feat: implement lesson creation directly on the schedule calendar via a new API endpoint and database updates.

src/app/api/lessons/route.ts

@@ -0,0 +1,65 @@
+import { prisma } from "@/infrastructure/db/prisma";
+import { NextResponse } from "next/server";
+
+export async function GET() {
+    try {
+        const lessons = await prisma.lesson.findMany({
+            include: {
+                instructor: true,
+                branch: true,
+                class: true,
+            },
+        });
+        return NextResponse.json(lessons);
+    } catch (error) {
+        return NextResponse.json({ error: "Dersler yüklenemedi" }, { status: 500 });
+    }
+}
+
+export async function POST(request: Request) {
+    try {
+        const json = await request.json();
+        const { startTime, endTime, instructorId, branchId, classId, type, hallNumber, occurrenceCount = 1, period = 'NONE' } = json;
+
+        const start = new Date(startTime);
+        const end = new Date(endTime);
+        const lessons = [];
+
+        for (let i = 0; i < occurrenceCount; i++) {
+            const currentStart = new Date(start);
+            const currentEnd = new Date(end);
+
+            if (period === 'DAILY') {
+                currentStart.setDate(start.getDate() + i);
+                currentEnd.setDate(end.getDate() + i);
+            } else if (period === 'WEEKLY') {
+                currentStart.setDate(start.getDate() + (i * 7));
+                currentEnd.setDate(end.getDate() + (i * 7));
+            } else if (period === 'MONTHLY') {
+                currentStart.setMonth(start.getMonth() + i);
+                currentEnd.setMonth(end.getMonth() + i);
+            } else if (period === 'SIX_MONTHLY') {
+                currentStart.setMonth(start.getMonth() + (i * 6));
+                currentEnd.setMonth(end.getMonth() + (i * 6));
+            }
+
+            const lesson = await prisma.lesson.create({
+                data: {
+                    startTime: currentStart,
+                    endTime: currentEnd,
+                    type,
+                    hallNumber: parseInt(hallNumber),
+                    branchId,
+                    instructorId,
+                    classId: classId || null,
+                }
+            });
+            lessons.push(lesson);
+        }
+
+        return NextResponse.json({ message: `${lessons.length} ders başarıyla oluşturuldu`, lessons });
+    } catch (error: any) {
+        console.error('Lesson creation error:', error);
+        return NextResponse.json({ error: "Ders oluşturulamadı", details: error.message }, { status: 500 });
+    }
+}

src/app/page.tsx

@@ -46,7 +46,7 @@ export default async function Home() {
 
       <main className={styles.main}>
 
-        <ScheduleCalendar lessons={lessons} hallCount={hallCount} />
+        <ScheduleCalendar lessons={lessons} hallCount={hallCount} branchId={branch?.id} />
       </main>
 
       <footer className={styles.footer}>

src/components/ScheduleCalendar.tsx

@@ -1,5 +1,6 @@
 'use client';
 import { useMemo, useEffect, useRef, useState } from 'react';
+import { useRouter } from 'next/navigation';
 
 interface Lesson {
     id: string;
@@ -13,13 +14,28 @@ interface Lesson {
     hallNumber?: number | null;
 }
 
-export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[], hallCount?: number }) {
+export function ScheduleCalendar({ lessons, hallCount = 1, branchId }: { lessons: Lesson[], hallCount?: number, branchId?: string }) {
+    const router = useRouter();
     const days = ['Pazartesi', 'Salı', 'Çarşamba', 'Perşembe', 'Cuma', 'Cumartesi', 'Pazar'];
     const hours = Array.from({ length: 24 }, (_, i) => i);
 
     const scrollRef = useRef<HTMLDivElement>(null);
     const [now, setNow] = useState(new Date());
 
+    // Modal State
+    const [isModalOpen, setIsModalOpen] = useState(false);
+    const [selectedSlot, setSelectedSlot] = useState<{ dayIdx: number, hour: number, hNum: number } | null>(null);
+    const [instructors, setInstructors] = useState<any[]>([]);
+    const [classes, setClasses] = useState<any[]>([]);
+    const [formData, setFormData] = useState({
+        instructorId: '',
+        classId: '',
+        type: 'Group',
+        period: 'NONE',
+        occurrenceCount: 1,
+        duration: 60
+    });
+
     useEffect(() => {
         const timer = setInterval(() => setNow(new Date()), 60000);
         if (scrollRef.current) {
@@ -30,6 +46,66 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
         return () => clearInterval(timer);
     }, []);
 
