Allow translations of BTCPay Server Backend by admins (#5662)

BTCPayServer/Models/ServerViewModels/CreateDictionaryViewModel.cs

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+using System;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using BTCPayServer.Services;
+using Microsoft.AspNetCore.Mvc.Rendering;
+
+namespace BTCPayServer.Models.ServerViewModels;
+public class CreateDictionaryViewModel
+{
+    [Required(AllowEmptyStrings = false)]
+    public string Name { get; set; }
+    public string Fallback { get; set; }
+    public SelectListItem[] DictionariesListItems { get; set; }
+
+    internal CreateDictionaryViewModel SetDictionaries(LocalizerService.Dictionary[] dictionaries)
+    {
+        var items = dictionaries.Select(d => new SelectListItem(d.DictionaryName, d.DictionaryName, d.DictionaryName == Fallback)).ToArray();
+        DictionariesListItems = items;
+        return this;
+    }
+}

BTCPayServer/Models/ServerViewModels/EditDictionaryViewModel.cs

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+using BTCPayServer.Services;
+
+namespace BTCPayServer.Models.ServerViewModels;
+
+public class EditDictionaryViewModel
+{
+    public string Translations { get; set; }
+    public int Lines { get; set; }
+
+    internal EditDictionaryViewModel SetTranslations(Translations translations)
+    {
+        Translations = translations.ToTextFormat();
+        Lines = translations.Records.Count;
+        return this;
+    }
+}

BTCPayServer/Models/ServerViewModels/ListDictionariesViewModel.cs

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+using System;
+using System.Collections.Generic;
+using BTCPayServer.Services;
+using Microsoft.AspNetCore.Mvc.Rendering;
+
+namespace BTCPayServer.Models.ServerViewModels
+{
+    public class ListDictionariesViewModel
+    {
+        public class DictionaryViewModel
+        {
+            public string DictionaryName { get; set; }
+            public string Fallback { get; set; }
+            public string Source { get; set; }
+            public bool Editable { get; set; }
+            public bool IsSelected { get; set; }
+        }
+
+        public List<DictionaryViewModel> Dictionaries = new List<DictionaryViewModel>();
+    }
+}