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Editing: Database.php

<?php
/**
 * Abstract class for database
 *
 * @package   PopupMaker
 * @copyright Copyright (c) 2024, Code Atlantic LLC
 *
 * phpcs:disable WordPress.DB.DirectDatabaseQuery.DirectQuery
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
/**
 * Abstract database class.
 *
 * @package PopupMaker
 */
abstract class PUM_Abstract_Database {

/**
	 * Instance of the class.
	 *
	 * @var static
	 */
	public static $instance;

/**
	 * The name of our database table.
	 *
	 * @var string
	 */
	public $table_name = '';

/**
	 * The version of our database table.
	 *
	 * @var integer
	 */
	public $version = 1;

/**
	 * The name of the primary column.
	 *
	 * @var string
	 */
	public $primary_key = 'ID';

/**
	 * The WordPress version.
	 *
	 * @var float
	 */
	public $wp_version = '';

/**
	 * Get things started
	 */
	public function __construct() {
		/**
		 * @var \wpdb $wpdb
		 */
		global $wpdb;

$this->wp_version = floatval( get_bloginfo( 'version' ) );

$current_db_version = $this->get_installed_version();

if ( ! $current_db_version || $current_db_version < $this->version ) {
			// Install the table.
			// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
			@$this->create_table();

// Leaving this flagged for caching to optimize in future.
			if ( $this->wp_version >= 6.2 ) {
				$table_found = $wpdb->get_var( $wpdb->prepare( 'SHOW TABLES LIKE %i', $this->table_name() ) );
			} else {
				// Ignored because these are identifiersas we still support <=6.2
				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
				$table_found = $wpdb->get_var( "SHOW TABLES LIKE '{$this->table_name()}'" );
			}

if ( $this->table_name() === $table_found ) {
				$this->update_db_version();
			}
		}

$wpdb->{$this->table_name} = $this->table_name();
	}

/**
	 * Gets db version from new or old source.
	 *
	 * @return float
	 */
	public function get_installed_version() {
		// Get list of all current db table versions.
		$db_versions = get_option( 'pum_db_versions', [] );

// #1 If it exists in new pum_db_vers[] option, move on.
		if ( isset( $db_versions[ $this->table_name ] ) ) {
			return (float) $db_versions[ $this->table_name ];
		}

// #2 Else look for old key, if exists, migrate and delete.
		$db_version_old_key = get_option( $this->table_name . '_db_version' );

if ( $db_version_old_key ) {
			if ( $db_version_old_key > 0 ) {
				$db_versions[ $this->table_name ] = (float) $db_version_old_key;
				update_option( 'pum_db_versions', $db_versions );
			}

delete_option( $this->table_name . '_db_version' );
		}

return (float) $db_version_old_key;
	}

public function update_db_version() {
		// Get list of all current db table versions.
		$db_versions = get_option( 'pum_db_versions', [] );

$db_versions[ $this->table_name ] = (float) $this->version;
		update_option( 'pum_db_versions', $db_versions );
	}

/**
	 * Create the table
	 */
	abstract public function create_table();

/**
	 * @return static
	 * @throws \Exception
	 */
	public static function instance() {
		$class = get_called_class();

if ( ! isset( self::$instance[ $class ] ) ) {
			self::$instance[ $class ] = new $class();
		}

return self::$instance[ $class ];
	}

/**
	 * Retrieve a row by the primary key
	 *
	 * @param $row_id
	 *
	 * @return  object
	 */
	public function get( $row_id ) {
		global $wpdb;

if ( $this->wp_version >= 6.2 ) {
			// Use %i format.
			$result = $wpdb->get_row(
				$wpdb->prepare(
					'SELECT * FROM %i WHERE %i = %d LIMIT 1;',
					$this->table_name(),
					$this->primary_key,
					$row_id
				)
			);
		} else {
			$result = $wpdb->get_row(
				$wpdb->prepare(
					// Ignored because these are identifiersas we still support <=6.2
					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
					"SELECT * FROM {$this->table_name()} WHERE $this->primary_key = %d LIMIT 1;",
					$row_id
				)
			);
		}

return $this->prepare_result( $result );
	}

/**
	 * @param object|array $result
	 *
	 * @return object|array
	 */
	public function prepare_result( $result ) {
		if ( ! $result || ( ! is_array( $result ) && ! is_object( $result ) ) ) {
			return $result;
		}

if ( is_object( $result ) ) {
			$vars = get_object_vars( $result );
			foreach ( $vars as $key => $value ) {
				if ( is_string( $value ) ) {
					$result->$key = maybe_unserialize( $value );
				}
			}
		} elseif ( is_array( $result ) ) {
			foreach ( $result as $key => $value ) {
				if ( is_string( $value ) ) {
					$result[ $key ] = maybe_unserialize( $value );
				}
			}
		}

return $result;
	}

/**
	 * @param array|object[] $results
	 *
	 * @return mixed
	 */
	public function prepare_results( $results ) {

