Initial CLI support

ebay_command_line_tool.js

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+// ebay_command_line_tool.js
+// A Node.js script to scrape eBay search results and output JSON.
+// Uses ebay_core.js for parsing and extraction logic.
+// Usage: node ebay_command_line_tool.js "EBAY_SEARCH_URL"
+
+const puppeteer = require('puppeteer');
+const fs = require('fs');
+const path = require('path');
+
+// --- Main Scraping Function ---
+async function scrapeEbayFromCommandLine(url) {
+    if (!url) {
+        console.error("Error: eBay search URL is required as the first argument.");
+        console.log("Example Usage: node ebay_command_line_tool.js \"https://www.ebay.com/sch/i.html?_nkw=ssd\"");
+        process.exit(1);
+    }
+
+    // --- Load Core Script ---
+    // This assumes ebay_core.js is in the same directory as this script.
+    const coreScriptPath = path.join(__dirname, 'ebay_core.js');
+    let ebayCoreScriptContent;
+    try {
+        ebayCoreScriptContent = fs.readFileSync(coreScriptPath, 'utf8');
+        if (!ebayCoreScriptContent) {
+            throw new Error("ebay_core.js is empty or could not be read properly.");
+        }
+    } catch (e) {
+        console.error(`Error: Could not read ebay_core.js from ${coreScriptPath}`);
+        console.error("Please ensure 'ebay_core.js' exists in the same directory as this script.");
+        console.error(e.message);
+        process.exit(1);
+    }
+
+    console.log(`Attempting to scrape: ${url}`);
+    let browser; // Declare browser outside try so it can be closed in finally
+    try {
+        browser = await puppeteer.launch({
+            headless: true, // Set to false for debugging to see the browser
+            args: ['--no-sandbox', '--disable-setuid-sandbox'] // Common args for server environments
+        });
+        const page = await browser.newPage();
+        await page.setUserAgent('Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36');
+        // Increase navigation timeout and wait until network is idle
+        await page.goto(url, { waitUntil: 'networkidle2', timeout: 90000 });
+
+        // --- Inject and Execute Core Logic ---
+        // Inject the core parser script into the page context
+        // This makes the EbayParser object available in the page's window scope
+        await page.evaluate(ebayCoreScriptContent);
+
+        // Now call the extraction function from the injected script
+        const extractedResults = await page.evaluate(() => {
+            // EbayParser should now be available on the window object
+            if (typeof window.EbayParser === 'undefined' || typeof window.EbayParser.extractDataFromPage !== 'function') {
+                // This error will be caught by the outer try/catch if thrown
+                throw new Error("EbayParser or EbayParser.extractDataFromPage function was not properly injected or is missing in ebay_core.js!");
+            }
+            return window.EbayParser.extractDataFromPage(); // This calls the function defined in ebay_core.js
+        });
+        
+        return extractedResults;
+
+    } catch (e) {
+        console.error("An error occurred during the scraping process:", e.message);
+        // If running in a visible mode, a screenshot can be helpful.
+        // if (browser && page) { // Check if page exists
+        //     try {
+        //        await page.screenshot({ path: 'ebay_scraping_error.png' });
+        //        console.log("A screenshot 'ebay_scraping_error.png' has been saved for debugging.");
+        //     } catch(se) { console.error("Could not save screenshot:", se.message); }
+        // }
+        return []; // Return empty array on error
+    } finally {
+        if (browser) {
+            await browser.close();
+        }
+    }
+}
+
+// --- Script Execution ---
+// The first actual argument to the script (process.argv[0] is node, process.argv[1] is the script path)
+const searchUrl = process.argv[2];
+
+(async () => {
+    const data = await scrapeEbayFromCommandLine(searchUrl);
+    if (data && data.length > 0) {
+        console.log(JSON.stringify(data, null, 2));
+    } else {
+        console.log("No data extracted. This could be due to an error, an empty page, or incorrect selectors in ebay_core.js.");
+    }
+})();