From 443cd53a1acf33ac0aaa34e0e75760d3da912d18 Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Tue, 19 Dec 2023 07:09:49 +0000
Subject: [PATCH] fix: mermaid rendering broken after rehype-pretty-code bump (closes #638)

---
 quartz/plugins/transformers/frontmatter.ts |   13 ++++++-------
 1 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/quartz/plugins/transformers/frontmatter.ts b/quartz/plugins/transformers/frontmatter.ts
index 017d3d1..d50217b 100644
--- a/quartz/plugins/transformers/frontmatter.ts
+++ b/quartz/plugins/transformers/frontmatter.ts
@@ -4,6 +4,7 @@
 import yaml from "js-yaml"
 import toml from "toml"
 import { slugTag } from "../../util/path"
+import { QuartzPluginData } from "../vfile"
 
 export interface Options {
   delims: string | string[]
@@ -28,7 +29,7 @@
         [remarkFrontmatter, ["yaml", "toml"]],
         () => {
           return (_, file) => {
-            const { data } = matter(file.value, {
+            const { data } = matter(Buffer.from(file.value), {
               ...opts,
               engines: {
                 yaml: (s) => yaml.load(s, { schema: yaml.JSON_SCHEMA }) as object,
@@ -44,6 +45,8 @@
             // coerce title to string
             if (data.title) {
               data.title = data.title.toString()
+            } else if (data.title === null || data.title === undefined) {
+              data.title = file.stem ?? "Untitled"
             }
 
             if (data.tags && !Array.isArray(data.tags)) {
@@ -54,14 +57,10 @@
             }
 
             // slug them all!!
-            data.tags = [...new Set(data.tags?.map((tag: string) => slugTag(tag)))] ?? []
+            data.tags = [...new Set(data.tags?.map((tag: string) => slugTag(tag)))]
 
             // fill in frontmatter
-            file.data.frontmatter = {
-              title: file.stem ?? "Untitled",
-              tags: [],
-              ...data,
-            }
+            file.data.frontmatter = data as QuartzPluginData["frontmatter"]
           }
         },
       ]

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