var SqlString = exports; SqlString.escapeId = function (val, forbidQualified) { if (forbidQualified) { return '`' + val.replace(/`/g, '``') + '`'; } return '`' + val.replace(/`/g, '``').replace(/\./g, '`.`') + '`'; }; SqlString.escape = function(val, stringifyObjects, timeZone) { if (val === undefined || val === null) { return 'NULL'; } switch (typeof val) { case 'boolean': return (val) ? 'true' : 'false'; case 'number': return val+''; } if (val instanceof Date) { val = SqlString.dateToString(val, timeZone || "Z"); } if (Buffer.isBuffer(val)) { return SqlString.bufferToString(val); } if (Array.isArray(val)) { return SqlString.arrayToList(val, timeZone); } if (typeof val === 'object') { if (stringifyObjects) { val = val.toString(); } else { return SqlString.objectToValues(val, timeZone); } } val = val.replace(/[\0\n\r\b\t\\\'\"\x1a]/g, function(s) { switch(s) { case "\0": return "\\0"; case "\n": return "\\n"; case "\r": return "\\r"; case "\b": return "\\b"; case "\t": return "\\t"; case "\x1a": return "\\Z"; default: return "\\"+s; } }); return "'"+val+"'"; }; SqlString.arrayToList = function(array, timeZone) { return array.map(function(v) { if (Array.isArray(v)) return '(' + SqlString.arrayToList(v) + ')'; return SqlString.escape(v, true, timeZone); }).join(', '); }; SqlString.format = function(sql, values, timeZone) { values = [].concat(values); return sql.replace(/\?\??/g, function(match) { if (!values.length) { return match; } if (match == "??") { return SqlString.escapeId(values.shift()); } return SqlString.escape(values.shift(), false, timeZone); }); }; SqlString.dateToString = function(date, timeZone) { var dt = new Date(date); if (timeZone != 'local') { var tz = convertTimezone(timeZone); dt.setTime(dt.getTime() + (dt.getTimezoneOffset() * 60000)); if (tz !== false) { dt.setTime(dt.getTime() + (tz * 60000)); } } var year = dt.getFullYear(); var month = zeroPad(dt.getMonth() + 1, 2); var day = zeroPad(dt.getDate(), 2); var hour = zeroPad(dt.getHours(), 2); var minute = zeroPad(dt.getMinutes(), 2); var second = zeroPad(dt.getSeconds(), 2); var millisecond = zeroPad(dt.getMilliseconds(), 3); return year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second + '.' + millisecond; }; SqlString.bufferToString = function(buffer) { var hex = ''; try { hex = buffer.toString('hex'); } catch (err) { // node v0.4.x does not support hex / throws unknown encoding error for (var i = 0; i < buffer.length; i++) { var byte = buffer[i]; hex += zeroPad(byte.toString(16)); } } return "X'" + hex+ "'"; }; SqlString.objectToValues = function(object, timeZone) { var values = []; for (var key in object) { var value = object[key]; if(typeof value === 'function') { continue; } values.push(this.escapeId(key) + ' = ' + SqlString.escape(value, true, timeZone)); } return values.join(', '); }; function zeroPad(number, length) { number = number.toString(); while (number.length < length) { number = '0' + number; } return number; } function convertTimezone(tz) { if (tz == "Z") return 0; var m = tz.match(/([\+\-\s])(\d\d):?(\d\d)?/); if (m) { return (m[1] == '-' ? -1 : 1) * (parseInt(m[2], 10) + ((m[3] ? parseInt(m[3], 10) : 0) / 60)) * 60; } return false; }