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/comment_approve_test.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"testing"
+	"time"
+)
+
+func TestCommentApproveBasics(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	commenterHex, _ := commenterNew("test@example.com", "Test", "undefined", "https://example.com/photo.jpg", "google")
+
+	commentHex, _ := commentNew(commenterHex, "example.com", "/path.html", "root", "**foo**", "unapproved", time.Now().UTC())
+
+	if err := commentApprove(commentHex); err != nil {
+		t.Errorf("unexpected error approving comment: %v", err)
+		return
+	}
+
+	if c, _, _ := commentList("anonymous", "example.com", "/path.html", false); c[0].State != "approved" {
+		t.Errorf("expected state = approved got state = %s", c[0].State)
+		return
+	}
+}
+
+func TestCommentApproveEmpty(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	if err := commentApprove(""); err == nil {
+		t.Errorf("expected error not found approving comment with empty commentHex")
+		return
+	}
+}