using Sitecore.Buckets.Managers;
using Sitecore.Buckets.Util;
using Sitecore.Data;
using Sitecore.Data.Items;
using Sitecore.Events;
using System;
using System.Text.RegularExpressions;

namespace Custom.Events.ItemSaved
{
    public class ReorganizeBucketedItemInBucket
    {
        public void OnItemSaved(object sender, EventArgs args)
        {
            var bucketedItem = Event.ExtractParameter(args, 0) as Item;

            // If we don't have an item or we're not saving in the master DB, ignore this save
            if (bucketedItem == null || !"master".Equals(bucketedItem.Database?.Name, StringComparison.OrdinalIgnoreCase))
                return;

            if (!bucketedItem.TemplateID.Equals(new ID("{bucketed-item-template-id}"))) return;

            var itemChanges = Event.ExtractParameter(args, 1) as ItemChanges;

            // If there were no changes or the changes didn't include the date field, ignore this save
            if (itemChanges == null || !itemChanges.HasFieldsChanged || !itemChanges.IsFieldModified(new ID("{field-id-of-date-field}")))
                return;

            Item bucketItem = bucketedItem.Axes.SelectSingleItem($"{EscapePath(bucketedItem.Paths.FullPath)}/ancestor-or-self::*[@@templateid = '{{bucket-container-template-id}}']");

            // If this item isn't in a bucket (or is in a bucket of another, unexpected type), ignore it
            if (bucketItem == null) return;

            Item parent = bucketedItem.Parent;
            BucketManager.MoveItemIntoBucket(bucketedItem, bucketItem);

            // Delete empty ancestor bucket folders
            while (parent != null && !parent.HasChildren && parent.TemplateID == BucketConfigurationSettings.BucketTemplateId)
            {
                Item tempParent = parent.Parent;
                parent.Delete();
                parent = tempParent;
            }
        }

        /// <summary>
        /// Wraps each segment of a sitecore path with "#"'s
        /// </summary>
        public string EscapePath(string path)
        {
            return Regex.Replace(path, @"([^/]+)", "#$1#").Replace("#*#", "*");
        }
    }
}

using Sitecore.Buckets.Managers;
using Sitecore.Buckets.Util;
using Sitecore.Data;
using Sitecore.Data.Items;
using Sitecore.Events;
using System;
using System.Text.RegularExpressions;

namespace Custom.Events.ItemSaved
{
    public class ReorganizeBucketedItemInBucket
    {
        public void OnItemSaved(object sender, EventArgs args)
        {
            var bucketedItem = Event.ExtractParameter(args, 0) as Item;

            // If we don't have an item or we're not saving in the master DB, ignore this save
            if (bucketedItem == null || !"master".Equals(bucketedItem.Database?.Name, StringComparison.OrdinalIgnoreCase))
                return;

            if (!bucketedItem.TemplateID.Equals(new ID("{bucketed-item-template-id}"))) return;

            var itemChanges = Event.ExtractParameter(args, 1) as ItemChanges;

            // If there were no changes or the changes didn't include the date field, ignore this save
            if (itemChanges == null || !itemChanges.HasFieldsChanged || !itemChanges.IsFieldModified(new ID("{field-id-of-date-field}")))
                return;

            Item bucketItem = bucketedItem.GetParentBucketItemOrParent();

            // If this item isn't in a bucket (or is in a bucket of another, unexpected type), ignore it
            if (bucketItem == null) return;

            Item parent = bucketedItem.Parent;
            BucketManager.MoveItemIntoBucket(bucketedItem, bucketItem);

            // Delete empty ancestor bucket folders
            while (parent != null && !parent.HasChildren && parent.TemplateID == BucketConfigurationSettings.BucketTemplateId)
            {
                Item tempParent = parent.Parent;
                parent.Delete();
                parent = tempParent;
            }
        }
    }
}