Features for new blog guide: tag selection, restricted sub_pages, min img dim, content editor selectors, content editor loaded event

[mickenorlen]

I have a couple of features I would like to have for the new multi page blog guide. AlchemyCMS/alchemy-guides#98. I'm just gonna gather them here for now (in no particular order). Any help/feedback with this is ofc appreciated.

1. Restricted sub paging for page_layouts (Add support for parent and child page restrictions in page_layout definition #1776). Eg:

- name: blog
  sub_pages: 'blog_post'

- name: blog_post
  parent_pages: 'blog'
  sub_pages: false # no sub_pages can be created

2. Tag selection essence. Simlilar to https://guides.alchemy-cms.com/essences.html#essencepage-available-since-alchemy-4-4. So users can select which categories of posts they want to show.

Update. I'm not gonna do this as it's not so important for me.

3. Minimum img dimension validation. To make sure images in lists etc are always same size. Would also be useful in general eg for banner images. Example:

Update. This was so easy so i think im just gonna use this an example of how to add validations in the docs instead.

- name: 'blog_post'
  contents:
      - name: main_image
      type: EssencePicture
      settings:
        size: '1280x720'
        crop: true
      validate:
      - min_size: '1280x720'

4. Unique targetable content editor selectors. So css/js can manipulate different sections easier. Done Add content editor data attributes based on name/id and css_classes presenter method #1761

5. Content editor loaded event
   Closed: Add element editor loaded event #1766

[tvdeyen]

Interesting things in here.

I am wry interested in the EssenceTag. This is a nice idea.

[mickenorlen]

Closing this as whats left has their own respective issues/PRs anyway