37 lines
1.5 KiB
JavaScript
37 lines
1.5 KiB
JavaScript
import { convertEmojiSequenceToUTF32 } from "../convert.js";
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import { getSequenceFromEmojiStringOrKeyword } from "../cleanup.js";
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import { getQualifiedEmojiVariations } from "../test/variations.js";
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import { createEmojisTree, parseEmojiTree } from "./tree.js";
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/**
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* Create optimised regex
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*/
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function createOptimisedRegexForEmojiSequences(sequences) {
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sequences = sequences.map((item) => convertEmojiSequenceToUTF32(item));
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const tree = createEmojisTree(sequences);
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const regex = parseEmojiTree(tree);
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return regex.regex;
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}
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/**
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* Create optimised regex for emojis
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*
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* First parameter is array of emojis, entry can be either list of
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* code points or emoji sequence as a string
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*
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* Examples of acceptable strings (case insensitive):
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* '1F636 200D 1F32B FE0F' - space separated UTF32 sequence
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* '1f636-200d-1f32b-fe0f' - dash separated UTF32 sequence
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* 'd83d-de36-200d-d83c-df2b-fe0f' - dash separated UTF16 sequence
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* '\\uD83D\\uDE36\\u200D\\uD83C\\uDF2B\\uFE0F' - UTF16 sequence escaped with '\\u'
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*
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* All examples above refer to the same emoji and will generate the same regex result
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*/
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function createOptimisedRegex(emojis) {
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let sequences = emojis.map((item) => typeof item === "string" ? getSequenceFromEmojiStringOrKeyword(item) : item);
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sequences = getQualifiedEmojiVariations(sequences.map((sequence) => {
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return { sequence };
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})).map((item) => item.sequence);
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return createOptimisedRegexForEmojiSequences(sequences);
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}
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export { createOptimisedRegex, createOptimisedRegexForEmojiSequences }; |