046e11de31
* automatically add a link card for urls in the composer simplify was paste check use a set simplify the cross platform reuse web implementation remove log pasting in the middle of a block of text proper regex dont re-add immediately after paste and remove don't use `byteIndex` lfg automatically add link card * `mayBePaste` * remove accidentally pasted url from comment
59 lines
2.7 KiB
TypeScript
59 lines
2.7 KiB
TypeScript
export function addLinkCardIfNecessary({
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uri,
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newText,
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cursorLocation,
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mayBePaste,
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onNewLink,
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prevAddedLinks,
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}: {
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uri: string
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newText: string
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cursorLocation: number
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mayBePaste: boolean
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onNewLink: (uri: string) => void
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prevAddedLinks: Set<string>
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}) {
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// It would be cool if we could just use facet.index.byteEnd, but you know... *upside down smiley*
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const lastCharacterPosition = findIndexInText(uri, newText) + uri.length
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// If the text being added is not from a paste, then we should only check if the cursor is one
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// position ahead of the last character. However, if it is a paste we need to check both if it's
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// the same position _or_ one position ahead. That is because iOS will add a space after a paste if
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// pasting into the middle of a sentence!
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const cursorLocationIsOkay =
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cursorLocation === lastCharacterPosition + 1 || mayBePaste
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// Checking previouslyAddedLinks keeps a card from getting added over and over i.e.
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// Link card added -> Remove link card -> Press back space -> Press space -> Link card added -> and so on
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// We use the isValidUrl regex below because we don't want to add embeds only if the url is valid, i.e.
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// http://facebook is a valid url, but that doesn't mean we want to embed it. We should only embed if
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// the url is a valid url _and_ domain. new URL() won't work for this check.
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const shouldCheck =
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cursorLocationIsOkay && !prevAddedLinks.has(uri) && isValidUrlAndDomain(uri)
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if (shouldCheck) {
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onNewLink(uri)
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prevAddedLinks.add(uri)
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}
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}
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// https://stackoverflow.com/questions/8667070/javascript-regular-expression-to-validate-url
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// question credit Muhammad Imran Tariq https://stackoverflow.com/users/420613/muhammad-imran-tariq
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// answer credit Christian David https://stackoverflow.com/users/967956/christian-david
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function isValidUrlAndDomain(value: string) {
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return /^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(
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value,
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)
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}
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export function findIndexInText(term: string, text: string) {
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// This should find patterns like:
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// HELLO SENTENCE http://google.com/ HELLO
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// HELLO SENTENCE http://google.com HELLO
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// http://google.com/ HELLO.
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// http://google.com/.
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const pattern = new RegExp(`\\b(${term})(?![/w])`, 'i')
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const match = pattern.exec(text)
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return match ? match.index : -1
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}
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