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@mironal
Created April 15, 2024 06:35
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Count the number of characters typed in the Mastodon post screen.
import Foundation
import RegexBuilder
private let urlRegex = Regex {
Capture(.url(scheme: .required))
}
private let mentionRegex = Regex {
Capture {
ChoiceOf {
#/^/#
One(.word.inverted)
}
}
"@"
Capture {
Regex {
Capture {
OneOrMore {
CharacterClass(
.anyOf("_"),
"a" ... "z",
"0" ... "9"
)
}
}
"@"
OneOrMore {
CharacterClass(
.anyOf(".-"),
"a" ... "z",
"0" ... "9"
)
}
OneOrMore {
CharacterClass(
"a" ... "z",
"0" ... "9"
)
}
}
}
}
.ignoresCase()
func count(
status: String,
spoilerText: String?,
charactersReservedPerURL: Int
) -> Int {
let urlFilling = "".padding(toLength: charactersReservedPerURL, withPad: "_", startingAt: 0)
let replaced = status.replacing(urlRegex, with: urlFilling)
.replacing(mentionRegex) { match in
"\(match.output.1)@\(match.output.3)"
}
return replaced.count + (spoilerText?.count ?? 0)
}
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