Class: WhereIsWaldo::RosterChannel

Inherits:
ApplicationCable::Channel show all
Defined in:
app/channels/where_is_waldo/roster_channel.rb

Overview

Roster subscription. The delivery mode is resolved per account at subscribe time (config.roster_mode) and dispatched to the matching RosterDelivery strategy; the client is told the mode via the snapshot and adapts (listen vs. poll). A subject can only ever see their OWN account's roster (org is derived from the authenticated connection), so it's safe by construction.

Modes:

:broadcast - stream_from the shared account stream; deltas are pushed.
:poll      - no stream; the client calls #poll and gets a filtered diff.

Instance Method Summary collapse

Instance Method Details

#poll ⇒ Object

Client-driven poll (pull/nudge modes). Transmits a filtered snapshot (first call / resync) or diff since the last poll for this session.



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# File 'app/channels/where_is_waldo/roster_channel.rb', line 26

def poll
  return unless @wiw_strategy

  @wiw_strategy.poll_messages(@wiw_subject, waldo_session_id).each { |message| transmit(message) }
end

#subscribed ⇒ Object 



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# File 'app/channels/where_is_waldo/roster_channel.rb', line 14

def subscribed
  subject = current_subject
  mode = resolve_mode(subject)
  return reject unless mode

  @wiw_subject = subject
  @wiw_strategy = RosterDelivery.for(mode)
  apply_plan(@wiw_strategy.subscribe_plan(subject, waldo_session_id))
end