Counts total number of people editing (owner + spectators).

Generates the Presence topic name for a form.

Examples

editing_topic("docs:my-post:en")
# => "publishing_edit:docs:my-post:en"

Determines if the current socket is the owner (first in the presence list).

Returns {:owner, presences} if this socket is the owner (or same user in different tab), or {:spectator, owner_meta, presences} if a different user is the owner.

Examples

case get_editing_role("blog:my-post", socket.id, current_user.uuid) do
  {:owner, all_presences} ->
    # I can edit!

  {:spectator, owner_metadata, all_presences} ->
    # I'm read-only, sync with owner's state
end

Gets the lock owner's metadata, or nil if no one is editing.

Gets all presences for a form, sorted by join time (FIFO).

Returns a list of tuples: [{socket_id, metadata}, ...]

Gets all spectators (everyone except the first person).

Returns a list of metadata for spectators only.

Subscribes the current process to presence events for a form.

After subscribing, the process will receive:

• %Phoenix.Socket.Broadcast{event: "presence_diff", ...} when users join/leave

Tracks the current LiveView process in a Presence topic.

Parameters

• form_key: The unique key for the post being edited
• socket: The LiveView socket
• user: The current user struct

Examples

track_editing_session("blog:my-post:en", socket, user)
# => {:ok, ref}

Unsubscribes from presence events and editor form events for a form.

Call this when switching languages or versions to clean up subscriptions.

Untracks the current LiveView process from a Presence topic.

Call this when switching languages or versions to release the lock on the previous form before tracking the new one.

Parameters

• form_key: The unique key for the post that was being edited
• socket: The LiveView socket

Examples

untrack_editing_session("blog:my-post:en", socket)
# => :ok