def getFullCatalog():
catalog = []
c = CatalogModel()
categories = c.getCategories()
for category in categories:
category['topics'] = []
topics = c.getTopicsByCategory(category['id'])
for topic in topics:
layers = c.getLayersByTopic(topic['id'])
topic['layers'] = layers
category['topics'].append(topic)
catalog.append(category)
result = {'result': catalog}
return jsonify(result)
