[enh] allow to limit to number of journals per categories

data/actionsmap/yunohost.yml

@@ -1600,3 +1600,8 @@ journals:
         list:
             action_help: List journals
             api: GET /journals
+            arguments:
+               -l:
+                    full: --limit
+                    help: Maximum number of journals per categories
+                    type: int

src/yunohost/journals.py

@@ -36,7 +36,7 @@ JOURNALS_PATH = '/var/log/journals/'
 logger = getActionLogger('yunohost.journals')
 
 
-def journals_list():
+def journals_list(limit=None):
     """
     List domains
 
@@ -66,6 +66,9 @@ def journals_list():
 
         result[category] = list(reversed(sorted(result[category], key=lambda x: x["started_at"])))
 
+        if limit is not None:
+            result[category] = result[category][:limit]
+
     return result