--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/backend/plugins/plugin_comp_ap_gateway/constants.py	Fri Jun 02 11:49:51 2023 +0200
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+
+# Libervia ActivityPub Gateway
+# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+IMPORT_NAME = "ap-gateway"
+CONF_SECTION = f"component {IMPORT_NAME}"
+CONTENT_TYPE_AP = "application/activity+json; charset=utf-8"
+TYPE_ACTOR = "actor"
+TYPE_INBOX = "inbox"
+TYPE_SHARED_INBOX = "shared_inbox"
+TYPE_OUTBOX = "outbox"
+TYPE_FOLLOWERS = "followers"
+TYPE_FOLLOWING = "following"
+TYPE_ITEM = "item"
+TYPE_TOMBSTONE = "Tombstone"
+TYPE_MENTION = "Mention"
+TYPE_LIKE = "Like"
+TYPE_REACTION = "EmojiReact"
+TYPE_EVENT = "Event"
+TYPE_JOIN = "Join"
+TYPE_LEAVE = "Leave"
+MEDIA_TYPE_AP = "application/activity+json"
+NS_AP = "https://www.w3.org/ns/activitystreams"
+NS_AP_PUBLIC = f"{NS_AP}#Public"
+# 3 values can be used, see https://www.w3.org/TR/activitypub/#public-addressing
+PUBLIC_TUPLE = (NS_AP_PUBLIC, "as:Public", "Public")
+AP_REQUEST_TYPES = {
+    "GET": {TYPE_ACTOR, TYPE_OUTBOX, TYPE_FOLLOWERS, TYPE_FOLLOWING},
+    "POST": {"inbox"},
+}
+AP_REQUEST_TYPES["HEAD"] = AP_REQUEST_TYPES["GET"]
+# headers to check for signature
+SIGN_HEADERS = {
+    # headers needed for all HTTP methods
+    None: [
+        # tuples are equivalent headers/pseudo headers, one of them must be present
+        ("date", "(created)"),
+        ("digest", "(request-target)"),
+    ],
+    b"GET": ["host"],
+    b"POST": ["digest"]
+}
+PAGE_SIZE = 10
+HS2019 = "hs2019"
+# delay after which a signed request is not accepted anymore
+SIGN_EXP = 12*60*60  # 12 hours (same value as for Mastodon)
+
+LRU_MAX_SIZE = 200
+ACTIVITY_TYPES = (
+    "Accept", "Add", "Announce", "Arrive", "Block", "Create", "Delete", "Dislike", "Flag",
+    "Follow", "Ignore", "Invite", "Join", "Leave", "Like", "Listen", "Move", "Offer",
+    "Question", "Reject", "Read", "Remove", "TentativeReject", "TentativeAccept",
+    "Travel", "Undo", "Update", "View",
+    # non-standard activities
+    "EmojiReact"
+)
+ACTIVITY_TYPES_LOWER = [a.lower() for a in ACTIVITY_TYPES]
+ACTIVITY_OBJECT_MANDATORY = (
+    "Create", "Update", "Delete", "Follow", "Add", "Remove", "Like", "Block", "Undo"
+)
+ACTIVITY_TARGET_MANDATORY = ("Add", "Remove")
+# activities which can be used with Shared Inbox (i.e. with no account specified)
+# must be lowercase
+ACTIVIY_NO_ACCOUNT_ALLOWED = (
+    "create", "update", "delete", "announce", "undo", "like", "emojireact", "join",
+    "leave"
+)
+# maximum number of parents to retrieve when comments_max_depth option is set
+COMMENTS_MAX_PARENTS = 100
+# maximum size of avatar, in bytes
+MAX_AVATAR_SIZE = 1024 * 1024 * 5
+
+# storage prefixes
+ST_AVATAR = "[avatar]"
+ST_AP_CACHE = "[AP_item_cache]"