Method code for $channel_ui.channel_on()

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---

  1: arg channel;
  2: 
  3: if (!active_channels.contains(channel)) {
  4:     active_channels = active_channels.add(channel, 1);
  5:     if (channel in $channel_db.system_channels())
  6:         .tell("<" + channel + "> You have joined this channel");
  7:     else
  8:         .broadcast(channel, ":has joined this channel.");
  9: } else {
 10:     .tell("You are already on this channel.");
 11: }

---

// Created 24-Jul-1996 as a part of ColdCore, see: @help Credit