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<?php
/**
* DB class.
*
* This handy class originated from Pippin's Easy Digital Downloads.
* https://github.com/easydigitaldownloads/easy-digital-downloads/blob/master/includes/class-edd-db.php
*
* Sub-classes should define $table_name, $version, and $primary_key in __construct() method.
*
* @since 1.1.6
*/
abstract class WPForms_DB {
/**
* Database table name.
*
* @since 1.1.6
*
* @var string
*/
public $table_name;
/**
* Database version.
*
* @since 1.1.6
*
* @var string
*/
public $version;
/**
* Primary key (unique field) for the database table.
*
* @since 1.1.6
*
* @var string
*/
public $primary_key;
/**
* Database type identifier.
*
* @since 1.5.1
*
* @var string
*/
public $type;
/**
* Retrieve the list of columns for the database table.
* Sub-classes should define an array of columns here.
*
* @since 1.1.6
*
* @return array List of columns.
*/
public function get_columns() {
return [];
}
/**
* Retrieve column defaults.
* Sub-classes can define default for any/all of columns defined in the get_columns() method.
*
* @since 1.1.6
*
* @return array All defined column defaults.
*/
public function get_column_defaults() {
return [];
}
/**
* Retrieve a row from the database based on a given row ID.
*
* @since 1.1.6
*
* @param int $row_id Row ID.
*
* @return null|object
*/
public function get( $row_id ) {
global $wpdb;
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching
return $wpdb->get_row(
$wpdb->prepare(
"SELECT * FROM $this->table_name WHERE $this->primary_key = %d LIMIT 1;", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
(int) $row_id
)
);
}
/**
* Retrieve a row based on column and row ID.
*
* @since 1.1.6
*
* @param string $column Column name.
* @param int|string $value Column value.
*
* @return object|null Database query result, object or null on failure.
*/
public function get_by( $column, $value ) {
global $wpdb;
if (
empty( $value ) ||
! array_key_exists( $column, $this->get_columns() )
) {
return null;
}
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching
return $wpdb->get_row(
$wpdb->prepare(
"SELECT * FROM $this->table_name WHERE $column = %s LIMIT 1;", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$value
)
);
}
/**
* Retrieve a value based on column name and row ID.
*
* @since 1.1.6
*
* @param string $column Column name.
* @param int|string $row_id Row ID.
*
* @return string|null Database query result (as string), or null on failure.
*/
public function get_column( $column, $row_id ) {
global $wpdb;
if ( empty( $row_id ) || ! array_key_exists( $column, $this->get_columns() ) ) {
return null;
}
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching
return $wpdb->get_var(
$wpdb->prepare(
"SELECT $column FROM $this->table_name WHERE $this->primary_key = %d LIMIT 1;", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
(int) $row_id
)
);
}
/**
* Retrieve one column value based on another given column and matching value.
*
* @since 1.1.6
*
* @param string $column Column name.
* @param string $column_where Column to match against in the WHERE clause.
* @param string $column_value Value to match to the column in the WHERE clause.
*
* @return string|null Database query result (as string), or null on failure.
*/
public function get_column_by( $column, $column_where, $column_value ) {
global $wpdb;
if (
empty( $column ) ||
empty( $column_where ) ||
empty( $column_value ) ||
! array_key_exists( $column_where, $this->get_columns() ) ||
! array_key_exists( $column, $this->get_columns() )
) {
return null;
}
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching
return $wpdb->get_var(
$wpdb->prepare(
"SELECT $column FROM $this->table_name WHERE $column_where = %s LIMIT 1;", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
$column_value
)
);
}
/**
* Insert a new record into the database.
*
* @since 1.1.6
*
* @param array $data Column data.
* @param string $type Optional. Data type context.
*
* @return int ID for the newly inserted record. 0 otherwise.
*/
public function add( $data, $type = '' ) {
global $wpdb;
// Set default values.
$data = (array) wp_parse_args( $data, $this->get_column_defaults() );
do_action( 'wpforms_pre_insert_' . $type, $data );
// Initialise column format array.
$column_formats = $this->get_columns();
// Force fields to lower case.
$data = array_change_key_case( $data );
// White list columns.
$data = array_intersect_key( $data, $column_formats );
// Reorder $column_formats to match the order of columns given in $data.
$data_keys = array_keys( $data );
$column_formats = array_merge( array_flip( $data_keys ), $column_formats );
$wpdb->insert( $this->table_name, $data, $column_formats );
do_action( 'wpforms_post_insert_' . $type, $wpdb->insert_id, $data );
return $wpdb->insert_id;
}
/**
* Insert a new record into the database. This runs the add() method.
*
* @see add()
*
* @since 1.1.6
*
* @param array $data Column data.
*
* @return int ID for the newly inserted record.
*/
public function insert( $data ) {
return $this->add( $data );
}
/**
* Update an existing record in the database.
*
* @since 1.1.6
*
* @param int|string $row_id Row ID for the record being updated.
* @param array $data Optional. Array of columns and associated data to update. Default empty array.
* @param string $where Optional. Column to match against in the WHERE clause. If empty, $primary_key
* will be used. Default empty.
* @param string $type Optional. Data type context, e.g. 'affiliate', 'creative', etc. Default empty.
*
* @return bool False if the record could not be updated, true otherwise.