+    const fetchFormData = async () => {
+        const [instRes, classRes] = await Promise.all([
+            fetch('/api/instructors'),
+            fetch('/api/classes')
+        ]);
+        const instData = await instRes.json();
+        const classData = await classRes.json();
+        setInstructors(instData);
+        setClasses(classData);
+    };
+
+    const handleSlotClick = (dayIdx: number, hour: number, hNum: number) => {
+        if (!branchId) return;
+        setSelectedSlot({ dayIdx, hour, hNum });
+        setIsModalOpen(true);
+        fetchFormData();
+    };
+
+    const handleSubmit = async (e: React.FormEvent) => {
+        e.preventDefault();
+        if (!selectedSlot || !branchId) return;
+
+        // Calculate actual date for the selected slot in the current week
+        const now = new Date();
+        const dayOfWeek = now.getDay();
+        const diff = now.getDate() - dayOfWeek + (dayOfWeek === 0 ? -6 : 1);
+        const startOfWeek = new Date(now.setDate(diff));
+
+        const startTime = new Date(startOfWeek);
+        startTime.setDate(startOfWeek.getDate() + selectedSlot.dayIdx);
+        startTime.setHours(selectedSlot.hour, 0, 0, 0);
+
+        const endTime = new Date(startTime);
+        endTime.setMinutes(startTime.getMinutes() + parseInt(formData.duration.toString()));
+
+        try {
+            const res = await fetch('/api/lessons', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({
+                    ...formData,
+                    branchId,
+                    hallNumber: selectedSlot.hNum,
+                    startTime,
+                    endTime
+                })
+            });
+
+            if (res.ok) {
+                setIsModalOpen(false);
+                router.refresh();
+            } else {
+                const errData = await res.json();
+                alert(`Ders oluşturulamadı: ${errData.details || errData.error || 'Bilinmeyen hata'}`);
+            }
+        } catch (error) {
+            console.error(error);
+        }
+    };
+
     const nowTop = (now.getHours() * 60) + now.getMinutes();
 
     const groupedLessons = useMemo(() => {
@@ -54,10 +130,8 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
         return groups;
     }, [lessons]);
 
-    // Dimensions
     const timeWidth = 60;
-    const dayMinWidth = 150;
+    const dayMinWidth = 180;
-    const hallMinWidth = dayMinWidth / hallCount;
 
     return (
         <div style={{
@@ -71,11 +145,10 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
             fontFamily: 'sans-serif'
         }}>
             <h1 style={{ textAlign: 'center', padding: '10px', margin: 0, fontSize: '1.2rem', borderBottom: '1px solid #333' }}>
-                Haftalık Ders Programı (Rebuilt)
+                Haftalık Ders Programı
             </h1>
 
             <div ref={scrollRef} style={{ flex: 1, overflow: 'auto', position: 'relative' }}>
-                {/* Header (Sticky) */}
                 <div style={{ position: 'sticky', top: 0, zIndex: 100, backgroundColor: '#000', borderBottom: '1px solid #333' }}>
                     <div style={{ display: 'flex', marginLeft: timeWidth }}>
                         {days.map((day, idx) => {
@@ -106,8 +179,9 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
                                             textAlign: 'center',
                                             fontSize: '0.6rem',
                                             color: '#666',
-                                            borderRight: '1px solid #222',
+                                            borderRight: hIdx === hallCount - 1 ? '1px solid #333' : '1px solid #222',
-                                            padding: '2px 0'
+                                            padding: '4px 0',
+                                            backgroundColor: '#050505'
                                         }}>
                                             S{hIdx + 1}
                                         </div>
@@ -118,9 +192,7 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
                     )}
                 </div>
 
