Added transaction

src/Banquale/Model/Transaction.cs

@@ -0,0 +1,110 @@
+using System.ComponentModel;
+using System.Runtime.Serialization;
+
+namespace Model
+{
+    [DataContract(IsReference = true)]
+    public class Transactions : INotifyPropertyChanged
+    {
+
+        void OnPropertyChanged(string propertyName)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+        [DataMember(Order = 1)]
+        public int Id { get; private set; }
+
+        [DataMember(Order = 2)]
+        public bool Type
+        { 
+            get => type;
+            set
+            {
+                if(type == value) 
+                    return;
+                type = value;
+                OnPropertyChanged(nameof(Type));
+            }
+        }
+        [DataMember]
+
+        private bool type;
+
+        [DataMember(Order = 3)]
+        public double Sum 
+        {
+            get => sum;
+            set
+            {
+                if (sum == value)
+                    return;
+                sum = value;
+                OnPropertyChanged(nameof(Sum));
+            }
+        }
+        [DataMember]
+        private double sum;
+
+        [DataMember(Order = 4)]
+        public Account InvolvedAccounts
+        {
+            get => involvedAccounts;
+            set
+            {
+                if (involvedAccounts == value)
+                    return;
+                involvedAccounts = value;
+                OnPropertyChanged(nameof(InvolvedAccounts));
+            }
+        }
+        [DataMember]
+        private Account involvedAccounts;
+
+        [DataMember(Order = 5)]
+        public string Category
+        {
+            get => category;
+            set
+            {
+                if (category == value)
+                    return;
+                category = value;
+                OnPropertyChanged(nameof(Category));
+            }
+        }
+        [DataMember]
+        private string? category;
+
+        [DataMember(Order = 6)]
+        public DateTime Date 
+        {
+            get => date;
+            set
+            {
+                if (date == value)
+                    return;
+                date = value;
+                OnPropertyChanged(nameof(Date));
+            }
+        }
+        [DataMember]
+        private DateTime date;
+
+        public Transactions(bool type, double sum, Account involvedAccounts/*, string category*/, int id, DateTime date)
+        {
+            Type = type;
+            Sum = sum;
+            Id = id;
+            InvolvedAccounts = involvedAccounts;
+            //Category = category;
+            Date = date;
+        }
+
+        public void ChangeCategory(string newCateg)
+        {
+            Category = newCateg;
+        }
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+    }
+}