CiviCase business logic

Actions:

• adding new case (happens only in context of selected contact record)
• removing the case (does not physically remove associated contact or activities)
• attaching activity record to the case (belongs to activity management functionality!)
• disattaching activity record from the case (belongs to activity management functionality!)
• search by all fields

Remarks:

• Attaching activity record to the case happens through activity adding screen

Special attributes provided by civicrm_log:

• Field: created_date - handled through civicrm_log, first entry
• Field: created_user - handled through civicrm_log, first entry
• Field: modified_date - handled through civicrm_log, last entry
• Field: modified_user - handled through civicrm_log, last entry