Sorting: Renamed sort set to sort rule

Renamed based on feedback from Tim and Script on Discord.
Also fixed flaky test

app/Sorting/SortRuleController.php

@@ -0,0 +1,114 @@
+<?php
+
+namespace BookStack\Sorting;
+
+use BookStack\Activity\ActivityType;
+use BookStack\Http\Controller;
+use Illuminate\Http\Request;
+
+class SortRuleController extends Controller
+{
+    public function __construct()
+    {
+        $this->middleware('can:settings-manage');
+    }
+
+    public function create()
+    {
+        $this->setPageTitle(trans('settings.sort_rule_create'));
+
+        return view('settings.sort-rules.create');
+    }
+
+    public function store(Request $request)
+    {
+        $this->validate($request, [
+            'name' => ['required', 'string', 'min:1', 'max:200'],
+            'sequence' => ['required', 'string', 'min:1'],
+        ]);
+
+        $operations = SortRuleOperation::fromSequence($request->input('sequence'));
+        if (count($operations) === 0) {
+            return redirect()->withInput()->withErrors(['sequence' => 'No operations set.']);
+        }
+
+        $rule = new SortRule();
+        $rule->name = $request->input('name');
+        $rule->setOperations($operations);
+        $rule->save();
+
+        $this->logActivity(ActivityType::SORT_RULE_CREATE, $rule);
+
+        return redirect('/settings/sorting');
+    }
+
+    public function edit(string $id)
+    {
+        $rule = SortRule::query()->findOrFail($id);
+
+        $this->setPageTitle(trans('settings.sort_rule_edit'));
+
+        return view('settings.sort-rules.edit', ['rule' => $rule]);
+    }
+
+    public function update(string $id, Request $request, BookSorter $bookSorter)
+    {
+        $this->validate($request, [
+            'name' => ['required', 'string', 'min:1', 'max:200'],
+            'sequence' => ['required', 'string', 'min:1'],
+        ]);
+
+        $rule = SortRule::query()->findOrFail($id);
+        $operations = SortRuleOperation::fromSequence($request->input('sequence'));
+        if (count($operations) === 0) {
+            return redirect($rule->getUrl())->withInput()->withErrors(['sequence' => 'No operations set.']);
+        }
+
+        $rule->name = $request->input('name');
+        $rule->setOperations($operations);
+        $changedSequence = $rule->isDirty('sequence');
+        $rule->save();
+
+        $this->logActivity(ActivityType::SORT_RULE_UPDATE, $rule);
+
+        if ($changedSequence) {
+            $bookSorter->runBookAutoSortForAllWithSet($rule);
+        }
+
+        return redirect('/settings/sorting');
+    }
+
+    public function destroy(string $id, Request $request)
+    {
+        $rule = SortRule::query()->findOrFail($id);
+        $confirmed = $request->input('confirm') === 'true';
+        $booksAssigned = $rule->books()->count();
+        $warnings = [];
+
+        if ($booksAssigned > 0) {
+            if ($confirmed) {
+                $rule->books()->update(['sort_rule_id' => null]);
+            } else {
+                $warnings[] = trans('settings.sort_rule_delete_warn_books', ['count' => $booksAssigned]);
+            }
+        }
+
+        $defaultBookSortSetting = intval(setting('sorting-book-default', '0'));
+        if ($defaultBookSortSetting === intval($id)) {
+            if ($confirmed) {
+                setting()->remove('sorting-book-default');
+            } else {
+                $warnings[] = trans('settings.sort_rule_delete_warn_default');
+            }
+        }
+
+        if (count($warnings) > 0) {
+            return redirect($rule->getUrl() . '#delete')->withErrors(['delete' => $warnings]);
+        }
+
+        $rule->delete();
+        $this->logActivity(ActivityType::SORT_RULE_DELETE, $rule);
+
+        return redirect('/settings/sorting');
+    }
+}