foreach ( $results as $key => $result ) {
			$results[ $key ] = $this->prepare_result( $result );
		}

return $results;
	}

/**
	 * @return string
	 */
	public function table_name() {
		global $wpdb;

return $wpdb->prefix . $this->table_name;
	}

/**
	 * Retrieve a row by a specific column / value
	 *
	 * @param string $column
	 * @param int    $row_id
	 *
	 * @return  object
	 */
	public function get_by( $column, $row_id ) {
		global $wpdb;

if ( $this->wp_version >= 6.2 ) {
			// Use %i format.
			$result = $wpdb->get_row(
				$wpdb->prepare(
					'SELECT * FROM %i WHERE %i = %s LIMIT 1;',
					$this->table_name(),
					$column,
					$row_id
				)
			);
		} else {
			$result = $wpdb->get_row(
				$wpdb->prepare(
					// Ignored because these are identifiersas we still support <=6.2
					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
					"SELECT * FROM {$this->table_name()} WHERE $column = %d LIMIT 1;",
					$row_id
				)
			);
		}

return $this->prepare_result( $result );
	}

/**
	 * Retrieve a specific column's value by the primary key
	 *
	 * @param string $column
	 * @param int    $row_id
	 *
	 * @return  string
	 */
	public function get_column( $column, $row_id ) {
		global $wpdb;

if ( $this->wp_version >= 6.2 ) {
			// Use %i format.
			$result = $wpdb->get_var(
				$wpdb->prepare(
					'SELECT %i FROM %i WHERE %i = %d LIMIT 1;',
					$column,
					$this->table_name(),
					$this->primary_key,
					$row_id
				)
			);
		} else {
			$result = $wpdb->get_var(
				$wpdb->prepare(
					// Ignored because these are identifiers as we still support <=6.2
					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
					"SELECT $column FROM {$this->table_name()} WHERE $this->primary_key = %d LIMIT 1;",
					$row_id
				)
			);
		}

return $this->prepare_result( $result );
	}

/**
	 * Retrieve a specific column's value by the the specified column / value
	 *
	 * @param $column
	 * @param $column_where
	 * @param $column_value
	 *
	 * @return  string
	 */
	public function get_column_by( $column, $column_where, $column_value ) {
		global $wpdb;

if ( $this->wp_version >= 6.2 ) {
			// Use %i format.
			$result = $wpdb->get_var(
				$wpdb->prepare(
					'SELECT %i FROM %i WHERE %i = %s LIMIT 1;',
					$column,
					$this->table_name(),
					$column_where,
					$column_value
				)
			);
		} else {
			$result = $wpdb->get_var(
				$wpdb->prepare(
					// Ignored because these are identifiers as we still support <=6.2
					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
					"SELECT $column FROM {$this->table_name()} WHERE $column_where = %s LIMIT 1;",
					$column_value
				)
			);
		}

return $this->prepare_result( $result );
	}

/**
	 * Insert a new row
	 *
	 * @param array $data
	 *
	 * @return  int
	 */
	public function insert( $data ) {
		global $wpdb;

// Set default values
		$data = wp_parse_args( $data, $this->get_column_defaults() );

do_action( 'pum_pre_insert_' . $this->table_name, $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 );

foreach ( $data as $key => $value ) {
			if ( is_array( $value ) ) {
				$data[ $key ] = maybe_serialize( $value );
			}
		}

$wpdb->insert( $this->table_name(), $data, $column_formats );

do_action( 'pum_post_insert_' . $this->table_name, $wpdb->insert_id, $data );

return $wpdb->insert_id;
	}

/**
	 * Default column values
	 *
	 * @return  array
	 */
	public function get_column_defaults() {
		return [];
	}

/**
	 * Whitelist of columns
	 *
	 * @return  array
	 */
	public function get_columns() {
		return [];
	}

/**
	 * Update a row
	 *
	 * @param        $row_id
	 * @param array  $data
	 * @param string $where
	 *
	 * @return  bool
	 */
	public function update( $row_id, $data = [], $where = '' ) {

global $wpdb;

// Row ID must be positive integer
		$row_id = absint( $row_id );

if ( empty( $row_id ) ) {
			return false;
		}

if ( empty( $where ) ) {
			$where = $this->primary_key;
		}

// 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 );

foreach ( $data as $key => $value ) {
			if ( is_array( $value ) ) {
				$data[ $key ] = maybe_serialize( $value );
			}
		}

