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// psdFileData is a multidimentional array which contains both source and 
// destination paths for each psd file.
// eg: [D:\folder1\myfile.psd,D:\folder2\myfile\myfile.psd]

// parse XML and replace PSD paths
if (psdFileData.length > 0) {
    xmlFile.open("r");
    var xmlString = xmlFile.read();
    var xmlData = new XML(xmlString);
    default xml namespace = "http://www.adobe.com/products/aftereffects";
    xmlFile.close();
    
    var relativeIndexIntoFullpathLength = (folder2 + "/").length;
    var pathNodes = xmlData.Fold.Item.xpath ("//*[@fullpath]");
    
    for (var i = 0; i < pathNodes.length(); i++) {
        var referenceFullpath = pathNodes[i].@fullpath.toString();
        var xmlFileIndex = findInMulDimArray(psdFileData, 0, referenceFullpath);
        if (xmlFileIndex != -1) {
            pathNodes[i].@fullpath = psdFileData[xmlFileIndex][1];
            pathNodes[i].@relativeAscendCountFromProject = "1";
            pathNodes[i].@relativeIndexIntoFullpath = relativeIndexIntoFullpathLength;
        }
    }
    
    xmlFile.open("w");
    xmlFile.write(xmlData);
    xmlFile.close();
}

// find a match in an element of a subarray
function findInMulDimArray(searchArray, searchIndex, searchString) {
    for (var i = 0; i < searchArray.length; i++) {
        if (searchArray[i][searchIndex] === searchString) {
            return i;
        }
    }
    return -1;
}