1) Every certificate is a template. Before a user would create a certificate then had
the option to save it as a template. This could potentially be chaotic with numerous
users creating templates, making the template system a mess. Now, rather than creating
a certificate first, then saving it as a template, you are always creating a template.
Each template is associated with a context, so depending on where you are creating it
the context is different. This means users in the CONTEXT_MODULE context are creating
a template specific to that module, where as a user creating a template in the
CONTEXT_SYSTEM context would be creating a general template that can be used by others.
This meant we can remove the 'customcert_template_*' db tables. Yay - no duplicated
tables.
2) Created new helper classes and moved functionality there.
3) Moved files to classes/ for autoloading.
4) General tidy up.
The elements for each page are listed in a table below the other page settings, meaning each page has a separate table for listing their elements. Each element is now edited in a pop-up, rather than having all the element settings displayed at once on the form causing it to look overcrowded. There is also no longer any need for the function add_element to add default values for the elements when they are added, as a a form is shown when you click to add an element where you can enter the values before it is created.
Note: I did not create a db/upgrade.php script to add the new database columns as this module should not be currently used by anyone.
The render_common_form_elements function was removed in the base class and it's contents put into the render_form_element function. These changes mean that some elements may not be required to override the render_form_element function, such as the studentname element, where this function was removed.
Rather than using grouped elements which can span across multiple lines on a small screen, the elements are now generated within a header element, keeping them separated and making the form more manageable. The base class was also changed to accomodate this by making it easier for elements to utilise common features.
Elements are sub-plugins that have the same abilities as a core plugin, such as creating tables, capabilities and performing upgrades.
Currently elements can define -
* What additional form elements are rendered when adding the element to the customcert customisation page.
* How the data from the additional form elements is validated and saved.
* How the element is rendered on the PDF.
* How the element handles removing data when it is deleted.
