feat: black magic

add config for `order` array, which determines the order in which all passed config functions for explorer will get executed in.

functions will now dynamically be called on `fileTree` via array accessor (e.g. fileTree["sort"].call(...)) with corresponding function from options being passed to call)

quartz/components/Explorer.tsx

@@ -22,6 +22,7 @@ const defaultOptions = (): Options => ({
       return -1
     }
   },
+  order: ["filter", "map", "sort"],
 })
 export default ((userOpts?: Partial<Options>) => {
   function Explorer({ allFiles, displayClass, fileData }: QuartzComponentProps) {
@@ -32,17 +33,33 @@ export default ((userOpts?: Partial<Options>) => {
     const fileTree = new FileNode("")
     allFiles.forEach((file) => fileTree.add(file, 1))
 
-    // Sort tree (folders first, then files (alphabetic))
-    fileTree.sort(opts.sortFn!)
-
-    // If provided, apply filter function to fileTree
-    if (opts.filterFn) {
-      fileTree.filter(opts.filterFn)
+    /**
+     * Keys of this object must match corresponding function name of `FileNode`,
+     * while values must be the argument that will be passed to the function.
+     *
+     * e.g. entry for FileNode.sort: `sort: opts.sortFn` (value is sort function from options)
+     */
+    const functions = {
+      map: opts.mapFn,
+      sort: opts.sortFn,
+      filter: opts.filterFn,
     }
 
-    // If provided, apply map function to fileTree
-    if (opts.mapFn) {
-      fileTree.map(opts.mapFn)
+    // Execute all functions (sort, filter, map) that were provided (if none were provided, only default "sort" is applied)
+    if (opts.order) {
+      // Order is important, use loop with index instead of order.map()
+      for (let i = 0; i < opts.order.length; i++) {
+        const functionName = opts.order[i]
+        if (functions[functionName]) {
+          // for every entry in order, call matching function in FileNode and pass matching argument
+          // e.g. i = 0; functionName = "filter"
+          // converted to: (if opts.filterFn) => fileTree.filter(opts.filterFn)
+
+          // @ts-ignore
+          // typescript cant statically check these dynamic references, so manually make sure reference is valid and ignore warning
+          fileTree[functionName].call(fileTree, functions[functionName])
+        }
+      }
     }
 
     // Get all folders of tree. Initialize with collapsed state