-                {/* Grid Body */}
                 <div style={{ display: 'flex', minHeight: '1440px', position: 'relative' }}>
-                    {/* Time Axis */}
                     <div style={{ width: timeWidth, position: 'sticky', left: 0, zIndex: 50, backgroundColor: '#000', borderRight: '1px solid #333' }}>
                         {hours.map(h => (
                             <div key={h} style={{ height: '60px', paddingRight: '5px', textAlign: 'right', fontSize: '0.7rem', color: '#666', paddingTop: '2px' }}>
@@ -129,9 +201,7 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
                         ))}
                     </div>
 
-                    {/* Main Content Area */}
                     <div style={{ flex: 1, position: 'relative', display: 'flex', backgroundImage: 'linear-gradient(#222 1px, transparent 1px)', backgroundSize: '100% 60px' }}>
-                        {/* Now Line */}
                         <div style={{ position: 'absolute', top: nowTop, left: 0, right: 0, height: '2px', backgroundColor: 'red', zIndex: 40, pointerEvents: 'none' }}>
                             <div style={{ position: 'absolute', left: '-5px', top: '-4px', width: '10px', height: '10px', borderRadius: '50%', backgroundColor: 'red' }} />
                         </div>
@@ -142,6 +212,30 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
                                     const hNum = hIdx + 1;
                                     return (
                                         <div key={hIdx} style={{ flex: 1, position: 'relative', borderRight: hallCount > 1 ? '1px solid #111' : 'none' }}>
+                                            {/* Hoverable Slots */}
+                                            {hours.map(h => (
+                                                <div
+                                                    key={h}
+                                                    onClick={() => handleSlotClick(dIdx, h, hNum)}
+                                                    style={{ height: '60px', position: 'relative', cursor: 'pointer' }}
+                                                    className="slot-hover"
+                                                >
+                                                    <div className="plus-btn" style={{
+                                                        position: 'absolute',
+                                                        right: '5px',
+                                                        top: '5px',
+                                                        width: '20px',
+                                                        height: '20px',
+                                                        backgroundColor: 'rgba(255,255,255,0.1)',
+                                                        borderRadius: '50%',
+                                                        display: 'none',
+                                                        alignItems: 'center',
+                                                        justifyContent: 'center',
+                                                        fontSize: '12px'
+                                                    }}>+</div>
+                                                </div>
+                                            ))}
+
                                             {groupedLessons[dIdx]?.[hNum]?.map(lesson => (
                                                 <div key={lesson.id} style={{
                                                     position: 'absolute',
@@ -149,13 +243,13 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
                                                     height: lesson.height,
                                                     left: '2px',
                                                     right: '2px',
-                                                    backgroundColor: lesson.type === 'Individual' ? 'rgba(255,0,0,0.1)' : 'rgba(0,120,255,0.1)',
+                                                    backgroundColor: lesson.type === 'Individual' ? 'rgba(242, 139, 130, 0.2)' : 'rgba(138, 180, 248, 0.2)',
-                                                    borderLeft: `3px solid ${lesson.type === 'Individual' ? 'red' : '#0070ff'}`,
+                                                    borderLeft: `3px solid ${lesson.type === 'Individual' ? '#f28b82' : '#8ab4f8'}`,
                                                     borderRadius: '4px',
                                                     padding: '4px',
                                                     fontSize: '0.7rem',
                                                     overflow: 'hidden',
-                                                    zIndex: 1
+                                                    zIndex: 10
                                                 }}>
                                                     <div style={{ fontWeight: 'bold', fontSize: '0.6rem', opacity: 0.8 }}>{lesson.startTimeStr}</div>
                                                     <div style={{ fontWeight: 'bold', margin: '2px 0' }}>{lesson.class?.name || lesson.name}</div>
@@ -170,6 +264,117 @@ export function ScheduleCalendar({ lessons, hallCount = 1 }: { lessons: Lesson[]
                     </div>
                 </div>
             </div>
+
+            {/* Reservation Modal */}
+            {isModalOpen && (
+                <div style={{
+                    position: 'fixed',
+                    top: 0, left: 0, right: 0, bottom: 0,
+                    backgroundColor: 'rgba(0,0,0,0.8)',
+                    display: 'flex',
