Implement regex order parsing in game script handler

MultiversalDiplomacy/Model/Regex.cs

@@ -28,6 +28,8 @@ public class OrderRegex(World world)
 
     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 (
@@ -49,7 +51,7 @@ public class OrderRegex(World world)
                 match.Groups[7].Value,
                 match.Groups[8].Value);
 
-    public Regex Move => new($"^{Unit} {MoveVerb} {FullLocation}$");
+    public Regex Move => new($"^{Unit} {MoveVerb} {FullLocation}$(?: {ViaConvoy})?");
 
     public static (
         string power,
@@ -62,7 +64,8 @@ public class OrderRegex(World world)
         string timeline2,
         string province2,
         string location2,
-        string turn2)
+        string turn2,
+        string viaConvoy)
         ParseMove(Match match)
             => (match.Groups[1].Value,
                 match.Groups[2].Value,
@@ -78,5 +81,6 @@ public class OrderRegex(World world)
                 match.Groups[11].Length > 1
                     ? match.Groups[11].Value
                     : match.Groups[12].Value,
-                match.Groups[13].Value);
+                match.Groups[13].Value,
+                match.Groups[14].Value);
 }

MultiversalDiplomacy/Script/GameScriptHandler.cs

@@ -1,10 +1,13 @@
+using System.Text.RegularExpressions;
+
 using MultiversalDiplomacy.Model;
+using MultiversalDiplomacy.Orders;
 
 namespace MultiversalDiplomacy.Script;
 
 public class GameScriptHandler(World world, bool strict = false) : IScriptHandler
 {
-    public string Prompt => "game> ";
+    public string Prompt => "orders> ";
 
     public World World { get; private set; } = world;
 
@@ -22,7 +25,7 @@ public class GameScriptHandler(World world, bool strict = false) : IScriptHandle
             return this;
         }
 
-        // --- submits the orders for validation to allow for assertions about it
+        // "---" submits the orders for validation to allow for assertions about it
         if (input == "---") {
             // TODO submit orders
             // TODO return a new handler that handles asserts
@@ -34,10 +37,41 @@ public class GameScriptHandler(World world, bool strict = false) : IScriptHandle
             return this;
         }
 
-        // TODO parse order, including "{power} {order}" for one-offs
+        if (TryParseOrder(input, out Order? order)) {
+            Console.WriteLine($"Parsed order \"{input}\" but doing anything with it isn't implemented yet");
+        } else if (Strict) {
+            return null;
+        }
 
         Console.WriteLine($"{CurrentPower}: {input}");
 
         return this;
     }
+
+    private bool TryParseOrder(string input, out Order? order) {
+        order = null;
+        OrderRegex re = new(World);
+        Match match;
+        if ((match = re.Hold.Match(input)).Success) {
+            var hold = OrderRegex.ParseHold(match);
+            string power = hold.power.Length > 0 ? hold.power : CurrentPower ?? hold.power;
+            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(input)).Success) {
+            var move = OrderRegex.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(move.power, unit, Season.First, "l");
+            return true;
+        }       
+
+        Console.WriteLine($"Failed to parse \"{input}\"");
+        return false;
+    }
 }

MultiversalDiplomacy/Script/SetupScriptHandler.cs

@@ -1,7 +1,10 @@
 using System.Diagnostics.CodeAnalysis;
+using System.Text.RegularExpressions;
 
 using MultiversalDiplomacy.Model;
 
+using static MultiversalDiplomacy.Model.OrderRegex;
+
 namespace MultiversalDiplomacy.Script;
 
 /// <summary>
@@ -9,7 +12,7 @@ namespace MultiversalDiplomacy.Script;
 /// </summary>
 public class SetupScriptHandler(World world, bool strict = false) : IScriptHandler
 {
-    public string Prompt => "5dp> ";
+    public string Prompt => "setup> ";
 
     public World World { get; private set; } = world;
 
@@ -66,18 +69,15 @@ public class SetupScriptHandler(World world, bool strict = false) : IScriptHandl
                 break;
 
             case "option" when args.Length < 3:
-                throw new NotImplementedException();
+                throw new NotImplementedException("There are no supported options yet");
 
