loading states

Management/Services/Files/LoadMarkdownCourse.cs

@@ -1,4 +1,5 @@
 using LocalModels;
+
 using Management.Services;
 
 public class CourseMarkdownLoader
@@ -38,14 +39,23 @@ public class CourseMarkdownLoader
       throw new LoadCourseFromFileException(errorMessage);
     }
 
-    LocalCourseSettings settings = await loadCourseSettings(courseDirectory);
+    try
-    var modules = await loadCourseModules(courseDirectory);
-
-    return new()
     {
-      Settings = settings,
+
-      Modules = modules
+      LocalCourseSettings settings = await loadCourseSettings(courseDirectory);
-    };
+      var modules = await loadCourseModules(courseDirectory);
+
+      return new()
+      {
+        Settings = settings,
+        Modules = modules
+      };
+    }
+    catch (Exception)
+    {
+      Console.WriteLine($"failed to load course at path: ${courseDirectory}");
+      throw;
+    }
   }
 
   private async Task<LocalCourseSettings> loadCourseSettings(string courseDirectory)
@@ -106,7 +116,15 @@ public class CourseMarkdownLoader
       .Select(async filePath =>
       {
         var rawFile = (await File.ReadAllTextAsync(filePath)).Replace("\r\n", "\n");
-        return LocalAssignment.ParseMarkdown(rawFile);
+        try
+        {
+          return LocalAssignment.ParseMarkdown(rawFile);
+        }
+        catch
+        {
+          Console.WriteLine($"error loading assignment at path {filePath}");
+          throw;
+        }
       })
       .ToArray();
     return await Task.WhenAll(assignmentPromises);
@@ -145,8 +163,17 @@ public class CourseMarkdownLoader
     var pagePromises = pageFiles
       .Select(async path =>
       {
+
         var rawPage = (await File.ReadAllTextAsync(path)).Replace("\r\n", "\n");
-        return LocalCoursePage.ParseMarkdown(rawPage);
+        try
+        {
+          return LocalCoursePage.ParseMarkdown(rawPage);
+        }
+        catch
+        {
+          Console.WriteLine($"error loading page at path {path}");
+          throw;
+        }
       })
       .ToArray();
 

nextjs/src/app/CourseList.tsx

@@ -7,8 +7,8 @@ export default function CourseList() {
   return (
     <div>
       {courses.map((c) => (
-        <Link href={`/course/${c.settings.name}`} key={c.settings.name}>
+        <Link href={`/course/${c}`} key={c}>
-          {c.settings.name}{" "}
+          {c}{" "}
         </Link>
       ))}
     </div>

nextjs/src/app/course/[courseName]/loading.tsx

@@ -0,0 +1,10 @@
+import { Spinner } from "@/components/Spinner";
+import React from "react";
+
+export default function Loading() {
+  return (
+    <div>
+      <Spinner />
+    </div>
+  );
+}

nextjs/src/components/Spinner.tsx

@@ -0,0 +1,10 @@
+import React from "react";
+import "./spinner.css"
+
+export const Spinner = () => {
+  return (
+    <div className="text-center m-3">
+      <span className="loader"></span>
+    </div>
+  );
+};

nextjs/src/components/spinner.css

@@ -0,0 +1,56 @@
+.loader {
+  width: 48px;
+  height: 48px;
+  border-radius: 50%;
+  display: inline-block;
+  position: relative;
+  border: 3px solid;
+  border-color: #6c757d #6c757d transparent transparent;
+  box-sizing: border-box;
+  animation: rotation 2s linear infinite;
+}
+.loader::after,
+.loader::before {
+  content: '';  
+  box-sizing: border-box;
+  position: absolute;
+  left: 0;
+  right: 0;
+  top: 0;
+  bottom: 0;
+  margin: auto;
+  border: 3px solid;
+  border-color: transparent transparent #092565 #092565;
+  width: 40px;
+  height: 40px;
+  border-radius: 50%;
+  box-sizing: border-box;
+  animation: rotationBack 1s linear infinite;
+  transform-origin: center center;
+}
+/* #092565 */
+/* #3a0647 */
+.loader::before {
+  width: 32px;
+  height: 32px;
+  border-color: #6c757d #6c757d transparent transparent;
+  animation: rotation 3s linear infinite;
+}
+    
+@keyframes rotation {
+  0% {
+    transform: rotate(0deg);
+  }
+  100% {
+    transform: rotate(360deg);
+  }
+} 
+@keyframes rotationBack {
+  0% {
+    transform: rotate(0deg);
+  }
+  100% {
+    transform: rotate(-360deg);
+  }
+}
+