sernatur/lib/dbwrapper.vala

namespace Sernatur {
	/**
	 * This is the database namespace for Sernatur
	 */
	namespace DB {
		/**
		 * This is a wrapper for Postgres that allows easier use of the database
		 */
		namespace Wrapper {
			using Postgres;

			public errordomain Field {
				NOTFOUND
			}

			public class ResultWrapper : GLib.Object {
				public unowned Result result { get; set; default = null; }

				public ResultWrapper (Result? result = null) {
					this.result = result;
				}

				public string get_string_v (int tup_num, int field_num) {
					return result.get_value (tup_num, field_num);
				}

				public int get_int_v (int tup_num, int field_num) {
					return int.parse (result.get_value (tup_num, field_num));
				}

				public float get_float_v (int tup_num, int field_num) {
					return float.parse(result.get_value (tup_num, field_num));
				}

				public double get_double_v (int tup_num, int field_num) {
					return double.parse (result.get_value (tup_num, field_num));
				}

				public string get_string_n (int tup_num, string name) throws Field {
					return get_string_v (tup_num, check_field_found (result.get_field_number (name), name));
				}

				public int get_int_n (int tup_num, string name) throws Field {
					return get_int_v (tup_num, check_field_found (result.get_field_number (name), name));
				}

				public float get_float_n (int tup_num, string name) throws Field {
					return get_float_v (tup_num, check_field_found (result.get_field_number (name), name));
				}

				public double get_double_n (int tup_num, string name) throws Field {
					return get_double_v (tup_num, check_field_found (result.get_field_number (name), name));
				}

				private int check_field_found (int field_num, string name) throws Field {
					if (field_num == -1) {
						throw new Field.NOTFOUND (dgettext (null, "The field %s was not found in the query results!"), name);
					}
					return field_num;
				}
			}
		}
	}
}