The BM chat context implements golem15.chat's LiveMembership, so every
participant check also requires chat-group membership: a removed user
loses # ogólny, their DMs, uploads, subscriptions and chat:message
delivery at once instead of after the next participant sync.
- ChatContext implements golem15.chat's MessageModerator: moderator
group members who are chat members delete in group conversations
only, never in DMs
- GET /chat/embeds?type=deadline|class|reading&q= (members only,
at most 20 rows, escaped ILIKE, q at most 100 characters)
- POST /chat/embeds/resolve {refs} (members only, at most 50 distinct
refs, 8 KiB body): current data or null per ref
GET /_bm/api/v1/chat gives a chat-group member ogólny (the bm/1 group
conversation, adopted once as the system default channel under an
advisory lock), its unread and mention counts, the member's DMs newest
message first, the moderator flag and the composer limits. Every member
bootstrap syncs participants with the group: missing members join
ogólny, users no longer in the group lose their rows in every bm/1
conversation. A non-member gets only member:false and is pruned.
GET /_bm/api/v1/chat/members lists members (id, name, surname, handle,
is_bot from golem15.chatbots when active) and assigns missing handles;
non-members get 404.
The chatchannels access policy (ChatAccess) is installed from a
database hook: bm/1 for members only, nobody manages channels.
bm:chat-sync creates the groups when missing, syncs and assigns
handles. Migration 20261026130000_seed_jz_bm_chat_groups creates
studenci and moderatorzy without members; its rollback keeps them.
When golem15.chat is active, Boot registers the context alias bm (id 1)
on its registry. Membership is the user group jz.bm.chat.group (default
studenci); CanOverseeChats is always false, so nobody reads other
people's DMs or edits their messages; the broadcast channel is
chat:context:1, never empty.
GET /_bm/api/v1/chat answers the caller's membership behind jwt.auth and
the per-user bucket jz.bm.chat (240 a minute). The chat config block
(group, moderator_group, max_upload_bytes, max_embeds) is added. jz.bm
still Requires only golem15.user; all chat wiring is gated by HasPlugin.
