locutus/esm/php/pcre/sql_regcase.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { getPhpLocaleGroup } from "../_helpers/_phpRuntimeState.js";
import { setlocale } from "../strings/setlocale.js";
const isRecord = (value) => typeof value === 'object' && value !== null && !Array.isArray(value);
const defaultUpper = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
const defaultLower = 'abcdefghijklmnopqrstuvwxyz';
export function sql_regcase(str) {
    //  discuss at: https://locutus.io/php/sql_regcase/
    // original by: Brett Zamir (https://brett-zamir.me)
    //   example 1: sql_regcase('Foo - bar.')
    //   returns 1: '[Ff][Oo][Oo] - [Bb][Aa][Rr].'
    let upper = '';
    let lower = '';
    let pos = -1;
    let retStr = '';
    setlocale('LC_ALL', 0);
    const lcCtypeValue = getPhpLocaleGroup('LC_CTYPE', 'LC_CTYPE');
    if (lcCtypeValue && isRecord(lcCtypeValue)) {
        const upperValue = lcCtypeValue.upper;
        const lowerValue = lcCtypeValue.lower;
        upper = typeof upperValue === 'string' ? upperValue : defaultUpper;
        lower = typeof lowerValue === 'string' ? lowerValue : defaultLower;
    }
    else {
        upper = defaultUpper;
        lower = defaultLower;
    }
    if (!upper || !lower) {
        return str;
    }
    // @todo: Make this more readable
    for (let i = 0; i < str.length; i++) {
        if ((pos = upper.indexOf(str.charAt(i))) !== -1 || (pos = lower.indexOf(str.charAt(i))) !== -1) {
            retStr += '[' + upper.charAt(pos) + lower.charAt(pos) + ']';
        }
        else {
            retStr += str.charAt(i);
        }
    }
    return retStr;
}