api,db: add page attributes and thread locking

api/page_new.go

@@ -0,0 +1,24 @@
+package main
+
+import ()
+
+func pageNew(domain string, path string) error {
+	// path can be empty
+	if domain == "" {
+		return errorMissingField
+	}
+
+	statement := `
+		INSERT INTO
+		pages  (domain, path)
+		VALUES ($1,     $2  )
+		ON CONFLICT DO NOTHING;
+	`
+	_, err := db.Exec(statement, domain, path)
+	if err != nil {
+		logger.Errorf("error inserting new page: %v", err)
+		return errorInternal
+	}
+
+	return nil
+}