feat: Option to mask folder count (#734)

* Option to mask folder count

* Update quartz/components/pages/FolderContent.tsx

---------

Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>

quartz/components/pages/FolderContent.tsx

@@ -8,40 +8,56 @@ import { Root } from "hast"
 import { pluralize } from "../../util/lang"
 import { htmlToJsx } from "../../util/jsx"
 
-function FolderContent(props: QuartzComponentProps) {
-  const { tree, fileData, allFiles } = props
-  const folderSlug = _stripSlashes(simplifySlug(fileData.slug!))
-  const allPagesInFolder = allFiles.filter((file) => {
-    const fileSlug = _stripSlashes(simplifySlug(file.slug!))
-    const prefixed = fileSlug.startsWith(folderSlug) && fileSlug !== folderSlug
-    const folderParts = folderSlug.split(path.posix.sep)
-    const fileParts = fileSlug.split(path.posix.sep)
-    const isDirectChild = fileParts.length === folderParts.length + 1
-    return prefixed && isDirectChild
-  })
-
-  const listProps = {
-    ...props,
-    allFiles: allPagesInFolder,
-  }
-
-  const content =
-    (tree as Root).children.length === 0
-      ? fileData.description
-      : htmlToJsx(fileData.filePath!, tree)
-
-  return (
-    <div class="popover-hint">
-      <article>
-        <p>{content}</p>
-      </article>
-      <p>{pluralize(allPagesInFolder.length, "item")} under this folder.</p>
-      <div>
-        <PageList {...listProps} />
-      </div>
-    </div>
-  )
+interface FolderContentOptions {
+  /**
+   * Whether to display number of folders
+   */
+  showFolderCount: boolean
 }
 
-FolderContent.css = style + PageList.css
-export default (() => FolderContent) satisfies QuartzComponentConstructor
+const defaultOptions: FolderContentOptions = {
+  showFolderCount: true,
+}
+
+export default ((opts?: Partial<FolderContentOptions>) => {
+  // Merge options with defaults
+  const options: FolderContentOptions = { ...defaultOptions, ...opts }
+
+  function FolderContent(props: QuartzComponentProps) {
+    const { tree, fileData, allFiles } = props
+    const folderSlug = _stripSlashes(simplifySlug(fileData.slug!))
+    const allPagesInFolder = allFiles.filter((file) => {
+      const fileSlug = _stripSlashes(simplifySlug(file.slug!))
+      const prefixed = fileSlug.startsWith(folderSlug) && fileSlug !== folderSlug
+      const folderParts = folderSlug.split(path.posix.sep)
+      const fileParts = fileSlug.split(path.posix.sep)
+      const isDirectChild = fileParts.length === folderParts.length + 1
+      return prefixed && isDirectChild
+    })
+
+    const listProps = {
+      ...props,
+      allFiles: allPagesInFolder,
+    }
+
+    const content =
+      (tree as Root).children.length === 0
+        ? fileData.description
+        : htmlToJsx(fileData.filePath!, tree)
+
+    return (
+      <div class="popover-hint">
+        <article>
+          <p>{content}</p>
+        </article>
+        {options.showFolderCount && <p>{pluralize(allPagesInFolder.length, "item")} under this folder.</p>}
+        <div>
+          <PageList {...listProps} />
+        </div>
+      </div>
+    )
+  }
+
+  FolderContent.css = style + PageList.css
+  return FolderContent
+}) satisfies QuartzComponentConstructor