feat: add functionality for linking teachers to classes with a new UI tab and API endpoint

backend/routes/api.py

@@ -459,6 +459,29 @@ def set_my_classes():
     return jsonify({'my_classes': [{'id': c.id, 'name': c.name} for c in current_user.classes]})
 
 
+
+# ── Klas-leerkracht koppeling (directeur) ──────────────────────────────────────
+
+@api_bp.route('/classes/<int:class_id>/teachers', methods=['PUT'])
+@login_required
+@director_required
+def set_class_teachers(class_id):
+    """Directeur koppelt leerkrachten aan een klas."""
+    klas = Class.query.filter_by(id=class_id, school_id=current_user.school_id).first_or_404()
+    data     = request.get_json() or {}
+    user_ids = data.get('teacher_ids', [])
+    teachers = User.query.filter(
+        User.id.in_(user_ids),
+        User.school_id == current_user.school_id,
+        User.is_active == True,
+    ).all()
+    klas.users = teachers
+    audit_log('class.user_assignment', 'class', target_id=str(class_id),
+              detail={'class_name': klas.name, 'teacher_ids': user_ids,
+                      'teacher_names': [t.full_name for t in teachers]})
+    db.session.commit()
+    return jsonify({'teachers': [{'id': t.id, 'full_name': t.full_name} for t in teachers]})
+
 # ── Auditlog ───────────────────────────────────────────────────────────────────
 
 @api_bp.route('/audit-log')

backend/templates/directeur.html

@@ -148,6 +148,7 @@
         <button class="tab-btn" data-tab="vakken">📚 Per vak</button>
         <button class="tab-btn" data-tab="doelen">📋 Doelen detail</button>
         <button class="tab-btn" data-tab="vergelijk">⚖️ Vergelijken</button>
+        <button class="tab-btn" data-tab="koppeling">👥 Leerkrachten</button>
     </div>
 
     <div class="tab-content active" id="tab-klassen">
@@ -191,6 +192,10 @@
                 <label>Leeftijd</label>
                 <div class="leeftijd-cbs" id="leeftijdCbs"></div>
             </div>
+            <div class="fg">
+                <label>Sectie</label>
+                <select id="filterSectie"><option value="all">Alle secties</option></select>
+            </div>
             <div class="fg">
                 <label>Zoeken</label>
                 <input type="text" id="filterSearch" placeholder="Code of beschrijving...">
@@ -234,6 +239,30 @@
         </div>
     </div>
 
+    <!-- TAB: Leerkrachten koppelen -->
+    <div class="tab-content" id="tab-koppeling">
+        <div class="card">
+            <h2>👥 Leerkrachten aan klassen koppelen</h2>
+            <p style="font-size:.85rem;color:var(--gray-500);margin-bottom:1rem;">
+                Klik op een klas om de gekoppelde leerkrachten te wijzigen.
+            </p>
+            <div id="koppelingContent"><div class="empty">Laden...</div></div>
+        </div>
+    </div>
+
+    <!-- Modal: leerkrachten koppelen -->
+    <div id="koppelingModal" style="display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:1000;align-items:center;justify-content:center;">
+        <div style="background:white;border-radius:12px;padding:1.5rem;max-width:420px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,.3);">
+            <h2 style="font-size:1.1rem;margin-bottom:.5rem;" id="koppelingModalTitle">Leerkrachten koppelen</h2>
+            <p style="font-size:.82rem;color:var(--gray-500);margin-bottom:1rem;">Selecteer de leerkrachten voor deze klas.</p>
+            <div id="koppelingCheckboxes" style="display:flex;flex-direction:column;gap:.4rem;max-height:280px;overflow-y:auto;margin-bottom:1rem;"></div>
+            <div style="display:flex;gap:.5rem;justify-content:flex-end;">
+                <button id="btnKoppelingAnnuleer" class="btn btn-secondary">Annuleren</button>
+                <button id="btnKoppelingOpslaan" class="btn btn-primary">Opslaan</button>
+            </div>
+        </div>
+    </div>
+
 </div>
 
 <div class="notification" id="notification"></div>
@@ -276,9 +305,14 @@ document.addEventListener('DOMContentLoaded', async () => {
     document.getElementById('filterKlas').addEventListener('change', applyFilters);
     document.getElementById('filterStatus').addEventListener('change', applyFilters);
     document.getElementById('filterSearch').addEventListener('input', applyFilters);
+    document.getElementById('filterSectie').addEventListener('change', applyFilters);
 
     // Export knoppen
     document.getElementById('btnExportCSV').addEventListener('click', exportCSV);
+    document.getElementById('btnKoppelingAnnuleer').addEventListener('click', () => {
+        document.getElementById('koppelingModal').style.display = 'none';
+    });
+    document.getElementById('btnKoppelingOpslaan').addEventListener('click', saveKoppeling);
     document.getElementById('btnExportPDF').addEventListener('click', exportPDF);
 
     // Vergelijk selects
@@ -331,6 +365,7 @@ async function loadOverview() {
     updateStats();
     renderKlassen();
     renderKlasProgress();
+    renderKoppelingTab();
     renderVakStats();
     populateFilters();
     applyFilters();
@@ -498,6 +533,16 @@ function populateFilters() {
     });
 }
 
