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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
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Files
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Files
lib/phoenix_kit_web/comments_forwarding.ex
defmodule PhoenixKitWeb.CommentsForwarding do
@moduledoc """
Forwards Leaf rich-text editor process messages to the optional
`phoenix_kit_comments` package.
The embedded `CommentsComponent`'s Leaf composer reports its content to the
*host* LiveView via a `{:leaf_changed, _}` process message — LiveComponents
can't receive `handle_info` themselves. The host must forward that message
back into the component, or "Post Comment" silently posts empty content.
`phoenix_kit_comments` is an optional sibling dependency with no compile-order
guarantee, so the call is resolved at runtime via `apply/3` (never a
compile-time-bound `mod.fun(...)` call) and degrades to a no-op when the
package is absent.
Used by `PhoenixKitWeb.Components.MediaBrowser.Embed` (macro-injected handler)
and `PhoenixKitWeb.Live.Users.MediaDetail` (inline handler) — both delegate
their `{:leaf_changed, _}` `handle_info` clause here so the optional-dep
contract lives in one place.
"""
require Logger
@doc """
Forwards a `{:leaf_changed, _}` message to the comments component.
Always returns `{:noreply, socket}`, so it can be used directly as the body of
a host `handle_info({:leaf_changed, _} = msg, socket)` clause. When the
comments package is absent (or its `forward_leaf_event/2` contract drifts) the
message is dropped gracefully — and contract drift is logged.
"""
def forward_leaf_changed(msg, socket) do
# credo:disable-for-next-line Credo.Check.Design.AliasUsage
mod = PhoenixKitComments.Web.CommentsComponent
if Code.ensure_loaded?(mod) and function_exported?(mod, :forward_leaf_event, 2) do
# credo:disable-for-next-line Credo.Check.Refactor.Apply
case apply(mod, :forward_leaf_event, [msg, socket]) do
{:noreply, _} = result ->
result
:pass ->
{:noreply, socket}
other ->
# Optional cross-package contract: forward_leaf_event/2 is expected to
# return {:noreply, socket} or :pass. Anything else shouldn't crash
# the host LiveView — degrade gracefully and log so a contract drift
# in phoenix_kit_comments is diagnosable.
Logger.warning(
"PhoenixKitComments.Web.CommentsComponent.forward_leaf_event/2 " <>
"returned an unexpected value (#{inspect(other)}); ignoring."
)
{:noreply, socket}
end
else
{:noreply, socket}
end
end
end