Added the translation processor

I18N Commander/Processor/TranslationProcessor.cs

@@ -0,0 +1,52 @@
+using DataModel.Database;
+using DataModel.Database.Common;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Processor;
+
+public static class TranslationProcessor
+{
+    public static async Task<List<Translation>> GetTranslations(TextElement textElement)
+    {
+        await using var db = ProcessorMeta.ServiceProvider.GetRequiredService<DataContext>();
+        var missedTranslations = new List<Translation>();
+        var cultureInfos = await AppSettings.GetCultureInfos();
+        foreach (var cultureInfo in cultureInfos)
+        {
+            if(!await db.Translations.AnyAsync(n => n.TextElement == textElement && n.Culture == cultureInfo.Code))
+                missedTranslations.Add(new Translation
+                {
+                    Culture = cultureInfo.Code,
+                    Text = string.Empty,
+                });
+        }
+        
+        if(missedTranslations.Count > 0)
+        {
+            textElement.Translations.AddRange(missedTranslations);
+            db.TextElements.Update(textElement);
+            await db.SaveChangesAsync();
+        }
+
+        return await db.Translations.Where(n => n.TextElement == textElement).ToListAsync();
+    }
+    
+    public static async Task<ProcessorResult<Translation>> SaveChangedTranslation(int translationId, string text)
+    {
+        await using var db = ProcessorMeta.ServiceProvider.GetRequiredService<DataContext>();
+        var dbTranslation = await db.Translations.FirstAsync(n => n.Id == translationId);
+        dbTranslation.Text = text;
+        
+        try
+        {
+            // Save the changes:
+            await db.SaveChangesAsync();
+            return new ProcessorResult<Translation>(dbTranslation);
+        }
+        catch (DbUpdateException updateException)
+        {
+            return updateException.ToProcessorResult<Translation>();
+        }
+    }
+}