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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
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Files
lib/modules/pages/storage/deletion.ex
defmodule PhoenixKit.Modules.Pages.Storage.Deletion do
@moduledoc """
Deletion and trash operations for pages storage.
Handles moving posts to trash, deleting language files,
and deleting versions.
"""
alias PhoenixKit.Modules.Pages.Storage.Paths
alias PhoenixKit.Modules.Pages.Storage.Versions
alias PhoenixKit.Utils.Date, as: UtilsDate
@doc """
Moves a post to the trash folder.
For slug-mode groups, moves the entire post directory (all versions and languages).
For timestamp-mode groups, moves the time folder.
The post directory is moved to:
priv/pages/trash/<group_slug>/<post_identifier>-<timestamp>/
(or priv/blogging/trash/... for legacy groups)
Returns {:ok, trash_path} on success or {:error, reason} on failure.
"""
@spec trash_post(String.t(), String.t()) :: {:ok, String.t()} | {:error, term()}
def trash_post(group_slug, post_identifier) do
post_dir = resolve_post_directory(group_slug, post_identifier)
if File.dir?(post_dir) do
trash_dir = Path.join([Paths.root_path(), "trash", group_slug])
File.mkdir_p!(trash_dir)
timestamp =
UtilsDate.utc_now()
|> Calendar.strftime("%Y-%m-%d-%H-%M-%S")
sanitized_id = sanitize_for_trash(post_identifier)
new_name = "#{sanitized_id}-#{timestamp}"
destination = Path.join(trash_dir, new_name)
case File.rename(post_dir, destination) do
:ok ->
Paths.cleanup_empty_dirs(Path.dirname(post_dir))
{:ok, "trash/#{group_slug}/#{new_name}"}
{:error, reason} ->
{:error, reason}
end
else
{:error, :not_found}
end
end
@doc """
Moves a language file to trash (legacy operation, now just deletes).
"""
@spec trash_language(String.t(), String.t()) :: {:ok, String.t()} | {:error, term()}
def trash_language(group_slug, relative_path) do
full_path = Paths.absolute_path(relative_path)
if File.exists?(full_path) do
trash_dir = Path.join([Paths.root_path(), "trash", group_slug])
File.mkdir_p!(trash_dir)
timestamp =
UtilsDate.utc_now()
|> Calendar.strftime("%Y-%m-%d-%H-%M-%S")
new_name = "#{Path.basename(relative_path)}-#{timestamp}"
destination = Path.join(trash_dir, new_name)
case File.rename(full_path, destination) do
:ok -> {:ok, "trash/#{new_name}"}
{:error, reason} -> {:error, reason}
end
else
{:error, :not_found}
end
end
@doc """
Deletes a specific language file from a post.
For versioned posts, specify the version. For legacy posts, version is ignored.
Refuses to delete the last remaining language file.
Returns :ok on success or {:error, reason} on failure.
"""
@spec delete_language(String.t(), String.t(), String.t(), integer() | nil) ::
:ok | {:error, term()}
def delete_language(group_slug, post_identifier, language_code, version \\ nil) do
post_dir = resolve_post_directory(group_slug, post_identifier)
if File.dir?(post_dir) do
structure = Versions.detect_post_structure(post_dir)
do_delete_language(post_dir, structure, language_code, version, group_slug, post_identifier)
else
{:error, :post_not_found}
end
end
defp do_delete_language(
post_dir,
:versioned,
language_code,
version,
group_slug,
post_identifier
) do
target_version = version || get_latest_version_number(group_slug, post_identifier)
case target_version do
nil ->
{:error, :version_not_found}
v ->
version_dir = Path.join(post_dir, "v#{v}")
delete_language_from_directory(version_dir, language_code)
end
end
defp do_delete_language(post_dir, :legacy, language_code, _version, _group_slug, _post_uuid) do
delete_language_from_directory(post_dir, language_code)
end
defp do_delete_language(_post_dir, :empty, _language_code, _version, _group_slug, _post_uuid) do
{:error, :post_not_found}
end
defp delete_language_from_directory(dir, language_code) do
file_path = Path.join(dir, "#{language_code}.phk")
cond do
not File.exists?(file_path) ->
{:error, :language_not_found}
last_language_file?(dir) ->
{:error, :cannot_delete_last_language}
true ->
File.rm(file_path)
end
end
defp last_language_file?(dir) do
case File.ls(dir) do
{:ok, files} ->
phk_count = Enum.count(files, &String.ends_with?(&1, ".phk"))
phk_count <= 1
{:error, _} ->
true
end
end
defp get_latest_version_number(group_slug, post_identifier) do
case Versions.get_latest_version(group_slug, post_identifier) do
{:ok, v} -> v
_ -> nil
end
end
@doc """
Deletes an entire version of a post.
Moves the version folder to trash instead of permanent deletion.
Refuses to delete the last remaining version or the published version.
Returns :ok on success or {:error, reason} on failure.
"""
@spec delete_version(String.t(), String.t(), integer()) :: :ok | {:error, term()}
def delete_version(group_slug, post_identifier, version) do
post_dir = resolve_post_directory(group_slug, post_identifier)
if File.dir?(post_dir) do
structure = Versions.detect_post_structure(post_dir)
case structure do
:versioned ->
do_delete_version(post_dir, group_slug, post_identifier, version)
:legacy ->
{:error, :not_versioned}
:empty ->
{:error, :post_not_found}
end
else
{:error, :post_not_found}
end
end
defp do_delete_version(post_dir, group_slug, post_identifier, version) do
version_dir = Path.join(post_dir, "v#{version}")
cond do
not File.dir?(version_dir) ->
{:error, :version_not_found}
Versions.version_is_published?(group_slug, post_identifier, version) ->
{:error, :cannot_delete_published_version}
Versions.only_version?(post_dir) ->
{:error, :cannot_delete_last_version}
true ->
trash_dir = Path.join([Paths.root_path(), "trash", group_slug, post_identifier])
File.mkdir_p!(trash_dir)
timestamp =
UtilsDate.utc_now()
|> Calendar.strftime("%Y-%m-%d-%H-%M-%S")
destination = Path.join(trash_dir, "v#{version}-#{timestamp}")
case File.rename(version_dir, destination) do
:ok -> :ok
{:error, reason} -> {:error, reason}
end
end
end
# ============================================================================
# Private Helpers
# ============================================================================
# Resolve the post directory path based on the identifier format
defp resolve_post_directory(group_slug, post_identifier) do
if String.contains?(post_identifier, "/") do
parts = String.split(post_identifier, "/", trim: true)
case parts do
[date, time | _] when byte_size(date) == 10 and byte_size(time) >= 4 ->
Path.join([Paths.group_path(group_slug), date, time])
[slug | _] ->
Path.join([Paths.group_path(group_slug), slug])
end
else
Path.join([Paths.group_path(group_slug), post_identifier])
end
end
# Sanitize identifier for use in trash folder name
defp sanitize_for_trash(identifier) do
identifier
|> String.replace("/", "_")
|> String.replace(":", "-")
end
end