class NoXml {

    private String xml;
    private String origXml;
    private String xmlFilePath;

    def open(String path) throws IOException {
        xmlFilePath = path;
        xml = new File(path).getText();
        origXml = xml;
        this;
    }

    def getXml() {
        xml;
    }

    def insertAfter(String nodeName, String xmlSnippet) {
        // <pippo>...</pippo>
        int closingTagStart = xml.indexOf("</" + nodeName);
        int closingTagEnd = xml.indexOf(">", closingTagStart);

        //System.out.println(closingTagStart + " " + closingTagEnd);
        StringBuffer sb = new StringBuffer(xml);
        sb.insert(closingTagEnd + 1, "\n" + xmlSnippet);
        xml = sb.toString();
        return this;
    }

    def replace(String nodeName, String xmlSnippet, String insertNode = null) {

        int openTagStart = xml.indexOf("<" + nodeName);
        int closingTagStart = xml.indexOf("</" + nodeName);
        int closingTagEnd = xml.indexOf(">", closingTagStart);

        //println "::debug " + openTagStart + " " + closingTagStart + " " + closingTagEnd

        if (openTagStart == -1 || closingTagStart == -1) {
            if (insertNode !=null) {
                insertAfter(insertNode, xmlSnippet)
            } else {
                throw new Exception ("node to replace not found")
            }
        } else {
            StringBuffer sb = new StringBuffer(xml);
            sb.replace(openTagStart, closingTagEnd + 1, xmlSnippet);
            xml = sb.toString();
        }
        return this;
    }


    def save() {
        new File(xmlFilePath).write(xml)
        return this;
    }

    def save(String path) {
        writeFile(new File(path), xml);
        return this;
    }

}