Architecture

bx_srv('system', 'is_module_profile', $sModuleName)
bx_srv('system', 'is_module_context', $sModuleName)
bx_srv('system', 'is_module_content', $sModuleName)

BxBaseModGeneralModule extends BxDolModule
BxBaseModGroupsModule extends BxBaseModProfileModule
BxBaseModNotificationsModule extends BxBaseModGeneralModule
BxBaseModProfileModule extends BxBaseModGeneralModule implements iBxDolContentInfoService, iBxDolProfileService
BxBaseModTextModule extends BxBaseModGeneralModule implements iBxDolContentInfoService

bx_srv('module', 'method', [...])

public function serviceGetProfileInfo($iProfileId)
{
    return $aProfileInfo;
}

$aProfileInfo = bx_srv('profiles', 'get_profile_info', [$iProfileId]);

bx_alert('type', 'action', $objectId, $profileId)

bx_alert('bx_posts', 'add', $iPostId, $iProfileId, [
    'content' => $sContent,
    'title' => $sTitle,
    'module' => $this->_oConfig->getName()
]);

{
    "code": 0,
    "message": "Success",
    "data": {}
}