@allgemein/eventbus/utils/CryptUtils.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.CryptUtils = void 0;
class CryptUtils {
    static bitwise(str) {
        let hash = 0;
        if (str.length === 0) {
            return hash;
        }
        for (let i = 0; i < str.length; i++) {
            const ch = str.charCodeAt(i);
            // tslint:disable-next-line:no-bitwise
            hash = ((hash << 5) - hash) + ch;
            // tslint:disable-next-line:no-bitwise
            hash = hash & hash; // Convert to 32bit integer
        }
        return hash;
    }
    static binaryTransfer(integer, binary) {
        binary = binary || 62;
        const stack = [];
        let num;
        let result = '';
        const sign = integer < 0 ? '-' : '';
        function table(num) {
            const t = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
            return t[num];
        }
        integer = Math.abs(integer);
        while (integer >= binary) {
            num = integer % binary;
            integer = Math.floor(integer / binary);
            stack.push(table(num));
        }
        if (integer > 0) {
            stack.push(table(integer));
        }
        for (let i = stack.length - 1; i >= 0; i--) {
            result += stack[i];
        }
        return sign + result;
    }
    /**
     * why choose 61 binary, because we need the last element char to replace the minus sign
     * eg: -aGtzd will be ZaGtzd
     */
    static shorthash(text) {
        const id = this.binaryTransfer(this.bitwise(text), 61);
        return id.replace('-', 'Z');
    }
    static random(_len = 8) {
        const chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz';
        let rs = '';
        const len = _len || 8;
        for (let i = 0; i < len; i++) {
            const pos = Math.floor(Math.random() * chars.length);
            rs += chars.substring(pos, pos + 1);
        }
        return rs;
    }
}
exports.CryptUtils = CryptUtils;
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