/* Script for InDesign CS2, CS3 and CS4 
Version 14.1 
This script relinks old links with new ones in a folder you choose, including subfolders. 
At first, it looks for the new link that has the same name as the old one, in the selected folder, and if it's found, relinks it. 
If the link with the exact name is not found and the link is not a text file (e.g. InCopy, Word, RTF, Exel file), the sript tries to find a file with the same base name but a different extension (".psd", ".tif", ".jpg", ".ai", ".eps", ".pdf", ".indd").  
If the script doesn't find the new link in the chosen folder, it repeats the above-mentioned process for every subfolder. 
Written by Kasyan Servetsky in June 2008. 
askoldich@yahoo.com */ 
 
#target indesign 
 
if (app.documents.length == 0) { 
	alert("Please open a document and try again.", "Script will be terminated", true); 
	exit(); 
} 
var myDoc = app.activeDocument; 
var myLinks = myDoc.links; // myDoc.links.selection ??? 
if (myLinks.length == 0) { 
	alert("This document doesn't contain any links.", "Script will be terminated"); 
	exit();	 
} 
var myFolder = Folder.selectDialog ("Choose a folder with new links"); 
if (myFolder == null) { 
	exit(); 
} 
var myCounter = 0; 
var myInDesignVersion = Number(String(app.version).split(".")[0]); 
var mySubFolders = new Array (myFolder.absoluteURI); 
getSubFolders(myFolder); 
crearLabels(); 
// List all possible file extension in this array 
var myExtentions = [".psd", ".tif", ".jpg", ".ai", ".eps", ".pdf"]; 
 
	// Progress bar 
	if (myInDesignVersion >= 5) { 
		var stop = myLinks.length; 
		var w = new Window ( 'window', 'Starting relinking files' ); 
		var pb = w.add ('progressbar', [12, 12, 350, 24], 0, stop); 
		var txt = w.add('statictext'); 
		txt.bounds = [0, 0, 340, 20]; 
		txt.alignment = "left"; 
		w.show(); 
		var a = 1; 
	} // Progress bar 
 
// Loop through all links 
for (i = myLinks.length-1; i >= 0 ; i--) { 
	var myLink = myLinks[i]; 
	if (myLink.extractLabel("relinked") != "yes") { 
		 
		// Progress bar 
		if (myInDesignVersion >= 5) { 
			pb.value = a; 
			a++; 
			txt.text = String("Relinking file - " + myLink.name); 
		} // Progress bar 
 
		var myOldImageFile = new File (myLink.filePath); 
		var myOldPath = myOldImageFile.toString(); 
		// Loop through all subfolders; the first subfolder is always the root folder 
		for (var s = 0; s < mySubFolders.length; s++)  { 
			mySubFolder = mySubFolders[s] + "/"; 
			 
			// Progress bar 
			if (myInDesignVersion >= 5) { 
				var myCurrFolder = Folder (mySubFolders[s]); 
				w.text = "Current folder - \"" + myCurrFolder.displayName + "\""; 
			} // Progress bar 
		 
			if (LinkUsage(myLink) == 1) { 
				main(myLink, mySubFolder); 
			} 
			else { 
				processMultiUsedLinks(); 
			} 
		} 
	} 
} 
	// Progress bar 
	if (myInDesignVersion >= 5) { 
		w.close(); 
	} // Progress bar 
 
//-------------------------------- Final report ---------------------------- 
if (myCounter == 1) { 
	alert("One file has been relinked.", "Finished"); 
} 
else if  (myCounter > 1) { 
	alert(myCounter + " files have been relinked.", "Finished"); 
} 
else { 
	alert("Nothing has been relinked.", "Finished"); 
}  
 
//------------------------- Functions ------------------------------------- 
function main(myLink, myNewFolder) { 
	var myNewPath = myNewFolder + myLink.name.replace(" ", "%20"); 
	if (myOldPath != myNewPath) { 
		var myResult = myRelink(myNewPath, myLink); 
		if (myResult == false) { 
			// If the link is not a text file 
			if ( 
				myLink.linkType != "InCopyInterchange" &&  
				myLink.linkType != "InCopyStory" && 
				myLink.linkType != "InCopyMarkup" && 
				myLink.linkType != "Microsoft Excel Import Filter" && 
				myLink.linkType != "Microsoft Word Import Filter" && 
				myLink.linkType != "RTF Import Filter" && 
				myLink.linkType != "Text" 
				) { 
				// If file not found, try with another extention 
				for (var k = 0; k < myExtentions.length; k++)  { 
					try { 
						var myBasename = myNewPath.match(/(.*)\.[^\.]+$/)[1]; 
						myNewPath = myBasename + myExtentions[k]; 
						myRelink(myNewPath, myLink); 
					} 
					catch (myError){} 
				} 
			} 
		} 
	} 
} 
// Relink and update 
function myRelink(myNewPath, myLink) { 
	var myNewLink =  new File (myNewPath); 
		if (myNewLink.exists) { 
			myLink.relink (myNewLink); 
			try { 
				var myCurrentLink = myLink.update(); 
			} catch(e){} 
			if ( app.version.substr(0, 3) == "6.0" && (parseInt(app.version.substr(4, 1)) >= 4) ) { 
				myLink.insertLabel("relinked", "yes"); 
			} 
			else { 
				myCurrentLink.insertLabel("relinked", "yes"); 
			} 
		 
			myCounter++; 
			return true; 
		} 
	return false; 
} 
// Get all subfolders in the selected folder 
function getSubFolders(theFolder) { 
	var myFileList = theFolder.getFiles(); 
	for (var i = 0; i < myFileList.length; i++) { 
		var myFile = myFileList[i]; 
		if (myFile instanceof Folder){ 
			mySubFolders.push(myFile.absoluteURI); 
			getSubFolders(myFile); 
		} 
	} 
	return mySubFolders; 
} 
// Check how many times the link was placed 
function LinkUsage(myLink) { 
	var myLinkCounter = 0; 
		for (var c =  0; c < myDoc.links.length; c++) { 
		if (myLink.filePath == myDoc.links[c].filePath) { 
			myLinkCounter += 1; 
		} 
	} 
	return myLinkCounter 
} 
// Relink the links placed more than once 
function processMultiUsedLinks() { 
	var myCounter = 1; 
	var myMultiUsedLink = new Array(); 
	for (var d = 0; d < myLinks.length; d++)  { 
		if (myLinks[d].filePath == myLink.filePath) { 
			myMultiUsedLink.push(myLinks[d]); 
		} 
	} 
	for (e = myMultiUsedLink.length-1; e >= 0 ; e--) { 
		if (myMultiUsedLink[e].extractLabel("relinked") != "yes") { 
			if (myInDesignVersion >= 5) { 
				txt.text = String("Relinking file - " + myLink.name + " (" + myCounter + " of " + myMultiUsedLink.length + ")"); 
			} 
			main(myMultiUsedLink[e], mySubFolder); 
			myCounter++; 
		} 
	} 
} 
// Clear labels in case this script has been already run on the current document 
function crearLabels() { 
	for (var f =  0; f < myDoc.links.length; f++) { 
		if (myDoc.links[f].extractLabel("relinked") != "") { 
			myDoc.links[f].insertLabel("relinked", ""); 
		} 
	} 
}