fix: sync WebA labels and forward fixes

internal/app/langpack/service_test.go

@@ -0,0 +1,81 @@
+package langpack
+
+import (
+	"context"
+	"testing"
+
+	"telesrv/internal/domain"
+	"telesrv/internal/store/memory"
+)
+
+func TestServiceNormalizesWebARawLangCode(t *testing.T) {
+	ctx := context.Background()
+	packs := memory.NewLangPackStore()
+	svc := NewService(packs)
+	seed := domain.LangPack{
+		LangPack: "android",
+		LangCode: "en",
+		Version:  7,
+		Strings: []domain.LangPackString{
+			{Key: "LogOutTitle", Value: "Log Out"},
+			{Key: "NewMessageTitle", Value: "New Message"},
+		},
+	}
+	if err := packs.UpsertPack(ctx, seed); err != nil {
+		t.Fatalf("seed langpack: %v", err)
+	}
+	webASeed := domain.LangPack{
+		LangPack: "weba",
+		LangCode: "en",
+		Version:  12,
+		Strings: []domain.LangPackString{
+			{Key: "AccDescrPollVoteDown", Value: "Go to next unread poll vote"},
+			{Key: "NewMessageTitle", Value: "New Message from WebA"},
+		},
+	}
+	if err := packs.UpsertPack(ctx, webASeed); err != nil {
+		t.Fatalf("seed weba langpack: %v", err)
+	}
+
+	pack, err := svc.GetLangPack(ctx, "android", "EN-raw")
+	if err != nil {
+		t.Fatalf("get langpack: %v", err)
+	}
+	if pack.LangCode != "en" || pack.Version != webASeed.Version || len(pack.Strings) != len(seed.Strings)+1 {
+		t.Fatalf("pack = %+v, want normalized en pack", pack)
+	}
+	if got := stringValue(pack.Strings, "AccDescrPollVoteDown"); got != "Go to next unread poll vote" {
+		t.Fatalf("AccDescrPollVoteDown = %q, want WebA fallback", got)
+	}
+	if got := stringValue(pack.Strings, "NewMessageTitle"); got != "New Message" {
+		t.Fatalf("NewMessageTitle = %q, want source pack to keep precedence", got)
+	}
+
+	selected, err := svc.GetStrings(ctx, "android", "en-raw", []string{"LogOutTitle", "AccDescrPollVoteDown"})
+	if err != nil {
+		t.Fatalf("get strings: %v", err)
+	}
+	if got := stringValue(selected.Strings, "LogOutTitle"); got != "Log Out" {
+		t.Fatalf("LogOutTitle = %q, want source pack value", got)
+	}
+	if got := stringValue(selected.Strings, "AccDescrPollVoteDown"); got != "Go to next unread poll vote" {
+		t.Fatalf("AccDescrPollVoteDown = %q, want WebA fallback", got)
+	}
+
+	notModified, err := svc.GetDifference(ctx, "android", "en-raw", seed.Version)
+	if err != nil {
+		t.Fatalf("get difference: %v", err)
+	}
+	if notModified.LangCode != "en" || len(notModified.Strings) != 0 {
+		t.Fatalf("difference = %+v, want normalized not-modified source pack", notModified)
+	}
+}
+
+func stringValue(strings []domain.LangPackString, key string) string {
+	for _, item := range strings {
+		if item.Key == key {
+			return item.Value
+		}
+	}
+	return ""
+}