-            case "unit" when args.Length < 4:
+            case "unit" when args.Length < 2:
-                Console.WriteLine("usage: unit [power] [type] [province] <location>");
+                Console.WriteLine("usage: unit [power] [type] [province]</location>");
                 break;
 
             case "unit":
-                string power = args[1];
+                string unitSpec = input["unit ".Length..];
-                string type = args[2];
+                if (TryParseUnit(unitSpec, out Unit? newUnit)) {
-                string province = args[3];
-                string? location = args.Length >= 5 ? args[4] : null;
-                if (ParseUnit(power, type, province, location, out Unit? newUnit)) {
                     World = World.Update(units: World.Units.Append(newUnit));
                     Console.WriteLine($"Created {newUnit}");
                 } else if (Strict) {
@@ -96,80 +96,33 @@ public class SetupScriptHandler(World world, bool strict = false) : IScriptHandl
         return this;
     }
 
-    private bool ParseUnit(
+    private bool TryParseUnit(string unitSpec, [NotNullWhen(true)] out Unit? newUnit)
-        string powerArg,
-        string typeArg,
-        string provinceArg,
-        string? locationArg,
-        [NotNullWhen(true)] out Unit? newUnit)
     {
         newUnit = null;
 
-        // Parse the power name by substring matching.
+        OrderRegex re = new(World);
-        var matchingPowers = World.Powers.Where(p => p.StartsWithAnyCase(powerArg));
+        Regex reUnit = new($"^{re.Power} {OrderRegex.Type} {re.Province}(?:{SlashLocation}|{ParenLocation})?$");
-        if (!matchingPowers.Any())
+        Match match = reUnit.Match(unitSpec);
-        {
+        if (!match.Success) {
-            Console.WriteLine($"No power named \"{powerArg}\"");
+            Console.WriteLine($"Could not match unit spec \"{unitSpec}\"");
             return false;
         }
-        if (matchingPowers.Count() > 1)
-        {
-            Console.WriteLine($"Ambiguous power \"{powerArg}\" between {string.Join(", ", matchingPowers)}");
-            return false;
-        }
-        string power = matchingPowers.First();
 
-        // Parse the unit type by substring matching.
+        string power = World.Powers.First(p => p.EqualsAnyCase(match.Groups[1].Value));
-        var matchingTypes = Enum.GetNames<UnitType>().Where(t => t.StartsWithAnyCase(typeArg));
-        if (!matchingTypes.Any())
-        {
-            Console.WriteLine($"No unit type \"{typeArg}\"");
-            return false;
-        }
-        if (matchingTypes.Count() > 1)
-        {
-            Console.WriteLine($"Ambiguous unit type \"{typeArg}\" between {string.Join(", ", matchingTypes)}");
-            return false;
-        }
-        UnitType type = Enum.Parse<UnitType>(matchingTypes.First());
 
-        // Parse the province by matching the province name or one of its abbreviations,
+        string typeName = Enum.GetNames<UnitType>().First(name => name.StartsWithAnyCase(match.Groups[2].Value));
-        // allowing location specifications separated by a forward slash, e.g. spa/nc.
+        UnitType type = Enum.Parse<UnitType>(typeName);
-        if (provinceArg.Contains('/')) {
-            var split = provinceArg.Split('/', 2);
-            locationArg ??= split[1];
-            provinceArg = split[0];
-        }
-        var matchingProvs = World.Provinces.Where(pr
-            => pr.Abbreviations.Any(abv => abv.EqualsAnyCase(provinceArg))
-            || pr.Name.EqualsAnyCase(provinceArg));
-        if (!matchingProvs.Any())
-        {
-            Console.WriteLine($"No province matches \"{provinceArg}\"");
-            return false;
-        }
-        if (matchingProvs.Count() > 1)
-        {
-            Console.WriteLine($"Ambiguous province \"{provinceArg}\" between {string.Join(", ", matchingProvs)}");
-            return false;
-        }
-        Province province = matchingProvs.First();
-        Location location;
-        locationArg ??=  type == UnitType.Army ? "land" : "water";
-        var matchingLocs = locationArg is null
-            ? province.Locations.Where(loc
-                => type == UnitType.Army && loc.Type == LocationType.Land
-                || type == UnitType.Fleet && loc.Type == LocationType.Water)
-            : province.Locations.Where(loc
-                => loc.Name.EqualsAnyCase(locationArg)
-                || loc.Abbreviation.EqualsAnyCase(locationArg));
-        if (!matchingLocs.Any()) {
-            Console.WriteLine($"Province {province.Name} has no {locationArg} location");
-            return false;
-        }
-        location = matchingLocs.First();
 
-        newUnit = Unit.Build(location.Key, Season.First, powerArg, type);
+        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;
     }
 }