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();
+            }
+        }
+    }
+}