How to detective SiteSettings change

[hyzx86]

I want to implement a module that can audit SiteSettings's changes

The plan is:

1. Replace SiteService

2. When each CustomSettings update is detected, compare the data in the database with the incoming data

3. If a discrepancy is found, save it to the audit log

    public async Task UpdateSiteSettingsAsync(ISite site)
    {
        var inputSettings = site as SiteSettings;
        await GetChangeLog(inputSettings);
        await _documentManager.UpdateAsync(inputSettings);
    }

    private async Task<JObject> GetChangeLog(SiteSettings inputSettings)
    {
        //
        var settingsFromDb = await _service.LoadSiteSettingsAsync();
        var changedList = new Dictionary<string, JToken>();
        foreach (var property in inputSettings.Properties)
        {
            if (!settingsFromDb.Properties.ContainsKey(property.Key))
            {
                changedList.Add(property.Key, property.Value);
            }
            else
            {
                var currentProp = settingsFromDb.Properties.SelectToken(property.Key);
                if (!JToken.DeepEquals(property.Value, currentProp))
                {
                    changedList.Add(property.Key, property.Value);
                }
            }
        }

        return null;
    }

But now there have a problem:

The SiteSettings I get using the siteService.LoadSiteSettingsAsync() method is always the updated data,

Can't get pre update data?

Maybe I realized it in the wrong way?

[hyzx86]

Done

More appropriate through IContentHandler