Unique Singular/Plural Messages (#366)

lib/gettext/compiler.ex

@@ -622,7 +622,7 @@ defmodule Gettext.Compiler do
          kind,
          locale,
          %Message.Plural{} = message,
-         _singular_fun,
+         singular_fun,
          plural_fun,
          file,
          {plural_forms_fun, nplurals},
@@ -665,22 +665,54 @@ defmodule Gettext.Compiler do
               line: unquote(Message.source_line_number(message, :msgid))
         end
 
-      quote generated: true do
-        Kernel.unquote(kind)(
-          unquote(plural_fun)(
-            unquote(msgctxt),
-            unquote(msgid),
-            unquote(msgid_plural),
-            n,
-            bindings
-          )
-        ) do
-          plural_form = unquote(plural_forms_fun)(n)
+      singular_fun_impl =
+        msgstr
+        |> Enum.find(&match?({0, _msgstr}, &1))
+        |> case do
+          {0, ""} ->
+            nil
+
+          {0, msgstr} ->
+            quote do
+              Kernel.unquote(kind)(
+                unquote(singular_fun)(unquote(msgctxt), unquote(msgid), bindings)
+              ) do
+                require unquote(interpolation_module)
+
+                unquote(interpolation_module).compile_interpolate(
+                  :translation,
+                  unquote(msgstr),
+                  bindings
+                )
+              end
+            end
+
+          nil ->
+            nil
+        end
+
+      plural_fun_impl =
+        quote generated: true do
+          Kernel.unquote(kind)(
+            unquote(plural_fun)(
+              unquote(msgctxt),
+              unquote(msgid),
+              unquote(msgid_plural),
+              n,
+              bindings
+            )
+          ) do
+            plural_form = unquote(plural_forms_fun)(n)
 
-          var!(bindings) = Map.put(bindings, :count, n)
+            var!(bindings) = Map.put(bindings, :count, n)
 
-          case plural_form, do: unquote(clauses ++ error_clause)
+            case plural_form, do: unquote(clauses ++ error_clause)
+          end
         end
+
+      quote do
+        unquote(singular_fun_impl)
+        unquote(plural_fun_impl)
       end
     end
   end

lib/gettext/extractor.ex

@@ -337,10 +337,7 @@ defmodule Gettext.Extractor do
     }
   end
 
-  defp merge_message(
-         %Message.Singular{} = old,
-         %Message.Singular{comments: []} = new
-       ) do
+  defp merge_message(old, new) do
     ensure_empty_msgstr!(old)
     ensure_empty_msgstr!(new)
 
@@ -353,36 +350,15 @@ defmodule Gettext.Extractor do
         old.flags
       end
 
-    %Message.Singular{
-      msgid: old.msgid,
-      msgstr: old.msgstr,
-      msgctxt: new.msgctxt,
+    old
+    |> Message.merge(new)
+    |> Map.merge(%{
       flags: flags,
-      # The new in-memory message has no comments since it was extracted
-      # from the source code.
-      comments: old.comments,
       # We don't care about the references of the old message since the new
       # in-memory message has all the actual and current references.
       references: new.references,
       extracted_comments: new.extracted_comments
-    }
-  end
-
-  defp merge_message(%Message.Plural{} = old, %Message.Plural{comments: []} = new) do
-    ensure_empty_msgstr!(old)
-    ensure_empty_msgstr!(new)
-
-    # The logic here is the same as for %Message.Singular{}s.
-    %Message.Plural{
-      msgid: old.msgid,
-      msgctxt: new.msgctxt,
-      msgid_plural: old.msgid_plural,
-      msgstr: old.msgstr,
-      flags: old.flags,
-      comments: old.comments,
-      references: new.references,
-      extracted_comments: new.extracted_comments
-    }
+    })
   end
 
   defp ensure_empty_msgstr!(%Message.Singular{msgstr: msgstr} = message) do
@@ -392,8 +368,8 @@ defmodule Gettext.Extractor do
     end
   end
 
-  defp ensure_empty_msgstr!(%Message.Plural{msgstr: %{0 => str0, 1 => str1}} = message) do
-    if not blank?(str0) or not blank?(str1) do
+  defp ensure_empty_msgstr!(%Message.Plural{msgstr: msgstr} = message) do
+    if Enum.any?(Map.values(msgstr), &(not blank?(&1))) do
       raise Error,
             "plural message with msgid '#{IO.iodata_to_binary(message.msgid)}' has a non-empty msgstr"
     end

lib/gettext/merger.ex

@@ -205,33 +205,15 @@ defmodule Gettext.Merger do
   # flags: we should take the new flags and preserve the fuzzy flag
   # references: new contains the updated and most recent references
 
