Implemented Rollback Functionality

src/config/environment.js

@@ -14,6 +14,7 @@ function loadEnvironmentConfig() {
 		accessToken: process.env.SHOPIFY_ACCESS_TOKEN,
 		targetTag: process.env.TARGET_TAG,
 		priceAdjustmentPercentage: process.env.PRICE_ADJUSTMENT_PERCENTAGE,
+		operationMode: process.env.OPERATION_MODE || "update", // Default to "update" for backward compatibility
 	};
 
 	// Validate required environment variables
@@ -85,12 +86,21 @@ function loadEnvironmentConfig() {
 		);
 	}
 
+	// Validate operation mode
+	const validOperationModes = ["update", "rollback"];
+	if (!validOperationModes.includes(config.operationMode)) {
+		throw new Error(
+			`Invalid OPERATION_MODE: "${config.operationMode}". Must be either "update" or "rollback".`
+		);
+	}
+
 	// Return validated configuration
 	return {
 		shopDomain: config.shopDomain.trim(),
 		accessToken: config.accessToken.trim(),
 		targetTag: trimmedTag,
 		priceAdjustmentPercentage: percentage,
+		operationMode: config.operationMode,
 	};
 }