| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Ivan Kopeykin @vankop
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| 4 | */
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| 5 |
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| 6 | ;
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| 7 |
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| 8 | const A_CODE = "a".charCodeAt(0);
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| 9 |
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| 10 | /**
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| 11 | * @param {string} hash hash
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| 12 | * @param {number} hashLength hash length
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| 13 | * @returns {string} returns hash that has at least one non numeric char
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| 14 | */
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| 15 | module.exports = (hash, hashLength) => {
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| 16 | if (hashLength < 1) return "";
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| 17 | const slice = hash.slice(0, hashLength);
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| 18 | if (slice.match(/[^\d]/)) return slice;
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| 19 | return `${String.fromCharCode(
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| 20 | A_CODE + (parseInt(hash[0], 10) % 6)
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| 21 | )}${slice.slice(1)}`;
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| 22 | };
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