31 lines
750 B
JavaScript
31 lines
750 B
JavaScript
const mustNumber = (v) => {
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let num = Number(v);
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if (isNaN(num)) {
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throw new Error('Not number: ' + v);
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}
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return num;
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};
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const parseProperty = (word, types) => {
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let [key, value] = word.split('=');
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if (!value) {
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value = !key.startsWith('no');
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key = value ? key : key.slice(2);
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}
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let type = types[key];
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if (!type) {
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throw new Error('Unknown property: ' + key);
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}
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if (type === 'boolean' && typeof value !== 'boolean' ||
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type !== 'boolean' && typeof value === 'boolean') {
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throw new Error('Invalid argument: ' + word);
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}
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switch (type) {
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case 'string': return [key, value];
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case 'number': return [key, mustNumber(value)];
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case 'boolean': return [key, value];
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}
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};
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export { parseProperty };
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