Initial commit: IT Nexus Web-App

backend/src/controllers/knowledge.controller.js

@@ -0,0 +1,55 @@
+const { getDatabase } = require('../config/database');
+
+const getAll = (req, res) => {
+    const db = getDatabase();
+    const entries = db.prepare(`
+        SELECT k.*, u.username as author_name
+        FROM ai_knowledge k
+        LEFT JOIN users u ON u.id = k.created_by
+        ORDER BY k.category ASC, k.updated_at DESC
+    `).all();
+    res.json(entries);
+};
+
+const getByCategory = (req, res) => {
+    const db = getDatabase();
+    const entries = db.prepare(`
+        SELECT k.*, u.username as author_name
+        FROM ai_knowledge k
+        LEFT JOIN users u ON u.id = k.created_by
+        WHERE k.category = ?
+        ORDER BY k.updated_at DESC
+    `).all(req.params.category);
+    res.json(entries);
+};
+
+const create = (req, res) => {
+    const { title, content, category, tags } = req.body;
+    if (!title?.trim() || !content?.trim()) return res.status(400).json({ error: 'Titel und Inhalt erforderlich' });
+    const db = getDatabase();
+    const result = db.prepare(`
+        INSERT INTO ai_knowledge (title, content, category, tags, created_by)
+        VALUES (?, ?, ?, ?, ?)
+    `).run(title.trim(), content.trim(), category || 'Allgemein', JSON.stringify(tags || []), req.user?.id || null);
+    res.status(201).json(db.prepare('SELECT * FROM ai_knowledge WHERE id=?').get(result.lastInsertRowid));
+};
+
+const update = (req, res) => {
+    const db = getDatabase();
+    const existing = db.prepare('SELECT * FROM ai_knowledge WHERE id=?').get(req.params.id);
+    if (!existing) return res.status(404).json({ error: 'Nicht gefunden' });
+    const { title, content, category, tags } = req.body;
+    db.prepare(`UPDATE ai_knowledge SET title=?, content=?, category=?, tags=?, updated_at=CURRENT_TIMESTAMP WHERE id=?`)
+        .run(title ?? existing.title, content ?? existing.content, category ?? existing.category,
+            tags !== undefined ? JSON.stringify(tags) : existing.tags, req.params.id);
+    res.json(db.prepare('SELECT * FROM ai_knowledge WHERE id=?').get(req.params.id));
+};
+
+const remove = (req, res) => {
+    const db = getDatabase();
+    if (!db.prepare('SELECT id FROM ai_knowledge WHERE id=?').get(req.params.id)) return res.status(404).json({ error: 'Nicht gefunden' });
+    db.prepare('DELETE FROM ai_knowledge WHERE id=?').run(req.params.id);
+    res.json({ success: true });
+};
+
+module.exports = { getAll, getByCategory, create, update, remove };