From e4c370ede5f8b872a066a1eed1b6a71da960b68f Mon Sep 17 00:00:00 2001
From: PrinOrange <prinorange@outlook.com>
Date: Sat, 6 Jan 2024 16:18:34 +0800
Subject: [PATCH] Fixed the issue of not being able to recognize differences in
 upper and lower case, resulting in duplication of labels

---
 lib/post-process.ts |  5 +++--
 lib/utils.ts        | 14 ++++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/lib/post-process.ts b/lib/post-process.ts
index 19390f7..978a0ee 100644
--- a/lib/post-process.ts
+++ b/lib/post-process.ts
@@ -4,7 +4,7 @@ import { TPostListItem, TTagSubPostSet } from "@/types/post-list";
 import fs from "fs";
 import { serialize } from "next-mdx-remote/serialize";
 import path from "path";
-import { nullifyEmptyString } from "./utils";
+import { capitalizeFirstLetter, nullifyEmptyString } from "./utils";
 
 async function getFrontmatters(filepath: string): Promise<TFrontmatter> {
   const source = fs.readFileSync(filepath, "utf-8");
@@ -45,6 +45,7 @@ const sortOutPostLists = async (): Promise<{
   for (let i = 0; i < postFilePaths.length; i++) {
     const frontmatter = await getFrontmatters(postFilePaths[i]);
     const postId = path.parse(postFilePaths[i]).name;
+    const capitalizedTags = frontmatter.tags?.map((tagname) => capitalizeFirstLetter(tagname));
 
     const postListItem: TPostListItem = {
       id: postId,
@@ -52,7 +53,7 @@ const sortOutPostLists = async (): Promise<{
         title: frontmatter.title,
         subtitle: nullifyEmptyString(frontmatter.subtitle),
         coverURL: nullifyEmptyString(frontmatter.coverURL),
-        tags: frontmatter.tags ?? [],
+        tags: capitalizedTags ?? [],
         summary: nullifyEmptyString(frontmatter.summary),
         time: frontmatter.time,
         pin: frontmatter.pin ?? false,
diff --git a/lib/utils.ts b/lib/utils.ts
index f50de2f..8d09b92 100644
--- a/lib/utils.ts
+++ b/lib/utils.ts
@@ -56,3 +56,17 @@ export function isEmptyString(value: string | null | undefined): boolean {
   }
   return false;
 }
+
+/**
+ * Capitalizes the first letter of each word in a string.
+ *
+ * @param str - The input string.
+ * @returns The string with the first letter of each word capitalized.
+ */
+export function capitalizeFirstLetter(str: string) {
+  return str
+    .toLowerCase()
+    .split(" ")
+    .map((word) => word.charAt(0).toUpperCase() + word.slice(1))
+    .join(" ");
+}