From b33f13ccaf4ec14a94ee0ee467dda04cf4981d00 Mon Sep 17 00:00:00 2001
From: Jacky Zhao <j.zhao2k19@gmail.com>
Date: Mon, 01 Jan 2024 22:20:34 +0000
Subject: [PATCH] fix: dont show last page if folder

---
 quartz/components/Breadcrumbs.tsx |   91 +++++++++++++++++++++++++--------------------
 1 files changed, 50 insertions(+), 41 deletions(-)

diff --git a/quartz/components/Breadcrumbs.tsx b/quartz/components/Breadcrumbs.tsx
index fb2f0c6..175f6f3 100644
--- a/quartz/components/Breadcrumbs.tsx
+++ b/quartz/components/Breadcrumbs.tsx
@@ -1,7 +1,6 @@
 import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
 import breadcrumbsStyle from "./styles/breadcrumbs.scss"
 import { FullSlug, SimpleSlug, resolveRelative } from "../util/path"
-import { capitalize } from "../util/lang"
 import { QuartzPluginData } from "../plugins/vfile"
 
 type CrumbData = {
@@ -26,38 +25,34 @@
    * Wether to display breadcrumbs on root `index.md`
    */
   hideOnRoot: boolean
+  /**
+   * Wether to display the current page in the breadcrumbs.
+   */
+  showCurrentPage: boolean
 }
 
 const defaultOptions: BreadcrumbOptions = {
-  spacerSymbol: ">",
+  spacerSymbol: "❯",
   rootName: "Home",
-  resolveFrontmatterTitle: false,
+  resolveFrontmatterTitle: true,
   hideOnRoot: true,
+  showCurrentPage: true,
 }
 
 function formatCrumb(displayName: string, baseSlug: FullSlug, currentSlug: SimpleSlug): CrumbData {
-  return { displayName, path: resolveRelative(baseSlug, currentSlug) }
-}
-
-// given a folderName (e.g. "features"), search for the corresponding `index.md` file
-function findCurrentFile(allFiles: QuartzPluginData[], folderName: string) {
-  return allFiles.find((file) => {
-    if (file.slug?.endsWith("index")) {
-      const folderParts = file.filePath?.split("/")
-      if (folderParts) {
-        const name = folderParts[folderParts?.length - 2]
-        if (name === folderName) {
-          return true
-        }
-      }
-    }
-  })
+  return {
+    displayName: displayName.replaceAll("-", " "),
+    path: resolveRelative(baseSlug, currentSlug),
+  }
 }
 
 export default ((opts?: Partial<BreadcrumbOptions>) => {
   // Merge options with defaults
   const options: BreadcrumbOptions = { ...defaultOptions, ...opts }
 
+  // computed index of folder name to its associated file data
+  let folderIndex: Map<string, QuartzPluginData> | undefined
+
   function Breadcrumbs({ fileData, allFiles, displayClass }: QuartzComponentProps) {
     // Hide crumbs on root if enabled
     if (options.hideOnRoot && fileData.slug === "index") {
@@ -65,39 +60,53 @@
     }
 
     // Format entry for root element
-    const firstEntry = formatCrumb(capitalize(options.rootName), fileData.slug!, "/" as SimpleSlug)
+    const firstEntry = formatCrumb(options.rootName, fileData.slug!, "/" as SimpleSlug)
     const crumbs: CrumbData[] = [firstEntry]
 
-    // Get parts of filePath (every folder)
-    const parts = fileData.filePath?.split("/")?.splice(1)
-    if (parts) {
-      // full path until current part
-      let current = ""
-      for (let i = 0; i < parts.length - 1; i++) {
-        const folderName = parts[i]
-        let currentTitle = folderName
-
-        // TODO: performance optimizations/memoizing
-        // Try to resolve frontmatter folder title
-        if (options?.resolveFrontmatterTitle) {
-          // try to find file for current path
-          const currentFile = findCurrentFile(allFiles, folderName)
-          if (currentFile) {
-            currentTitle = currentFile.frontmatter!.title
+    if (!folderIndex && options.resolveFrontmatterTitle) {
+      folderIndex = new Map()
+      // construct the index for the first time
+      for (const file of allFiles) {
+        if (file.slug?.endsWith("index")) {
+          const folderParts = file.slug?.split("/")
+          if (folderParts) {
+            // 2nd last to exclude the /index
+            const folderName = folderParts[folderParts?.length - 2]
+            folderIndex.set(folderName, file)
           }
         }
-        // Add current path to full path
-        current += folderName + "/"
+      }
+    }
+
+    // Split slug into hierarchy/parts
+    const slugParts = fileData.slug?.split("/")
+    if (slugParts) {
+      // full path until current part
+      let currentPath = ""
+      for (let i = 0; i < slugParts.length - 1; i++) {
+        let curPathSegment = slugParts[i]
+
+        // Try to resolve frontmatter folder title
+        const currentFile = folderIndex?.get(curPathSegment)
+        if (currentFile) {
+          const title = currentFile.frontmatter!.title
+          if (title !== "index") {
+            curPathSegment = title
+          }
+        }
+
+        // Add current slug to full path
+        currentPath += slugParts[i] + "/"
 
         // Format and add current crumb
-        const crumb = formatCrumb(capitalize(currentTitle), fileData.slug!, current as SimpleSlug)
+        const crumb = formatCrumb(curPathSegment, fileData.slug!, currentPath as SimpleSlug)
         crumbs.push(crumb)
       }
 
       // Add current file to crumb (can directly use frontmatter title)
-      if (parts.length > 0) {
+      if (options.showCurrentPage && slugParts.at(-1) === "") {
         crumbs.push({
-          displayName: capitalize(fileData.frontmatter!.title),
+          displayName: fileData.frontmatter!.title,
           path: "",
         })
       }

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