<?php if ( ! defined( 'ABSPATH' ) ) exit;
/**
* Class NF_Updates_CacheCollateCleanup
*
* This class manages the step process of running through the CacheCollateCleanup required update.
* It will define an object to pull data from (if necessary) to pick back up if exited early.
* It will then step over each table in our structure and ensure that orphan records are removed from storage.
* It will then step over all submissions, removing any orphans.
* It will then step over all submissions (by form), updating or removing any orphan field records.
* After completing the above for every form on the site, it will remove the data object that manages its location.
*/
class NF_Updates_CacheCollateCleanup extends NF_Abstracts_RequiredUpdate
{
private $data = array();
private $running = array();
/**
* The denominator object for calculating our steps.
* @var Integer
*/
private $divisor = 500;
private $stage;
private $stage_complete = false;
/**
* Constructor
*
* @param $data (Array) The data object passed in by the AJAX call.
* @param $running (Array) The array of required updates being run.
*
* @since 3.4.0
*/
public function __construct( $data = array(), $running )
{
// Build our arguments array.
$args = array(
'slug' => 'CacheCollateCleanup',
'class_name' => 'NF_Updates_CacheCollateCleanup',
'debug' => false,
);
$this->data = $data;
$this->running = $running;
// Call the parent constructor.
parent::__construct( $args );
// Begin processing.
$this->process();
}
/**
* Function to loop over the batch.
*
* @since 3.4.0
*/
public function process()
{
// If we've not already started...
if ( ! isset( $this->running[ 0 ][ 'running' ] ) ) {
// Run our startup method.
$this->startup();
}
$this->stage = $this->running[ 0 ][ 'stages' ][ 0 ];
// Determine what process to run.
switch ( $this->stage[ 'table' ] ) {
case 'submissions':
// If we've cleaned out all orphan submissions...
if ( $this->stage[ 'purged' ] ) {
// Work on clearing out orphan field records.
$this->adopt_fields();
} // Otherwise... (We still have orphan submissions.)
else {
// Remove orphan submissions.
$this->adopt_subs();
}
break;
default:
// If we need to step over this process...
if ( $this->divisor < $this->stage[ 'parent_total' ] ) {
// Call stepped deletion.
$this->do_step_delete();
} // Otherwise... (We don't need to step over this.)
else {
// Call simple deletion.
$this->do_easy_delete();
}
// Increment our step count.
$this->running[ 0 ][ 'current' ] += 1;
break;
}
// If we have completed the current stage...
if ( $this->stage_complete ) {
// Remove it from our list.
array_shift( $this->running[ 0 ][ 'stages' ] );
} // Otherwise... (We have not completed the stage)
else {
// Record our changes.
$this->running[ 0 ][ 'stages' ][ 0 ] = $this->stage;
}
// Prepare to output our number of steps and current step.
$this->response[ 'stepsTotal' ] = $this->running[ 0 ][ 'steps' ];
$this->response[ 'currentStep' ] = $this->running[ 0 ][ 'current' ];
// If we have no stages left...
if ( empty( $this->running[ 0 ][ 'stages' ] ) ) {
// Run our cleanup method.
$this->cleanup();
}
// Prepare to output the number of updates remaining.
$this->response[ 'updatesRemaining' ] = count( $this->running );
// Record our current location in the process.
update_option( 'ninja_forms_doing_required_updates', $this->running );
// Respond to the AJAX call.
$this->respond();
}
/**
* Function to run any setup steps necessary to begin processing.
*
* @since 3.4.0
*/
public function startup()
{
// Record that we're processing the update.
$this->running[ 0 ][ 'running' ] = true;
// Get the number of records in the forms table.
$form_count = $this->get_total( 'nf3_forms' );
// Get the number of records in the fields table.
$action_count = $this->get_total( 'nf3_actions' );
// Get the number of records in the actions table.
$field_count = $this->get_total( 'nf3_fields' );
// Get the number of records in the objects table.
$object_count = $this->get_total( 'nf3_objects' );
// Get all form_ids from the db for the submissions portion.
