fix: auto select file when a folder is selected

public/script/app.js

@@ -1505,7 +1505,9 @@ angular
           return;
         }
         $scope.filePath = $routeParams.path || "";
-        $scope.paths = $scope.filePath.split("/");
+        $scope.paths = $scope.filePath
+          .split("/")
+          .filter((f) => f && f.trim().length > 0);
 
         if ($scope.repoId != $routeParams.repoId) {
           return init();
@@ -1514,19 +1516,7 @@ angular
         updateContent();
       });
 
-      function getFiles(callback) {
+      function selectFile() {
-        $http.get(`/api/repo/${$scope.repoId}/files/`).then(
-          (res) => {
-            $scope.files = res.data;
-            if ($scope.paths.length == 0 || $scope.paths[0] == "") {
-              // redirect to readme
-              const readmeCandidates = {};
-              for (const file in $scope.files) {
-                if (file.toLowerCase().indexOf("readme") > -1) {
-                  readmeCandidates[file.toLowerCase()] = file;
-                }
-              }
-
         const readmePriority = [
           "readme.md",
           "readme.txt",
@@ -1534,6 +1524,23 @@ angular
           "readme.1st",
           "readme",
         ];
+        // find current folder
+        let currentFolder = $scope.files;
+        for (const p of $scope.paths) {
+          if (currentFolder[p]) {
+            currentFolder = currentFolder[p];
+          }
+        }
+        if (currentFolder.size && Number.isInteger(currentFolder.size)) {
+          // a file is already selected
+          return;
+        }
+        const readmeCandidates = {};
+        for (const file in currentFolder) {
+          if (file.toLowerCase().indexOf("readme") > -1) {
+            readmeCandidates[file.toLowerCase()] = file;
+          }
+        }
         let best_match = null;
         for (const p of readmePriority) {
           if (readmeCandidates[p]) {
@@ -1553,6 +1560,11 @@ angular
           $location.url(uri + readmeCandidates[best_match]);
         }
       }
+      function getFiles(callback) {
+        $http.get(`/api/repo/${$scope.repoId}/files/`).then(
+          (res) => {
+            $scope.files = res.data;
+            selectFile();
             if (callback) {
               return callback();
             }