feat: adicionar reordenação por drag-and-drop para cursos módulos e aulas

src/components/AdminContentManager.tsx

@@ -1,7 +1,8 @@
 import React, { useState, useEffect } from 'react';
 import { 
   GraduationCap, Plus, Edit, Trash2, FolderPlus, FilePlus, ChevronRight, 
-  ArrowLeft, Film, Youtube, RefreshCw, Layers, CheckCircle, CheckCircle2
+  ArrowLeft, Film, Youtube, RefreshCw, Layers, CheckCircle, CheckCircle2,
+  GripVertical
 } from 'lucide-react';
 import { useModal } from '../contexts/ModalContext';
 
@@ -75,6 +76,128 @@ export default function AdminContentManager({ token }: AdminContentManagerProps)
 
   const [uploadingImage, setUploadingImage] = useState(false);
 
+  // Drag and Drop States
+  const [draggedCourseIndex, setDraggedCourseIndex] = useState<number | null>(null);
+  const [draggedModuleIndex, setDraggedModuleIndex] = useState<number | null>(null);
+  const [draggedLessonInfo, setDraggedLessonInfo] = useState<{ lessonId: string, moduleId: string, index: number } | null>(null);
+
+  const handleCourseDragStart = (e: React.DragEvent, index: number) => {
+    setDraggedCourseIndex(index);
+    e.dataTransfer.effectAllowed = 'move';
+  };
+
+  const handleCourseDragOver = (e: React.DragEvent) => {
+    e.preventDefault();
+  };
+
+  const handleCourseDrop = async (e: React.DragEvent, targetIndex: number) => {
+    e.preventDefault();
+    if (draggedCourseIndex === null || draggedCourseIndex === targetIndex) return;
+
+    const reorderedCourses = [...courses];
+    const [draggedCourse] = reorderedCourses.splice(draggedCourseIndex, 1);
+    reorderedCourses.splice(targetIndex, 0, draggedCourse);
+
+    setCourses(reorderedCourses);
+    setDraggedCourseIndex(null);
+
+    const itemsToSave = reorderedCourses.map((c, idx) => ({ id: c.id, order: idx + 1 }));
+    try {
+      await fetch('/api/admin/reorder', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': `Bearer ${token}`
+        },
+        body: JSON.stringify({ type: 'courses', items: itemsToSave })
+      });
+    } catch (err) {
+      console.error('Error reordering courses:', err);
+    }
+  };
+
+  const handleModuleDragStart = (e: React.DragEvent, index: number) => {
+    setDraggedModuleIndex(index);
+    e.dataTransfer.effectAllowed = 'move';
+  };
+
+  const handleModuleDragOver = (e: React.DragEvent) => {
+    e.preventDefault();
+  };
+
+  const handleModuleDrop = async (e: React.DragEvent, targetIndex: number) => {
+    e.preventDefault();
+    if (draggedModuleIndex === null || draggedModuleIndex === targetIndex) return;
+
+    const reorderedModules = [...modules];
+    const [draggedModule] = reorderedModules.splice(draggedModuleIndex, 1);
+    reorderedModules.splice(targetIndex, 0, draggedModule);
+
+    const updatedModules = reorderedModules.map((m, idx) => ({ ...m, order: idx + 1 }));
+    setModules(updatedModules);
+    setDraggedModuleIndex(null);
+
+    const itemsToSave = updatedModules.map((m) => ({ id: m.id, order: m.order }));
+    try {
+      await fetch('/api/admin/reorder', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': `Bearer ${token}`
+        },
+        body: JSON.stringify({ type: 'modules', items: itemsToSave })
+      });
+    } catch (err) {
+      console.error('Error reordering modules:', err);
+    }
+  };
+
+  const handleLessonDragStart = (e: React.DragEvent, lessonId: string, moduleId: string, index: number) => {
+    setDraggedLessonInfo({ lessonId, moduleId, index });
+    e.dataTransfer.effectAllowed = 'move';
+  };
+
+  const handleLessonDragOver = (e: React.DragEvent) => {
+    e.preventDefault();
+  };
+
+  const handleLessonDrop = async (e: React.DragEvent, targetModuleId: string, targetIndex: number) => {
+    e.preventDefault();
+    if (!draggedLessonInfo || draggedLessonInfo.moduleId !== targetModuleId || draggedLessonInfo.index === targetIndex) return;
+
+    const targetModule = modules.find(m => m.id === targetModuleId);
+    if (!targetModule) return;
+
+    const reorderedLessons = [...targetModule.lessons];
+    const [draggedLesson] = reorderedLessons.splice(draggedLessonInfo.index, 1);
+    reorderedLessons.splice(targetIndex, 0, draggedLesson);
+
+    const updatedLessons = reorderedLessons.map((l, idx) => ({ ...l, order: idx + 1 }));
+    
+    const updatedModules = modules.map(m => {
+      if (m.id === targetModuleId) {
+        return { ...m, lessons: updatedLessons };
+      }
+      return m;
+    });
+    setModules(updatedModules);
+    setDraggedLessonInfo(null);
+
+    const itemsToSave = updatedLessons.map((l) => ({ id: l.id, order: l.order }));
+    try {
+      await fetch('/api/admin/reorder', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': `Bearer ${token}`
+        },
+        body: JSON.stringify({ type: 'lessons', items: itemsToSave })
+      });
+    } catch (err) {
+      console.error('Error reordering lessons:', err);
+    }
+  };
+
   const handleImageUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
     const file = e.target.files?.[0];
     if (!file) return;
@@ -817,11 +940,19 @@ export default function AdminContentManager({ token }: AdminContentManagerProps)
               </div>
             ) : (
               modules.map((mod, modIdx) => (
-                <div key={mod.id} className="glass-card rounded-xl overflow-hidden">
+                <div 
+                  key={mod.id} 
+                  className="glass-card rounded-xl overflow-hidden"
+                  draggable
+                  onDragStart={(e) => handleModuleDragStart(e, modIdx)}
+                  onDragOver={handleModuleDragOver}
+                  onDrop={(e) => handleModuleDrop(e, modIdx)}
+                >
                   