+                    alignItems: 'center',
+                    justifyContent: 'center',
+                    zIndex: 200
+                }}>
+                    <form onSubmit={handleSubmit} style={{
+                        backgroundColor: '#1e1e1e',
+                        padding: '2rem',
+                        borderRadius: '8px',
+                        width: '400px',
+                        border: '1px solid #333',
+                        display: 'flex',
+                        flexDirection: 'column',
+                        gap: '1rem'
+                    }}>
+                        <h3>Yeni Ders Rezervasyonu</h3>
+                        <p style={{ fontSize: '0.8rem', color: '#9aa0a6' }}>
+                            {days[selectedSlot!.dayIdx]} - Saat: {selectedSlot!.hour}:00 - Salon: {selectedSlot!.hNum}
+                        </p>
+
+                        <label>Eğitmen</label>
+                        <select
+                            required
+                            value={formData.instructorId}
+                            onChange={(e) => setFormData({ ...formData, instructorId: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="">Seçiniz</option>
+                            {instructors.map(i => <option key={i.id} value={i.id}>{i.name}</option>)}
+                        </select>
+
+                        <label>Sınıf (Opsiyonel)</label>
+                        <select
+                            value={formData.classId}
+                            onChange={(e) => setFormData({ ...formData, classId: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="">Seçiniz</option>
+                            {classes.map(c => <option key={c.id} value={c.id}>{c.name}</option>)}
+                        </select>
+
+                        <label>Ders Türü</label>
+                        <select
+                            value={formData.type}
+                            onChange={(e) => setFormData({ ...formData, type: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="Group">Grup Dersi</option>
+                            <option value="Individual">Özel Ders</option>
+                        </select>
+
+                        <label>Süre (Dakika)</label>
+                        <input
+                            type="number"
+                            value={formData.duration}
+                            onChange={(e) => setFormData({ ...formData, duration: parseInt(e.target.value) })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        />
+
+                        <label>Tekrar</label>
+                        <select
+                            value={formData.period}
+                            onChange={(e) => setFormData({ ...formData, period: e.target.value })}
+                            style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                        >
+                            <option value="NONE">Tek Seferlik</option>
+                            <option value="DAILY">Günlük</option>
+                            <option value="WEEKLY">Haftalık</option>
+                            <option value="MONTHLY">Aylık</option>
+                            <option value="SIX_MONTHLY">6 Aylık</option>
+                        </select>
+
+                        {formData.period !== 'NONE' && (
+                            <>
+                                <label>Tekrar Sayısı</label>
+                                <input
+                                    type="number"
+                                    value={formData.occurrenceCount}
+                                    onChange={(e) => setFormData({ ...formData, occurrenceCount: parseInt(e.target.value) })}
+                                    style={{ padding: '8px', backgroundColor: '#2b2b2b', color: '#fff', border: '1px solid #444' }}
+                                />
+                            </>
+                        )}
+
+                        <div style={{ display: 'flex', gap: '10px', marginTop: '10px' }}>
+                            <button type="submit" style={{ flex: 1, padding: '10px', backgroundColor: '#8ab4f8', color: '#000', border: 'none', borderRadius: '4px', fontWeight: 'bold', cursor: 'pointer' }}>
+                                Kaydet
+                            </button>
+                            <button type="button" onClick={() => setIsModalOpen(false)} style={{ flex: 1, padding: '10px', backgroundColor: 'transparent', color: '#fff', border: '1px solid #444', borderRadius: '4px', cursor: 'pointer' }}>
+                                İptal
+                            </button>
+                        </div>
+                    </form>
+                </div>
+            )}
+
+            <style jsx>{`
+                .slot-hover:hover .plus-btn {
+                    display: flex !important;
+                }
+                .slot-hover:hover {
+                    background-color: rgba(255,255,255,0.05);
+                }
+            `}</style>
         </div>
     );
 }

src/presentation/components/Sidebar.tsx

@@ -8,12 +8,11 @@ export function Sidebar() {
     const router = useRouter();
 
     const navItems = [
+        { name: 'Takvime Git 🗓️', href: '/' },
         { name: 'Dashboard', href: '/admin/dashboard' },
         { name: 'Şubeler', href: '/admin/branches' },
         { name: 'Hocalar', href: '/admin/instructors' },
         { name: 'Sınıflar', href: '/admin/classes' },
-        { name: 'Ders Programı', href: '/admin/lessons' },
-        { name: 'Ücretler', href: '/admin/fees' },
         { name: 'Kayıt', href: '/admin/register' },
     ];