refactor(api): improve API error handling and revalidation

- Update API utilities to use new ApiError class
- Improve error handling and status code management
- Enhance revalidation logic for better cache management

web/src/lib/api.ts

@@ -1,25 +1,17 @@
+import { unstable_cache } from "next/cache"
 import { METADATA_URL } from "@/constants"
-import type { IconFile, IconWithName } from "@/types/icons"
-
-/**
- * Custom error class for API errors
- */
-export class ApiError extends Error {
-	status: number
-
-	constructor(message: string, status = 500) {
-		super(message)
-		this.name = "ApiError"
-		this.status = status
-	}
-}
+import { ApiError } from "@/lib/errors"
+import type { AuthorData, IconFile, IconWithName } from "@/types/icons"
 
 /**
  * Fetches all icon data from the metadata.json file
+ * Uses fetch with revalidate for caching
  */
 export async function getAllIcons(): Promise<IconFile> {
 	try {
-		const response = await fetch(METADATA_URL)
+		const response = await fetch(METADATA_URL, {
+			next: { revalidate: 3600 },
+		})
 
 		if (!response.ok) {
 			throw new ApiError(`Failed to fetch icons: ${response.statusText}`, response.status)
@@ -93,16 +85,14 @@ export async function getIconData(iconName: string): Promise<IconWithName | null
 }
 
 /**
- * Fetches author data from GitHub API
+ * Fetch author data from GitHub API (raw function without caching)
  */
-export async function getAuthorData(authorId: number) {
+async function fetchAuthorData(authorId: number) {
 	try {
 		const response = await fetch(`https://api.github.com/user/${authorId}`, {
 			headers: {
 				Authorization: `Bearer ${process.env.GITHUB_TOKEN}`,
-				"Cache-Control": "public, max-age=86400",
 			},
-			next: { revalidate: 86400 }, // Revalidate cache once a day
 		})
 
 		if (!response.ok) {
@@ -134,6 +124,26 @@ export async function getAuthorData(authorId: number) {
 	}
 }
 
+/**
+ * Cached version of fetchAuthorData
+ * Uses unstable_cache with tags for on-demand revalidation
+ * Revalidates every 86400 seconds (24 hours)
+ * Cache key: author-{authorId}
+ * 
+ * This prevents hitting GitHub API rate limits by caching author data
+ * across multiple page builds and requests.
+ */
+export async function getAuthorData(authorId: number): Promise<AuthorData> {
+	return unstable_cache(
+		async () => await fetchAuthorData(authorId),
+		[`author-${authorId}`],
+		{
+			revalidate: 86400,
+			tags: ["authors", `author-${authorId}`],
+		}
+	)()
+}
+
 /**
  * Fetches total icon count
  */