From 83f0db05da9817e793edc75224c36e1998f58547 Mon Sep 17 00:00:00 2001
From: jacs <me@jacs.guru>
Date: Sun, 8 Dec 2024 09:17:09 -0500
Subject: [PATCH] sample pdf with graph

---
 controllers/pdfsample.go | 139 +++++++++++++++++++++++++++++++++++++++
 routes.go                |   2 +
 2 files changed, 141 insertions(+)
 create mode 100644 controllers/pdfsample.go

diff --git a/controllers/pdfsample.go b/controllers/pdfsample.go
new file mode 100644
index 0000000..e1eca71
--- /dev/null
+++ b/controllers/pdfsample.go
@@ -0,0 +1,139 @@
+// Copyright (c) 2024 Jose Cely <jose.cely@gmail.com>
+// Use of this source code is governed by MIT-style
+// license that can be found in the LICENSE file.
+
+package controllers
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"time"
+
+	"git.smarteching.com/goffee/core"
+	"git.smarteching.com/zeni/go-chart/v2"
+	"github.com/jung-kurt/gofpdf"
+)
+
+// sample buffer back, pdf
+func Themepdf(c *core.Context) *core.Response {
+
+	var b bytes.Buffer
+	pw := io.Writer(&b)
+	//pr := io.Reader(&b)
+
+	marginX := 10.0
+	marginY := 20.0
+
+	pdf := gofpdf.New("P", "mm", "A4", "")
+	pdf.AddPage()
+	pdf.SetFont("Arial", "B", 16)
+
+	pdf.ImageOptions("storage/public/img/gopher_read.png", marginY, marginX, 25, 25, false, gofpdf.ImageOptions{ImageType: "PNG", ReadDpi: true}, 0, "")
+
+	pdf.SetXY(140, marginX)
+	pdf.SetFont("Arial", "B", 16)
+
+	//_, lineHeight := pdf.GetFontSize()
+
+	t := time.Now()
+	dateStr := t.Format("2006-01-02 15:04")
+
+	pdf.Cell(0, 10, "Report XYZ")
+	pdf.SetXY(140, 20)
+	pdf.SetFont("Arial", "B", 12)
+	pdf.Cell(0, 10, dateStr)
+
+	// Draw the table
+
+	pdf.SetXY(marginX, 50)
+
+	lineHt := 8.0
+
+	const colNumber = 2
+	header := [colNumber]string{"No", "Description"}
+	colWidth := [colNumber]float64{20.0, 70}
+
+	// Headers
+	pdf.SetFont("Arial", "B", 12)
+
+	pdf.SetFillColor(200, 200, 200)
+	for colJ := 0; colJ < colNumber; colJ++ {
+		pdf.CellFormat(colWidth[colJ], lineHt, header[colJ], "1", 0, "CM", true, 0, "")
+	}
+
+	pdf.Ln(-1)
+	pdf.SetFillColor(255, 255, 255)
+
+	// Table data
+	pdf.SetFontStyle("")
+
+	contents := getContents()
+
+	for _, content := range contents {
+		pdf.CellFormat(colWidth[0], lineHt, content[0], "1", 0, "CM", true, 0, "")
+		pdf.CellFormat(colWidth[1], lineHt, content[1], "1", 0, "LM", true, 0, "")
+		pdf.Ln(-1)
+	}
+
+	chartpng := getImageBuffer()
+	//r := bytes.NewReader(chartpng)
+
+	//httpimg.Register(pdf, url, "")
+	//pdf.Image(url, 110, 50, 80, 80, false, "", 0, "")
+	//pdf.ImageOptions("storage/public/img/biplane.jpg", 110, 50, 80, 80, false, gofpdf.ImageOptions{ImageType: "JPEG", ReadDpi: true}, 0, "")
+
+	pdf.RegisterImageOptionsReader("pcart.png", gofpdf.ImageOptions{ImageType: "PNG", ReadDpi: true}, chartpng)
+	pdf.ImageOptions("pcart.png", 110, 50, 80, 80, false, gofpdf.ImageOptions{ImageType: "JPEG", ReadDpi: true}, 0, "")
+
+	pdf.Ln(lineHt)
+	pdf.Ln(lineHt)
+
+	pdf.SetFont("Arial", "", 12)
+	_, lineHeight := pdf.GetFontSize()
+
+	pdf.Cell(0, lineHeight, "At vero eos et accusamus et iusto odio dignissimos dntium voluptatum deleniti atqu.")
+
+	// generate PDF
+	//pdf.OutputFileAndClose("hello.pdf")
+
+	err := pdf.Output(pw)
+	if err != nil {
+		fmt.Println(err)
+
+	}
+
+	return c.Response.BufferPDF("elreport.pdf", b)
+
+}
+
+func getContents() [][]string {
+	return [][]string{
+		{"node1", "Swamp"},
+		{"lore1", "Sorin, A Planeswalker"},
+		{"dia1", "Tassa"},
+		{"ter3", "Skinrender"},
+		{"bgt5", "Island"},
+		{"weww", "Mountain"},
+		{"asda", "Plain"},
+		{"tetra", "Time Walk"},
+	}
+}
+
+func getImageBuffer() *bytes.Buffer {
+	pie := chart.PieChart{
+		Width:  512,
+		Height: 512,
+		Values: []chart.Value{
+			{Value: 8, Label: "Blue"},
+			{Value: 5, Label: "Green"},
+			{Value: 2, Label: "Gray"},
+			{Value: 2, Label: "Orange"},
+		},
+	}
+
+	buffer := bytes.NewBuffer([]byte{})
+	pie.Render(chart.PNG, buffer)
+
+	return buffer
+}
diff --git a/routes.go b/routes.go
index 785c59e..d9c7fcc 100644
--- a/routes.go
+++ b/routes.go
@@ -27,6 +27,8 @@ func registerRoutes() {
 	controller.Get("/themepanel", controllers.Themedemo)
 	controller.Get("/themeelements", controllers.ThemeElements)
 
+	controller.Get("/themepdf", controllers.Themepdf)
+
 	// Uncomment the lines below to enable authentication
 	controller.Post("/signup", controllers.Signup)
 	controller.Post("/signin", controllers.Signin)