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/owner_confirm_hex_test.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"testing"
+	"time"
+)
+
+func TestOwnerConfirmHexBasics(t *testing.T) {
+	failTestOnError(t, setupTestEnv())
+
+	ownerHex, _ := ownerNew("test@example.com", "Test", "hunter2")
+
+	statement := `
+    UPDATE owners
+    SET confirmedEmail=false;
+  `
+	_, err := db.Exec(statement)
+	if err != nil {
+		t.Errorf("unexpected error when setting confirmedEmail=false: %v", err)
+		return
+	}
+
+	confirmHex, _ := randomHex(32)
+
+	statement = `
+    INSERT INTO
+    ownerConfirmHexes (confirmHex, ownerHex, sendDate)
+    VALUES            ($1,         $2,       $3      );
+  `
+	_, err = db.Exec(statement, confirmHex, ownerHex, time.Now().UTC())
+	if err != nil {
+		t.Errorf("unexpected error creating inserting confirmHex: %v\n", err)
+		return
+	}
+
+	if err = ownerConfirmHex(confirmHex); err != nil {
+		t.Errorf("unexpected error confirming hex: %v", err)
+		return
+	}
+
+	statement = `
+    SELECT confirmedEmail
+    FROM owners
+    WHERE ownerHex=$1;
+  `
+	row := db.QueryRow(statement, ownerHex)
+
+	var confirmedHex bool
+	if err = row.Scan(&confirmedHex); err != nil {
+		t.Errorf("unexpected error scanning confirmedEmail: %v", err)
+		return
+	}
+
+	if !confirmedHex {
+		t.Errorf("confirmedHex expected to be true after confirmation; found to be false")
+		return
+	}
+}