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IOS-6610 IOS-7064 Add a mechanism for automatic indexation of wallets (…
…#3814) Co-authored-by: Andrey Chukavin <[email protected]>
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111 changes: 111 additions & 0 deletions
111
Tangem/App/Services/UserWalletNameIndexationHelper/UserWalletNameIndexationHelper.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| // | ||
| // UserWalletNameIndexationHelper.swift | ||
| // Tangem | ||
| // | ||
| // Created by Andrey Chukavin on 17.05.2024. | ||
| // Copyright © 2024 Tangem AG. All rights reserved. | ||
| // | ||
|
|
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| import Foundation | ||
|
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| final class UserWalletNameIndexationHelper { | ||
| private var existingNames: Set<String> | ||
|
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| private init(existingNames: [String]) { | ||
| self.existingNames = Set(existingNames).filter { NameComponents(from: $0) != nil } | ||
| } | ||
|
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| static func migratedWallets<T: NameableWallet>(_ wallets: [T]) -> [T]? { | ||
| var wallets = wallets | ||
| let helper = UserWalletNameIndexationHelper(existingNames: wallets.map(\.name)) | ||
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| var didChangeNames = false | ||
| for (index, wallet) in wallets.enumerated() { | ||
| let suggestedName = helper.suggestedName(for: wallet.name) | ||
| if wallet.name != suggestedName { | ||
| var wallet = wallet | ||
| wallet.name = suggestedName | ||
| wallets[index] = wallet | ||
| didChangeNames = true | ||
| } | ||
| } | ||
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| return didChangeNames ? wallets : nil | ||
| } | ||
|
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| static func suggestedName(_ rawName: String, names: [String]) -> String { | ||
| if NameComponents(from: rawName) != nil { | ||
| return rawName | ||
| } | ||
|
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| let indicesByNameTemplate = names.reduce(into: [String: Set<Int>]()) { dict, name in | ||
| guard let nameComponents = NameComponents(from: name) else { | ||
| dict[name, default: []].insert(1) | ||
| return | ||
| } | ||
|
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| dict[nameComponents.template, default: []].insert(nameComponents.index) | ||
| } | ||
|
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| let nameTemplate = rawName.trimmingCharacters(in: .whitespaces) | ||
| let nameIndex = indicesByNameTemplate.nextIndex(for: nameTemplate) | ||
|
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| if nameIndex == 1 { | ||
| return nameTemplate | ||
| } else { | ||
| return "\(nameTemplate) \(nameIndex)" | ||
| } | ||
| } | ||
|
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| private func suggestedName(for rawName: String) -> String { | ||
| let name = Self.suggestedName(rawName, names: Array(existingNames)) | ||
| existingNames.insert(name) | ||
| return name | ||
| } | ||
| } | ||
|
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| private extension UserWalletNameIndexationHelper { | ||
| struct NameComponents { | ||
| static let nameComponentsRegex = try! NSRegularExpression(pattern: "^(.+)(\\s+\\d+)$") | ||
|
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| let template: String | ||
| let index: Int | ||
|
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| init?(from rawName: String) { | ||
| let name = rawName.trimmingCharacters(in: .whitespaces) | ||
| let range = NSRange(location: 0, length: name.count) | ||
|
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| guard | ||
| let match = Self.nameComponentsRegex.matches(in: name, range: range).first, | ||
| match.numberOfRanges == 3, | ||
| let templateRange = Range(match.range(at: 1), in: name), | ||
| let indexRange = Range(match.range(at: 2), in: name), | ||
| let index = Int(String(name[indexRange]).trimmingCharacters(in: .whitespaces)) | ||
| else { | ||
| return nil | ||
| } | ||
|
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| template = String(name[templateRange]) | ||
| self.index = index | ||
| } | ||
| } | ||
| } | ||
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| private extension [String: Set<Int>] { | ||
| func nextIndex(for nameTemplate: String) -> Int { | ||
| let indices = self[nameTemplate, default: []] | ||
|
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| if indices.isEmpty { | ||
| return 1 | ||
| } | ||
|
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| for i in 1 ... indices.count { | ||
| if !indices.contains(i) { | ||
| return i | ||
| } | ||
| } | ||
|
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| let defaultIndex = indices.count + 1 | ||
| return defaultIndex | ||
| } | ||
| } |
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