first commit

backend/utils/json_crud.py

@@ -0,0 +1,33 @@
+import json
+import os
+
+def load_json(filename):
+    if not os.path.exists(filename):
+        return []
+    with open(filename, 'r', encoding='utf-8') as f:
+        return json.load(f)
+
+def save_json(filename, data):
+    with open(filename, 'w', encoding='utf-8') as f:
+        json.dump(data, f, indent=4, ensure_ascii=False)
+
+def add_entry(filename, entry):
+    data = load_json(filename)
+    data.append(entry)
+    save_json(filename, data)
+    return entry
+
+def update_entry(filename, entry_id, new_entry):
+    data = load_json(filename)
+    for i, item in enumerate(data):
+        if item.get('id') == entry_id:
+            data[i] = new_entry
+            save_json(filename, data)
+            return new_entry
+    return None
+
+def delete_entry(filename, entry_id):
+    data = load_json(filename)
+    new_data = [item for item in data if item.get('id') != entry_id]
+    save_json(filename, new_data)
+    return len(data) != len(new_data)