Marc Mintel
5397309103
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56 lines
1.5 KiB
Plaintext
56 lines
1.5 KiB
Plaintext
const minute = 60;
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const hour = minute * 60;
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const day = hour * 24;
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const week = day * 7;
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const year = day * 365.25;
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const REGEX = /^(\+|\-)? ?(\d+|\d+\.\d+) ?(seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)(?: (ago|from now))?$/i;
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export default (str) => {
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const matched = REGEX.exec(str);
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if (!matched || (matched[4] && matched[1])) {
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throw new TypeError('Invalid time period format');
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}
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const value = parseFloat(matched[2]);
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const unit = matched[3].toLowerCase();
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let numericDate;
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switch (unit) {
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case 'sec':
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case 'secs':
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case 'second':
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case 'seconds':
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case 's':
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numericDate = Math.round(value);
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break;
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case 'minute':
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case 'minutes':
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case 'min':
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case 'mins':
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case 'm':
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numericDate = Math.round(value * minute);
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break;
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case 'hour':
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case 'hours':
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case 'hr':
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case 'hrs':
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case 'h':
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numericDate = Math.round(value * hour);
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break;
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case 'day':
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case 'days':
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case 'd':
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numericDate = Math.round(value * day);
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break;
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case 'week':
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case 'weeks':
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case 'w':
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numericDate = Math.round(value * week);
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break;
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default:
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numericDate = Math.round(value * year);
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break;
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}
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if (matched[1] === '-' || matched[4] === 'ago') {
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return -numericDate;
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}
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return numericDate;
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};
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