The LINE adapter passed text through as a single Plain component,
ignoring the mention payload (mentions[].index/length/isSelf) that the
Line Messaging API includes in the webhook. As a result:
- At(target=bot_account_id) never appeared in the message chain, so the
'at-bot' group respond rule silently dropped every @bot mention.
- The bot only replied when the message happened to match the prefix
rule (e.g. starting with 'ai').
Now LINEMessageConverter reads message.message.mention and builds the
chain per mention position:
- Bot mention (isSelf) -> At(target=bot_account_id) so AtBotRule matches
the same way as other adapters (dingtalk/lark etc.).
- Other mentions -> At(target=<line user id>, display=<mention text>).
At.__str__ already prepends '@', so the display text carries no
double '@' and the rendered text (prefix/regexp rules, quotes,
session context) is byte-identical to before.
- Missing/out-of-bounds mentions are skipped defensively.
target2yiri becomes an instance method (like wechatpad/aiocqhttp) so
the converters can hold bot_account_id; LINEAdapter passes it in from
its own config.
LINEEventConverter.target2yiri() built Friend.id/Group.id from
event.message.id, which is unique per message. Every incoming message
therefore mapped to a new session key, so LINE users and groups lost
conversation context on every turn.
Use event.source.user_id/group_id/room_id instead, matching the stable
identifiers other adapters (e.g. Telegram) use for session identity.
Falls back to the group/room id when user_id is absent, per LINE's
documented behavior for some group/room members.
leonoxo