*/
public function update( $row_id, $data = [], $where = '', $type = '' ) {
global $wpdb;
// Row ID must be a positive integer.
$row_id = absint( $row_id );
if ( empty( $row_id ) ) {
return false;
}
if ( empty( $where ) ) {
$where = $this->primary_key;
}
do_action( 'wpforms_pre_update_' . $type, $data );
// Initialise column format array.
$column_formats = $this->get_columns();
// Force fields to lower case.
$data = array_change_key_case( $data );
// White list columns.
$data = array_intersect_key( $data, $column_formats );
// Reorder $column_formats to match the order of columns given in $data.
$data_keys = array_keys( $data );
$column_formats = array_merge( array_flip( $data_keys ), $column_formats );
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching
if ( $wpdb->update( $this->table_name, $data, [ $where => $row_id ], $column_formats ) === false ) {
return false;
}
do_action( 'wpforms_post_update_' . $type, $data );
return true;
}
/**
* Delete a record from the database.
*
* @since 1.1.6
*
* @param int|string $row_id Row ID.
*
* @return bool False if the record could not be deleted, true otherwise.
*/
public function delete( $row_id = 0 ) {
global $wpdb;
// Row ID must be positive integer.
$row_id = absint( $row_id );
if ( empty( $row_id ) ) {
return false;
}
do_action( 'wpforms_pre_delete', $row_id );
do_action( 'wpforms_pre_delete_' . $this->type, $row_id );
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
if ( $wpdb->query( $wpdb->prepare( "DELETE FROM $this->table_name WHERE $this->primary_key = %d", $row_id ) ) === false ) {
return false;
}
do_action( 'wpforms_post_delete', $row_id );
do_action( 'wpforms_post_delete_' . $this->type, $row_id );
return true;
}
/**
* Delete a record from the database by column.
*
* @since 1.1.6
*
* @param string $column Column name.
* @param int|string $column_value Column value.
*
* @return bool False if the record could not be deleted, true otherwise.
*/
public function delete_by( $column, $column_value ) {
global $wpdb;
if (
empty( $column ) ||
empty( $column_value ) ||
! array_key_exists( $column, $this->get_columns() )
) {
return false;
}
do_action( 'wpforms_pre_delete', $column_value );
do_action( 'wpforms_pre_delete_' . $this->type, $column_value );
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.InterpolatedNotPrepared
if ( $wpdb->query( $wpdb->prepare( "DELETE FROM $this->table_name WHERE $column = %s", $column_value ) ) === false ) {
return false;
}
do_action( 'wpforms_post_delete', $column_value );
do_action( 'wpforms_post_delete_' . $this->type, $column_value );
return true;
}
/**
* Delete record(s) from the database using WHERE IN syntax.
*
* @since 1.6.4
*
* @param string $column Column name.
* @param mixed $column_values Column values.
*
* @return int|bool Number of deleted records, false otherwise.
*/
public function delete_where_in( $column, $column_values ) {
global $wpdb;
if ( empty( $column ) || empty( $column_values ) ) {
return false;
}
if ( ! array_key_exists( $column, $this->get_columns() ) ) {
return false;
}
$values = is_array( $column_values ) ? $column_values : [ $column_values ];
foreach ( $values as $key => $value ) {
// Check if a string contains an integer and sanitize accordingly.
if ( (string) (int) $value === $value ) {
$values[ $key ] = (int) $value;
$placeholders[ $key ] = '%d';
} else {
$values[ $key ] = sanitize_text_field( $value );
$placeholders[ $key ] = '%s';
}
}
$placeholders = isset( $placeholders ) ? implode( ',', $placeholders ) : '';
$sql = "DELETE FROM $this->table_name WHERE $column IN ( $placeholders )";
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching,WordPress.DB.PreparedSQL.NotPrepared
return $wpdb->query( $wpdb->prepare( $sql, $values ) );
}
/**
* Check if the given table exists.
*
* @since 1.1.6
* @since 1.5.9 Default value is now the current child class table name.
*
* @param string $table The table name. Defaults to the child class table name.
*
* @return bool If the table name exists.
*/
public function table_exists( $table = '' ) {
global $wpdb;
if ( ! empty( $table ) ) {
$table = sanitize_text_field( $table );
} else {
$table = $this->table_name;
}
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.NoCaching
return $wpdb->get_var( $wpdb->prepare( 'SHOW TABLES LIKE %s', $table ) ) === $table;
}
/**
* Build WHERE for a query.
*
* @since 1.7.2.2
*
* @param array $args Optional args.
* @param array $keys Allowed arg items.
* @param string|string[] $formats Formats of arg items.
*
* @return string
*/
protected function build_where( $args, $keys = [], $formats = [] ) {
$formats = array_pad( $formats, count( $keys ), '%d' );
$where = '';
foreach ( $keys as $index => $key ) {
// Value `$args[ $key ]` can be a natural number and a numeric string.
// We should skip empty string values, but continue working with '0'.
if ( empty( $args[ $key ] ) && $args[ $key ] !== '0' ) {
continue;
}
$ids = wpforms_wpdb_prepare_in( $args[ $key ], $formats[ $index ] );
$where .= empty( $where ) ? 'WHERE' : 'AND';
$where .= " `{$key}` IN ( {$ids} ) ";
}
return $where;
}
}