hook_requirements

336 function hfc_wwusa_requirements($phase) {
337   $requirements = array();
338   // Ensure translations don't break during installation.
339   $t = get_t();
340   drupal_set_message('hfc_wwusa_requirements() fired');
341
342   if($phase == 'update') {
343     drupal_set_message('$phase was "update"');
344
345     if(!module_exists('flag')) {
346       $requirements['flag'] = array(
347         'title'       => 'flag',
348         'value'       => $t('Not installed'),
349         'description' => $t('Flag module is required for this version of HFC WWUSA'),
350         'severity'    => 'REQUIREMENT_ERROR',
351       );
352       drupal_set_message('Unmet dependency: flag');
353     }
354
355     if(!module_exists('rules')) {
356       $requirements['rules'] = array(
357         'title'       => 'rules',
358         'value'       => $t('Not installed'),
359         'description' => $t('Rules module is required for this version of HFC WWUSA'),
360         'severity'    => 'REQUIREMENT_ERROR',
361       );
362       drupal_set_message('Unmet dependency: rules');
363     }
364
365     if(!module_exists('hfc_wwusa_badges')) {
366       $requirements['hfc_wwusa_badges'] = array(
367         'title'       => 'hfc_wwusa_badges',
368         'value'       => $t('Not installed'),
369         'description' => $t('HFC WWUSA Badges module is required for this version of HFC WWUSA'),
370         'severity'    => 'REQUIREMENT_ERROR',
371       );
372       drupal_set_message('Unmet dependency: hfc_wwusa_badges');
373     }
374
375   }
376
377   drupal_set_message(count($requirements) . ' unmet dependencies!');
378   return $requirements;
379 }