Implemented list of culture info & DeepL source culture

I18N Commander/DataModel/Database/SettingNames.cs

@@ -2,6 +2,7 @@
 
 public static class SettingNames
 {
+    public static readonly string DEEPL_SOURCE_CULTURE = "DeepL Source Culture";
     public static readonly string CULTURE = "Culture";
     public static readonly string DEEPL_ACTION = "DeepL Action";
     public static readonly string DEEPL_API_KEY = "DeepL API Key";

I18N Commander/Processor/AppSettings.cs

@@ -215,6 +215,73 @@ public static class AppSettings
     
     #endregion
 
+    #region DeepL Source Culture
+    
+    private static int CACHE_DEEPL_SOURCE_CULTURE = -1;
+    private static bool CACHE_DEEPL_SOURCE_CULTURE_IS_LOADED = false;
+    
+    public static async Task SetDeepLSourceCulture(int cultureIndex)
+    {
+        // Update the cache:
+        CACHE_DEEPL_SOURCE_CULTURE = cultureIndex;
+        CACHE_DEEPL_SOURCE_CULTURE_IS_LOADED = true;
+        
+        // Get the database:
+        await using var db = ProcessorMeta.ServiceProvider.GetRequiredService<DataContext>();
+        
+        // Check, if the setting is already set:
+        if (await db.Settings.FirstOrDefaultAsync(n => n.Code == SettingNames.DEEPL_SOURCE_CULTURE) is {} existingSetting)
+        {
+            existingSetting.IntegerValue = cultureIndex;
+            await db.SaveChangesAsync();
+        }
+        
+        // Does not exist, so create it:
+        else
+        {
+            var setting = new Setting
+            {
+                Code = SettingNames.DEEPL_SOURCE_CULTURE,
+                IntegerValue = cultureIndex,
+            };
+            
+            await db.Settings.AddAsync(setting);
+            await db.SaveChangesAsync();
+        }
+    }
+    
+    public static async Task<int> GetDeepLSourceCultureIndex()
+    {
+        // Check the cache:
+        if (CACHE_DEEPL_SOURCE_CULTURE_IS_LOADED)
+            return CACHE_DEEPL_SOURCE_CULTURE;
+        
+        // Get the database:
+        await using var db = ProcessorMeta.ServiceProvider.GetRequiredService<DataContext>();
+        
+        // Check, if the setting is already set:
+        if (await db.Settings.FirstOrDefaultAsync(n => n.Code == SettingNames.DEEPL_SOURCE_CULTURE) is { } existingSetting)
+            return existingSetting.IntegerValue;
+        
+        // Does not exist, so create it:
+        var setting = new Setting
+        {
+            Code = SettingNames.DEEPL_SOURCE_CULTURE,
+            IntegerValue = -1,
+        };
+            
+        await db.Settings.AddAsync(setting);
+        await db.SaveChangesAsync();
+        
+        var cultureIndex = setting.IntegerValue;
+        CACHE_DEEPL_SOURCE_CULTURE = cultureIndex;
+        CACHE_DEEPL_SOURCE_CULTURE_IS_LOADED = true;
+        
+        return cultureIndex;
+    }
+    
+    #endregion
+    
     #endregion
 
     #region Translation Settings
@@ -318,5 +385,28 @@ public static class AppSettings
     
     #endregion
 
+    #region Get a list of cultures
+
+    public readonly record struct CultureInfo(string Code, int Index);
+
+    public static async Task<List<CultureInfo>> GetCultureInfos()
+    {
+        // Get the number of cultures:
+        var numberOfCultures = await AppSettings.GetNumberCultures();
+        
+        // Get the culture codes:
+        var cultureInfos = new List<CultureInfo>();
+        for (var i = 1; i <= numberOfCultures; i++)
+            cultureInfos.Add(new CultureInfo
+            {
+                Code = await AppSettings.GetCultureCode(i),
+                Index = i,
+            });
+        
+        return cultureInfos;
+    }
+
+    #endregion
+
     #endregion
 }