Ability to promote reference by marking them as sticky

Problem/Motivation

It would be great if there is an ability to promote a reference by marking it as sticky. Useful for highlighting and weightage.

Proposed resolution

Since, it would be tedious to add a boolean field (field_is_sticky) to every reference type, therefore it would be better if this is added as a property - similar to what node does.

Remaining tasks

N/A

User interface changes

There will be a new field called Sticky at top of lists while adding a reference.

API changes

For checking if a reference is sticky:

  /**
   * Returns the reference sticky status.
   *
   * @return bool
   *   TRUE if the reference is sticky.
   */
  public function isSticky();

For marking/unmarking a referece as sticky:

  /**
   * Sets the reference sticky status.
   *
   * @param bool $sticky
   *   TRUE to set this reference to sticky, FALSE to set it to not sticky.
   *
   * @return \Drupal\bibcite_entity\Entity\ReferenceInterface
   *   The called reference entity.
   */
  public function setSticky($sticky);

Data model changes

There will be a new column in bibcite_reference table called sticky.

Release notes snippet

N/A