Add settings update page

More dashboard UI work

src/MyWebLog/Features/Admin/AdminController.cs

@@ -1,4 +1,6 @@
-using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Rendering;
 
 namespace MyWebLog.Features.Admin;
 
@@ -6,6 +8,7 @@ namespace MyWebLog.Features.Admin;
 /// Controller for admin-specific displays and routes
 /// </summary>
 [Route("/admin")]
+[Authorize]
 public class AdminController : MyWebLogController
 {
     /// <inheritdoc />
@@ -18,6 +21,33 @@ public class AdminController : MyWebLogController
             Posts = await Db.Posts.CountByStatus(PostStatus.Published),
             Drafts = await Db.Posts.CountByStatus(PostStatus.Draft),
             Pages = await Db.Pages.CountAll(),
-            Categories = await Db.Categories.CountAll()
+            ListedPages = await Db.Pages.CountListed(),
+            Categories = await Db.Categories.CountAll(),
+            TopLevelCategories = await Db.Categories.CountTopLevel()
         });
+
+    [HttpGet("settings")]
+    public async Task<IActionResult> Settings() =>
+        View(new SettingsModel(WebLog)
+        {
+            DefaultPages = Enumerable.Repeat(new SelectListItem($"- {Resources.FirstPageOfPosts} -", "posts"), 1)
+                .Concat((await Db.Pages.FindAll()).Select(p => new SelectListItem(p.Title, p.Id)))
+        });
+
+    [HttpPost("settings")]
+    public async Task<IActionResult> SaveSettings(SettingsModel model)
+    {
+        var details = await Db.WebLogDetails.GetByHost(WebLog.UrlBase);
+        if (details is null) return NotFound();
+
+        model.PopulateSettings(details);
+        await Db.SaveChangesAsync();
+
+        // Update cache
+        WebLogCache.Set(WebLogCache.HostToDb(HttpContext), (await Db.WebLogDetails.FindByHost(WebLog.UrlBase))!);
+        
+        // TODO: confirmation message
+
+        return RedirectToAction(nameof(Index));
+    }
 }