Added themes

DiscordBotUI/ThemeManager.cs

@@ -0,0 +1,115 @@
+using DiscordBotUI_Windows.Theming;
+
+namespace DiscordBotUI_Windows
+{
+    internal class ThemeManager
+    {
+        private readonly string _ThemesFolder = "DiscordBotUI/Themes";
+        private readonly Theme _DefaultTheme = new Theme
+        {
+            Name = "Default",
+            Description = "Default theme",
+            Type = ThemeType.Undefined,
+            ThemeValues = new Dictionary<string, string>
+            {
+                { "BackgroundColor", "#36393F" },
+                { "TextColor", "#000000" }
+            }
+        };
+
+        internal Theme CurrentTheme { get; private set; }
+
+        internal IList<Theme> _InstalledThemes { get; private set; }
+
+        internal ThemeManager()
+        {
+            _InstalledThemes = new List<Theme>();
+            CurrentTheme = _DefaultTheme;
+        }
+
+        private void SetControlTheme(Control control, Theme theme, bool doChildToo)
+        {
+            
+            control.BackColor = ColorTranslator.FromHtml(theme.ThemeValues["BackgroundColor"]);
+            control.ForeColor = ColorTranslator.FromHtml(theme.ThemeValues["TextColor"]);
+
+            // Fix for data grid view
+            if (control is DataGridView dataGridView)
+            {
+                dataGridView.BackgroundColor = control.BackColor;
+                dataGridView.DefaultCellStyle.BackColor = control.BackColor;
+                dataGridView.DefaultCellStyle.ForeColor = control.ForeColor;
+                dataGridView.DefaultCellStyle.SelectionBackColor = control.BackColor;
+                dataGridView.DefaultCellStyle.SelectionForeColor = control.ForeColor;
+
+                dataGridView.ColumnHeadersDefaultCellStyle.BackColor = control.BackColor;
+                dataGridView.ColumnHeadersDefaultCellStyle.ForeColor = control.ForeColor;
+                dataGridView.ColumnHeadersDefaultCellStyle.SelectionBackColor = control.BackColor;
+                dataGridView.ColumnHeadersDefaultCellStyle.SelectionForeColor = control.ForeColor;
+
+            }
+
+
+
+            if (doChildToo)
+            {
+                foreach (Control childControl in control.Controls)
+                {
+                    SetControlTheme(childControl, theme, true);
+                }
+            }
+        }
+
+        internal void SetFormTheme(Theme theme, Form windowsForm)
+        {
+            CurrentTheme = theme;
+            SetControlTheme(windowsForm, theme, true);
+            Config.ApplicationSettings["AppTheme"] = theme.Name;
+        }
+
+        internal void SetTheme(string themeName)
+        {
+            CurrentTheme = _InstalledThemes.FirstOrDefault(x => x.Name == themeName, _DefaultTheme);
+            Config.ApplicationSettings["AppTheme"] = themeName;
+            
+        }
+
+        private async Task<Theme> LoadThemeFromFile(string fileName)
+        {
+            return await DiscordBotCore.Others.JsonManager.ConvertFromJson<Theme>(fileName);
+        }
+
+        internal async Task SaveThemeToFile(string themeName)
+        {
+            Theme? theme = _InstalledThemes.FirstOrDefault(x => x.Name == themeName);
+            if (theme == null)
+                throw new Exception("Theme not found");
+
+            string basefolderPath = Path.Combine(DiscordBotCore.Application.CurrentApplication.DataFolder, _ThemesFolder);
+            Directory.CreateDirectory(basefolderPath);
+            string filePath = Path.Combine(basefolderPath, $"{themeName}.json");
+            await DiscordBotCore.Others.JsonManager.SaveToJsonFile(filePath, theme);
+        }
+
+        internal async Task<int> LoadThemesFromThemesFolder()
+        {
+            string basefolderPath = Path.Combine(DiscordBotCore.Application.CurrentApplication.DataFolder, _ThemesFolder);
+            Directory.CreateDirectory(basefolderPath);
+            var files = Directory.GetFiles(basefolderPath, "*.json");
+            _InstalledThemes.Clear();
+            if(files.Length == 0)
+            {
+                _InstalledThemes.Add(_DefaultTheme);
+                return 1;
+            }
+
+            foreach (var file in files)
+            {
+                var theme = await LoadThemeFromFile(file);
+                _InstalledThemes.Add(theme);
+            }
+
+            return _InstalledThemes.Count;
+        }
+    }
+}