80 lines
2.6 KiB
C#
80 lines
2.6 KiB
C#
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namespace EbayListingTool.Helpers;
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public static class NumberWords
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{
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private static readonly string[] Ones =
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[
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"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
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"ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen",
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"seventeen", "eighteen", "nineteen"
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];
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private static readonly string[] Tens =
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[
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"", "", "twenty", "thirty", "forty", "fifty",
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"sixty", "seventy", "eighty", "ninety"
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];
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/// <summary>
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/// Converts a price to a friendly verbal string.
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/// £17.49 → "about seventeen pounds"
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/// £17.50 → "about seventeen pounds fifty"
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/// £0.50 → "fifty pence"
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/// </summary>
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public static string ToVerbalPrice(decimal price)
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{
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if (price <= 0) return "no price set";
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// Snap to nearest 50p
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var rounded = Math.Round(price * 2) / 2m;
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int pounds = (int)rounded;
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bool hasFifty = (rounded - pounds) >= 0.5m;
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if (pounds == 0)
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return "fifty pence";
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var poundsWord = IntToWords(pounds);
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var poundsLabel = pounds == 1 ? "pound" : "pounds";
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var suffix = hasFifty ? " fifty" : "";
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return $"about {poundsWord} {poundsLabel}{suffix}";
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}
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/// <summary>
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/// Converts a UTC DateTime to a human-friendly relative string.
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/// </summary>
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public static string ToRelativeDate(DateTime utcTime)
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{
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var diff = DateTime.UtcNow - utcTime;
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if (diff.TotalSeconds < 60) return "just now";
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if (diff.TotalMinutes < 60) return $"{(int)diff.TotalMinutes} minutes ago";
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if (diff.TotalHours < 2) return "about an hour ago";
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if (diff.TotalHours < 24) return $"{(int)diff.TotalHours} hours ago";
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if (diff.TotalDays < 2) return "yesterday";
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if (diff.TotalDays < 7) return $"{(int)diff.TotalDays} days ago";
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if (diff.TotalDays < 14) return "last week";
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if (diff.TotalDays < 30) return $"{(int)(diff.TotalDays / 7)} weeks ago";
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if (diff.TotalDays < 60) return "last month";
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return $"{(int)(diff.TotalDays / 30)} months ago";
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}
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private static string IntToWords(int n)
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{
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if (n < 20) return Ones[n];
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if (n < 100)
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{
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var t = Tens[n / 10];
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var o = n % 10;
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return o == 0 ? t : $"{t}-{Ones[o]}";
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}
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if (n < 1000)
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{
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var h = Ones[n / 100];
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var rest = n % 100;
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return rest == 0 ? $"{h} hundred" : $"{h} hundred and {IntToWords(rest)}";
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}
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return n.ToString(); // fallback for very large prices
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}
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}
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