mirror of https://github.com/iconify/api.git
56 lines
1.2 KiB
TypeScript
56 lines
1.2 KiB
TypeScript
interface MatchPrefixesParams {
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// One prefix
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prefix?: string;
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// Comma separated prefixes
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prefixes?: string;
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}
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/**
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* Filter prefixes
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*
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* returnEmpty = true -> if no filter params set, returns empty array
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* returnEmpty = false -> if no filter params set, returns all filters
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*/
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export function filterPrefixes(prefixes: string[], params: MatchPrefixesParams, returnEmpty: boolean): string[] {
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const exactMatch = params.prefix;
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if (exactMatch) {
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// Exact match
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return prefixes.indexOf(exactMatch) === -1 ? [] : [exactMatch];
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}
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const partialMatch = params.prefixes;
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if (partialMatch) {
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// Split matches by partial and full
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const exact: Set<string> = new Set();
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const partial: string[] = [];
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partialMatch.split(',').forEach((prefix) => {
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if (prefix.slice(-1) === '-') {
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// Partial prefix: 'mdi-'
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partial.push(prefix);
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} else {
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// Exact match
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exact.add(prefix);
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}
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});
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// Filter prefixes
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return prefixes.filter((prefix) => {
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if (exact.has(prefix)) {
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return true;
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}
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for (let i = 0; i < partial.length; i++) {
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const match = partial[i];
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if (prefix.slice(0, match.length) === match) {
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return true;
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}
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}
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return false;
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});
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}
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// No filters
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return returnEmpty ? [] : prefixes;
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}
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