DingTalk was the only messaging platform without group-mention gating or a
per-user allowlist. Slack, Telegram, Discord, WhatsApp, Matrix, and Mattermost
all support these via config.yaml + matching env vars; this change closes the
gap for DingTalk using the same surface:
Config:
platforms.dingtalk.require_mention: bool (env: DINGTALK_REQUIRE_MENTION)
platforms.dingtalk.mention_patterns: list (env: DINGTALK_MENTION_PATTERNS)
platforms.dingtalk.free_response_chats: list (env: DINGTALK_FREE_RESPONSE_CHATS)
platforms.dingtalk.allowed_users: list (env: DINGTALK_ALLOWED_USERS)
Semantics mirror Telegram's implementation:
- DMs are always accepted (subject to allowed_users).
- Group messages are accepted only when the chat is allowlisted, mention is
not required, the bot was @mentioned (dingtalk_stream sets is_in_at_list),
or the text matches a configured regex wake-word.
- allowed_users matches sender_id / sender_staff_id case-insensitively;
a single "*" disables the check.
Rationale: without this, any DingTalk user in a group chat can trigger the
bot, which makes DingTalk less safe to deploy than the other platforms. A
user's config.yaml already accepts require_mention for dingtalk but the value
was silently ignored.
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