libnovel/ios/LibNovel/LibNovel/Extensions/String+App.swift

import Foundation

// MARK: - String helpers for display purposes

extension String {
    /// Strips trailing relative-date suffixes (e.g. "2 years ago", "3 days ago",
    /// or "(One)4 years ago" where the number is attached without a preceding space).
    func strippingTrailingDate() -> String {
        let units = ["second", "minute", "hour", "day", "week", "month", "year"]
        let lower = self.lowercased()
        for unit in units {
            for suffix in [unit + "s ago", unit + " ago"] {
                guard let suffixRange = lower.range(of: suffix, options: .backwards) else { continue }
                // Everything before the suffix
                let before = String(self[self.startIndex ..< suffixRange.lowerBound])
                let trimmed = before.trimmingCharacters(in: .whitespaces)
                // Strip trailing digits (the numeric count, which may be attached without a space)
                var result = trimmed
                while let last = result.last, last.isNumber {
                    result.removeLast()
                }
                result = result.trimmingCharacters(in: .whitespaces)
                if result != trimmed {
                    // We actually stripped some digits — return cleaned result
                    return result
                }
                // Fallback: number preceded by space
                if let spaceIdx = trimmed.lastIndex(of: " ") {
                    let potentialNum = String(trimmed[trimmed.index(after: spaceIdx)...])
                    if Int(potentialNum) != nil {
                        return String(trimmed[trimmed.startIndex ..< spaceIdx])
                            .trimmingCharacters(in: .whitespaces)
                    }
                } else if Int(trimmed) != nil {
                    return ""
                }
            }
        }
        return self
    }
}