$sql = "SELECT `id` FROM `{$this->db->prefix}nf3_forms`";
$forms = $this->db->get_results( $sql, 'ARRAY_A' );
$stages = array(
array(
'table' => $this->db->prefix . 'nf3_form_meta',
'parent' => $this->db->prefix . 'nf3_forms',
'parent_total' => $form_count,
),
array(
'table' => $this->db->prefix . 'nf3_actions',
'parent' => $this->db->prefix . 'nf3_forms',
'parent_total' => $form_count,
),
array(
'table' => $this->db->prefix . 'nf3_action_meta',
'parent' => $this->db->prefix . 'nf3_actions',
'parent_total' => $action_count,
),
array(
'table' => $this->db->prefix . 'nf3_fields',
'parent' => $this->db->prefix . 'nf3_forms',
'parent_total' => $form_count,
),
array(
'table' => $this->db->prefix . 'nf3_field_meta',
'parent' => $this->db->prefix . 'nf3_fields',
'parent_total' => $field_count,
),
array(
'table' => $this->db->prefix . 'nf3_object_meta',
'parent' => $this->db->prefix . 'nf3_objects',
'parent_total' => $object_count,
),
array(
'table' => 'submissions',
'parent_total' => $form_count,
'purged' => false,
'forms' => $forms,
),
);
$add = 0;
// Set the steps for form meta (enforcing a minimum step count).
$add = ceil( $form_count / $this->divisor );
$steps = ( 0 == $add ) ? 1 : $add;
// Add actions and fields.
$steps *= 3;
// Add action meta (enforcing a minimum step count).
$add = ceil( $action_count / $this->divisor );
$add = ( 0 == $add ) ? 1 : $add;
$steps += $add;
// Add field meta (enforcing a minimum step count).
$add = ceil( $field_count / $this->divisor );
$add = ( 0 == $add ) ? 1 : $add;
$steps += $add;
// Add object meta (enforcing a minimum step count).
$add = ceil( $object_count / $this->divisor );
$add = ( 0 == $add ) ? 1 : $add;
$steps += $add;
// Add one plus the form count for submissions (enforcing a minimum step count).
$add = $form_count + 1;
$add = ( 1 == $add ) ? 2 : $add;
$steps += $add;
$this->running[ 0 ][ 'stages' ] = $stages;
// Record the total number of steps in this batch.
$this->running[ 0 ][ 'steps' ] = $steps;
// Record our current step (defaulted to 0 here).
$this->running[ 0 ][ 'current' ] = 0;
}
/**
* Function to cleanup any lingering temporary elements of a required update after completion.
*
* @since 3.4.0
*/
public function cleanup()
{
// Remove the current process from the array.
array_shift( $this->running );
// Record to our updates setting that this update is complete.
$this->confirm_complete();
// If we have no updates left to process...
if ( empty( $this->running ) ) {
// Call the parent cleanup method.
parent::cleanup();
}
}
/**
* Function to get the number of objects in a table.
*
* @param $table (String) The name of the target table.
*
* @return (Int) The count of rows.
*
* @since 3.4.0
*/
public function get_total( $table )
{
$sql = "SELECT COUNT( `id` ) AS Total FROM `{$this->db->prefix}{$table}`;";
$result = $this->db->get_results( $sql, 'ARRAY_A' );
return intval( $result[ 0 ][ 'Total' ] );
}
/**
* Function to perform a simple, single-step delete of orphan data.
*
* @since 3.4.0
* @updated 3.4.11
*/
private function do_easy_delete()
{
// Remove the orphan records.
$sql = "DELETE FROM `{$this->stage[ 'table' ]}`
WHERE `parent_id` NOT IN(
SELECT `id` FROM `{$this->stage[ 'parent' ]}`
)";
// Protect favorite fields from being removed.
if ( false !== strpos( $this->stage[ 'table' ], 'nf3_fields' ) ) {
$sql .= " AND `parent_id` <> 0";
}
$this->query( $sql );
// Confirm that this stage is complete.
$this->stage_complete = true;
}
/**
* Function to perform a multi-step delete of orphan data.
*
* @since 3.4.0
* @updated 3.4.11
*/
private function do_step_delete()
{
// Get records from our table.
