move towards auto-import

Stars Assistant/CSV/PlanetLoader.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using CsvHelper.Configuration;
+using CsvHelper;
+using System.Globalization;
+using Splat;
+
+namespace StarsAssistant.CSV;
+
+public class PlanetLoader
+{
+    /// <summary>
+    /// Reference to the game metadata, retrieved by DI
+    /// </summary>
+    protected Services.Game Game = Locator.Current.GetService<Services.Game>()!;
+
+    /// <summary>
+    /// CSV Configuration to use for importing Planet files.
+    /// </summary>
+    protected CsvConfiguration CsvConfig;
+
+    /// <summary>
+    /// Construction
+    /// </summary>
+    public PlanetLoader()
+    {
+        CreateConfig();
+    }
+
+    /// <summary>
+    /// Creates the CSV configuration for planets.
+    /// </summary>
+    [MemberNotNull(nameof(CsvConfig))]
+    protected void CreateConfig() 
+    {
+        CsvConfig = CsvConfiguration.FromAttributes<Planet>(CultureInfo.InvariantCulture);
+        CsvConfig.Delimiter = "\t";
+        CsvConfig.Escape = '\0';
+        CsvConfig.MissingFieldFound = null;
+    }
+
+    /// <summary>
+    /// Import the planet file for the given Race.
+    /// </summary>
+    /// <param name="race">Import File</param>
+    public void ImportForRace(Model.Race race)
+    {
+        using (var db = Locator.Current.GetService<Model.StarsDatabase>()!)
+        using (var reader = new StreamReader(Game.PlanetFileForRace(race), System.Text.Encoding.Latin1))
+        using (var csv = new CsvReader(reader, CsvConfig))
+        {
+            List<CSV.Planet> records = csv.GetRecords<Planet>().ToList();
+            var planetByPlayer = from csvp in records
+                group csvp by csvp.Owner into byOwners
+                select byOwners;
+
+            foreach (var owner in planetByPlayer)
+            {
+                Model.Race? r;
+                if (owner.Key == race.Name)
+                {
+                    r = race;
+                }
+                else
+                {
+                    r = db.Race.Find(owner.Key);
+                    if (r == null)
+                    {
+                        r = new()
+                        {
+                            Name = owner.Key
+                        };
+                        db.Add(r);
+                    }
+                }
+
+                foreach (Planet csvp in owner)
+                {
+                    Model.Planet p = new Model.Planet{ Name = csvp.Name };
+                    csvp.UpdateDbPlanet(p);
+                    db.Add(p);
+                }
+                db.SaveChanges();
+            }
+        }
+    }
+}

Stars Assistant/Helpers/RxExtensions.cs

@@ -35,4 +35,23 @@ public static class RxExtensions
         return src.Buffer(zeroCrossings);
     }
 
+    /// <summary>
+    /// Throttle a FileSystemObserver and eliminate all duplicates.
+    /// </summary>
+    /// <remarks>
+    /// Curtesy of https://endjin.com/blog/2024/05/observe-file-system-changes-with-rx-dotnet
+    /// </remarks>
+    /// <param name="watcher">An observer created with <c>ObserveFileSystem</c></param>
+    /// <param name="inactivitySeconds">Throttling window, defaults to 1 second.</param>
+    /// <param name="scheduler">Scheduler to user for throttling, default is set by <c>Quiescent</c></param>
+    /// <returns>A throttled observer with duplicate elimination.</returns>
+    public static IObservable<IEnumerable<FileSystemEventArgs>> ThrottleAndDistinct (
+        this IObservable<FileSystemEventArgs> watcher, 
+        int inactivitySeconds = 1,
+        IScheduler? scheduler = null)
+    {
+        return watcher
+                .Quiescent(TimeSpan.FromSeconds(inactivitySeconds), scheduler)
+                .Select(changes => changes.DistinctBy(x => (x.ChangeType, x.FullPath)));
+    }
 }

Stars Assistant/Model/Game.cs

@@ -1,34 +0,0 @@
-using System.ComponentModel.DataAnnotations;
-using System.Globalization;
-
-namespace StarsAssistant.Model;
-
-public class Game (string gamePath, string baseName)
-{
-    /// <summary>
-    /// The base path in which all game files reside.
-    /// </summary>
-    public string GamePath { get; private set; } = gamePath;
-
-    /// <summary>
-    /// The base name without extensions of your game, inside the GamePath folder.
-    /// All dependant files are resolved using this name.
-    /// </summary>
-    public string BaseName { get; private set; } = baseName;
-
-    /// <summary>
-    /// The number of the player, for example identifying the pxx planet file.
-    /// </summary>
-    public int PlayerId { get; private set; }
-
-    /// <summary>
-    /// Combine into the DatabaseName
-    /// </summary>
-    public string DatabaseName => Path.Combine(GamePath, $"{BaseName}.sqlite");
-
-    /// <summary>
-    /// Search for Planet files using this pattern, will give you all pxx files.
-    /// </summary>
-    public string PlanetFileSearchPattern => Path.Combine(GamePath, $"{BaseName}.p*");
-
-}

Stars Assistant/Model/Race.cs

@@ -22,6 +22,8 @@ public class Race
 
     public bool PlayerRace { get; set; } = false;
 
+    public int? PlayerFileId { get; set; }
+
     public int? ColonistsPerResource { get; set; }
 
     public int? GrowthRatePercent { get; set; }

Stars Assistant/Model/StarsDatabase.cs

@@ -37,7 +37,7 @@ public class StarsDatabase(string DbPath) : DbContext
     /// <summary>
     /// The record with all game metadata, will only contain a single line at all times.
     /// </summary>
-    public DbSet<Game> Game { get; set; }
+    // public DbSet<Game> Game { get; set; }
 
