ios-mail/Modules/InboxCore/Sources/RangeReplaceableCollection.swift

// Copyright (c) 2025 Proton Technologies AG
//
// This file is part of Proton Mail.
//
// Proton Mail is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Proton Mail is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Proton Mail. If not, see https://www.gnu.org/licenses/.

public extension RangeReplaceableCollection where Element: Equatable {
    func removing(_ item: Element) -> Self {
        var copy = self
        if let index = copy.firstIndex(of: item) {
            copy.remove(at: index)
        }
        return copy
    }

    func inserting(_ item: Element, at index: Index) -> Self {
        var copy = self
        copy.insert(item, at: index)
        return copy
    }

    func appending(_ item: Element) -> Self {
        var copy = self
        copy.append(item)
        return copy
    }
}