From 1224c7d32fd2e6d4029fd34aaf6aeb3ef234d239 Mon Sep 17 00:00:00 2001
From: Aaron Pham <Aaronpham0103@gmail.com>
Date: Mon, 05 Aug 2024 19:17:11 +0000
Subject: [PATCH] refactor(comments): move script to files (#1308)

---
 docs/features/explorer.md |  288 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 283 insertions(+), 5 deletions(-)

diff --git a/docs/features/explorer.md b/docs/features/explorer.md
index 17647de..95878f7 100644
--- a/docs/features/explorer.md
+++ b/docs/features/explorer.md
@@ -4,9 +4,11 @@
   - component
 ---
 
-Quartz features an explorer that allows you to navigate all files and folders on your site. It supports nested folders and has options for customization.
+Quartz features an explorer that allows you to navigate all files and folders on your site. It supports nested folders and is highly customizable.
 
-By default, it will show all folders and files on your page. To display the explorer in a different spot, you can edit the [[layout]].
+By default, it shows all folders and files on your page. To display the explorer in a different spot, you can edit the [[layout]].
+
+Display names for folders get determined by the `title` frontmatter field in `folder/index.md` (more detail in [[authoring content | Authoring Content]]). If this file does not exist or does not contain frontmatter, the local folder name will be used instead.
 
