41 lines
1.3 KiB
Swift
41 lines
1.3 KiB
Swift
/*
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* Copyright 2022 The Yorkie Authors. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import Foundation
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extension String {
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func substring(from: Int, to: Int) -> String {
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guard from <= to, from < self.count else {
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return ""
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}
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let adaptedTo = min(to, self.count - 1)
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let start = index(self.startIndex, offsetBy: from)
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let end = index(self.startIndex, offsetBy: adaptedTo)
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let range = start ... end
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return String(self[range])
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}
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var toDocKey: String {
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let lower = self.lowercased()
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let regex = try? NSRegularExpression(pattern: "[^a-z0-9-]")
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return regex?.stringByReplacingMatches(in: lower, options: [], range: NSRange(0 ..< lower.count), withTemplate: "-").substring(from: 0, to: 120) ?? ""
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}
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}
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