fix: use all historical page paths for contributions

Author: wackerow

src/lib/utils/contributors.ts

@@ -45,21 +45,42 @@ export const getFileContributorInfo = async (
   return { contributors, lastUpdatedDate }
 }
 
+/**
+ * Returns an array of possible historical file paths for a given page,
+ * accounting for different directory structures and migrations over time.
+ *
+ * @param pagePath - The relative path of the page (without extension).
+ * @returns An array of strings representing all historical file paths for the page.
+ *
+ * @remarks
+ * This function is used to track all possible locations a page may have existed in the repository,
+ * which is useful for aggregating git history and contributor information.
+ *
+ * @note
+ * If a page is migrated or its location changes, ensure the new path is added to this list.
+ * This maintains a complete historical record for accurate git history tracking.
+ */
+const getAllHistoricalPaths = (pagePath: string): string[] => [
+  join("src/pages", `${pagePath}.tsx`),
+  join("src/pages", pagePath, "index.tsx"),
+  join("src/pages/[locale]", `${pagePath}.tsx`),
+  join("src/pages/[locale]", pagePath, "index.tsx"),
+  join("app/[locale]", pagePath, "page.tsx"),
+  join("app/[locale]", pagePath, "_components", `${pagePath}.tsx`),
+]
+
 export const getPageContributorInfo = async (
   pagePath: string,
   locale: Lang,
   cache: CommitHistory
 ) => {
-  const gitContributors = [
-    ...(await fetchAndCacheGitContributors(
-      join("app/[locale]", pagePath, "page.tsx"),
-      cache
-    )),
-    ...(await fetchAndCacheGitContributors(
-      join("app/[locale]", pagePath, "_components", `${pagePath}.tsx`),
-      cache
-    )),
-  ]
+  const gitContributors = await getAllHistoricalPaths(pagePath).reduce(
+    async (acc, path) => {
+      const contributors = await fetchAndCacheGitContributors(path, cache)
+      return [...(await acc), ...contributors]
+    },
+    Promise.resolve([] as FileContributor[])
+  )
 
   const uniqueGitContributors = gitContributors.filter(
     (contributor, index, self) =>