Umbraco 8 - Prune existing Image Cropper and Media Picker (v3) values

PruneImageCropperPropertyDataComponent.cs

using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Umbraco.Core;
using Umbraco.Core.Composing;
using Umbraco.Core.PropertyEditors.ValueConverters;
using Umbraco.Core.Services;

public class PruneImageCropperPropertyDataComposer : ComponentComposer<PruneImageCropperPropertyDataComponent>
{ }

public class PruneImageCropperPropertyDataComponent : IComponent
{
    private readonly IMediaService mediaService;

    public PruneImageCropperPropertyDataComponent(IMediaService mediaService)
    {
        this.mediaService = mediaService;
    }

    public void Initialize()
    {
        for (int pageIndex = 0; ; pageIndex++)
        {
            var medias = mediaService.GetPagedDescendants(-1, pageIndex, 1000, out _).ToList();
            if (medias.Count == 0)
            {
                break;
            }

            foreach (var media in medias)
            {
                foreach (var property in media.GetPropertiesByEditor(Constants.PropertyEditors.Aliases.ImageCropper))
                {
                    var value = property.GetValue() as string;
                    if (string.IsNullOrEmpty(value) || value.DetectIsJson() == false)
                    {
                        continue;
                    }

                    var jsonValue = JObject.Parse(value);

                    // Clean up redundant/default values
                    ImageCropperValue.Prune(jsonValue);

                    property.SetValue(jsonValue.ToString(Formatting.None));
                }
            }

            // Media isn't versioned, so this replaces the existing value
            mediaService.Save(medias);
        }
    }

    public void Terminate()
    { }
}

PruneMediaPicker3PropertyDataComponent.cs

using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Umbraco.Core;
using Umbraco.Core.Composing;
using Umbraco.Core.PropertyEditors.ValueConverters;
using Umbraco.Core.Services;

public class PruneMediaPicker3PropertyDataComposer : ComponentComposer<PruneMediaPicker3PropertyDataComponent>
{ }

public class PruneMediaPicker3PropertyDataComponent : IComponent
{
    private readonly IContentService _contentService;

    public PruneMediaPicker3PropertyDataComponent(IContentService contentService)
    {
        _contentService = contentService;
    }

    public void Initialize()
    {
        for (int pageIndex = 0; ; pageIndex++)
        {
            var contents = _contentService.GetPagedDescendants(-1, pageIndex, 1000, out _).ToList();
            if (contents.Count == 0)
            {
                break;
            }

            foreach (var content in contents)
            {
                foreach (var property in content.GetPropertiesByEditor(Constants.PropertyEditors.Aliases.MediaPicker3))
                {
                    var value = property.GetValue() as string;
                    if (string.IsNullOrEmpty(value) || value.DetectIsJson() == false)
                    {
                        continue;
                    }

                    var dtos = JArray.Parse(value);

                    // Clean up redundant/default values
                    foreach (var dto in dtos.Values<JObject>())
                    {
                        ImageCropperValue.Prune(dto);
                    }

                    property.SetValue(dtos.ToString(Formatting.None));
                }
            }

            // This only saves a new version: make sure to publish and cleanup old versions yourself
            _contentService.Save(contents);
        }
    }

    public void Terminate()
    { }
}