+function populateSectieFilter(vakId) {
+    const sel = document.getElementById('filterSectie');
+    sel.innerHTML = '<option value="all">Alle secties</option>';
+    if (!vakId || vakId === 'all' || !allGoals[vakId]) return;
+    const secties = [...new Set(allGoals[vakId].map(g => g.sectie).filter(Boolean))].sort();
+    secties.forEach(s => {
+        const o = document.createElement('option'); o.value = s; o.textContent = s; sel.appendChild(o);
+    });
+}
+
 function applyFilters() {
     const vakFilter    = document.getElementById('filterVak').value;
     const klasFilter   = document.getElementById('filterKlas').value;
@@ -505,6 +550,11 @@ function applyFilters() {
     const leeftFilter  = [...document.querySelectorAll('#leeftijdCbs input:checked')].map(c=>c.value);
     const search       = document.getElementById('filterSearch').value.toLowerCase();
 
+    const sectieFilter = document.getElementById('filterSectie').value;
+
+    // Sectie filter opties bijwerken als vak wijzigt
+    populateSectieFilter(vakFilter);
+
     const vakkenToShow = vakFilter === 'all' ? Object.keys(allGoals) : [vakFilter];
     const klassen      = klasFilter === 'all'
         ? (overviewData.classes||[])
@@ -515,6 +565,7 @@ function applyFilters() {
         (allGoals[vakId]||[]).forEach(goal => {
             if (search && !(goal.goNr+' '+goal.inhoud).toLowerCase().includes(search)) return;
             if (leeftFilter.length > 0 && !leeftFilter.some(l=>goal.leeftijden.includes(l))) return;
+            if (sectieFilter !== 'all' && goal.sectie !== sectieFilter) return;
             const statussen = klassen.map(k => (overviewData.assessments_by_class[k.id]?.[vakId]?.[goal.id])||'');
             if (statusFilter==='consensus' && !statussen.every(s=>s==='groen')) return;
             if (statusFilter==='verschil') {
@@ -662,6 +713,71 @@ function exportPDF() {
     showNotification('PDF geëxporteerd', 'success');
 }
 
+// ── Koppeling tab ─────────────────────────────────────────────────────────────
+let allUsers        = [];
+let activeKlasKoppeling = null;
+
+async function renderKoppelingTab() {
+    const el      = document.getElementById('koppelingContent');
+    const klassen = overviewData.classes || [];
+    if (!klassen.length) { el.innerHTML = '<div class="empty">Geen klassen gevonden</div>'; return; }
+
+    // Laad alle leerkrachten van de school
+    try {
+        const res = await fetch('/api/users');
+        if (res.ok) { const d = await res.json(); allUsers = d.users || []; }
+    } catch(e) { console.warn('Kon gebruikers niet laden'); }
+
+    el.innerHTML = '<div class="vak-grid">' + klassen.map(k => {
+        const teachers = (k.teachers||[]).map(t => t.full_name).join(', ') || '<em style="color:var(--gray-400)">Geen leerkrachten</em>';
+        return `<div class="vak-card" style="cursor:pointer;" data-action="openKoppeling" data-id="${k.id}" data-name="${k.name.replace(/"/g,'&quot;')}" data-teachers="${JSON.stringify((k.teachers||[]).map(t=>t.id)).replace(/"/g,'&quot;')}">
+            <div class="vak-card-header">
+                <h3>🏫 ${k.name}</h3>
+                <span style="font-size:.75rem;background:var(--primary);color:white;padding:.2rem .5rem;border-radius:4px;">Wijzigen</span>
+            </div>
+            <div style="font-size:.82rem;color:var(--gray-600);">${teachers}</div>
+        </div>`;
+    }).join('') + '</div>';
+}
+
+document.addEventListener('click', function(e) {
+    const card = e.target.closest('[data-action="openKoppeling"]');
+    if (!card) return;
+    activeKlasKoppeling = parseInt(card.dataset.id);
+    const name     = card.dataset.name;
+    const teachers = JSON.parse(card.dataset.teachers.replace(/&quot;/g, '"'));
+
+    document.getElementById('koppelingModalTitle').textContent = `Leerkrachten voor ${name}`;
+
+    const container = document.getElementById('koppelingCheckboxes');
+    if (!allUsers.length) {
+        container.innerHTML = '<em style="color:var(--gray-400)">Geen leerkrachten beschikbaar. Voeg eerst leerkrachten toe via Gebruikersbeheer.</em>';
+    } else {
+        container.innerHTML = allUsers.map(u => `
+            <label style="display:flex;align-items:center;gap:.5rem;cursor:pointer;padding:.35rem;border-radius:4px;">
+                <input type="checkbox" value="${u.id}" ${teachers.includes(u.id)?'checked':''}>
+                <span>${u.full_name} <span style="color:var(--gray-400);font-size:.8rem;">(${u.email})</span></span>
+            </label>`).join('');
+    }
+    document.getElementById('koppelingModal').style.display = 'flex';
+});
+
+async function saveKoppeling() {
+    if (!activeKlasKoppeling) return;
+    const checked = [...document.querySelectorAll('#koppelingCheckboxes input:checked')].map(i => parseInt(i.value));
+
+    // Gebruik de admin route om leerkrachten aan klas te koppelen
+    const res = await fetch(`/api/classes/${activeKlasKoppeling}/teachers`, {
+        method: 'PUT',
+        headers: {'Content-Type': 'application/json'},
+        body: JSON.stringify({ teacher_ids: checked })
+    });
+    if (!res.ok) { showNotification('Opslaan mislukt', 'error'); return; }
+    document.getElementById('koppelingModal').style.display = 'none';
+    showNotification('Koppeling opgeslagen', 'success');
+    await loadOverview();  // herlaad zodat klas-chips bijgewerkt worden
+}
+
 // ── Tabs ───────────────────────────────────────────────────────────────────────
 function switchTab(name) {
     document.querySelectorAll('.tab-btn').forEach(b => b.classList.toggle('active', b.dataset.tab===name));