60 lines
1.7 KiB
Swift
60 lines
1.7 KiB
Swift
/*
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Copyright 2019 New Vector Ltd
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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import UIKit
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/// Generate a user name color from user id
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@objcMembers
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final class UserNameColorGenerator: NSObject {
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// MARK: - Properties
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/// User name colors.
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var userNameColors: [UIColor] = []
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/// Fallback color when `userNameColors` is empty.
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var defaultColor: UIColor = .black
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// MARK: - Public
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/// Generate a user name color from the user ID.
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///
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/// - Parameter userId: The user ID of the user.
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/// - Returns: A color associated to the user ID.
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func color(from userId: String) -> UIColor {
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guard self.userNameColors.isEmpty == false else {
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return self.defaultColor
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}
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guard userId.isEmpty == false else {
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return self.userNameColors[0]
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}
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let senderNameColorIndex = Int(userId.vc_hashCode % Int32(self.userNameColors.count))
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return self.userNameColors[senderNameColorIndex]
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}
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}
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// MARK: - Themable
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extension UserNameColorGenerator: Themable {
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func update(theme: Theme) {
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self.defaultColor = theme.colors.primaryContent
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self.userNameColors = theme.colors.namesAndAvatars
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}
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}
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