// 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 );

if ( false === $wpdb->update( $this->table_name(), $data, [ $where => $row_id ], $column_formats ) ) {
			return false;
		}

return true;
	}

/**
	 * Delete a row identified by the primary key
	 *
	 * @param int $row_id
	 *
	 * @return  bool
	 */
	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;
		}

if ( $this->wp_version >= 6.2 ) {
			// Use %i format.
			$result = $wpdb->query(
				$wpdb->prepare(
					'DELETE FROM %i WHERE %i = %d',
					$this->table_name(),
					$this->primary_key,
					$row_id
				)
			);
		} else {
			$result = $wpdb->query(
				$wpdb->prepare(
					// Ignored because these are identifiersas we still support <=6.2
					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
					"DELETE FROM {$this->table_name()} WHERE $this->primary_key = %d",
					$row_id
				)
			);
		}

if ( false === $result ) {
			return false;
		}

return true;
	}

/**
	 * Delete a row identified by the primary key
	 *
	 * @param $column
	 * @param $row_id
	 *
	 * @return  bool
	 */
	public function delete_by( $column, $row_id ) {
		global $wpdb;
		if ( empty( $row_id ) ) {
			return false;
		}

if ( $this->wp_version >= 6.2 ) {
			// Use %i format.
			$result = $wpdb->query(
				$wpdb->prepare(
					'DELETE FROM %i WHERE %i = %s',
					$this->table_name(),
					$column,
					$row_id
				)
			);
		} else {
			$result = $wpdb->query(
				$wpdb->prepare(
					// Ignored because these are identifiersas we still support <=6.2
					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
					"DELETE FROM {$this->table_name()} WHERE $column = %s",
					$row_id
				)
			);
		}

if ( false === $result ) {
			return false;
		}

return true;
	}

/**
	 * Prepare query.
	 *
	 * @param       $query
	 * @param array $args
	 *
	 * @return string
	 */
	public function prepare_query( $query, $args = [] ) {

if ( $args['orderby'] ) {
			$query .= " ORDER BY {$args['orderby']} {$args['order']}";
		}

$query .= " LIMIT {$args['limit']}";

if ( $args['offset'] ) {
			$query .= " OFFSET {$args['offset']}";
		}

$query .= ';';

return $query;
	}

/**
	 * @param array  $args
	 * @param string $return_type
	 *
	 * @return array|mixed|object[]
	 */
	public function query( $args = [], $return_type = OBJECT ) {
		global $wpdb;

$args = wp_parse_args(
			$args,
			[
				'fields'  => '*',
				'page'    => null,
				'limit'   => null,
				'offset'  => null,
				's'       => null,
				'orderby' => null,
				'order'   => null,
			]
		);

$columns = $this->get_columns();

$fields = $args['fields'];

if ( '*' === $fields ) {
			$fields = array_keys( $columns );
		} else {
			$fields = explode( ',', $args['fields'] );
			$fields = array_map( 'trim', $fields );
			$fields = array_map( 'sanitize_text_field', $fields );
		}

$select_fields = implode( '`, `', $fields );

// Begin building query.
		$query = "SELECT `$select_fields` FROM {$this->table_name()}";

// Set up $values array for wpdb::prepare
		$values = [];

// Define an empty WHERE clause to start from.
		$where = 'WHERE 1=1';

// Build search query.
		if ( $args['s'] && ! empty( $args['s'] ) ) {
			$search = wp_unslash( trim( $args['s'] ) );

$search_where = [];

foreach ( $columns as $key => $type ) {
				if ( in_array( $key, $fields, true ) ) {
					if ( '%s' === $type || ( '%d' === $type && is_numeric( $search ) ) ) {
						$values[]       = '%' . $wpdb->esc_like( $search ) . '%';
						$search_where[] = "`$key` LIKE '%s'";
					}
				}
			}

if ( ! empty( $search_where ) ) {
				$where .= ' AND (' . join( ' OR ', $search_where ) . ')';
			}
		}

$query .= " $where";

if ( ! empty( $args['orderby'] ) ) {
			$query   .= ' ORDER BY %s';
			$values[] = wp_unslash( trim( $args['orderby'] ) );

switch ( $args['order'] ) {
				case 'asc':
				case 'ASC':
					$query .= ' ASC';
					break;
				case 'desc':
				case 'DESC':
				default:
					$query .= ' DESC';
					break;
			}
		}

if ( ! empty( $args['limit'] ) ) {
			$query   .= ' LIMIT %d';
			$values[] = absint( $args['limit'] );
		}

// Pagination.
		if ( $args['page'] >= 1 ) {
			$args['offset'] = ( $args['page'] * $args['limit'] ) - $args['limit'];
		}

if ( ! empty( $args['offset'] ) ) {
			$query   .= ' OFFSET %d';
			$values[] = absint( $args['offset'] );
		}

if ( strpos( $query, '%s' ) || strpos( $query, '%d' ) ) {
			// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
			$query = $wpdb->prepare( $query, $values );
		}

// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
		return $this->prepare_results( $wpdb->get_results( $query, $return_type ) );
	}

/**
	 * Queries for total rows
	 *
	 * @param $args
	 *
	 * @return int
	 */
	public function total_rows( $args ) {
		// TODO REVIEW this can probably be done more efficiently. Look at how we do it for DB models.
		$args['limit']  = null;
		$args['offset'] = null;
		$args['page']   = null;

$results = $this->query( $args );

return $results ? count( $results ) : 0;
	}
}

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