Return translations

main.rb

@@ -28,6 +28,7 @@ get '/words/:id' do
     json({
       primary_form: context.primary_form(word_id),
       part_of_speech: context.part_of_speech_name(word_id),
+      translations: context.translations(word_id),
       examples: context.examples(word_id),
     })
   end
@@ -115,6 +116,37 @@ public
     str unless str.empty?
   end
 
+  def translations(word_id)
+    word_id = Integer word_id
+
+    values = @db_conn.exec_params(
+      (
+        <<~SQL
+          SELECT
+            translation_texts.value,
+            translation_texts.commentary
+          FROM words
+          INNER JOIN translations
+          ON translations.word_id = words.id
+          INNER JOIN translation_texts
+          ON translation_texts.translation_id = translations.id
+          WHERE
+            word_id = $1
+            AND
+            translation_texts.lang_id = $2
+        SQL
+      ),
+      [word_id, user_lang_id],
+    ).to_a
+
+    values.map do |row|
+      {
+        translation: String(row['value']).strip.freeze,
+        commentary: String(row['commentary']).strip.freeze,
+      }.freeze
+    end.freeze
+  end
+
   ##
   # @return [Array<Array(String, String)>]
   #