5dplomacy/MultiversalDiplomacy/Model/Regex.cs

using System.Text.RegularExpressions;

namespace MultiversalDiplomacy.Model;

public class OrderRegex(World world)
{
    static IEnumerable<string> AllProvinceNames(Province prov) => prov.Abbreviations.Append(prov.Name);

    public string Power = $"({string.Join("|", world.Powers)})";

    public string Province = $"({string.Join("|", world.Provinces.SelectMany(AllProvinceNames))})";

    public const string Type = "(A|F|Army|Fleet)";

    public const string Timeline = "([A-Za-z]+)";

    public const string Turn = "([0-9]+)";

    public const string SlashLocation = "(?:/([A-Za-z]+))";

    public const string ParenLocation = "(?:\\(([A-Za-z ]+)\\))";

    public string FullLocation => $"(?:{Timeline}-)?{Province}(?:{SlashLocation}|{ParenLocation})?(?:@{Turn})?";

    public string Unit => $"(?:(?:{Power} )?{Type} )?{FullLocation}";

    public const string HoldVerb = "(h|hold|holds)";

    public const string MoveVerb = "(-|(?:->)|(?:=>)|(?:attack(?:s)?)|(?:move(?:s)?(?: to)?))";

    public const string ViaConvoy = "(convoy|via convoy|by convoy)";

    public Regex Hold => new($"^{Unit} {HoldVerb}$");

    public static (
        string power,
        string type,
        string timeline,
        string province,
        string location,
        string turn,
        string verb)
        ParseHold(Match match)
            => (match.Groups[1].Value,
                match.Groups[2].Value,
                match.Groups[3].Value,
                match.Groups[4].Value,
                match.Groups[5].Length > 0
                    ? match.Groups[5].Value
                    : match.Groups[6].Value,
                match.Groups[7].Value,
                match.Groups[8].Value);

    public Regex Move => new($"^{Unit} {MoveVerb} {FullLocation}$(?: {ViaConvoy})?");

    public static (
        string power,
        string type,
        string timeline,
        string province,
        string location,
        string turn,
        string verb,
        string timeline2,
        string province2,
        string location2,
        string turn2,
        string viaConvoy)
        ParseMove(Match match)
            => (match.Groups[1].Value,
                match.Groups[2].Value,
                match.Groups[3].Value,
                match.Groups[4].Value,
                match.Groups[5].Length > 0
                    ? match.Groups[5].Value
                    : match.Groups[6].Value,
                match.Groups[7].Value,
                match.Groups[8].Value,
                match.Groups[9].Value,
                match.Groups[10].Value,
                match.Groups[11].Length > 1
                    ? match.Groups[11].Value
                    : match.Groups[12].Value,
                match.Groups[13].Value,
                match.Groups[14].Value);
}