ojp-sdk-legacy/lib/helpers/xml-helpers.js

OJP (Open Journey Planner) Javascript SDK (legacy version)

export class XML_Helpers {
    // from https://stackoverflow.com/a/47317538
    static prettyPrintXML(sourceXml) {
        var xmlDoc = new DOMParser().parseFromString(sourceXml, 'application/xml');
        var xsltDoc = new DOMParser().parseFromString([
            '<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform">',
            '  <xsl:strip-space elements="*"/>',
            '  <xsl:template match="para[content-style][not(text())]">',
            '    <xsl:value-of select="normalize-space(.)"/>',
            '  </xsl:template>',
            '  <xsl:template match="node()|@*">',
            '    <xsl:copy><xsl:apply-templates select="node()|@*"/></xsl:copy>',
            '  </xsl:template>',
            '  <xsl:output indent="yes"/>',
            '</xsl:stylesheet>',
        ].join("\n"), 'application/xml');
        try {
            var xsltProcessor = new XSLTProcessor();
            // TODO - check what's wrong in Firefox, why this fails
            xsltProcessor.importStylesheet(xsltDoc);
            var resultDoc = xsltProcessor.transformToDocument(xmlDoc);
            var resultXml = new XMLSerializer().serializeToString(resultDoc);
            return resultXml;
        }
        catch (error) {
            console.error('XML_Helpers.prettyPrintXML - fails, see TODO');
            return sourceXml;
        }
    }
}