From 8fd75ffbfda30edd5a134a1fbf9b81ac3cebb2ff Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Mon, 24 Jul 2023 00:42:00 +0000
Subject: [PATCH] support attachments folder

---
 quartz/plugins/transformers/frontmatter.ts |   75 ++++++++++++++++++++++---------------
 1 files changed, 44 insertions(+), 31 deletions(-)

diff --git a/quartz/plugins/transformers/frontmatter.ts b/quartz/plugins/transformers/frontmatter.ts
index 778faac..29b0b4b 100644
--- a/quartz/plugins/transformers/frontmatter.ts
+++ b/quartz/plugins/transformers/frontmatter.ts
@@ -1,51 +1,64 @@
-import { PluggableList } from "unified"
 import matter from "gray-matter"
-import remarkFrontmatter from 'remark-frontmatter'
+import remarkFrontmatter from "remark-frontmatter"
 import { QuartzTransformerPlugin } from "../types"
+import yaml from "js-yaml"
+import { slug as slugAnchor } from "github-slugger"
 
 export interface Options {
-  language: 'yaml' | 'toml',
+  language: "yaml" | "toml"
   delims: string | string[]
 }
 
 const defaultOptions: Options = {
-  language: 'yaml',
-  delims: '---'
+  language: "yaml",
+  delims: "---",
 }
 
-export class FrontMatter extends QuartzTransformerPlugin {
-  name = "FrontMatter"
-  opts: Options
+export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined> = (userOpts) => {
+  const opts = { ...defaultOptions, ...userOpts }
+  return {
+    name: "FrontMatter",
+    markdownPlugins() {
+      return [
+        remarkFrontmatter,
+        () => {
+          return (_, file) => {
+            const { data } = matter(file.value, {
+              ...opts,
+              engines: {
+                yaml: (s) => yaml.load(s, { schema: yaml.JSON_SCHEMA }) as object,
+              },
+            })
 
-  constructor(opts?: Options) {
-    super()
-    this.opts = { ...defaultOptions, ...opts }
-  }
+            // tag is an alias for tags
+            if (data.tag) {
+              data.tags = data.tag
+            }
 
-  markdownPlugins(): PluggableList {
-    return [
-      remarkFrontmatter,
-      () => {
-        return (_, file) => {
-          const { data } = matter(file.value, this.opts)
+            if (data.tags && !Array.isArray(data.tags)) {
+              data.tags = data.tags
+                .toString()
+                .split(",")
+                .map((tag: string) => tag.trim())
+            }
 
-          // fill in frontmatter
-          file.data.frontmatter = {
-            title: file.stem ?? "Untitled",
-            tags: [],
-            ...data
+            // slug them all!!
+            data.tags = data.tags?.map((tag: string) => slugAnchor(tag)) ?? []
+
+            // fill in frontmatter
+            file.data.frontmatter = {
+              title: file.stem ?? "Untitled",
+              tags: [],
+              ...data,
+            }
           }
-        }
-      }
-    ]
-  }
-
-  htmlPlugins(): PluggableList {
-    return []
+        },
+      ]
+    },
   }
 }
 
-declare module 'vfile' {
+declare module "vfile" {
   interface DataMap {
     frontmatter: { [key: string]: any } & {
       title: string

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