Implementierung Wissensmanagement

backend/database.js

@@ -409,6 +409,54 @@ function createTables() {
     )
   `);
 
+  // Wissensmanagement - Kategorien
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS knowledge_categories (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      name TEXT NOT NULL,
+      description TEXT,
+      color TEXT DEFAULT '#3B82F6',
+      icon TEXT,
+      position INTEGER NOT NULL DEFAULT 0,
+      created_by INTEGER,
+      created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+      FOREIGN KEY (created_by) REFERENCES users(id)
+    )
+  `);
+
+  // Wissensmanagement - Einträge
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS knowledge_entries (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      category_id INTEGER NOT NULL,
+      title TEXT NOT NULL,
+      url TEXT,
+      notes TEXT,
+      position INTEGER NOT NULL DEFAULT 0,
+      created_by INTEGER,
+      created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+      updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+      FOREIGN KEY (category_id) REFERENCES knowledge_categories(id) ON DELETE CASCADE,
+      FOREIGN KEY (created_by) REFERENCES users(id)
+    )
+  `);
+
+  // Wissensmanagement - Anhänge
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS knowledge_attachments (
+      id INTEGER PRIMARY KEY AUTOINCREMENT,
+      entry_id INTEGER NOT NULL,
+      filename TEXT NOT NULL,
+      original_name TEXT NOT NULL,
+      mime_type TEXT NOT NULL,
+      size_bytes INTEGER NOT NULL,
+      uploaded_by INTEGER,
+      uploaded_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+      FOREIGN KEY (entry_id) REFERENCES knowledge_entries(id) ON DELETE CASCADE,
+      FOREIGN KEY (uploaded_by) REFERENCES users(id)
+    )
+  `);
+
   // Indizes für Performance
   db.exec(`
     CREATE INDEX IF NOT EXISTS idx_tasks_project ON tasks(project_id);
@@ -426,6 +474,8 @@ function createTables() {
     CREATE INDEX IF NOT EXISTS idx_notifications_user_read ON notifications(user_id, is_read);
     CREATE INDEX IF NOT EXISTS idx_notifications_created ON notifications(created_at);
     CREATE INDEX IF NOT EXISTS idx_applications_project ON applications(project_id);
+    CREATE INDEX IF NOT EXISTS idx_knowledge_entries_category ON knowledge_entries(category_id);
+    CREATE INDEX IF NOT EXISTS idx_knowledge_attachments_entry ON knowledge_attachments(entry_id);
   `);
 
   logger.info('Datenbank-Tabellen erstellt');