                   {/* Module Header Panel */}
                   <div className="glass-accordion-header px-4 py-3 flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
-                    <div className="flex items-center space-x-2">
+                    <div className="flex items-center space-x-2 cursor-grab active:cursor-grabbing">
+                      <GripVertical className="w-4 h-4 text-zinc-500" />
                       <span className="bg-zinc-800 border border-zinc-700 text-[#E50914] text-[10px] font-extrabold px-1.5 py-0.5 rounded">
                         M{mod.order}
                       </span>
@@ -875,9 +1006,17 @@ export default function AdminContentManager({ token }: AdminContentManagerProps)
                     {mod.lessons.length === 0 ? (
                       <div className="p-4 text-xs text-zinc-600 italic text-center">Nenhuma aula cadastrada neste módulo.</div>
                     ) : (
-                      mod.lessons.map(lesson => (
+                      mod.lessons.map((lesson, lessonIdx) => (
-                        <div key={lesson.id} className="px-6 py-3 flex items-center justify-between text-xs hover:bg-zinc-900/10 transition-colors">
+                        <div 
-                          <div className="flex items-center space-x-3 min-w-0">
+                          key={lesson.id} 
+                          className="px-6 py-3 flex items-center justify-between text-xs hover:bg-zinc-900/10 transition-colors"
+                          draggable
+                          onDragStart={(e) => handleLessonDragStart(e, lesson.id, mod.id, lessonIdx)}
+                          onDragOver={handleLessonDragOver}
+                          onDrop={(e) => handleLessonDrop(e, mod.id, lessonIdx)}
+                        >
+                          <div className="flex items-center space-x-3 min-w-0 cursor-grab active:cursor-grabbing">
+                            <GripVertical className="w-3.5 h-3.5 text-zinc-600 flex-shrink-0" />
                             <span className="text-zinc-500 font-mono font-bold w-4 text-right">#{lesson.order}</span>
                             {lesson.videoType === 'youtube' ? (
                               <Youtube className="w-4 h-4 text-red-500 flex-shrink-0" />
@@ -921,18 +1060,25 @@ export default function AdminContentManager({ token }: AdminContentManagerProps)
       ) : (
         /* --- LIST ALL COURSES IN CATALOGUE --- */
         <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
-          {courses.map(course => (
+          {courses.map((course, courseIdx) => (
             <div 
               key={course.id} 
               className="glass-card rounded-2xl overflow-hidden flex flex-col justify-between"
+              draggable
+              onDragStart={(e) => handleCourseDragStart(e, courseIdx)}
+              onDragOver={handleCourseDragOver}
+              onDrop={(e) => handleCourseDrop(e, courseIdx)}
             >
               <div>
                 {/* Thumbnail */}
-                <div className="relative w-full aspect-video">
+                <div className="relative w-full aspect-video cursor-grab active:cursor-grabbing">
                   <img src={course.thumbnail} alt={course.title} className="w-full h-full object-cover" referrerPolicy="no-referrer" />
                   <span className="absolute top-3 left-3 bg-[#E50914]/85 text-white text-[10px] font-black px-2 py-0.5 rounded uppercase tracking-wider glass-badge">
                     {course.category}
                   </span>
+                  <span className="absolute top-3 right-3 bg-black/60 text-white p-1 rounded backdrop-blur-sm border border-white/10 opacity-70 hover:opacity-100 transition-opacity">
+                    <GripVertical className="w-3.5 h-3.5" />
+                  </span>
                 </div>
 
                 {/* Info */}