Read the "Integrating XML into JavaScript" chapter in "JavaScript Tools Guide".
Below is a script I made a while ago. It can give you idea how to start writing your own script. It reads an xml-file, creates a new document from the template, relinks links listed in the xml-file comparing the width, height and resolution with data in the xml-file.
// Copyright 2011, «Студия Форма»
// October 3, 2011
// Written by Kasyan Servetsky
// http://www.kasyan.ho.com.ua
// e-mail: askoldich@yahoo.com
//==================================== GLOBALS ==========================================
var gErrMsgArr = [];
//=======================================================================================
Main();
//=================================== FUNCTIONS =========================================
function Main() {
var montage, doc, docFile, component, noErrors, pdfPath, pdfFile, targetPagesLength, destinationFolder;
var currentFolder = Folder.selectDialog("Выберите текущую папку"); //new Folder("/D/Evgen/");
if (currentFolder == null) exit();
var currentFolderPath = currentFolder.absoluteURI + "/";
var xmlFile = new File(currentFolderPath + "!sforder.xml");
if (!xmlFile.exists) exit();
var outFolderPath = "~/Desktop/Output/";
var outFolder = new Folder(outFolderPath);
if (!outFolder.exists) outFolder.create();
xmlFile.open("r");
var xmlStr = xmlFile.read();
xmlFile.close();
var root = new XML(xmlStr);
default xml namespace = "http://www.forma-studio.com/order";
var linksArr = [];
var componentList = root.xpath("/order/product/components/component");
var componentsLength = componentList.length();
for (var c = 0; c < componentsLength; c++) {
component = componentList;
linksArr.push({ name : component.images.image.file_name.toString(),
width : parseInt(component.images.image.size.width),
height : parseInt(component.images.image.size.height),
resolution : parseInt(component.images.image.resolution),
});
}
var montageList = root.xpath("/order/product/montages/montage");
var montagesLength = montageList.length();
for (var i = 0; i < montagesLength; i++) {
montage = montageList;
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.neverInteract;
app.open(new File(montage.layout_filename));
doc = app.activeDocument;
docFile = new File(outFolderPath + montage.result_filename + ".indd");
doc.save(docFile);
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.interactWithAll;
targetPagesLength = parseInt(montage.page_count);
if (!isNaN(targetPagesLength)) {
//$.writeln("About to remove pages - " + doc.name + " - " + montage.page_count);
while (doc.pages.length > targetPagesLength) {
doc.pages.lastItem().remove();
}
}
UpdateAllOutdatedLinks(doc);
noErrors = ProcessDoc(doc, linksArr, currentFolderPath);
if (noErrors) {
destinationFolder = new Folder(montage.destination);
VerifyFolder(destinationFolder);
pdfPath = montage.destination + "/" + montage.result_filename + ".pdf"
pdfFile = new File(pdfPath);
doc.exportFile(ExportFormat.PDF_TYPE, pdfFile, false, "[High Quality Print]");
}
doc.close(SaveOptions.YES);
}
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function ProcessDoc(doc, linksArr, currentFolderPath) {
var link, linkFile;
var noErrors = true;
var links = doc.links;
//~ $.writeln("--------------------------");
//~ $.writeln(doc.name);
for (var i = links.length-1; i >= 0; i--) {
link = doc.links;
for (var o = 0; o < linksArr.length; o++) {
if (link.name == linksArr.name) {
linkFile = new File(currentFolderPath + linksArr.name);
if (linkFile.exists) {
//~ $.writeln("\t" + o + " - " + linkFile.name + " - linkFile.exists");
if (CheckLink(link, linksArr, doc) == false) noErrors = false;
link.relink(linkFile);
}
else {
$.writeln(o + " - " + linkFile.name + " - linkFile doesn't exist");
noErrors = false;
}
}
}
}
//~ $.writeln("--------------------------");
return noErrors;
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function CheckLink(link, linkObj, doc) {
var errMessage;
var result = true;
var image = link.parent;
var actualPpi = image.actualPpi;
var md = link.linkXmp;
var reportFilePath = doc.fullName.absoluteURI.replace(/\.indd$/i, ".txt");
var width = parseInt(md.getProperty("http://ns.adobe.com/exif/1.0/", "exif:PixelXDimension"));
var height = parseInt(md.getProperty("http://ns.adobe.com/exif/1.0/", "exif:PixelYDimension"));
if (actualPpi[0] != linkObj.resolution && actualPpi[1] != linkObj.resolution) {
errMessage = link.name + " - resolution is NOT correct: " + actualPpi[0] + "/" + actualPpi[1] + " ppi instead of " + linkObj.resolution + "\r";
if (IsInArray(errMessage, gErrMsgArr) == false) {
gErrMsgArr.push(errMessage);
//$.writeln(errMessage);
WriteToFile(errMessage, reportFilePath);
result = false;
}
}
if (height != linkObj.height) {
errMessage = link.name + " - height is NOT correct: " + height + " pixels instead of " + linkObj.height + "\r";
if (IsInArray(errMessage, gErrMsgArr) == false) {
gErrMsgArr.push(errMessage);
//$.writeln(errMessage);
WriteToFile(errMessage, reportFilePath);
result = false;
}
}
if (width != linkObj.width) {
errMessage = link.name + " - width is NOT correct: " + width + " pixels instead of " + linkObj.width + "\r";
if (IsInArray(errMessage, gErrMsgArr) == false) {
gErrMsgArr.push(errMessage);
//$.writeln(errMessage);
WriteToFile(errMessage, reportFilePath);
result = false;
}
}
return result;
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function UpdateAllOutdatedLinks(doc) {
var link;
for (var i = doc.links.length-1; i >= 0; i--) {
link = doc.links;
if (link.status == LinkStatus.LINK_OUT_OF_DATE) link.update();
}
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function WriteToFile(text, reportFilePath) {
file = new File(reportFilePath);
file.encoding = "UTF-8";
if (file.exists) {
file.open("e");
file.seek(0, 2);
}
else {
file.open("w");
}
file.write(text);
file.close();
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function GetDate() {
var date = new Date();
if ((date.getYear() - 100) < 10) {
var year = "0" + new String((date.getYear() - 100));
}
else {
var year = new String((date.getYear() - 100));
}
var dateString = (date.getMonth() + 1) + "/" + date.getDate() + "/" + year + " " + date.getHours() + ":" + date.getMinutes() + ":" + date.getSeconds();
return dateString;
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function ErrorExit(error, icon) {
alert(error, gScriptName + " - " + gScriptVersion, icon);
exit();
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function IsInArray(string, arr) {
for (x in arr) {
if (string.toLowerCase() == arr.toLowerCase()) {
return true;
}
}
return false;
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
function VerifyFolder(folder) {
if (!folder.exists) {
var folder = new Folder(folder.absoluteURI);
var arr1 = new Array();
while (!folder.exists) {
arr1.push(folder);
folder = new Folder(folder.path);
}
var arr2 = new Array();
while (arr1.length > 0) {
folder = arr1.pop();
if (folder.create()) {
arr2.push(folder);
} else {
while (arr2.length > 0) {
arr2.pop.remove();
}
throw "Folder creation failed";
}
}
}
}
//--------------------------------------------------------------------------------------------------------------------------------------------------------
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