79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
import { joinerEmoji, vs16Emoji } from "./data.js";
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import { getEmojiCodePoint } from "./convert.js";
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/**
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* Get emoji sequence from string
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*
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* Examples (shows same emoji sequence formatted differently):
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* '1F441 FE0F 200D 1F5E8 FE0F' => [0x1f441, 0xfe0f, 0x200d, 0x1f5e8, 0xfe0f]
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* '1f441-fe0f-200d-1f5e8-fe0f' => [0x1f441, 0xfe0f, 0x200d, 0x1f5e8, 0xfe0f]
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* '\\uD83D\\uDC41\\uFE0F\\u200D\\uD83D\\uDDE8\\uFE0F' => [0x1f441, 0xfe0f, 0x200d, 0x1f5e8, 0xfe0f]
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*/
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function getEmojiSequenceFromString(value) {
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return value.trim().split(/[^0-9A-F]+/i).filter((item) => item.length > 0).map(getEmojiCodePoint);
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}
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/**
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* Convert emoji sequence or keyword
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*
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* If sequence is characters list, like '1f441-fe0f', it will be converted to [0x1f441, 0xfe0f]
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* If sequence contains anything other than [0-9A-F-\s], it will be converted character by character
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*
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* This is used to treat keywords, like ':cat:' differently when converting strings to sequences
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*/
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function getSequenceFromEmojiStringOrKeyword(value) {
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if (!value.match(/^[0-9a-fA-F-\s]+$/)) {
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const results = [];
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for (const codePoint of value) {
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const code = codePoint.codePointAt(0);
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if (code) results.push(code);
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else return getEmojiSequenceFromString(value);
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}
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return results;
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}
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return getEmojiSequenceFromString(value);
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}
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/**
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* Split emoji sequence by joiner
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*
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* Result represents one emoji, split in smaller sequences separated by 0x200D
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*
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* Example:
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* [0x1FAF1, 0x1F3FB, 0x200D, 0x1FAF2, 0x1F3FC] => [[0x1FAF1, 0x1F3FB], [0x1FAF2, 0x1F3FC]]
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*/
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function splitEmojiSequences(sequence, separator = joinerEmoji) {
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const results = [];
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let queue = [];
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for (let i = 0; i < sequence.length; i++) {
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const code = sequence[i];
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if (code === separator) {
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results.push(queue);
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queue = [];
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} else queue.push(code);
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}
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results.push(queue);
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return results;
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}
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/**
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* Join emoji sequences
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*
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* Parameter represents one emoji, split in smaller sequences
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*
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* Example:
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* [[0x1FAF1, 0x1F3FB], [0x1FAF2, 0x1F3FC]] => [0x1FAF1, 0x1F3FB, 0x200D, 0x1FAF2, 0x1F3FC]
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*/
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function joinEmojiSequences(sequences, separator = joinerEmoji) {
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let results = [];
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for (let i = 0; i < sequences.length; i++) {
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if (i > 0) results.push(separator);
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results = results.concat(sequences[i]);
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}
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return results;
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}
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/**
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* Get unqualified sequence
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*/
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function getUnqualifiedEmojiSequence(sequence) {
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return sequence.filter((num) => num !== vs16Emoji);
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}
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export { getEmojiSequenceFromString, getSequenceFromEmojiStringOrKeyword, getUnqualifiedEmojiSequence, joinEmojiSequences, splitEmojiSequences }; |