mirror of
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194 lines
4.4 KiB
TypeScript
194 lines
4.4 KiB
TypeScript
// Loaded from https://raw.githubusercontent.com/denjucks/dex/master/lib/query/string.js
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/*eslint max-len: 0, no-var:0 */
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export const charsRegex = /[\0\b\t\n\r\x1a"'\\]/g; // eslint-disable-line no-control-regex
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export const charsMap = {
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'\0': '\\0',
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'\b': '\\b',
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'\t': '\\t',
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'\n': '\\n',
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'\r': '\\r',
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'\x1a': '\\Z',
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'"': '\\"',
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"'": "\\'",
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'\\': '\\\\',
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};
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function wrapEscape(escapeFn) {
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return function finalEscape(val, ctx = {}) {
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return escapeFn(val, finalEscape, ctx);
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};
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}
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export function makeEscape(config = {}) {
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const finalEscapeDate = config.escapeDate || dateToString;
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const finalEscapeArray = config.escapeArray || arrayToList;
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const finalEscapeBuffer = config.escapeBuffer || bufferToString;
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const finalEscapeString = config.escapeString || escapeString;
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const finalEscapeObject = config.escapeObject || escapeObject;
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const finalWrap = config.wrap || wrapEscape;
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function escapeFn(val, finalEscape, ctx) {
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if (val === undefined || val === null) {
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return 'NULL';
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}
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switch (typeof val) {
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case 'boolean':
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return val ? 'true' : 'false';
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case 'number':
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return val + '';
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case 'object':
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if (val instanceof Date) {
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val = finalEscapeDate(val, finalEscape, ctx);
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} else if (Array.isArray(val)) {
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return finalEscapeArray(val, finalEscape, ctx);
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} else if (Buffer.isBuffer(val)) {
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return finalEscapeBuffer(val, finalEscape, ctx);
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} else {
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return finalEscapeObject(val, finalEscape, ctx);
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}
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}
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return finalEscapeString(val, finalEscape, ctx);
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}
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return finalWrap ? finalWrap(escapeFn) : escapeFn;
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}
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export function escapeObject(val, finalEscape, ctx) {
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if (val && typeof val.toSQL === 'function') {
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return val.toSQL(ctx);
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} else {
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return JSON.stringify(val);
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}
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}
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export function arrayToList(array, finalEscape, ctx) {
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let sql = '';
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for (let i = 0; i < array.length; i++) {
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const val = array[i];
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if (Array.isArray(val)) {
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sql +=
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(i === 0 ? '' : ', ') + '(' + arrayToList(val, finalEscape, ctx) + ')';
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} else {
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sql += (i === 0 ? '' : ', ') + finalEscape(val, ctx);
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}
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}
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return sql;
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}
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export function bufferToString(buffer) {
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return 'X' + escapeString(buffer.toString('hex'));
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}
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export function escapeString(val, finalEscape, ctx) {
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let chunkIndex = (charsRegex.lastIndex = 0);
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let escapedVal = '';
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let match;
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while ((match = charsRegex.exec(val))) {
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escapedVal += val.slice(chunkIndex, match.index) + charsMap[match[0]];
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chunkIndex = charsRegex.lastIndex;
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}
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if (chunkIndex === 0) {
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// Nothing was escaped
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return "'" + val + "'";
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}
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if (chunkIndex < val.length) {
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return "'" + escapedVal + val.slice(chunkIndex) + "'";
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}
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return "'" + escapedVal + "'";
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}
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export function dateToString(date, finalEscape, ctx = {}) {
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const timeZone = ctx.timeZone || 'local';
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const dt = new Date(date);
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let year;
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let month;
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let day;
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let hour;
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let minute;
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let second;
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let millisecond;
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if (timeZone === 'local') {
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year = dt.getFullYear();
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month = dt.getMonth() + 1;
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day = dt.getDate();
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hour = dt.getHours();
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minute = dt.getMinutes();
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second = dt.getSeconds();
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millisecond = dt.getMilliseconds();
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} else {
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const tz = convertTimezone(timeZone);
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if (tz !== false && tz !== 0) {
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dt.setTime(dt.getTime() + tz * 60000);
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}
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year = dt.getUTCFullYear();
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month = dt.getUTCMonth() + 1;
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day = dt.getUTCDate();
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hour = dt.getUTCHours();
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minute = dt.getUTCMinutes();
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second = dt.getUTCSeconds();
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millisecond = dt.getUTCMilliseconds();
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}
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// YYYY-MM-DD HH:mm:ss.mmm
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return (
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zeroPad(year, 4) +
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'-' +
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zeroPad(month, 2) +
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'-' +
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zeroPad(day, 2) +
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' ' +
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zeroPad(hour, 2) +
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':' +
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zeroPad(minute, 2) +
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':' +
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zeroPad(second, 2) +
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'.' +
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zeroPad(millisecond, 3)
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);
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}
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function zeroPad(number, length) {
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number = number.toString();
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while (number.length < length) {
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number = '0' + number;
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}
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return number;
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}
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function convertTimezone(tz) {
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if (tz === 'Z') {
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return 0;
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}
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const m = tz.match(/([+\-\s])(\d\d):?(\d\d)?/);
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if (m) {
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return (
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(m[1] == '-' ? -1 : 1) *
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(parseInt(m[2], 10) + (m[3] ? parseInt(m[3], 10) : 0) / 60) *
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60
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);
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}
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return false;
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}
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export default {
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arrayToList,
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bufferToString,
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dateToString,
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escapeString,
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charsRegex,
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charsMap,
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escapeObject,
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makeEscape,
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};
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