(Node.js) XML SearchForAttribute Method

Demonstrates the SearchForAttribute method.

The input XML, available at http://www.chilkatsoft.com/data/fruitSearch.xml, is this:

<root>
    <searchRoot>
        <fruit color="red">apple</fruit>
        <fruit color="green">pear</fruit>
        <veg color="orange">carrot</veg>
        <meat animal="cow">beef</meat>
        <xyz>
            <fruit color="blue">blueberry</fruit>
            <veg color="green">broccoli</veg>
        </xyz>
        <fruit color="purple">grape</fruit>
        <cheese color="yellow">cheddar</cheese>
    </searchRoot>
    <fruit color="red">strawberry</fruit>
    <fruit color="orange">peach</fruit>
</root>

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    var xml = new chilkat.Xml();
    // xSearchRoot: Xml
    var xSearchRoot;
    // xBeginAfter: Xml
    var xBeginAfter;
    // xFound: Xml
    var xFound;

    var success = xml.LoadXmlFile("qa_data/xml/fruitSearch.xml");
    if (success !== true) {
        console.log(xml.LastErrorText);
        return;
    }

    // Search the sub-tree rooted at "searchRoot"
    xSearchRoot = xml.FindChild("searchRoot");
    if (xml.LastMethodSuccess == false) {
        console.log("searchRoot not found, searching from root.");
        xSearchRoot = xml.GetRoot();
    }

    // Search for all "fruit" nodes having a color attribute
    // where the name of the color ends in "e"
    xBeginAfter = xSearchRoot.GetSelf();
    xFound = xSearchRoot.SearchForAttribute(xBeginAfter,"fruit","color","*e");
    while ((xSearchRoot.LastMethodSuccess == true)) {

        console.log(xFound.Content + ": " + xFound.GetAttrValue("color"));

        xBeginAfter = xFound;
        xFound = xSearchRoot.SearchForAttribute(xBeginAfter,"fruit","color","*e");
    }

    // The correct output is:
    // grape: purple
    // blueberry: blue

    console.log("--------------------------");

    // ---------------------------------------------------------------------------------
    // Now do the same, but instead use SearchForAttribute2
    // which updates the internal reference of the caller instead
    // of returning the found node.
    // xSearch: Xml
    var xSearch;

    xBeginAfter = xSearchRoot.GetSelf();
    xSearch = xSearchRoot.GetSelf();

    success = xSearch.SearchForAttribute2(xBeginAfter,"fruit","color","*e");
    while (success == true) {

        console.log(xSearch.Content + ": " + xSearch.GetAttrValue("color"));

        // Copy the internal references so that the next search
        // begins after the found node.
        xBeginAfter.CopyRef(xSearch);
        xSearch.CopyRef(xSearchRoot);

        success = xSearch.SearchForAttribute2(xBeginAfter,"fruit","color","*e");
    }


}

chilkatExample();