From 73f8792b757236935f5a6cffe7a649b2e08313bf Mon Sep 17 00:00:00 2001
From: Andrew Ferrazzutti <fair@miscworks.net>
Date: Mon, 11 Apr 2022 23:45:00 -0400
Subject: [PATCH] Set history & join rules to match KakaoTalk behaviour

---
 .../kt/types/channel/channel_type.py                |  4 ++++
 matrix_appservice_kakaotalk/portal.py               | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/matrix_appservice_kakaotalk/kt/types/channel/channel_type.py b/matrix_appservice_kakaotalk/kt/types/channel/channel_type.py
index 634c702..10b0424 100644
--- a/matrix_appservice_kakaotalk/kt/types/channel/channel_type.py
+++ b/matrix_appservice_kakaotalk/kt/types/channel/channel_type.py
@@ -30,6 +30,10 @@ class KnownChannelType(str, Enum):
     def is_direct(cls, value: Union["KnownChannelType", str]) -> bool:
         return value in [cls.DirectChat, cls.MemoChat]
 
+    @classmethod
+    def is_open(cls, value: Union["KnownChannelType", str]) -> bool:
+        return value in [cls.OM, cls.OD]
+
 
 ChannelType = Union[KnownChannelType, str] # Substitute for ChannelType = "name1" | ... | "nameN" | str
 
diff --git a/matrix_appservice_kakaotalk/portal.py b/matrix_appservice_kakaotalk/portal.py
index 77b12cd..f8f34a0 100644
--- a/matrix_appservice_kakaotalk/portal.py
+++ b/matrix_appservice_kakaotalk/portal.py
@@ -40,6 +40,8 @@ from mautrix.types import (
     EventType,
     FileInfo,
     ImageInfo,
+    JoinRule,
+    JoinRulesStateEventContent,
     LocationMessageEventContent,
     MediaInfo,
     MediaMessageEventContent,
@@ -630,6 +632,17 @@ class Portal(DBPortal, BasePortal):
                 "content": self.bridge_info,
             },
         ]
+        if KnownChannelType.is_open(info.channel_info.type):
+            initial_state.extend((
+                {
+                    "type": str(EventType.ROOM_JOIN_RULES),
+                    "content": JoinRulesStateEventContent(join_rule=JoinRule.PUBLIC).serialize(),
+                },
+                {
+                    "type": "m.room.guest_access",
+                    "content": {"guest_access": "forbidden"},
+                },
+            ))
         invites = []
         if self.config["bridge.encryption.default"] and self.matrix.e2ee:
             self.encrypted = True