Add Calendar widget to display the monthly calendar and integrate it into the layout

main.go

@@ -34,6 +34,7 @@ func initWidgets(ctx context.Context, term *tcell.Terminal) {
 	widgets.Create(ctx, term,
 		widgets.New("Clock", widgets.Clock()),
 		widgets.New("Date", widgets.Date()),
+		widgets.New("Calendar", widgets.Calendar()),
 		widgets.New("ChangeTitle", widgets.TextInput(titleUpdate, textinput.Label("Update Title: "), textinput.PlaceHolder("New Title"))),
 		widgets.New("Wifi", widgets.WifiQRCode()),
 		widgets.New("NetworkDevices", widgets.NetworkDevices()),
@@ -73,15 +74,7 @@ func layout() []container.Option {
 					container.BorderColor(cell.ColorWhite),
 				),
 			),
-			grid.RowHeightFixed(3,
-				grid.Widget(widgets.Get["Date"],
-					container.AlignHorizontal(align.HorizontalCenter),
-					container.BorderTitle("Date"),
-					container.Border(linestyle.Light),
-					container.BorderColor(cell.ColorWhite),
-				),
-			),
-			grid.RowHeightFixed(8,
+			grid.RowHeightFixed(11,
 				grid.Widget(widgets.Get["PiHole"],
 					container.BorderTitle("pi-hole"),
 					container.Border(linestyle.Light),
@@ -99,7 +92,18 @@ func layout() []container.Option {
 				grid.Widget(widgets.Get["empty"]),
 			),
 		),
-		grid.ColWidthPerc(35,
+		grid.ColWidthPerc(10,
+			grid.RowHeightFixed(19,
+				grid.Widget(widgets.Get["Calendar"],
+					container.BorderTitle("Calendar"),
+					container.Border(linestyle.Light),
+					container.BorderColor(cell.ColorWhite)),
+			),
+			grid.RowHeightPerc(25,
+				grid.Widget(widgets.Get["empty"]),
+			),
+		),
+		grid.ColWidthPerc(25,
 			grid.RowHeightPerc(25,
 				grid.Widget(widgets.Get["empty"]),
 			),

widgets/calendar.go

@@ -0,0 +1,145 @@
+package widgets
+
+import (
+	"ArinDash/util"
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/mum4k/termdash/cell"
+	"github.com/mum4k/termdash/terminal/terminalapi"
+	"github.com/mum4k/termdash/widgetapi"
+	"github.com/mum4k/termdash/widgets/text"
+)
+
+type CalendarOptions struct {
+}
+
+func Calendar() CalendarOptions {
+	widgetOptions["CalendarOptions"] = createCalendar
+	return CalendarOptions{}
+}
+
+func createCalendar(ctx context.Context, _ terminalapi.Terminal, _ interface{}) widgetapi.Widget {
+	widget := util.PanicOnErrorWithResult(text.New())
+
+	go util.Periodic(ctx, 1*time.Hour, func() error {
+
+		widget.Reset()
+		if err := widget.Write("┌────────────────────┐\n", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
+			return err
+		}
+		if err := widget.Write(fmt.Sprintf("|%-20s|\n", time.Now().Format("January 2006")), text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
+			return err
+		}
+		if err := widget.Write("├────────────────────┤\n", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
+			return err
+		}
+		if err := createRow(widget, "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"); err != nil {
+			return err
+		}
+		if err := createTableForMonth(widget); err != nil {
+			return err
+		}
+		if err := createLowerBorder(widget); err != nil {
+			return err
+		}
+		return nil
+	})
+
+	return widget
+}
+
+func createTableForMonth(widget *text.Text) error {
+	table := make([]int, 0)
+	now := time.Now()
+	firstMonthday := time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, time.UTC)
+	for range (firstMonthday.Weekday() + 6) % 7 {
+		table = append(table, 0)
+	}
+
+	for {
+		day := firstMonthday.Day()
+		table = append(table, day)
+		firstMonthday = firstMonthday.AddDate(0, 0, 1)
+		if firstMonthday.Month() != now.Month() {
+			break
+		}
+	}
+	remainingDays := 8 - len(table)/7
+	for range remainingDays {
+		table = append(table, 0)
+	}
+
+	for index, field := range table {
+		if index%7 == 0 {
+			if err := createMiddle(widget); err != nil {
+				return err
+			}
+		}
+		var str string
+		if err := widget.Write("|"); err != nil {
+			return err
+		}
+		if field == 0 {
+			str = fmt.Sprintf("  ")
+		} else {
+			str = fmt.Sprintf("%2d", field)
+		}
+		var color text.WriteOption
+		if field == now.Day() {
+			color = text.WriteCellOpts(cell.FgColor(cell.ColorBlack), cell.BgColor(cell.ColorWhite), cell.Bold())
+		} else {
+			color = text.WriteCellOpts(cell.FgColor(cell.ColorWhite), cell.BgColor(cell.ColorDefault))
+		}
+		if err := widget.Write(str, color); err != nil {
+			return err
+		}
+		if index%7 == 6 {
+			if err := widget.Write("|\n"); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func createLowerBorder(widget *text.Text) error {
+	result := "└─"
+	for range 6 {
+		result += "─┴─"
+	}
+	result += "─┘\n"
+	if err := widget.Write(result, text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
+		return err
+	}
+	return nil
+}
+
+func createMiddle(widget *text.Text) error {
+	result := "├─"
+	for range 6 {
+		result += "─┼─"
+	}
+	result += "─┤\n"
+	if err := widget.Write(result, text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
+		return err
+	}
+	return nil
+}
+
+func createRow(widget *text.Text, cells ...string) error {
+	result := "|"
+	for index, field := range cells {
+		result += fmt.Sprintf("%2s", field)
+		if index < len(cells)-1 {
+			result += "|"
+		} else {
+			result += "|\n"
+		}
+	}
+	if err := widget.Write(result, text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
+		return err
+	}
+	return nil
+}