Enhance upload scripts with command-line options and JavaScript implementation

- Add -u/--url option to specify API URL via command line
- Refactor usage messages into centralized show_usage() function
- Remove environment variable fallback for API_URL
- Use curl's native file handling with --data @file
- Add JavaScript version (upload.js) with identical functionality
- Both scripts support same command-line interface and options

scripts/upload.js

@@ -0,0 +1,122 @@
+#!/usr/bin/env node
+
+/**
+ * JMESPath Playground Upload Script (JavaScript)
+ * Usage: node upload.js [-u URL] "json_file.json"
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+function showUsage() {
+    const scriptName = path.basename(process.argv[1]);
+    console.log(`Usage: node ${scriptName} [-u|--url URL] <json_file>`);
+    console.log('');
+    console.log('Options:');
+    console.log('  -u, --url URL    API URL (default: http://localhost:3000)');
+    console.log('  -h, --help       Show this help message');
+    console.log('');
+    console.log('Example:');
+    console.log(`  node ${scriptName} data.json`);
+    console.log(`  node ${scriptName} -u http://example.com:3000 data.json`);
+}
+
+function parseArguments() {
+    const args = process.argv.slice(2);
+    let apiUrl = 'http://localhost:3000';
+    let jsonFile = '';
+
+    for (let i = 0; i < args.length; i++) {
+        const arg = args[i];
+
+        if (arg === '-u' || arg === '--url') {
+            if (i + 1 >= args.length) {
+                console.error('Error: URL argument required for -u/--url option');
+                process.exit(1);
+            }
+            apiUrl = args[i + 1];
+            i++; // Skip next argument
+        } else if (arg === '-h' || arg === '--help') {
+            showUsage();
+            process.exit(0);
+        } else if (arg.startsWith('-')) {
+            console.error(`Error: Unknown option ${arg}`);
+            showUsage();
+            process.exit(1);
+        } else {
+            if (jsonFile) {
+                console.error('Error: Multiple JSON files specified');
+                process.exit(1);
+            }
+            jsonFile = arg;
+        }
+    }
+
+    if (!jsonFile) {
+        console.error('Error: JSON file required');
+        showUsage();
+        process.exit(1);
+    }
+
+    return { apiUrl, jsonFile };
+}
+
+async function validateJsonFile(jsonFile) {
+    // Check if file exists
+    if (!fs.existsSync(jsonFile)) {
+        console.error(`Error: JSON file '${jsonFile}' not found`);
+        process.exit(1);
+    }
+
+    // Validate JSON content
+    try {
+        const content = fs.readFileSync(jsonFile, 'utf8');
+        JSON.parse(content);
+        return content;
+    } catch (error) {
+        console.error(`Error: '${jsonFile}' contains invalid JSON`);
+        console.error(error.message);
+        process.exit(1);
+    }
+}
+
+async function uploadData(apiUrl, jsonFile, jsonData) {
+    console.log('Uploading sample data to JMESPath Playground...');
+    console.log(`JSON file: ${jsonFile}`);
+    console.log(`API URL: ${apiUrl}`);
+    console.log('');
+
+    try {
+        const response = await fetch(`${apiUrl}/api/v1/upload`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+            },
+            body: jsonData
+        });
+
+        if (!response.ok) {
+            throw new Error(`HTTP error! status: ${response.status}`);
+        }
+
+        console.log('Sample data uploaded successfully!');
+        console.log(`Open ${apiUrl} in your browser to see the reload button.`);
+        console.log('You can then enter your JMESPath expression in the web interface.');
+
+    } catch (error) {
+        console.error('Error uploading data:', error.message);
+        process.exit(1);
+    }
+}
+
+async function main() {
+    const { apiUrl, jsonFile } = parseArguments();
+    const jsonData = await validateJsonFile(jsonFile);
+    await uploadData(apiUrl, jsonFile, jsonData);
+}
+
+// Run the script
+main().catch((error) => {
+    console.error('Unexpected error:', error);
+    process.exit(1);
+});