| 1 | /**
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| 2 | * Truncates a string to the given number of chars (maxLength) by inserting '...' in the middle of that string.
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| 3 | * Partially taken from https://stackoverflow.com/a/5723274/3192470.
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| 4 | *
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| 5 | * @param {string} string - string to be truncated
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| 6 | * @param {number} maxLength - maximum size of the resulting string
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| 7 | * @returns {string}
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| 8 | */
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| 9 | module.exports = function truncateString (string, maxLength) {
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| 10 | const separator = '...'
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| 11 |
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| 12 | // Return original string if it's already shorter than maxLength
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| 13 | if (string.length <= maxLength) {
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| 14 | return string
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| 15 | // Return truncated substring without '...' if string can't be meaningfully truncated
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| 16 | } if (maxLength <= separator.length) {
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| 17 | return string.substr(0, maxLength)
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| 18 | // Return truncated string divided in half by '...'
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| 19 | }
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| 20 | const charsToShow = maxLength - separator.length
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| 21 | const frontChars = Math.ceil(charsToShow / 2)
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| 22 | const backChars = Math.floor(charsToShow / 2)
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| 23 |
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| 24 | return string.substr(0, frontChars) + separator + string.substr(string.length - backChars)
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| 25 | }
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