delete_slack_files.js

/**
 * HOW TO USE:
 * 1. Go to: https://YOURTEAM.slack.com/files
 * 2. Open inspector for your browser.
 * 3. You'll see: 2017/6/6 22:16:45.834  User id: XXXXXXXXX, team id: XXXXXXXXX
 * 4. Paste user id in to where it says "USER_ID_HERE"
 * 5. Copy/paste this whole script to your console.
 */
/*global
    jQuery, TS
*/
(function () {
    "use strict";

    function deleteTimeout(fileID, time_to_wait) {
        console.log('Deleting ' + fileID + ' in ' + time_to_wait);

        setTimeout(function () {
            console.log('Deleting ' + fileID);
            TS.api.call('files.delete', {file: fileID}, function (success, data) {
                if (!success) {
                    console.error('files.delete: FAILED');
                    return;
                }

                console.log('files.delete', data);
            });
        }, time_to_wait);
    }

    TS.api.call('files.list', {user: 'USER_ID_HERE', count: 700}, function (success, data) {
        if (!success) {
            console.error('files.list: FAILED');
            return;
        }

        var i, file;

        for (i = 0; i < data.files.length; i += 1) {
            file = data.files[i];
            deleteTimeout(file.id, ((i + 1) * 100));
        }
    });
}());