import Foundation
let pattern = #"(?<=^CN=)(.*?)(?=\s?,\s?o)"#
let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive])
let testString = #"""
CN= John Q. Public, O=Agency, C=US
CN= John Q. Public, Jr.,O=Agency, C=US
CN=John Q. Public,O=Agency, C=US
CN=John Q. Pu,blic,O=Agency, C=US
CN=some name,ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
CN=some name, ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
CN=some name-Y- , ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
cn= some name-Y-,ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
cn= some na, o me-Y-,ou=Groups,ou=AAA,ou=DCCOMICS,o=boo berries,c=US
(?<=^CN=) - positive lookahead to find string starts with CN= and discard that match
(.*?) - non greedy seach for any single character
(?=,\s?ou\s=|,\s?o\s?=)
(?=,\s?ou\s=|,\s?o\s?=)
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression