refactor: restructure codebase for v1 kasm docker release

src/you_providers/garbledText.mjs

@@ -0,0 +1,50 @@
+import crypto from 'crypto';
+import sysLogger from '../utils/sysLogger.mjs';
+
+export function getRandomInt(min, max) {
+    min = Math.ceil(min);
+    max = Math.floor(max);
+    return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+// Insert garbage code
+export function insertGarbledText(content) {
+    const enableGarbledStart = process.env.ENABLE_GARBLED_START === 'true';
+    const enableGarbledEnd = process.env.ENABLE_GARBLED_END === 'true';
+
+    if (!enableGarbledStart && !enableGarbledEnd) {
+        return content;
+    }
+
+    // Generate random garbage of specified length
+    function generateGarbledText(length) {
+        return crypto.randomBytes(length).toString('hex');
+    }
+
+    let garbledContent = content;
+
+    // Configuration parameters
+    const startMinLength = parseInt(process.env.GARBLED_START_MIN_LENGTH) || 1000;
+    const startMaxLength = parseInt(process.env.GARBLED_START_MAX_LENGTH) || 5000;
+
+    const endGarbledLength = parseInt(process.env.GARBLED_END_LENGTH) || 500;
+
+    if (enableGarbledStart) {
+        const startGarbledLength = getRandomInt(startMinLength, startMaxLength);
+
+        const byteLength = Math.ceil(startGarbledLength / 2);
+
+        // Generate garbage
+        const startPlaceholder = generateGarbledText(byteLength);
+
+        garbledContent = startPlaceholder + '\n\n\n' + garbledContent.trim();
+    }
+
+    if (enableGarbledEnd) {
+        const byteLength = Math.ceil(endGarbledLength / 2);
+        const endPlaceholder = generateGarbledText(byteLength);
+        garbledContent = garbledContent.trim() + '\n\n\n' + endPlaceholder;
+    }
+
+    return garbledContent;
+}