27 lines
822 B
TypeScript
27 lines
822 B
TypeScript
// Copyright 2019-2020 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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export function cleanSearchTerm(searchTerm: string): string {
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const lowercase = searchTerm.toLowerCase();
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const withoutSpecialCharacters = lowercase.replace(
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/([!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~])/g,
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' '
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);
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const whiteSpaceNormalized = withoutSpecialCharacters.replace(/\s+/g, ' ');
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const byToken = whiteSpaceNormalized.split(' ');
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const withoutSpecialTokens = byToken.filter(
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token =>
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token &&
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token !== 'and' &&
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token !== 'or' &&
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token !== 'not' &&
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token !== ')' &&
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token !== '(' &&
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token !== '+' &&
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token !== ',' &&
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token !== 'near'
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);
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const withWildcards = withoutSpecialTokens.map(token => `${token}*`);
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return withWildcards.join(' ').trim();
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}
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