$sub_sql = "SELECT DISTINCT( `parent_id` ) AS id FROM `{$this->stage[ 'table' ]}` ";
// If we have a previous last record...
if ( isset( $this->stage[ 'last' ] ) ) {
// Make sure we exclude anything before it from the result.
$sub_sql .= "WHERE `parent_id` > " . $this->stage[ 'last' ] . " ";
} // Protect favorite fields from being removed.
elseif ( false !== strpos( $this->stage[ 'table' ], 'nf3_fields' ) ) {
$sub_sql .= "WHERE `parent_id` <> 0 ";
}
$sub_sql .= "ORDER BY `parent_id` ASC
LIMIT {$this->divisor};";
$result = $this->db->get_results( $sub_sql, 'ARRAY_A' );
// Get the last affected row.
$last = end( $result );
// Squash our results to get a non-associative array.
$result = $this->array_squash( $result );
$this->stage[ 'last' ] = intval( $last[ 'id' ] );
// Get records from the parent table.
$sql = "SELECT `id` FROM `{$this->stage[ 'parent' ]}`
WHERE `id` IN(" . implode( ', ', $result ) .
");";
$parent_result = $this->db->get_results( $sql, 'ARRAY_A' );
// If we didn't get the same number of results...
if ( count( $result ) !== count( $parent_result ) ) {
// Merge our results.
$result = array_merge( $result, $parent_result );
// Convert the array to something we can sort by duplicates.
$temp = array_count_values( array_column( $result, 'id' ) );
// Get rid of all values that had more than 1 result.
$temp = array_filter( $temp, array( $this, 'uniquify' ) );
// Schedule all of the single result values for deletion.
$delete = implode( ', ', array_keys( $temp ) );
$sql = "DELETE FROM `{$this->stage[ 'table' ]}`
WHERE `parent_id` IN( {$delete} );";
$this->query( $sql );
}
// If we've not already determined the limit of this table...
if ( ! isset( $this->stage[ 'max' ] ) ) {
// Fetch the maximum value.
$sql = "SELECT MAX( `parent_id` ) as target FROM `{$this->stage[ 'table' ]}`";
$result = $this->db->get_results( $sql, 'ARRAY_A' );
// Save a reference to it.
$this->stage[ 'max' ] = intval( $result[ 0 ][ 'target' ] );
}
// If our last record is equal to our maximum record...
if ( $this->stage[ 'last' ] == $this->stage[ 'max' ] ) {
// Record that we're done with this stage.
$this->stage_complete = true;
}
}
/**
* Function called by array_filter to remove ALL duplicate results.
*
* @param $v (Int) The number of results.
*
* @return (Boolean)
*
* @since 3.4.0
*/
private function uniquify( $v )
{
// If we have 1 result, keep it.
return $v == 1;
}
/**
* Function to remove orphan submissions from the posts and postmeta tables.
*
* @since 3.4.0
*/
private function adopt_subs()
{
// Fetch a limited number of orphan subs to delete.
$sub_sql = "SELECT m.post_id AS id from `{$this->db->prefix}postmeta` AS m
LEFT OUTER JOIN `{$this->db->prefix}posts` AS p
ON m.post_id = p.id
WHERE m.meta_key = '_form_id'
AND p.post_type = 'nf_sub'
AND m.meta_value NOT IN(
SELECT `id` from `{$this->db->prefix}nf3_forms`
)
ORDER BY m.post_id ASC
LIMIT {$this->divisor};";
$result = $this->db->get_results( $sub_sql, 'ARRAY_A' );
// Count them.
$count = count( $result );
// Squash our results to get a non-associative array.
$result = $this->array_squash( $result );
// If we have records to be deleted...
if ( 0 < $count ) {
// Remove their postmeta.
$sql = "DELETE FROM `{$this->db->prefix}postmeta`
WHERE post_id IN(" . implode( ', ', $result ) . ");";
$this->query( $sql );
// Remove the posts.
$sql = "DELETE FROM `{$this->db->prefix}posts`
WHERE id IN(" . implode( ', ', $result ) . ");";
$this->query( $sql );
}
// If the number of affected rows was less than our divisor...
if ( $count < $this->divisor ) {
// Mark that we've completed the process.
$this->stage[ 'purged' ] = true;
// Increment our step count.
