Upload 3 files

package.json

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+{
+  "name": "backend",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "nodemon server.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.18.2",
+    "nodemon": "^3.0.1",
+    "yahoo-finance": "^0.3.8",
+    "yahoo-finance2": "^2.8.1"
+  }
+}

server.js

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+const express = require('express');
+const cors = require('cors');
+const yahooFinance = require('yahoo-finance2').default;
+const fetch = require('node-fetch');
+
+const app = express();
+const PORT = 3001;
+
+app.use(cors());
+app.use(express.json());
+
+app.get('/api/search/:query', async (req, res) => {
+    const query = req.params.query;
+    try {
+        const results = await yahooFinance.search(query);
+        res.json(results);
+    } catch (error) {
+        res.status(500).json({ message: 'Error searching stocks.' });
+    }
+});
+
+app.get('/api/quote/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const quote = await yahooFinance.quote(symbol);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching quote data.' });
+    }
+});
+
+app.get('/api/historical/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    const interval = req.query.interval || '1d';  // Default to 1 day
+    const range = req.query.range || '1y';       // Default to 1 year
+
+    try {
+        const url = `https://query1.finance.yahoo.com/v8/finance/chart/${symbol}?interval=${interval}&range=${range}`;
+        const response = await fetch(url);
+        const data = await response.json();
+
+        if (!data.chart.result) {
+            return res.status(404).json({ message: `No historical data found for ${symbol}` });
+        }
+
+        const timestamps = data.chart.result[0].timestamp;
+        const closePrices = data.chart.result[0].indicators.quote[0].close;
+        const openPrices = data.chart.result[0].indicators.quote[0].open;
+        const highPrices = data.chart.result[0].indicators.quote[0].high;
+        const lowPrices = data.chart.result[0].indicators.quote[0].low;
+        const adjustClosePrices = data.chart.result[0].indicators.adjclose[0].adjclose;
+        const volume = data.chart.result[0].indicators.quote[0].volume;
+
+        const historicalData = timestamps.map((time, index) => ({
+            date: new Date(time * 1000).toISOString().slice(0, 10), // Convert timestamp to date format
+            open: openPrices[index],
+            high: highPrices[index],
+            low: lowPrices[index],
+            close: closePrices[index],
+            adjustclose: adjustClosePrices[index],
+            volume: volume[index]
+        }));
+
+        res.json(historicalData.reverse());
+
+    } catch (error) {
+        console.error(`Error fetching historical data for ${symbol}:`, error);
+        res.status(500).json({ message: 'Error fetching historical data.', error: error.message });
+    }
+});
+
+app.get('/api/summary/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['summaryDetail', 'summaryProfile'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching summary data.' });
+    }
+})
+
+app.get('/api/assetProfile/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['assetProfile'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching assetProfile data.' });
+    }
+})
+
+app.get('/api/balanceSheetHistory/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['balanceSheetHistory', 'balanceSheetHistoryQuarterly'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching balanceSheet data.' });
+    }
+})
+
+app.get('/api/calendar/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['calendarEvents'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching calendarEvents data.' });
+    }
+})
+
+app.get('/api/cashflow/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['cashflowStatementHistory', 'cashflowStatementHistoryQuarterly'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching cashflowstatement data.' });
+    }
+})
+
+app.get('/api/statistic/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['defaultKeyStatistics'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching statistic data.' });
+    }
+})
+
+app.get('/api/earnings/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['earnings', 'earningsHistory', 'earningsTrend'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching earnings data.' });
+    }
+})
+
+app.get('/api/financial/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['financialData'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching financial data.' });
+    }
+})
+
+app.get('/api/fund/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['fundOwnership', 'fundPerformance', 'fundProfile'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching fund data.' });
+    }
+})
+
+app.get('/api/income/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['incomeStatementHistory', 'incomeStatementHistoryQuarterly'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching incomestatement data.' });
+    }
+})
+
+app.get('/api/trend/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['indexTrend', 'industryTrend'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching trend data.' });
+    }
+})
+
+app.get('/api/insider/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['insiderHolders', 'insiderTransactions', 'institutionOwnership'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching insider data.' });
+    }
+})
+
+app.get('/api/major/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['topHoldings', 'majorDirectHolders', 'majorHoldersBreakdown'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching majorholders data.' });
+    }
+})
+
+
+app.get('/api/netshare/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['netSharePurchaseActivity', 'price'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching netshare data.' });
+    }
+})
+
+app.get('/api/recommend/:symbol', async (req, res) => {
+    const symbol = req.params.symbol;
+    try {
+        const queryOptions = { modules: ['recommendationTrend'] };
+        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
+        res.json(quote);
+    } catch (error) {
+        res.status(500).json({ message: 'Error fetching recommendationTrend data.' });
+    }
+})
+
+app.listen(PORT, () => {
+    console.log(`Server is running on http://localhost:${PORT}`);
+});