Add the handler to show items.

src/handlers/__init__.py

@@ -4,6 +4,7 @@ import simplematrixbotlib as botlib
 from src.handlers.help import help_handler
 from src.handlers.city import city_list_handler, select_city_handler
 from src.handlers.company import company_list_handler, select_company_handler
+from src.handlers.category import category_list_handler
 from src.handlers.user import register_handler
 
 from src.fmt.city_formatter import CityFormatter
@@ -46,3 +47,6 @@ def setup(bot: botlib.Bot, prefix: str):
             company_name = formatter.get_name_from_parts(match.args())
             await select_company_handler(bot=bot, room_id=room.room_id, sender=message.sender, admin_id=bot.config.admin_id, company_name=company_name)
 
+        if match.command('category-list'):
+            await category_list_handler(bot=bot, room_id=room.room_id, sender=message.sender, admin_id=bot.config.admin_id)
+

src/handlers/category.py

@@ -0,0 +1,23 @@
+import simplematrixbotlib as botlib
+import aiohttp
+import asyncio
+import ujson
+from src.config.dots_bot_api_config import DotsBotApiConfig
+
+from src.api.v2.category_api import CategoryAPI
+from src.fetcher.v2.api_fetcher import ApiFetcher
+from src.fmt.category_formatter import CategoryFormatter
+
+dots_bot_api_config = DotsBotApiConfig()
+
+async def category_list_handler(room_id: str, bot: botlib.Bot, sender: str, admin_id: str):
+
+    session = aiohttp.ClientSession(json_serialize=ujson.dumps)
+    apiFetcher = ApiFetcher(dots_bot_api_config.get_base_url(), session)
+    formatter = CategoryFormatter()
+    categoryAPI = CategoryAPI(apiFetcher, formatter)
+
+    msg: str = await categoryAPI.get_objects_message(sender)
+
+    await bot.api.send_markdown_message(room_id=room_id, message=msg)
+