Finding Default Save Path for Photoshop .PSD Documents via JavaScript

I see your point now, great idea!

Here's the code for the main script:

if (app && app.documents.length > 0) {
	
	main();
	
}

else {
		alert("Please open a document in Photoshop to use this script.");
	}

function main() {

var savedPathGlobal = "";

function saveFolderPathToFile() {
    // Get the directory of the currently executing script
    var scriptFile = File($.fileName);
    var scriptFolder = scriptFile.parent;

    // Create a reference to the text file
    var infoFile = new File(scriptFolder.fullName + "/selectedFolderPath.txt");

    // Check if the text file doesn't exist or is empty
    if (!infoFile.exists || infoFile.length == 0) {
        // Select a folder to save files
        var saveFolder = Folder.selectDialog("Select a folder to save your file");

        if (saveFolder) {
            // Get the selected folder's path
            var savedPath = saveFolder.fsName;

            // Open the text file for writing
            infoFile.open("w");
            infoFile.encoding = "UTF-8"; // Set the encoding to handle non-ASCII characters
            infoFile.writeln(savedPath);
            infoFile.close();
            savedPathGlobal = savedPath + "\\";

            // Display an alert with the selected folder path
            alert("Selected folder path:\n" + savedPath + "\nPath saved to:\n" + infoFile.fsName);
        } else {
            alert("Folder selection was canceled.");
        }
    } else {
        // If the text file exists and is not empty, use the stored path
        infoFile.open("r"); // Open the text file for reading
        savedPathGlobal = infoFile.readln() + "\\"; // Read the saved path
        infoFile.close(); // Close the text file
        //alert("Using the previously saved folder path:\n" + savedPathGlobal);
    }
}


// Call the function to run the script
saveFolderPathToFile();


// Define the folder path
var folderPath = savedPathGlobal;

// Get the current document's name
var currentDocumentName = app.activeDocument.name;

// Check if the current document's name exists in the folder
var fileExists = false;

// Initialize variables for finding the largest number
var largestNumber = 0;

// Open a folder object
var folder = new Folder(folderPath);

// Get a list of all files in the folder
var fileList = folder.getFiles();

// Loop through the files to check if the current document's name exists
for (var i = 0; i < fileList.length; i++) {
    var file = fileList[i];

    // Check if the file is a PSD with the same name
    if (file instanceof File && file.name === currentDocumentName) {
        fileExists = true;
        break;
    }

    // Check if the file is a PSD with the name pattern "Untitled-X.psd"
    if (file instanceof File && file.name.match(/^Untitled-(\d+)\.psd$/)) {
        var match = file.name.match(/^Untitled-(\d+)\.psd$/);
        var number = parseInt(match[1], 10);

        // Update the largest number if necessary
        if (number > largestNumber) {
            largestNumber = number;
        }
    }
}




// If the file exists in the folder, save the current document
if (fileExists) {
    app.activeDocument.save();
    //alert("The current document has been saved.");
} else {
    // Increment the largest number to get the next available number
    var nextNumber = largestNumber + 1;

    // Define the new filename
    var newFileName = "Untitled-" + nextNumber + ".psd";

    // Save the current document with the new filename
    var saveFile = new File(folderPath + newFileName);
    app.activeDocument.saveAs(saveFile);

    // Alert the user with the saved filename
    //alert("Saved as: " + newFileName);
}

}

And for the second one, which allows you to change the default save folder if needed:

function saveFolderPathToFile() {
	
    // Get the directory of the currently executing script
    var scriptFile = File($.fileName);
    var scriptFolder = scriptFile.parent;

    // Create a reference to the text file
    var infoFile = new File(scriptFolder.fullName + "/selectedFolderPath.txt");

    // Check if the text file doesn't exist or is empty
    
        // Select a folder to save files
        var saveFolder = Folder.selectDialog("Select the default save location folder");

        if (saveFolder) {
            // Get the selected folder's path
            var savedPath = saveFolder.fsName;

            // Open the text file for writing
            infoFile.open("w");
            infoFile.encoding = "UTF-8"; // Set the encoding to handle non-ASCII characters
            infoFile.writeln(savedPath + "\\");
            infoFile.close();
            savedPathGlobal = savedPath;

            // Display an alert with the selected folder path
            alert("Selected folder path:\n" + savedPath + "\nPath saved to:\n" + infoFile.fsName);
        } else {
            alert("Folder selection was canceled.");
        }
    
}


// Call the function to run the script
saveFolderPathToFile();

If anyone like me wants to use this, here's the tutorial on installing it:

1. Copy and paste the first code, put it in a .txt and rename it's extension to .jsx. Do the same to the second code.

For example, you can use names like FileSave.jsx and FileSaveFolder_Change.jsx, but feel free to choose different ones.

2. Open your photoshop folder -> Presets -> Scripts, put both scripts in this folder

3. Start(or restart if it is opened) Photoshop

4. Open a document

5. In top left corner there is File. Press it, find scripts, and there will be the two scripts you created

If you need to save files as Untitled-1, Untitled-2, -3 and so on - use the first script.
Whenever you need to change these files' save location, use the second script.

Feel free to bind them to any hotkeys!