Cache API results for better testing

Signed-off-by: Markus Birth <markus@birth-online.de>

main.py

@@ -1,5 +1,7 @@
 import configparser
 import requests
+import os.path
+import pickle
 from collections.abc import Callable
 from atproto import Client, client_utils
 from rich import print
@@ -16,6 +18,11 @@ class BlueBackBlocker():
         return self.agent.app.bsky.graph.get_lists({'actor': self.did})
 
     def get_list(self, list_id: str, progress: Callable[[int, int], None] = None):
+        cachefile = f"bs_{list_id}.pickle"
+        if os.path.isfile(cachefile):
+            with open(cachefile, "rb") as f:
+                return pickle.load(f)
+
         list_uri = f"at://{self.did}/app.bsky.graph.list/{list_id}"
         cursor = None
         members = []
@@ -30,10 +37,15 @@ class BlueBackBlocker():
             if not r["cursor"]:
                 break
             cursor = r["cursor"]
-        return {
+        results = {
             "items": members,
             "list": r["list"]
         }
+        
+        with open(cachefile, "wb") as f:
+            pickle.dump(results, f)
+        
+        return results
 
     def add_to_list(self):
         pass