Add LoadSystemFromJson to StarSystemFactory, entire system can now be…

… loaded from json

Pulsar4X/GameEngine/Data/basemod/sol/sol.json

@@ -0,0 +1,13 @@
+{
+  "name": "Sol",
+  "info": {
+    "mass": 1.98855E30,
+    "radius": 696342,
+    "age": 4.6E9,
+    "class": "G",
+    "temperature": 5778,
+    "luminosity": 1,
+    "luminosityClass": "V",
+    "spectralType": "G"
+  }
+}

Pulsar4X/GameEngine/Data/basemod/sol/systemInfo.json

@@ -0,0 +1,39 @@
+{
+  "name": "Sol",
+  "stars": [
+    "sol.json"
+  ],
+  "bodies": [
+    "mercury.json",
+    "venus.json",
+    "earth.json",
+    "mars.json",
+    "jupiter/jupiter.json",
+    "saturn/saturn.json",
+    "uranus.json",
+    "neptune.json",
+    "ceres.json",
+    "eris.json",
+    "halleyscomet.json",
+    "haumea.json",
+    "luna.json",
+    "makemake.json",
+    "pluto.json",
+    "jupiter/01-io.json",
+    "jupiter/02-europa.json",
+    "jupiter/03-ganymede.json",
+    "jupiter/04-callisto.json",
+    "jupiter/amalthea.json",
+    "jupiter/elara.json",
+    "jupiter/himalia.json",
+    "jupiter/lysithea.json",
+    "jupiter/pasiphae.json",
+    "jupiter/sinope.json",
+    "saturn/dione.json",
+    "saturn/enceladus.json",
+    "saturn/mimas.json",
+    "saturn/rhea.json",
+    "saturn/tethys.json",
+    "saturn/titan.json"
+  ]
+}

Pulsar4X/GameEngine/Engine/Factories/DefaultStartFactory.cs

@@ -155,7 +155,7 @@ public static Entity DefaultHumans(Game game, string name)
 
             //var log = StaticRefLib.EventLog;
             StarSystemFactory starfac = new StarSystemFactory(game);
-            StarSystem solSys = starfac.CreateSol(game);
+            StarSystem solSys = starfac.LoadSystemFromJson(game, "Data/basemod/sol/");
             //sol.ManagerSubpulses.Init(sol);
             Entity solStar = solSys.GetAllEntitiesWithDataBlob<StarInfoDB>().First();
             Entity earth = NameLookup.GetFirstEntityWithName(solSys, "Earth"); //should be fourth entity created

Pulsar4X/GameEngine/Engine/Factories/StarSystemFactory.cs

@@ -9,6 +9,8 @@
 using Pulsar4X.Engine.Sensors;
 using Pulsar4X.Engine.Sol;
 using Pulsar4X.Engine.Factories;
+using System.IO;
+using Newtonsoft.Json.Linq;
 
 namespace Pulsar4X.Engine
 {
@@ -194,7 +196,7 @@ public StarSystem CreateSol(Game game)
             // WIP Function...
             StarSystem sol = new StarSystem();
             sol.Initialize(game, "Sol", -1);
-            Entity sun = _starFactory.CreateStar(sol, UniversalConstants.Units.SolarMassInKG, UniversalConstants.Units.SolarRadiusInAu, 4.6E9, "G", 5778, 1, SpectralType.G, "Sol");
+            var sun = StarFromJsonFactory.Create(sol, GalaxyGen.Settings, "Data/basemod/bodies/sol.json");
 
             // Planets and their moons
             var mercury = SystemBodyFromJsonFactory.Create(game, sol, sun, GalaxyGen.Settings.J2000, new SensorProfileDB(), "Data/basemod/bodies/mercury.json");
@@ -304,6 +306,55 @@ public StarSystem CreateSol(Game game)
             return sol;
         }
 
+        public StarSystem LoadSystemFromJson(Game game, string folder)
+        {
+            string fileContents = File.ReadAllText(Path.Combine(folder, "systemInfo.json"));
+            var rootJson = JObject.Parse(fileContents);
+            var systemName = rootJson["name"].ToString();
+            var rngSeed = (int?)rootJson["seed"] ?? -1;
+
+            StarSystem system = new StarSystem();
+            system.Initialize(game, systemName, rngSeed);
+
+            var stars = (JArray?)rootJson["stars"];
+            Entity? rootStar = null;
+            foreach(var starFileName in stars)
+            {
+                var star = StarFromJsonFactory.Create(system, GalaxyGen.Settings, Path.Combine(folder, starFileName.ToString()));
+                if(rootStar == null)
+                    rootStar = star;
+            }
+
+            if(rootStar != null)
+            {
+                var bodies = (JArray?)rootJson["bodies"];
+                foreach(var bodyFileName in bodies)
+                {
+                    var body = SystemBodyFromJsonFactory.Create(
+                        game,
+                        system,
+                        rootStar,
+                        GalaxyGen.Settings.J2000,
+                        new SensorProfileDB(),
+                        Path.Combine(folder, bodyFileName.ToString()));
+                    _systemBodyFactory.MineralGeneration(game.StartingGameData.Minerals.Values.ToList(), system, body);
+                }
+            }
+
+            JPSurveyFactory.GenerateJPSurveyPoints(system);
+
+            // Go through all the created entities and set them to be neutral
+            foreach(var entity in system.GetAllEntites())
+            {
+                entity.FactionOwnerID = Game.NeutralFactionId;
+            }
+
+            game.GameMasterFaction.GetDataBlob<FactionInfoDB>().KnownSystems.Add(system.Guid);
+
+            return system;
+        }
+
+
         #region TestSystems
 
         /// <summary>