTickers(tickers: string[]): Promise<Story[]> {
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const seen = new Map<string, YahooNewsItem>();
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await Promise.all(
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tickers.slice(0, 10).map(async (ticker) => {
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try {
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const news = await this.client.search(ticker, { newsCount: 3, quotesCount: 0 });
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for (const item of news) {
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if (!seen.has(item.title)) seen.set(item.title, item);
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}
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} catch {
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/* skip tickers Yahoo can't resolve */
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}
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}),
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);
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return [...seen.values()].slice(0, 15).map((s) => ({
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title: s.title,
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link: s.link ?? '',
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source: s.publisher ?? 'unknown',
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tickers: (s.relatedTickers ?? [])
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.map((t) => t.split(':')[0].toUpperCase())
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.filter((t) => CatalystAnalyst.TICKER_REGEX.test(t)),
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}));
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}
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private async _fetchNews(): Promise<YahooNewsItem[]> {
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const seen = new Map<string, YahooNewsItem>();
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let successCount = 0;
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for (const query of CatalystAnalyst.NEWS_QUERIES) {
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try {
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const news = await this.client.search(query, { newsCount: 8, quotesCount: 0 });
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successCount++;
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for (const s of news) {
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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 — tracked via successCount */
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}
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}
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if (successCount === 0) return [];
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return [...seen.values()].slice(0, CatalystAnalyst.MAX_STORIES);
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}
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static rankTickers(stories: Story[]): {
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tickers: string[];
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tickerFrequency: Record<string, number>;
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} {
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const freq: Record<string, number> = {};
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for (const { tickers } of stories) {
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for (const t of tickers) {
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freq[t] = (freq[t] ?? 0) + 1;
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}
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}
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const tickers = Object.keys(freq).sort((a, b) => freq[b] - freq[a]);
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return { tickers, tickerFrequency: freq };
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}
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}
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