add sample xlsx

controllers/pdfsample.go

@@ -11,8 +11,12 @@ import (
 	"time"
 
 	"git.smarteching.com/goffee/core"
+	// for graphs
 	"git.smarteching.com/zeni/go-chart/v2"
+	// for PDF
 	"github.com/jung-kurt/gofpdf"
+	// for xslx
+	"github.com/xuri/excelize/v2"
 )
 
 // sample buffer back, pdf
@@ -103,10 +107,69 @@ func Themepdf(c *core.Context) *core.Response {
 
 	}
 
-	return c.Response.BufferPDF("elreport.pdf", b)
+	return c.Response.BufferFile("elreport.pdf", "application/pdf", b)
 
 }
 
+func Themexslx(c *core.Context) *core.Response {
+
+	var b bytes.Buffer
+
+	f := excelize.NewFile()
+
+	defer func() {
+		if err := f.Close(); err != nil {
+			fmt.Println(err)
+		}
+	}()
+
+	for idx, row := range [][]interface{}{
+		{nil, "Cerveza", "Vodka", "Ron"}, {"Small", 2, 3, 3},
+		{"Normal", 5, 2, 4}, {"Large", 6, 7, 8},
+	} {
+		cell, err := excelize.CoordinatesToCellName(1, idx+1)
+		if err != nil {
+			fmt.Println(err)
+		}
+		f.SetSheetRow("Sheet1", cell, &row)
+	}
+
+	if err := f.AddChart("Sheet1", "E1", &excelize.Chart{
+		Type: excelize.Pie,
+		Series: []excelize.ChartSeries{
+			{
+				Name:       "Totales",
+				Categories: "Sheet1!$B$1:$D$1",
+				Values:     "Sheet1!$B$2:$D$2",
+			},
+		},
+		Format: excelize.GraphicOptions{
+			OffsetX: 15,
+			OffsetY: 10,
+		},
+		Title: []excelize.RichTextRun{
+			{
+				Text: "Fruit Pie Chart",
+			},
+		},
+		PlotArea: excelize.ChartPlotArea{
+			ShowPercent: true,
+		},
+	}); err != nil {
+		fmt.Println(err)
+	}
+
+	buf, err := f.WriteToBuffer()
+	if err != nil {
+		fmt.Fprint(buf, err.Error())
+	}
+
+	// Get byte array
+	b.ReadFrom(buf)
+
+	return c.Response.BufferFile("elreport.xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", b)
+}
+
 func getContents() [][]string {
 	return [][]string{
 		{"node1", "Swamp"},