$this->running[ 0 ][ 'current' ] += 1;
}
}
/**
* Function to remove orphan field data that's still attached
* to valid submissions from the postmeta table.
*
* @since 3.4.0
*/
private function adopt_fields()
{
// Get the form to work with.
$form = array_pop( $this->stage[ 'forms' ] );
// Fetch meta rows that match our criteria.
$sql = "SELECT r.meta_id, r.meta_key AS field_id
FROM `{$this->db->prefix}posts` AS p
LEFT JOIN `{$this->db->prefix}postmeta` AS r
ON r.post_id = p.id
LEFT JOIN `{$this->db->prefix}postmeta` AS f
ON f.post_id = p.id
WHERE p.post_type = 'nf_sub'
AND f.meta_key = '_form_id'
AND f.meta_value = " . intval( $form[ 'id' ] ) . "
AND r.meta_key LIKE '_field_%' ";
// If last is set...
if ( isset( $form[ 'last' ] ) ) {
// Make sure we're getting new results instead of old ones.
$sql .= "AND r.meta_id > {$form[ 'last' ]} ";
}
$sql .= "ORDER BY r.meta_id ASC
LIMIT {$this->divisor};";
$results = $this->db->get_results( $sql, 'ARRAY_A' );
// Count them.
$count = count( $results );
// Get the last result.
if ( 0 < $count ) {
$last = end( $results );
$last = $last[ 'meta_id' ];
reset( $results );
}
// Get all fields associated with this form.
$sql = "SELECT id FROM `{$this->db->prefix}nf3_fields` WHERE parent_id = " . intval( $form[ 'id' ] ) . ";";
$fields = $this->db->get_results( $sql, 'ARRAY_A' );
// Squash our results to get a non-associative array.
$fields = $this->array_squash( $fields );
$bad_records = array();
// For each result...
foreach( $results as $result ) {
// Pull the text out of our meta.
$id = str_replace( '_field_', '', $result[ 'field_id' ] );
$id = intval( $id );
// If this field isn't on the form...
if ( ! in_array( $id, $fields ) ) {
// Add it to our list to check later.
$bad_records[ $id ][] = $result[ 'meta_id' ];
}
}
// Get a list of any old_field_ids from our field table update.
$sql = "SELECT f.id AS new_id, m.meta_value AS id
FROM `{$this->db->prefix}nf3_fields` AS f
LEFT JOIN `{$this->db->prefix}nf3_field_meta` AS m
ON f.id = m.parent_id
WHERE f.parent_id = " . intval( $form[ 'id' ] ) . "
AND m.meta_key = 'old_field_id';";
$old_ids = $this->db->get_results( $sql, 'ARRAY_A' );
// Squash our results to get an associative array.
$old_ids = $this->array_squash( $old_ids );
// For each id in the bad records list...
foreach ( $bad_records as $field => $meta ) {
// If we have a new ID for that record...
if ( isset( $old_ids[ $field ] ) ) {
// Update our submissions.
$sql = "UPDATE `{$this->db->prefix}postmeta`
SET `meta_key` = '_field_" . $old_ids[ $field ] . "'
WHERE `meta_id` IN(" . implode( ', ', $meta ) . ");";
$this->query( $sql );
} // Otherwise... (We don't have a new ID for it.)
else {
// Delete the orphan record.
$sql = "DELETE FROM `{$this->db->prefix}postmeta`
WHERE `meta_id` IN(" . implode( ', ', $meta ) . ");";
$this->query( $sql );
}
}
// If the number of affected rows was less than our divisor...
if ( $count < $this->divisor ) {
// Increment our step count.
$this->running[ 0 ][ 'current' ] += 1;
} // Otherwise... (We need to continue.)
else {
// Record where we stopped.
$form[ 'last' ] = intval( $last );
// Put our form back on the stack.
array_push( $this->stage[ 'forms' ], $form );
}
// If there are no forms left to process...
if ( empty( $this->stage[ 'forms' ] ) ) {
// Mark that this stage is done.
$this->stage_complete = true;
}
}
/**
* Function to compress our db results into a more useful format.
*
* @param $data (Array) The result to be compressed.
