Created
February 25, 2021 20:14
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| private func formatIP(with text: String) -> String { | |
| let divider = "." | |
| var ipBlocks = text.components(separatedBy: divider) | |
| let lastBlock = ipBlocks.popLast() ?? "" | |
| guard let number = Int(lastBlock), number > 0 else { | |
| if let lastSymbol = text.last, | |
| String(lastSymbol) == divider, | |
| let lastIpBlock = ipBlocks.last, | |
| !lastIpBlock.isEmpty { | |
| return ipBlocks.joined(separator: divider) + (ipBlocks.count <= 3 ? divider : "") | |
| } | |
| return String(text.dropLast()) | |
| } | |
| var addingBlock = "" | |
| if lastBlock.count < 3 { | |
| if number > 25 { | |
| addingBlock = lastBlock + (ipBlocks.count < 3 ? divider : "") | |
| } else { | |
| addingBlock = lastBlock | |
| } | |
| } else { | |
| if number <= 255 { | |
| addingBlock = lastBlock + (ipBlocks.count < 3 ? divider : "") | |
| } else { | |
| let additionalSize = lastBlock.count > 3 ? 3 : 2 | |
| addingBlock = "\(lastBlock.prefix(additionalSize))" | |
| if ipBlocks.count < 3 { | |
| let addedDigit = lastBlock.suffix( lastBlock.count - additionalSize ) | |
| addingBlock += "\(divider)\(addedDigit)" | |
| } | |
| } | |
| } | |
| return ipBlocks.joined(separator: divider) | |
| .appending(ipBlocks.count != 0 ? divider : "") | |
| .appending(addingBlock) | |
| } |
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