56 lines
2.0 KiB
Swift
56 lines
2.0 KiB
Swift
//
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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public extension NSRegularExpression {
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@objc
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public func hasMatch(input: String) -> Bool {
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return self.firstMatch(in: input, options: [], range: NSRange(location: 0, length: input.utf16.count)) != nil
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}
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@objc
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public class func parseFirstMatch(pattern: String,
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text: String,
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options: NSRegularExpression.Options = []) -> String? {
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do {
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let regex = try NSRegularExpression(pattern: pattern, options: options)
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guard let match = regex.firstMatch(in: text,
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options: [],
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range: NSRange(location: 0, length: text.utf16.count)) else {
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return nil
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}
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let matchRange = match.range(at: 1)
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guard let textRange = Range(matchRange, in: text) else {
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owsFailDebug("Invalid match.")
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return nil
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}
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let substring = String(text[textRange])
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return substring
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} catch {
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Logger.error("Error: \(error)")
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return nil
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}
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}
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@objc
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public func parseFirstMatch(inText text: String,
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options: NSRegularExpression.Options = []) -> String? {
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guard let match = self.firstMatch(in: text,
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options: [],
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range: NSRange(location: 0, length: text.utf16.count)) else {
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return nil
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}
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let matchRange = match.range(at: 1)
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guard let textRange = Range(matchRange, in: text) else {
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owsFailDebug("Invalid match.")
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return nil
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}
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let substring = String(text[textRange])
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return substring
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}
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}
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