Реализован базовый функционал редактора конфигов

Signed-off-by: Lev Rusanov <30170278+JDM170@users.noreply.github.com>

ConfigEditor/MainForm.cs

@@ -1,16 +1,21 @@
-using System.IO;
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
 using System.Windows.Forms;
 
 namespace ConfigEditor
 {
     public partial class MainForm: Form
     {
+        private string opened_file = null;
+
         public MainForm()
         {
             InitializeComponent();
         }
 
-        private void открытьToolStripMenuItem_Click(object sender, System.EventArgs e)
+        private void openToolStripMenuItem_Click(object sender, EventArgs e)
         {
             OpenFileDialog ofd = new OpenFileDialog()
             {
@@ -19,11 +24,81 @@ namespace ConfigEditor
                 Multiselect = false
             };
             if (ofd.ShowDialog() == DialogResult.OK)
+            {
+                opened_file = ofd.FileName;
                 richTextBox1.Text = File.ReadAllText(ofd.FileName);
+            }
         }
 
-        private void закрытьToolStripMenuItem_Click(object sender, System.EventArgs e)
+        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
         {
+            File.WriteAllText(opened_file, richTextBox1.Text);
+        }
+
+        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            SaveFileDialog sfd = new SaveFileDialog
+            {
+                Title = "Сохранить файл конфигурации",
+                Filter = "Файл *.json|*.json"
+            };
+            if (sfd.ShowDialog() == DialogResult.OK)
+                File.WriteAllText(sfd.FileName, richTextBox1.Text);
+        }
+
+        private void generateMD5ToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            using (var md5 = MD5.Create())
+            {
+                using (FileStream stream = File.OpenRead(opened_file))
+                    md5.ComputeHash(stream);
+                
+                StringBuilder sb = new StringBuilder();
+                byte[] hash = md5.Hash;
+                for (int i = 0; i < hash.Length; i++)
+                    sb.Append(hash[i].ToString("x2"));
+
+                Clipboard.SetText(sb.ToString());
+                MessageBox.Show($"Hash successfully copied into your clipboard.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
+            }
+        }
+
+        private bool CheckChanges()
+        {
+            if (richTextBox1.Text != File.ReadAllText(opened_file))
+            {
+                DialogResult result = MessageBox.Show("The document has been modified.\nDo you want to save your changes?", "Question", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
+                if (result == DialogResult.Yes)
+                {
+                    File.WriteAllText(opened_file, richTextBox1.Text);
+                    MessageBox.Show("File successfully saved.", "Info", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                    return true;
+                }
+                else if (result == DialogResult.Cancel)
+                    return false;
+            }
+            return true;
+        }
+
+        private void closeFileToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (!CheckChanges())
+                return;
+            richTextBox1.Clear();
+            opened_file = null;
+        }
+
+        private void closeToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (!CheckChanges())
+                return;
+            Application.Exit();
+        }
+
+        private void MainForm_FormClosed(object sender, FormClosedEventArgs e)
+        {
+            if (!CheckChanges())
+                return;
             Application.Exit();
         }
     }