*
* @return (Array) Associative if our data was complex.
* Non-associative if our data was a single item.
*
* @since 3.4.0
*/
private function array_squash( $data )
{
$response = array();
// For each item in the array...
foreach ( $data as $row ) {
// If the item has more than 1 attribute...
if ( 1 < count( $row ) ) {
// Assign the data to an associated result.
$response[ $row[ 'id' ] ] = $row;
// Unset the id setting, as that will be the key.
unset( $response[ $row[ 'id' ] ][ 'id' ] );
} // Otherwise... (We only have 1 attribute.)
else {
// Add the id to the stack in a non-associated result.
$response[] = intval( $row[ 'id' ] );
}
}
return $response;
}
}
كتبت شروق عارفمع التطور السريع للتكنولوجيا وتزايد اعتمدنا على الإنترنت في مختلف المجالات برز الطب عن بعد كأحد أهم التحولات في مجال الرعاية الصحية خصوصا بعد جائحة كورونا التي فرضت واقع جديد يحتم علينا العزلة مما دفعنا للبحث عن بدائل أمنة وفعالة للتشخيص والعلاج دون الحاجة لزيارة الطبيب ورغم ما يقدمه الطب عن بعد من من عدة حلول أهمها تقليل النفقات والحد من الازدحام ولكن مع هذا التطور بدأت تظهر تساؤلات مهمة أبرزهم هل يمكن الاعتماد عليه كبديل كامل للفحص التقليدي؟ وهل يضمن دقة التشخيص وكفاءة العلاج؟ أم أنه يظل أداة مساعدة مهمة لكنها لا تغني عن التواصل المباشر مع الطبيب في عيادته؟
الطب عن بعد دعم مكمل لا بديل
صرح أحد الأطباء بأن الطب عن بعد يمكن أن يكون فعالا جدا في بعض الحالات مثل متابعة الأمراض المزمنة أو إعطاء نصائح أولية لكنه لا يمكن أن يحل محل الفحص وتابع حديثه قائلا هناك تفاصيل لا يمكن معرفتها من خلال شاشة الهاتف مثل نبض القلب أو ملامح التعب أو بعض التغيرات وهذه أمور لا تظهر عبر الكاميرا كما وأوضح أن الطب عن بعد ساهم في تقليل الضغط على المستشفيات وساعد في تقليل العدوى لكنه لا يمكن أن يعتمد عليه بشكل أساسي الأسنان لا تفحص عن بعد
من جانبه صرح أحد الأطباء في جراحة الفم والأسنان أن الطب عن بعد لا يصلح في تخصص مثل الأسنان وذلك لاعتمادها الكبير على الفحص اليدوي والرؤية الدقيقة للحالة وأضاف كيف يمكنني أن اشخص التهاب في اللثة أو كسر في السن عبر شاشة هناك تفاصيل لا ترى إلا بالفحص المباشر سواء من خلال الأشعة أو أدوات الكشف الدقيقة وتابع قائلا الطب عن بعد قد يكون مفيد فقط في الاستشارة الأولية أو متابعة بعض الحالات البسيطة بعد العلاج لكن لا يمكن الاعتماد عليه في تشخيص أو وضع خطة علاجية دون معاينة فعلية
وأشار محذرا أن الطب عن بعد في مجال طب الأسنان قد يكون خطر وذلك لأن أي خطأ في التشخيص قد يؤدي إلى مضاعفات صحية للمريض موكدا أن التقنية تظل أداة مساعدة وليست بديلا عن الطبيب
ومن جانبه يؤكد أن التواصل المباشر بين الطبيب والمريض هو عنصر أساسي في طب الأسنان موضح أن بعض الأعراض قد لا تفهم بشكل دقيق إلا من خلال تفاعل مباشر وتابع حديثه قائلا حتى مع توفر صور أو مقاطع فيديو يظل هناك فارق كبير بين ما يرى عبر الشاشة وما يمكن للطبيب ملاحظته أثناء الكشف
ويبقى الطب عن بعد أداة فعالة في تحسين الوصول إلى خدمات الرعاية الصحية لكنه في النهاية يظل وسيلة مساعدة لا تغني عن دور الطبيب والفحص المباشرة
