Support nested levels/use of content include tags

[sid3windr]

Describe the bug
Multiple layers of page inclusion are not being evaluated correctly.

Steps To Reproduce
Steps to reproduce the behavior:

1. Create page A with some content.
2. Create page B with some content, and include page A in it. This will display correctly.
3. Create page C with some content, and include page B in it.
4. Page C will have the page C content from step 3, and the page B content from step 2, followed by the {{@123}} inclusion tag for page A, instead of page A's content.

Expected behavior
All pages to be included should be displayed correctly.

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): 21.04
• PHP Version: 7.3.29
• Hosting Method (Nginx/Apache/Docker): Apache

[ssddanbrown]

Related to #1601

[robertfshort]

+1 for this feature

[JoeIzzard]

+1 for this

[jasonF1000]

+1 for this feature

[deleyva]

+1 for this feature

[jasonF1000]

Hi,

i think a depth of 3 layers for the page inclusion should be enoght for the most cases.
Is there any implementation Plan in the near Future for this Feature?

Regards,
jason

[ssddanbrown]

Up to three levels of nested has now been added within the work of PR #4192, thanks to @jasonF1000.
Will be part of the next feature release.