 > [!info]
 > The explorer uses local storage by default to save the state of your explorer. This is done to ensure a smooth experience when navigating to different pages.
@@ -24,7 +26,15 @@
   title: "Explorer", // title of the explorer component
   folderClickBehavior: "collapse", // what happens when you click a folder ("link" to navigate to folder page on click or "collapse" to collapse folder on click)
   folderDefaultState: "collapsed", // default state of folders ("collapsed" or "open")
-  useSavedState: true, // wether to use local storage to save "state" (which folders are opened) of explorer
+  useSavedState: true, // whether to use local storage to save "state" (which folders are opened) of explorer
+  // Sort order: folders first, then files. Sort folders and files alphabetically
+  sortFn: (a, b) => {
+    ... // default implementation shown later
+  },
+  filterFn: filterFn: (node) => node.name !== "tags", // filters out 'tags' folder
+  mapFn: undefined,
+  // what order to apply functions in
+  order: ["filter", "map", "sort"],
 })
 ```
 
@@ -32,10 +42,278 @@
 
 Want to customize it even more?
 
-- Removing table of contents: remove `Component.Explorer()` from `quartz.layout.ts`
-  - (optional): After removing the explorer component, you can move the [[table of contents]] component back to the `left` part of the layout
+- Removing explorer: remove `Component.Explorer()` from `quartz.layout.ts`
+  - (optional): After removing the explorer component, you can move the [[table of contents | Table of Contents]] component back to the `left` part of the layout
+- Changing `sort`, `filter` and `map` behavior: explained in [[#Advanced customization]]
 - Component:
   - Wrapper (Outer component, generates file tree, etc): `quartz/components/Explorer.tsx`
   - Explorer node (recursive, either a folder or a file): `quartz/components/ExplorerNode.tsx`
 - Style: `quartz/components/styles/explorer.scss`
 - Script: `quartz/components/scripts/explorer.inline.ts`
+
+## Advanced customization
+
+This component allows you to fully customize all of its behavior. You can pass a custom `sort`, `filter` and `map` function.
+All functions you can pass work with the `FileNode` class, which has the following properties:
+
+```ts title="quartz/components/ExplorerNode.tsx" {2-5}
+export class FileNode {
+  children: FileNode[]  // children of current node
+  name: string  // last part of slug
+  displayName: string // what actually should be displayed in the explorer
+  file: QuartzPluginData | null // if node is a file, this is the file's metadata. See `QuartzPluginData` for more detail
+  depth: number // depth of current node
+
+  ... // rest of implementation
+}
+```
+
+Every function you can pass is optional. By default, only a `sort` function will be used:
+
+```ts title="Default sort function"
+// Sort order: folders first, then files. Sort folders and files alphabetically
+Component.Explorer({
+  sortFn: (a, b) => {
+    if ((!a.file && !b.file) || (a.file && b.file)) {
+      // sensitivity: "base": Only strings that differ in base letters compare as unequal. Examples: a ≠ b, a = á, a = A
+      // numeric: true: Whether numeric collation should be used, such that "1" < "2" < "10"
+      return a.displayName.localeCompare(b.displayName, undefined, {
+        numeric: true,
+        sensitivity: "base",
+      })
+    }
+    if (a.file && !b.file) {
+      return 1
+    } else {
+      return -1
+    }
+  },
+})
+```
+
+---
+
+You can pass your own functions for `sortFn`, `filterFn` and `mapFn`. All functions will be executed in the order provided by the `order` option (see [[#Customization]]). These functions behave similarly to their `Array.prototype` counterpart, except they modify the entire `FileNode` tree in place instead of returning a new one.
+
+For more information on how to use `sort`, `filter` and `map`, you can check [Array.prototype.sort()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort), [Array.prototype.filter()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter) and [Array.prototype.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map).
+
+Type definitions look like this:
+
+```ts
+sortFn: (a: FileNode, b: FileNode) => number
+filterFn: (node: FileNode) => boolean
+mapFn: (node: FileNode) => void
+```
+
+> [!tip]
+> You can check if a `FileNode` is a folder or a file like this:
+>
+> ```ts
+> if (node.file) {
+>   // node is a file
+> } else {
+>   // node is a folder
+> }
+> ```
+
+## Basic examples
+
+These examples show the basic usage of `sort`, `map` and `filter`.
+
+### Use `sort` to put files first
+
+Using this example, the explorer will alphabetically sort everything, but put all **files** above all **folders**.
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  sortFn: (a, b) => {
+    if ((!a.file && !b.file) || (a.file && b.file)) {
+      return a.displayName.localeCompare(b.displayName)
+    }
+    if (a.file && !b.file) {
+      return -1
+    } else {
+      return 1
+    }
+  },
+})
+```
+
+### Change display names (`map`)
+
+Using this example, the display names of all `FileNodes` (folders + files) will be converted to full upper case.
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  mapFn: (node) => {
+    node.displayName = node.displayName.toUpperCase()
+  },
+})
+```
+
+### Remove list of elements (`filter`)
+
+Using this example, you can remove elements from your explorer by providing an array of folders/files using the `omit` set.
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  filterFn: (node) => {
+    // set containing names of everything you want to filter out
+    const omit = new Set(["authoring content", "tags", "hosting"])
+    return !omit.has(node.name.toLowerCase())
+  },
+})
+```
+
+You can customize this by changing the entries of the `omit` set. Simply add all folder or file names you want to remove.
+
+### Remove files by tag
+
+You can access the frontmatter of a file by `node.file?.frontmatter?`. This allows you to filter out files based on their frontmatter, for example by their tags.
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  filterFn: (node) => {
+    // exclude files with the tag "explorerexclude"
+    return node.file?.frontmatter?.tags?.includes("explorerexclude") !== true
+  },
+})
+```
+
+### Show every element in explorer
+
+To override the default filter function that removes the `tags` folder from the explorer, you can set the filter function to `undefined`.
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  filterFn: undefined, // apply no filter function, every file and folder will visible
+})
+```
+
+## Advanced examples
+
+> [!tip]
+> When writing more complicated functions, the `layout` file can start to look very cramped.
+> You can fix this by defining your functions in another file.
+>
+> ```ts title="functions.ts"
+> import { Options } from "./quartz/components/ExplorerNode"
+> export const mapFn: Options["mapFn"] = (node) => {
+>   // implement your function here
+> }
+> export const filterFn: Options["filterFn"] = (node) => {
+>   // implement your function here
+> }
+> export const sortFn: Options["sortFn"] = (a, b) => {
+>   // implement your function here
+> }
+> ```
+>
+> You can then import them like this:
+>
+> ```ts title="quartz.layout.ts"
+> import { mapFn, filterFn, sortFn } from "./functions.ts"
+> Component.Explorer({
+>   mapFn: mapFn,
+>   filterFn: filterFn,
+>   sortFn: sortFn,
+> })
+> ```
+
+### Add emoji prefix
+
+To add emoji prefixes (📁 for folders, 📄 for files), you could use a map function like this:
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  mapFn: (node) => {
+    // dont change name of root node
+    if (node.depth > 0) {
+      // set emoji for file/folder
+      if (node.file) {
+        node.displayName = "📄 " + node.displayName
+      } else {
+        node.displayName = "📁 " + node.displayName
+      }
+    }
+  },
+})
+```
+
+### Putting it all together
+
+In this example, we're going to customize the explorer by using functions from examples above to [[#Add emoji prefix | add emoji prefixes]], [[#remove-list-of-elements-filter| filter out some folders]] and [[#use-sort-to-put-files-first | sort with files above folders]].
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  filterFn: sampleFilterFn,
+  mapFn: sampleMapFn,
+  sortFn: sampleSortFn,
+  order: ["filter", "sort", "map"],
+})
+```
+
+Notice how we customized the `order` array here. This is done because the default order applies the `sort` function last. While this normally works well, it would cause unintended behavior here, since we changed the first characters of all display names. In our example, `sort` would be applied based off the emoji prefix instead of the first _real_ character.
+
+To fix this, we just changed around the order and apply the `sort` function before changing the display names in the `map` function.
+
+### Use `sort` with pre-defined sort order
+
+Here's another example where a map containing file/folder names (as slugs) is used to define the sort order of the explorer in quartz. All files/folders that aren't listed inside of `nameOrderMap` will appear at the top of that folders hierarchy level.
+
+It's also worth mentioning, that the smaller the number set in `nameOrderMap`, the higher up the entry will be in the explorer. Incrementing every folder/file by 100, makes ordering files in their folders a lot easier. Lastly, this example still allows you to use a `mapFn` or frontmatter titles to change display names, as it uses slugs for `nameOrderMap` (which is unaffected by display name changes).
+
+```ts title="quartz.layout.ts"
+Component.Explorer({
+  sortFn: (a, b) => {
+    const nameOrderMap: Record<string, number> = {
+      "poetry-folder": 100,
+      "essay-folder": 200,
+      "research-paper-file": 201,
+      "dinosaur-fossils-file": 300,
+      "other-folder": 400,
+    }
+
+    let orderA = 0
+    let orderB = 0
+
+    if (a.file && a.file.slug) {
+      orderA = nameOrderMap[a.file.slug] || 0
+    } else if (a.name) {
+      orderA = nameOrderMap[a.name] || 0
+    }
+
+    if (b.file && b.file.slug) {
+      orderB = nameOrderMap[b.file.slug] || 0
+    } else if (b.name) {
+      orderB = nameOrderMap[b.name] || 0
+    }
+
+    return orderA - orderB
+  },
+})
+```
+
+For reference, this is how the quartz explorer window would look like with that example:
+
+```
+📖 Poetry Folder
+📑 Essay Folder
+    ⚗️ Research Paper File
+🦴 Dinosaur Fossils File
+🔮 Other Folder
+```
+
+And this is how the file structure would look like:
+
+```
+index.md
+poetry-folder
+    index.md
+essay-folder
+    index.md
+    research-paper-file.md
+dinosaur-fossils-file.md
+other-folder
+    index.md
+```

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