Merge pull request #460 from meshery/MUzairS15/svg-utils

add svg utility funcs

utils/helm/helm.go

@@ -38,7 +38,10 @@ func DryRunHelmChart(chart *chart.Chart) ([]byte, error) {
 
 // Takes in the directory and converts HelmCharts/multiple manifests into a single K8s manifest
 func ConvertToK8sManifest(path string, w io.Writer) error {
-	info, _ := os.Stat(path)
+	info, err := os.Stat(path)
+	if err != nil {
+		return utils.ErrReadDir(err, path)
+	}
 	helmChartPath := path
 	if !info.IsDir() {
 		helmChartPath, _ = strings.CutSuffix(path, filepath.Base(path))

utils/svg_utils.go

@@ -0,0 +1,109 @@
+package utils
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+)
+
+const XMLTAG = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE svg>"
+
+// UpdateSVGString updates the width and height attributes of an SVG file and returns the modified SVG as a string.
+func UpdateSVGString(svgStr string, width, height int) (string, error) {
+	// Create a reader for the SVG string.
+	r := strings.NewReader(svgStr)
+
+	// Create a decoder for the SVG string.
+	d := xml.NewDecoder(r)
+
+	// Create a buffer for the modified SVG string.
+	var b bytes.Buffer
+
+	// Create an encoder for the buffer.
+	e := xml.NewEncoder(&b)
+
+	// Iterate through the tokens in the SVG string.
+	for {
+		// Read the next token.
+		t, err := d.Token()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return "", err
+		}
+
+		// If the token is an element name, check if it is an "svg" element.
+		if se, ok := t.(xml.StartElement); ok {
+			if se.Name.Local == "svg" {
+				// Set the width and height attributes to the desired values.
+				updatedH := false
+				updatedW := false
+				xmlnsindex := -1
+				for i, a := range se.Attr {
+					if a.Name.Local == "width" {
+						se.Attr[i].Value = strconv.Itoa(width)
+						updatedW = true
+					} else if a.Name.Local == "height" {
+						se.Attr[i].Value = strconv.Itoa(height)
+						updatedH = true
+					}
+					if a.Name.Local == "xmlns" {
+						xmlnsindex = i
+					}
+				}
+				if !updatedH {
+					se.Attr = append(se.Attr, xml.Attr{
+						Name: xml.Name{
+							Local: "height",
+						},
+						Value: strconv.Itoa(height),
+					})
+				}
+				if !updatedW {
+					se.Attr = append(se.Attr, xml.Attr{
+						Name: xml.Name{
+							Local: "width",
+						},
+						Value: strconv.Itoa(width),
+					})
+				}
+				if xmlnsindex > -1 {
+					se.Attr = append(se.Attr[0:xmlnsindex], se.Attr[xmlnsindex+1:]...)
+				}
+			} else {
+				for i, a := range se.Attr {
+					xmlnsindex := -1
+					nahbro := 0
+					if a.Name.Local == "xmlns" {
+						fmt.Println("found at ", i)
+						fmt.Println(a.Name)
+						xmlnsindex = i
+						nahbro++
+					}
+					if xmlnsindex > -1 {
+						se.Attr = append(se.Attr[0:xmlnsindex], se.Attr[xmlnsindex+1:]...)
+					}
+				}
+			}
+			t = se
+		}
+		// Write the modified token to the buffer.
+		if err := e.EncodeToken(t); err != nil {
+			return "", err
+		}
+	}
+
+	// Flush the encoder's buffer to the buffer.
+	if err := e.Flush(); err != nil {
+		return "", err
+	}
+	var svg string
+	if b.String() != "" {
+		svg = XMLTAG + b.String()
+	}
+	return svg, nil
+}