refactor<*>: rewrite all with AvaloniaUI

src/ViewModels/GitFlowStart.cs

@@ -0,0 +1,67 @@
+using System.ComponentModel.DataAnnotations;
+using System.Threading.Tasks;
+
+namespace SourceGit.ViewModels {
+    public class GitFlowStart : Popup {
+        [Required(ErrorMessage = "Name is required!!!")]
+        [RegularExpression(@"^[\w\-/\.]+$", ErrorMessage = "Bad branch name format!")]
+        [CustomValidation(typeof(GitFlowStart), nameof(ValidateBranchName))]
+        public string Name {
+            get => _name;
+            set => SetProperty(ref _name, value, true);
+        }
+
+        public string Prefix {
+            get => _prefix;
+        }
+
+        public bool IsFeature => _type == Models.GitFlowBranchType.Feature;
+        public bool IsRelease => _type == Models.GitFlowBranchType.Release;
+        public bool IsHotfix => _type == Models.GitFlowBranchType.Hotfix;
+
+        public GitFlowStart(Repository repo, Models.GitFlowBranchType type) {
+            _repo = repo;
+            _type = type;
+
+            switch (type) {
+            case Models.GitFlowBranchType.Feature:
+                _prefix = repo.GitFlow.Feature;
+                break;
+            case Models.GitFlowBranchType.Release:
+                _prefix = repo.GitFlow.Release;
+                break;
+            default:
+                _prefix = repo.GitFlow.Hotfix;
+                break;
+            }
+
+            View = new Views.GitFlowStart() { DataContext = this };
+        }
+
+        public static ValidationResult ValidateBranchName(string name, ValidationContext ctx) {
+            if (ctx.ObjectInstance is GitFlowStart starter) {
+                var check = $"{starter._prefix}{name}";
+                foreach (var b in starter._repo.Branches) {
+                    var test = b.IsLocal ? b.Name : $"{b.Remote}/{b.Name}";
+                    if (test == check) return new ValidationResult("A branch with same name already exists!");
+                }
+            }
+
+            return ValidationResult.Success;
+        }
+
+        public override Task<bool> Sure() {
+            _repo.SetWatcherEnabled(false);
+            return Task.Run(() => {
+                var succ = new Commands.GitFlow(_repo.FullPath).Start(_type, _name);
+                CallUIThread(() => _repo.SetWatcherEnabled(true));
+                return succ;
+            });
+        }
+
+        private Repository _repo = null;
+        private Models.GitFlowBranchType _type = Models.GitFlowBranchType.Feature;
+        private string _prefix = string.Empty;
+        private string _name = null;
+    }
+}