From 1623ab73dea22fbc63abf759245627926b2a5b63 Mon Sep 17 00:00:00 2001
From: f <f@sutty.nl>
Date: Sat, 11 Sep 2021 17:00:28 -0300
Subject: [PATCH] Soportar un campo con una lista de valores predefinidos y
 elegir uno

---
 app/models/metadata_predefined_value.rb       | 24 +++++++++++++++++++
 .../posts/attribute_ro/_predefined_value.haml |  3 +++
 .../posts/attributes/_predefined_value.haml   |  7 ++++++
 3 files changed, 34 insertions(+)
 create mode 100644 app/models/metadata_predefined_value.rb
 create mode 100644 app/views/posts/attribute_ro/_predefined_value.haml
 create mode 100644 app/views/posts/attributes/_predefined_value.haml

diff --git a/app/models/metadata_predefined_value.rb b/app/models/metadata_predefined_value.rb
new file mode 100644
index 00000000..9cf36382
--- /dev/null
+++ b/app/models/metadata_predefined_value.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+# Un campo de texto seleccionado de una lista de valores posibles
+class MetadataPredefinedValue < MetadataString
+  # Obtiene todos los valores desde el layout, en un formato compatible
+  # con options_for_select.
+  #
+  # @return [Hash]
+  def values
+    @values ||= layout.dig(:metadata, name, 'values', I18n.locale.to_s)&.invert || {}
+  end
+
+  private
+
+  # Solo permite almacenar los valores predefinidos.
+  #
+  # @return [String]
+  def sanitize(string)
+    v = super string
+    return '' unless values.values.include? v
+
+    v
+  end
+end
diff --git a/app/views/posts/attribute_ro/_predefined_value.haml b/app/views/posts/attribute_ro/_predefined_value.haml
new file mode 100644
index 00000000..67642e2c
--- /dev/null
+++ b/app/views/posts/attribute_ro/_predefined_value.haml
@@ -0,0 +1,3 @@
+%tr{ id: attribute }
+  %th= post_label_t(attribute, post: post)
+  %td{ dir: dir, lang: locale }= metadata.value
diff --git a/app/views/posts/attributes/_predefined_value.haml b/app/views/posts/attributes/_predefined_value.haml
new file mode 100644
index 00000000..b0d21f35
--- /dev/null
+++ b/app/views/posts/attributes/_predefined_value.haml
@@ -0,0 +1,7 @@
+.form-group
+  = label_tag "#{base}_#{attribute}", post_label_t(attribute, post: post)
+  = select_tag(plain_field_name_for(base, attribute),
+    options_for_select(metadata.values, metadata.value),
+    **field_options(attribute, metadata), include_blank: t('.empty'))
+  = render 'posts/attribute_feedback',
+    post: post, attribute: attribute, metadata: metadata