     #endregion
 }

Stars Assistant/Program.cs

@@ -22,10 +22,15 @@ sealed class Program
     {
         ModeDetector.OverrideModeDetector(Splat.ModeDetection.Mode.Run);
 
-        Locator.CurrentMutable.Register(
+        Services.Game g = new()
-            () => new StarsDatabase("stars.sqlite"),
+        {
-            typeof(StarsDatabase)
+            BaseName = "GOINGTH",
-        );
+            GamePath = "/home/torben/goingth/"
+        };
+
+        Locator.CurrentMutable.RegisterConstant(g, typeof(Services.Game));
+        Locator.CurrentMutable.RegisterConstant(new Services.CSVDataLoader(), typeof(Services.CSVDataLoader));
+        Locator.CurrentMutable.Register(() => new StarsDatabase(g.DatabaseFileName), typeof(StarsDatabase));
 
         __createTestData();
         
@@ -44,6 +49,7 @@ sealed class Program
 
     public static void __createTestData ()
     {
+        Services.Game game = Locator.Current.GetService<Services.Game>()!;
         using var db = Locator.Current.GetService<StarsDatabase>()!;
 
         db.Database.EnsureDeleted();
@@ -56,6 +62,7 @@ sealed class Program
         {
             Name = "Atlantis",
             PlayerRace = true,
+            PlayerFileId = 1,
             ColonistsPerResource = 1000,
             GrowthRatePercent = 19,
             PRT = PRT.Other,
@@ -72,40 +79,8 @@ sealed class Program
         db.SaveChanges();
         Race.Player = r;
 
-        var config = CsvConfiguration.FromAttributes<Planet>(CultureInfo.InvariantCulture);
+        var loader = new CSV.PlanetLoader();
-        config.Delimiter = "\t";
+        loader.ImportForRace(Race.Player);
-        config.Escape = '\0';
-        config.MissingFieldFound = null;
-
-        using (var reader = new StreamReader("/home/torben/goingth/GOINGTH.p1", System.Text.Encoding.Latin1))
-        using (var csv = new CsvReader(reader, config))
-        {
-            List<CSV.Planet> records = csv.GetRecords<CSV.Planet>().ToList();
-            var planetByPlayer = from csvp in records
-                group csvp by csvp.Owner into byOwners
-                select byOwners;
-
-            foreach (var owner in planetByPlayer)
-            {
-                if (owner.Key != "Atlantis")
-                {
-                    r = new()
-                    {
-                        Name = owner.Key
-                    };
-                    db.Add(r);
-                    db.SaveChanges();  
-                }
-
-                foreach (CSV.Planet csvp in owner)
-                {
-                    Planet p = new Planet{ Name = csvp.Name };
-                    csvp.UpdateDbPlanet(p);
-                    db.Add(p);
-                }
-                db.SaveChanges();
-            }
-        }
     }
 }
 

Stars Assistant/Services/CSVDataLoader.cs

@@ -1,7 +1,8 @@
 using System;
-using CsvHelper.Configuration;
+using System.IO;
-using CsvHelper;
+using System.Reactive.Linq;
 using Splat;
+using StarsAssistant.Helpers;
 
 namespace StarsAssistant.Services;
 
@@ -11,10 +12,30 @@ public class CSVDataLoader
     /// <summary>
     /// Reference to the game metadata, retrieved by DI
     /// </summary>
-    protected Model.Game game;
+    protected Services.Game Game = Locator.Current.GetService<Services.Game>()!;
 
-    public CSVDataLoader()
+    public void CSVDataLoader() 
     {
-        game = Locator.Current.GetService<Model.Game>()!;
+        
+    }
+
+    public void StartPlanetCSVWatcher() 
+    {
+        // TODO: which scheduler for Throttle?
+        var watcher = FsWatcher
+            .ObserveFileSystem(Game.GamePath, new string[] { Game.PlanetFileSearchPattern });
+            .ThrottleAndDistinct(2);
+        
+        /*
+        watcher.Subscribe(x => 
+        {
+            Console.WriteLine($"{DateTime.Now.ToLongTimeString()} got {x.Count()} events:");
+
+            foreach (var fsEvent in x)
+            {
+                Console.WriteLine($"{DateTime.Now.ToLongTimeString()} {i++} {fsEvent.FullPath} - {fsEvent.ChangeType}");
+            }
+        });
+        */
     }
 }   

Stars Assistant/Services/Game.cs

@@ -0,0 +1,33 @@
+namespace StarsAssistant.Services;
+
+public class Game
+{
+    /// <summary>
+    /// The base path in which all game files reside.
+    /// </summary>
+    public required string GamePath { get; set; }
+
+    /// <summary>
+    /// The base name without extensions of your game, inside the GamePath folder.
+    /// All dependant files are resolved using this name.
+    /// </summary>
+    public required string BaseName { get; set; }
+
+    /// <summary>
+    /// Combine into the DatabaseName
+    /// </summary>
+    public string DatabaseFileName => Path.Combine(GamePath, $"{BaseName}.sqlite");
+
+    /// <summary>
+    /// Search for Planet files using this pattern, will give you all pxx files.
+    /// </summary>
+    public string PlanetFileSearchPattern => $"{BaseName}.p*";
+    
+    /// <summary>
+    /// Get the name of a planet file for a given race.
+    /// </summary>
+    /// <param name="r">The race to load.</param>
+    /// <returns>Fully qualified file path.</returns>
+    public string PlanetFileForRace (Model.Race r) => Path.Combine(GamePath, $"{BaseName}.p{r.PlayerFileId}");
+
+}