Initial commit: Complete Shopify Price Updater implementation

- Full Node.js application with Shopify GraphQL API integration - Compare At price support for promotional pricing - Comprehensive error handling and retry logic - Progress tracking with markdown logging - Complete test suite with unit and integration tests - Production-ready with proper exit codes and signal handling
2025-08-05 10:05:05 -05:00
commit 1e6881ba86
29 changed files with 10663 additions and 0 deletions
--- a/src/config/environment.js
+++ b/src/config/environment.js
@@ -0,0 +1,119 @@
+const dotenv = require("dotenv");
+
+// Load environment variables from .env file
+dotenv.config();
+
+/**
+ * Validates and loads environment configuration
+ * @returns {Object} Configuration object with validated environment variables
+ * @throws {Error} If required environment variables are missing or invalid
+ */
+function loadEnvironmentConfig() {
+	const config = {
+		shopDomain: process.env.SHOPIFY_SHOP_DOMAIN,
+		accessToken: process.env.SHOPIFY_ACCESS_TOKEN,
+		targetTag: process.env.TARGET_TAG,
+		priceAdjustmentPercentage: process.env.PRICE_ADJUSTMENT_PERCENTAGE,
+	};
+
+	// Validate required environment variables
+	const requiredVars = [
+		{
+			key: "SHOPIFY_SHOP_DOMAIN",
+			value: config.shopDomain,
+			name: "Shopify shop domain",
+		},
+		{
+			key: "SHOPIFY_ACCESS_TOKEN",
+			value: config.accessToken,
+			name: "Shopify access token",
+		},
+		{ key: "TARGET_TAG", value: config.targetTag, name: "Target product tag" },
+		{
+			key: "PRICE_ADJUSTMENT_PERCENTAGE",
+			value: config.priceAdjustmentPercentage,
+			name: "Price adjustment percentage",
+		},
+	];
+
+	const missingVars = [];
+
+	for (const variable of requiredVars) {
+		if (!variable.value || variable.value.trim() === "") {
+			missingVars.push(variable.key);
+		}
+	}
+
+	if (missingVars.length > 0) {
+		const errorMessage =
+			`Missing required environment variables: ${missingVars.join(", ")}\n` +
+			"Please check your .env file and ensure all required variables are set.\n" +
+			"See .env.example for reference.";
+		throw new Error(errorMessage);
+	}
+
+	// Validate and convert price adjustment percentage
+	const percentage = parseFloat(config.priceAdjustmentPercentage);
+	if (isNaN(percentage)) {
+		throw new Error(
+			`Invalid PRICE_ADJUSTMENT_PERCENTAGE: "${config.priceAdjustmentPercentage}". Must be a valid number.`
+		);
+	}
+
+	// Validate shop domain format
+	if (
+		!config.shopDomain.includes(".myshopify.com") &&
+		!config.shopDomain.includes(".")
+	) {
+		throw new Error(
+			`Invalid SHOPIFY_SHOP_DOMAIN: "${config.shopDomain}". Must be a valid Shopify domain (e.g., your-shop.myshopify.com)`
+		);
+	}
+
+	// Validate access token format (basic check)
+	if (config.accessToken.length < 10) {
+		throw new Error(
+			"Invalid SHOPIFY_ACCESS_TOKEN: Token appears to be too short. Please verify your access token."
+		);
+	}
+
+	// Validate target tag is not empty after trimming
+	const trimmedTag = config.targetTag.trim();
+	if (trimmedTag === "") {
+		throw new Error(
+			"Invalid TARGET_TAG: Tag cannot be empty or contain only whitespace."
+		);
+	}
+
+	// Return validated configuration
+	return {
+		shopDomain: config.shopDomain.trim(),
+		accessToken: config.accessToken.trim(),
+		targetTag: trimmedTag,
+		priceAdjustmentPercentage: percentage,
+	};
+}
+
+/**
+ * Get validated environment configuration
+ * Caches the configuration after first load
+ */
+let cachedConfig = null;
+
+function getConfig() {
+	if (!cachedConfig) {
+		try {
+			cachedConfig = loadEnvironmentConfig();
+		} catch (error) {
+			console.error("Environment Configuration Error:");
+			console.error(error.message);
+			process.exit(1);
+		}
+	}
+	return cachedConfig;
+}
+
+module.exports = {
+	getConfig,
+	loadEnvironmentConfig, // Export for testing purposes
+};