From 463e55faa5bd14ae897083606a213dfa896e4963 Mon Sep 17 00:00:00 2001
From: Mathias Polligkeit <git@woylie.de>
Date: Tue, 12 Dec 2023 23:23:11 +0900
Subject: [PATCH] allow setting gettext module

---
 README.md    |  5 +++++
 lib/doggo.ex | 29 +++++++++++++++++++++++------
 mix.exs      |  1 +
 mix.lock     |  2 ++
 4 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index 5bbce903..69808bef 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,11 @@ def deps do
 end
 ```
 
+To allow Doggo to translate certain strings such as form field errors with
+Gettext, set your Gettext module in `config/config.exs`:
+
+    config :doggo, gettext: MyApp.Gettext
+
 ## Design decisions
 
 - Favor semantic HTML elements over CSS classes for structure and clarity.
diff --git a/lib/doggo.ex b/lib/doggo.ex
index d4e8f5f2..d7dcc713 100644
--- a/lib/doggo.ex
+++ b/lib/doggo.ex
@@ -988,6 +988,13 @@ defmodule Doggo do
 
   - `"select"` - For `<select>` elements.
 
+  ## Gettext
+
+  To translate field errors using Gettext, configure your Gettext module in
+  `config/config.exs`.
+
+      config :doggo, gettext: MyApp.Gettext
+
   ## Examples
 
       <.input field={@form[:name]} />
@@ -1077,9 +1084,14 @@ defmodule Doggo do
   slot :description, doc: "A field description to render underneath the input."
 
   def input(%{field: %Phoenix.HTML.FormField{} = field} = assigns) do
+    gettext_module = Application.get_env(:doggo, :gettext)
+
     assigns
     |> assign(field: nil, id: assigns.id || field.id)
-    |> assign(:errors, Enum.map(field.errors, &translate_error(&1)))
+    |> assign(
+      :errors,
+      Enum.map(field.errors, &translate_error(&1, gettext_module))
+    )
     |> assign_new(:validations, fn ->
       Form.input_validations(field.form, field.field)
     end)
@@ -1456,16 +1468,21 @@ defmodule Doggo do
 
   defp field_description_id(id) when is_binary(id), do: "#{id}_description"
 
-  def translate_error({msg, opts}) do
+  defp translate_error({msg, opts}, gettext_module)
+       when is_atom(gettext_module) do
+    if count = opts[:count] do
+      Gettext.dngettext(gettext_module, "errors", msg, msg, count, opts)
+    else
+      Gettext.dgettext(gettext_module, "errors", msg, opts)
+    end
+  end
+
+  defp translate_error({msg, opts}, nil) do
     Enum.reduce(opts, msg, fn {key, value}, acc ->
       String.replace(acc, "%{#{key}}", fn _ -> to_string(value) end)
     end)
   end
 
-  def translate_errors(errors, field) when is_list(errors) do
-    for {^field, {msg, opts}} <- errors, do: translate_error({msg, opts})
-  end
-
   @doc """
   Renders a modal.
 
diff --git a/mix.exs b/mix.exs
index 40e8851f..aca3af0f 100644
--- a/mix.exs
+++ b/mix.exs
@@ -48,6 +48,7 @@ defmodule Doggo.MixProject do
       {:ex_doc, "~> 0.21", only: :dev, runtime: false},
       {:excoveralls, "~> 0.18.0", runtime: false, only: [:test]},
       {:floki, ">= 0.30.0", only: :test},
+      {:gettext, "~> 0.20", optional: true},
       {:jason, "~> 1.0", only: [:dev, :test]},
       {:phoenix_live_view, "~> 0.20.0"}
     ]
diff --git a/mix.lock b/mix.lock
index a2aa80ab..9830f251 100644
--- a/mix.lock
+++ b/mix.lock
@@ -7,8 +7,10 @@
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
   "ex_doc": {:hex, :ex_doc, "0.30.9", "d691453495c47434c0f2052b08dd91cc32bc4e1a218f86884563448ee2502dd2", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "d7aaaf21e95dc5cddabf89063327e96867d00013963eadf2c6ad135506a8bc10"},
   "excoveralls": {:hex, :excoveralls, "0.18.0", "b92497e69465dc51bc37a6422226ee690ab437e4c06877e836f1c18daeb35da9", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "1109bb911f3cb583401760be49c02cbbd16aed66ea9509fc5479335d284da60b"},
+  "expo": {:hex, :expo, "0.5.1", "249e826a897cac48f591deba863b26c16682b43711dd15ee86b92f25eafd96d9", [:mix], [], "hexpm", "68a4233b0658a3d12ee00d27d37d856b1ba48607e7ce20fd376958d0ba6ce92b"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
   "floki": {:hex, :floki, "0.35.2", "87f8c75ed8654b9635b311774308b2760b47e9a579dabf2e4d5f1e1d42c39e0b", [:mix], [], "hexpm", "6b05289a8e9eac475f644f09c2e4ba7e19201fd002b89c28c1293e7bd16773d9"},
+  "gettext": {:hex, :gettext, "0.24.0", "6f4d90ac5f3111673cbefc4ebee96fe5f37a114861ab8c7b7d5b30a1108ce6d8", [:mix], [{:expo, "~> 0.5.1", [hex: :expo, repo: "hexpm", optional: false]}], "hexpm", "bdf75cdfcbe9e4622dd18e034b227d77dd17f0f133853a1c73b97b3d6c770e8b"},
   "jason": {:hex, :jason, "1.4.1", "af1504e35f629ddcdd6addb3513c3853991f694921b1b9368b0bd32beb9f1b63", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "fbb01ecdfd565b56261302f7e1fcc27c4fb8f32d56eab74db621fc154604a7a1"},
   "makeup": {:hex, :makeup, "1.1.1", "fa0bc768698053b2b3869fa8a62616501ff9d11a562f3ce39580d60860c3a55e", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "5dc62fbdd0de44de194898b6710692490be74baa02d9d108bc29f007783b0b48"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.16.1", "cc9e3ca312f1cfeccc572b37a09980287e243648108384b97ff2b76e505c3555", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "e127a341ad1b209bd80f7bd1620a15693a9908ed780c3b763bccf7d200c767c6"},