-  defp merge_two_messages(
-         %Message.Singular{} = old,
-         %Message.Singular{} = new,
-         custom_flags_to_keep
-       ) do
-    %Message.Singular{
-      msgctxt: new.msgctxt,
-      msgid: new.msgid,
-      msgstr: old.msgstr,
+  defp merge_two_messages(old, new, custom_flags_to_keep) do
+    old
+    |> Message.merge(new)
+    |> Map.merge(%{
       comments: old.comments,
       extracted_comments: new.extracted_comments,
       flags: merge_flags(old, new, custom_flags_to_keep),
       references: new.references
-    }
-  end
-
-  defp merge_two_messages(%Message.Plural{} = old, %Message.Plural{} = new, custom_flags_to_keep) do
-    %Message.Plural{
-      msgctxt: new.msgctxt,
-      msgid: new.msgid,
-      msgid_plural: new.msgid_plural,
-      msgstr: old.msgstr,
-      comments: old.comments,
-      extracted_comments: new.extracted_comments,
-      flags: merge_flags(old, new, custom_flags_to_keep),
-      references: new.references
-    }
+    })
   end
 
   defp merge_flags(old_message, new_message, custom_flags_to_keep) do

mix.exs

@@ -49,7 +49,7 @@ defmodule Gettext.Mixfile do
 
   defp deps do
     [
-      {:expo, "~> 0.4.0"},
+      {:expo, "~> 0.5.1"},
 
       # Dev and test dependencies
       {:ex_doc, "~> 0.19", only: :dev},

mix.lock

@@ -2,7 +2,7 @@
   "earmark_parser": {:hex, :earmark_parser, "1.4.29", "149d50dcb3a93d9f3d6f3ecf18c918fb5a2d3c001b5d3305c926cddfbd33355b", [:mix], [], "hexpm", "4902af1b3eb139016aed210888748db8070b8125c2342ce3dcae4f38dcc63503"},
   "ex_doc": {:hex, :ex_doc, "0.29.1", "b1c652fa5f92ee9cf15c75271168027f92039b3877094290a75abcaac82a9f77", [:mix], [{:earmark_parser, "~> 1.4.19", [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", "b7745fa6374a36daf484e2a2012274950e084815b936b1319aeebcf7809574f6"},
   "excoveralls": {:hex, :excoveralls, "0.17.0", "279f124dba347903bb654bc40745c493ae265d45040001b4899ea1edf88078c7", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "08b638d114387a888f9cb8d65f2a0021ec04c3e447b793efa7c1e734aba93004"},
-  "expo": {:hex, :expo, "0.4.0", "bbe4bf455e2eb2ebd2f1e7d83530ce50fb9990eb88fc47855c515bfdf1c6626f", [:mix], [], "hexpm", "a8ed1683ec8b7c7fa53fd7a41b2c6935f539168a6bb0616d7fd6b58a36f3abf2"},
+  "expo": {:hex, :expo, "0.5.0", "12035d6528e4fd6a9df5f71160ec114cce7f520f4c827fffe1f6760f1d8b4900", [:mix], [], "hexpm", "5a0231c3cf2fb221c313786cdc62aab91b99042c950d47bdb2e51b77d88df722"},
   "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, "1.1.0", "6b67c8bc2882a6b6a445859952a602afc1a41c2e08379ca057c0f525366fc3ca", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "0a45ed501f4a8897f580eabf99a2e5234ea3e75a4373c8a52824f6e873be57a6"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.16.0", "f8c570a0d33f8039513fbccaf7108c5d750f47d8defd44088371191b76492b0b", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "28b2cbdc13960a46ae9a8858c4bebdec3c9a6d7b4b9e7f4ed1502f8159f338e7"},

test/gettext/extractor_test.exs

@@ -137,8 +137,9 @@ defmodule Gettext.ExtractorTest do
 
       ts2 = [
         %Message.Singular{msgid: ["non-matching non-autogenerated"]},
-        %Message.Singular{
+        %Message.Plural{
           msgid: ["matching autogenerated"],
+          msgid_plural: ["matching non-autogenerated 2"],
           references: [{"foo.ex", 3}],
           extracted_comments: ["#. Bar"],
           flags: [["elixir-autogen"]]
@@ -152,8 +153,9 @@ defmodule Gettext.ExtractorTest do
              ) ==
                %Messages{
                  messages: [
-                   %Message.Singular{
+                   %Message.Plural{
                      msgid: ["matching autogenerated"],
+                     msgid_plural: ["matching non-autogenerated 2"],
                      references: [{"foo.ex", 3}],
                      flags: [["elixir-autogen"]],
                      extracted_comments: ["#. Bar"]

test/gettext_test.exs

@@ -262,6 +262,15 @@ defmodule GettextTest do
              )
   end
 
+  test "plural messages can be used for singular message" do
+    import Translator, only: [lgettext: 5]
+
+    message =
+      lgettext("it", "errors", nil, "There was an error", %{})
+
+    assert message == {:ok, "C'è stato un errore"}
+  end
+
   test "by default, non-found pluralized message behave like regular message" do
     assert Translator.lngettext("it", "not a domain", nil, "foo", "foos", 1, %{}) ==
              {:default, "foo"}