Refactor code structure and remove redundant changes

lib/cloudflare.ts

@@ -0,0 +1,102 @@
+/**
+ * CloudFlare Images utility
+ * 
+ * Provides helper functions to construct CloudFlare Images URLs
+ * using the configured CDN domain (cdn.thrillwiki.com)
+ */
+
+import { env } from './env';
+
+/**
+ * Available image variants for CloudFlare Images
+ */
+export type ImageVariant = 'public' | 'thumbnail' | 'banner' | 'avatar' | 'og';
+
+/**
+ * Get CloudFlare Images URL for a given image ID and variant
+ * 
+ * @param imageId - CloudFlare image ID
+ * @param variant - Image variant (default: 'public')
+ * @returns Full CloudFlare CDN URL
+ * 
+ * @example
+ * ```ts
+ * const url = getCloudFlareImageUrl('abc123', 'thumbnail');
+ * // Returns: https://cdn.thrillwiki.com/images/abc123/thumbnail
+ * ```
+ */
+export function getCloudFlareImageUrl(
+  imageId: string,
+  variant: ImageVariant = 'public'
+): string {
+  const baseUrl = env.NEXT_PUBLIC_CLOUDFLARE_IMAGE_URL;
+  
+  // cdn.thrillwiki.com format: {base_url}/images/{image-id}/{variant-id}
+  return `${baseUrl}/images/${imageId}/${variant}`;
+}
+
+/**
+ * Extract image ID from a CloudFlare Images URL
+ * 
+ * @param url - CloudFlare Images URL
+ * @returns Image ID or null if not a valid CloudFlare URL
+ * 
+ * @example
+ * ```ts
+ * const imageId = extractImageId('https://cdn.thrillwiki.com/images/abc123/public');
+ * // Returns: 'abc123'
+ * ```
+ */
+export function extractImageId(url: string): string | null {
+  try {
+    // Pattern for cdn.thrillwiki.com: /images/{id}/{variant}
+    const cdnMatch = url.match(/\/images\/([^\/]+)\/[^\/]+$/);
+    if (cdnMatch) {
+      return cdnMatch[1];
+    }
+    
+    // Pattern for imagedelivery.net: /{hash}/{id}/{variant}
+    const deliveryMatch = url.match(/imagedelivery\.net\/[^\/]+\/([^\/]+)\/[^\/]+$/);
+    if (deliveryMatch) {
+      return deliveryMatch[1];
+    }
+    
+    return null;
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Check if a URL is a CloudFlare Images URL
+ * 
+ * @param url - URL to check
+ * @returns true if URL is a CloudFlare Images URL
+ */
+export function isCloudFlareImageUrl(url: string): boolean {
+  return url.includes('cdn.thrillwiki.com/images') || 
+         url.includes('imagedelivery.net');
+}
+
+/**
+ * Get multiple variant URLs for an image
+ * 
+ * @param imageId - CloudFlare image ID
+ * @param variants - Array of variants to generate URLs for
+ * @returns Object mapping variant names to URLs
+ * 
+ * @example
+ * ```ts
+ * const urls = getImageVariants('abc123', ['public', 'thumbnail']);
+ * // Returns: { public: '...', thumbnail: '...' }
+ * ```
+ */
+export function getImageVariants(
+  imageId: string,
+  variants: ImageVariant[]
+): Record<ImageVariant, string> {
+  return variants.reduce((acc, variant) => {
+    acc[variant] = getCloudFlareImageUrl(imageId, variant);
+    return acc;
+  }, {} as Record<ImageVariant, string>);
+}