api: Add go files

I know this is a huge commit, but I can't be bothered to check
this in part by part.

api/domain_moderator_test.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"testing"
+)
+
+func TestDomainModeratorListBasics(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	domainModeratorNew("example.com", "test@example.com")
+	domainModeratorNew("example.com", "test2@example.com")
+
+	mods, err := domainModeratorList("example.com")
+	if err != nil {
+		t.Errorf("unexpected error listing domain moderators: %v", err)
+		return
+	}
+
+	if len(mods) != 2 {
+		t.Errorf("expected number of domain moderators to be 2 got %d", len(mods))
+		return
+	}
+
+	if mods[0].Email != "test@example.com" {
+		t.Errorf("expected first domain to be test@example.com got %s", mods[0].Email)
+		return
+	}
+
+	if mods[1].Email != "test2@example.com" {
+		t.Errorf("expected first domain to be test2@example.com got %s", mods[0].Email)
+		return
+	}
+}
+
+func TestIsDomainModeratorBasics(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	domainModeratorNew("example.com", "test@example.com")
+
+	isMod, err := isDomainModerator("example.com", "test@example.com")
+	if err != nil {
+		t.Errorf("unexpected error checking if email is a moderator: %v", err)
+		return
+	}
+
+	if !isMod {
+		t.Errorf("expected test@example.com to be a moderator got isMod=false")
+		return
+	}
+
+	isMod, err = isDomainModerator("example.com", "test2@example.com")
+	if err != nil {
+		t.Errorf("unexpected error checking if email is a moderator: %v", err)
+		return
+	}
+
+	if isMod {
+		t.Errorf("expected test2@example.com to not be a moderator got isMod=true")
+		return
+	}
+}