28 lines
724 B
JavaScript
28 lines
724 B
JavaScript
class ChallengeTitles {
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constructor() {
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this.knownTitles = [];
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}
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check(title) {
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if (typeof title !== 'string') {
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throw new Error(
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`Expected a valid string for ${title}, but got a(n) ${typeof title}`
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);
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}
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const titleToCheck = title.replace(/\s+/g, '').toLowerCase();
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if (titleToCheck.length === 0) {
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throw new Error('Expected a title length greater than 0');
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}
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const isKnown = this.knownTitles.includes(titleToCheck);
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if (isKnown) {
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throw new Error(`
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All challenges must have a unique title.
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The title ${title} is already assigned
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`);
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}
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this.knownTitles = [...this.knownTitles, titleToCheck];
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}
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}
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module.exports = ChallengeTitles;
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