5dplomacy/MultiversalDiplomacy/Model/Regex.cs

178 lines
6.4 KiB
C#

using System.Diagnostics.CodeAnalysis;
using System.Text.RegularExpressions;
using MultiversalDiplomacy.Orders;
namespace MultiversalDiplomacy.Model;
/// <summary>
/// This class defines the regular expressions that are used to build up larger expressions for matching orders
/// and other script inputs. It also provides helper functions to extract the captured order elements as tuples,
/// which function as the structured intermediate representation between raw user input and full Order objects.
/// </summary>
public class OrderRegex(World world)
{
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}-)?{world.Map.ProvinceRegex}(?:{SlashLocation}|{ParenLocation})?(?:@{Turn})?";
public string UnitSpec => $"(?:{Type} )?{FullLocation}";
public const string HoldVerb = "(h|hold|holds)";
public const string MoveVerb = "(-|(?:->)|(?:=>)|(?:attack(?:s)?)|(?:move(?:s)?(?: to)?))";
public const string SupportVerb = "(s|support|supports)";
public const string ViaConvoy = "(convoy|via convoy|by convoy)";
public Regex Hold => new(
$"^{UnitSpec} {HoldVerb}$",
RegexOptions.IgnoreCase);
public static (
string type,
string timeline,
string province,
string location,
string turn,
string holdVerb)
ParseHold(Match match) => (
match.Groups[1].Value,
match.Groups[2].Value,
match.Groups[3].Value,
match.Groups[4].Length > 0
? match.Groups[4].Value
: match.Groups[5].Value,
match.Groups[6].Value,
match.Groups[7].Value);
public Regex Move => new(
$"^{UnitSpec} {MoveVerb} {FullLocation}(?: {ViaConvoy})?$",
RegexOptions.IgnoreCase);
public static (
string type,
string timeline,
string province,
string location,
string turn,
string moveVerb,
string destTimeline,
string destProvince,
string destLocation,
string destTurn,
string viaConvoy)
ParseMove(Match match) => (
match.Groups[1].Value,
match.Groups[2].Value,
match.Groups[3].Value,
match.Groups[4].Length > 0
? match.Groups[4].Value
: match.Groups[5].Value,
match.Groups[6].Value,
match.Groups[7].Value,
match.Groups[8].Value,
match.Groups[9].Value,
match.Groups[10].Length > 0
? match.Groups[10].Value
: match.Groups[11].Value,
match.Groups[12].Value,
match.Groups[13].Value);
public Regex SupportHold => new(
$"^{UnitSpec} {SupportVerb} {UnitSpec}$",
RegexOptions.IgnoreCase);
public static (
string type,
string timeline,
string province,
string location,
string turn,
string supportVerb,
string targetType,
string targetTimeline,
string targetProvince,
string targetLocation,
string targetTurn)
ParseSupportHold(Match match) => (
match.Groups[1].Value,
match.Groups[2].Value,
match.Groups[3].Value,
match.Groups[4].Length > 0
? match.Groups[4].Value
: 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 > 0
? match.Groups[11].Value
: match.Groups[12].Value,
match.Groups[13].Value);
public static bool TryParseUnit(World world, string unitSpec, [NotNullWhen(true)] out Unit? newUnit)
{
newUnit = null;
Regex reUnit = new(
$"^{world.Map.PowerRegex} {Type} {world.Map.ProvinceRegex}(?:{SlashLocation}|{ParenLocation})?$");
Match match = reUnit.Match(unitSpec);
if (!match.Success) {
Console.WriteLine($"Could not match unit spec \"{unitSpec}\"");
return false;
}
string power = world.Map.Powers.First(p => p.EqualsAnyCase(match.Groups[1].Value));
string typeName = Enum.GetNames<UnitType>().First(name => name.StartsWithAnyCase(match.Groups[2].Value));
UnitType type = Enum.Parse<UnitType>(typeName);
Province province = world.Map.Provinces.First(prov
=> prov.Name.EqualsAnyCase(match.Groups[3].Value)
|| prov.Abbreviations.Any(abv => abv.EqualsAnyCase(match.Groups[3].Value)));
string locationName = match.Groups[4].Length > 0 ? match.Groups[4].Value : match.Groups[5].Value;
Location location = province.Locations.First(loc
=> loc.Name.StartsWithAnyCase(locationName)
|| loc.Abbreviation.StartsWithAnyCase(locationName));
newUnit = Unit.Build(location.Key, Season.First, power, type);
return true;
}
public static bool TryParseOrder(World world, string power, string command, out Order? order) {
order = null;
OrderRegex re = new(world);
Match match;
if ((match = re.Hold.Match(command)).Success) {
var hold = ParseHold(match);
Unit unit = world.Units.First(unit
=> world.Map.GetLocation(unit.Location).ProvinceName == hold.province
&& unit.Season.Timeline == (hold.timeline.Length > 0 ? hold.timeline : "a")
&& unit.Season.Turn.ToString() == (hold.turn.Length > 0 ? hold.turn : "0"));
order = new HoldOrder(power, unit);
return true;
} else if ((match = re.Move.Match(command)).Success) {
var move = ParseMove(match);
Unit unit = world.Units.First(unit
=> world.Map.GetLocation(unit.Location).ProvinceName == move.province
&& unit.Season.Timeline == (move.timeline.Length > 0 ? move.timeline : "a")
&& unit.Season.Turn.ToString() == (move.turn.Length > 0 ? move.turn : "0"));
order = new MoveOrder(power, unit, Season.First, "l");
return true;
}
return false;
}
}