28 lines
708 B
TypeScript
28 lines
708 B
TypeScript
export function parseTags(text: string) {
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const regex = /(?:^|\s)(?:[#][a-z0-9_]+)/gi
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const matches = (text.match(regex) || []).map((match) =>
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match.trim().substring(1)
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)
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const tagSet = new Set()
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const uniqueTags: string[] = []
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// Keep casing of last tag.
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matches.reverse()
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for (const tag of matches) {
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const lowercase = tag.toLowerCase()
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if (!tagSet.has(lowercase)) {
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tagSet.add(lowercase)
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uniqueTags.push(tag)
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}
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}
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uniqueTags.reverse()
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return uniqueTags
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}
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export function parseWordsAsTags(text: string) {
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const taggedText = text
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.split(/\s+/)
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.map((tag) => (tag.startsWith('#') ? tag : `#${tag}`))
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.join(' ')
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return parseTags(taggedText)
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}
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