add readme candidate order

routes/dir/[...path].tsx

@@ -143,9 +143,16 @@ function isImageFile(path: string) {
   return /\.(jpg|jpeg|png|gif|webp|svg|bmp|ico|tiff)$/i.test(path);
 }
 
-function searchFiles(path: EntryInfo[], fn: (path: EntryInfo) => boolean) {
+function searchFiles(
+  path: EntryInfo[],
+  fn: (path: EntryInfo) => boolean,
+  opt: { order?: (a: EntryInfo, b: EntryInfo) => number } = {},
+) {
   const candiate = path.filter(fn);
   if (candiate.length > 0) {
+    if (opt.order) {
+      candiate.sort(opt.order);
+    }
     return candiate[0];
   }
   return null;
@@ -157,16 +164,24 @@ export default function DirLists(props: PageProps<DirOrFileProps>) {
   if (data.type === "dir") {
     cover = searchFiles(data.files, (f) => isImageFile(f.name));
     index = searchFiles(data.files, (f) => f.name === "index.html");
-    const contentFilenameCandidate = new Set([
+    const contentFilenameCandidate = [
       "SUMMARY.md",
       "README.md",
       "readme.md",
       "README.txt",
       "readme.txt",
-    ]);
+    ];
+    const contentFilenameCandidateSet = new Set(contentFilenameCandidate);
     content = searchFiles(
       data.files,
-      (f) => contentFilenameCandidate.has(f.name),
+      (f) => contentFilenameCandidateSet.has(f.name),
+      {
+        order: (a, b) => {
+          const aIndex = contentFilenameCandidate.indexOf(a.name);
+          const bIndex = contentFilenameCandidate.indexOf(b.name);
+          return (aIndex - bIndex);
+        },
+      },
     );
   }
   return (
@@ -205,8 +220,7 @@ export default function DirLists(props: PageProps<DirOrFileProps>) {
             >
               <RenderView
                 src={`/dir/${encodePath(join(data.path, content.name))}`}
-              >
-              </RenderView>
+              />
             </div>
           )
           : null}

test_data/e/readme.txt

@@ -0,0 +1 @@
+Readme

test_data/g/readme.txt

@@ -0,0 +1 @@
+Readme