Getting the Last File Added to a Directory (Folder)

Macro Library
,
4

In a JavaScript for Automation version (‘JXA’ in the minds of a few, though not in Apple’s documents :slight_smile: ) you can quite easily use JS itself to do the sorting.

(The NSURL keys are built-in properties of the $ object (ObjC.$)).

Example below, retrieving the AddedToDirectory and ContentModification dates, together with the TypeIdentifier. The sorting on AddedToDirectory is done in JS.

(function () {
    'use strict';

    var strPath = '~/Desktop'; // Choose the folder you want

    // lstKeys :: [$.Keys]   // Choose the keys you want
    var lstKeys = [
        $.NSURLAddedToDirectoryDateKey,
        $.NSURLContentModificationDateKey,
        $.NSURLTypeIdentifierKey
    ].map(ObjC.unwrap);

    // folderFilesWithKeyValues :: String -> [$.NSURLConstant] -> [Dictionary]
    var folderFilesWithKeyValues = function (strPath, lstKeys) {
        var fm = $.NSFileManager.defaultManager,
            oURL = $.NSURL.fileURLWithPathIsDirectory($(strPath)
                .stringByStandardizingPath, true);

        return ObjC.unwrap(
                fm.contentsOfDirectoryAtURLIncludingPropertiesForKeysOptionsError(
                    oURL, lstKeys, 1 << 2, null
                )
            )
            .map(function (x) {
                var dctProps = {
                    path: x.path.js
                };

                lstKeys.forEach(function (k) {
                    var ref = $();
                    x.getResourceValueForKeyError(ref, k, null);
                    dctProps[k.slice(5, -3)] = ref.js;
                });

                return dctProps;
            });
    };

    // GENERIC FUNCTIONS -----------------------------------------------------

    // show :: a -> String
    var show = function (x) {
        return JSON.stringify(x, null, 2);
    };

    // sortWith :: Ord b => (a -> b) -> [a] -> [a]
    var sortWith = function (f, xs) {
        return sortBy(compare(f), xs);
    };

    // sortBy :: (a -> a -> Ordering) -> [a] -> [a]
    var sortBy = function (f, xs) {
        return xs.sort(f);
    };

    // compare :: (a -> b) -> (a -> a -> Ordering)
    var compare = function (f) {
        return function(x, y) {
            var a = f(x),
                b = f(y);
            return a < b ? -1 : a > b ? 1 : 0
        };
    };
    
    

    // TEST ------------------------------------------------------------------
    return show(sortWith(function (x) {
            return x.AddedToDirectoryDate;
        }, folderFilesWithKeyValues(strPath, lstKeys))
        .map(function (x) {
            return [  // Return the path, and the attributes by key
                     //  (dropping 'NSURL' from start and 'key' from end)
                x.path,
                x.AddedToDirectoryDate,
                x.ContentModificationDate,
                x.TypeIdentifier
            ];
        }));
})();

Sample output:

[
  [
    "/Users/houthakker/Desktop/TP fixes",
    "2017-01-03T01:30:51.000Z",
    "2017-01-03T01:33:21.000Z",
    "public.folder"
  ],
  [
    "/Users/houthakker/Desktop/TuringTestTerritory2.pdf",
    "2017-01-04T22:46:31.000Z",
    "2017-01-04T22:46:31.000Z",
    "com.adobe.pdf"
  ],
  [
    "/Users/houthakker/Desktop/evenOdd.scpt",
    "2017-01-12T18:09:36.000Z",
    "2017-01-13T10:34:23.000Z",
    "com.apple.applescript.script"
  ],
  [
    "/Users/houthakker/Desktop/formatTest.zip",
    "2017-01-13T10:32:08.000Z",
    "2017-01-13T10:32:08.000Z",
    "public.zip-archive"
  ],
  [
    "/Users/houthakker/Desktop/formatTest.zip.cpgz",
    "2017-01-13T10:32:33.000Z",
    "2017-01-13T10:32:33.000Z",
    "com.apple.bom-compressed-cpio"
  ],
  [
    "/Users/houthakker/Desktop/compiled.scpt",
    "2017-01-13T10:46:09.000Z",
    "2017-01-13T10:46:09.000Z",
    "com.apple.applescript.script"
  ],
  [
    "/Users/houthakker/Desktop/sample.graffle",
    "2017-01-13T15:23:55.000Z",
    "2017-01-13T15:23:55.000Z",
    "com.omnigroup.omnigraffle.graffle"
  ]
]
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