<?php
/**
* Class for generating SQL clauses that filter a primary query according to date.
*
* WP_Date_Query is a helper that allows primary query classes, such as WP_Query, to filter
* their results by date columns, by generating `WHERE` subclauses to be attached to the
* primary SQL query string.
*
* Attempting to filter by an invalid date value (eg month=13) will generate SQL that will
* return no results. In these cases, a _doing_it_wrong() error notice is also thrown.
* See WP_Date_Query::validate_date_values().
*
* @link https://developer.wordpress.org/reference/classes/wp_query/
*
* @since 3.7.0
*/
#[AllowDynamicProperties]
class WP_Date_Query {
/**
* Array of date queries.
*
* See WP_Date_Query::__construct() for information on date query arguments.
*
* @since 3.7.0
* @var array
*/
public $queries = array();

/**
* The default relation between top-level queries. Can be either 'AND' or 'OR'.
*
* @since 3.7.0
* @var string
*/
public $relation = 'AND';

/**
* The column to query against. Can be changed via the query arguments.
*
* @since 3.7.0
* @var string
*/
public $column = 'post_date';

/**
* The value comparison operator. Can be changed via the query arguments.
*
* @since 3.7.0
* @var string
*/
public $compare = '=';

/**
* Supported time-related parameter keys.
*
* @since 4.1.0
* @var string[]
*/
public $time_keys = array( 'after', 'before', 'year', 'month', 'monthnum', 'week', 'w', 'dayofyear', 'day', 'dayofweek', 'dayofweek_iso', 'hour', 'minute', 'second' );

/**
* Constructor.
*
* Time-related parameters that normally require integer values ('year', 'month', 'week', 'dayofyear', 'day',
* 'dayofweek', 'dayofweek_iso', 'hour', 'minute', 'second') accept arrays of integers for some values of
* 'compare'. When 'compare' is 'IN' or 'NOT IN', arrays are accepted; when 'compare' is 'BETWEEN' or 'NOT
* BETWEEN', arrays of two valid values are required. See individual argument descriptions for accepted values.
*
* @since 3.7.0
* @since 4.0.0 The $inclusive logic was updated to include all times within the date range.
* @since 4.1.0 Introduced 'dayofweek_iso' time type parameter.
*
* @param array $date_query {
* Array of date query clauses.
*
* @type array ...$0 {
* @type string $column Optional. The column to query against. If undefined, inherits the value of
* the `$default_column` parameter. See WP_Date_Query::validate_column() and
* the {@see 'date_query_valid_columns'} filter for the list of accepted values.
* Default 'post_date'.
* @type string $compare Optional. The comparison operator. Accepts '=', '!=', '>', '>=', '<', '<=',
* 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN'. Default '='.
* @type string $relation Optional. The boolean relationship between the date queries. Accepts 'OR' or 'AND'.
* Default 'OR'.
* @type array ...$0 {
* Optional. An array of first-order clause parameters, or another fully-formed date query.
*
* @type string|array $before {
* Optional. Date to retrieve posts before. Accepts `strtotime()`-compatible string,
* or array of 'year', 'month', 'day' values.
*
* @type string $year The four-digit year. Default empty. Accepts any four-digit year.
* @type string $month Optional when passing array.The month of the year.
* Default (string:empty)|(array:1). Accepts numbers 1-12.
* @type string $day Optional when passing array.The day of the month.
* Default (string:empty)|(array:1). Accepts numbers 1-31.
* }
* @type string|array $after {
* Optional. Date to retrieve posts after. Accepts `strtotime()`-compatible string,
* or array of 'year', 'month', 'day' values.
*
* @type string $year The four-digit year. Accepts any four-digit year. Default empty.
* @type string $month Optional when passing array. The month of the year. Accepts numbers 1-12.
* Default (string:empty)|(array:12).
* @type string $day Optional when passing array.The day of the month. Accepts numbers 1-31.
* Default (string:empty)|(array:last day of month).
* }
* @type string $column Optional. Used to add a clause comparing a column other than
* the column specified in the top-level `$column` parameter.
* See WP_Date_Query::validate_column() and
* the {@see 'date_query_valid_columns'} filter for the list
* of accepted values. Default is the value of top-level `$column`.
* @type string $compare Optional. The comparison operator. Accepts '=', '!=', '>', '>=',
* '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN'. 'IN',
* 'NOT IN', 'BETWEEN', and 'NOT BETWEEN'. Comparisons support
* arrays in some time-related parameters. Default '='.
* @type bool $inclusive Optional. Include results from dates specified in 'before' or
* 'after'. Default false.
* @type int|int[] $year Optional. The four-digit year number. Accepts any four-digit year
* or an array of years if `$compare` supports it. Default empty.
* @type int|int[] $month Optional. The two-digit month number. Accepts numbers 1-12 or an
* array of valid numbers if `$compare` supports it. Default empty.
* @type int|int[] $week Optional. The week number of the year. Accepts numbers 0-53 or an
* array of valid numbers if `$compare` supports it. Default empty.
* @type int|int[] $dayofyear Optional. The day number of the year. Accepts numbers 1-366 or an
* array of valid numbers if `$compare` supports it.
* @type int|int[] $day Optional. The day of the month. Accepts numbers 1-31 or an array
* of valid numbers if `$compare` supports it. Default empty.
* @type int|int[] $dayofweek Optional. The day number of the week. Accepts numbers 1-7 (1 is
* Sunday) or an array of valid numbers if `$compare` supports it.
* Default empty.
* @type int|int[] $dayofweek_iso Optional. The day number of the week (ISO). Accepts numbers 1-7
* (1 is Monday) or an array of valid numbers if `$compare` supports it.
* Default empty.
* @type int|int[] $hour Optional. The hour of the day. Accepts numbers 0-23 or an array
* of valid numbers if `$compare` supports it. Default empty.
* @type int|int[] $minute Optional. The minute of the hour. Accepts numbers 0-59 or an array
* of valid numbers if `$compare` supports it. Default empty.
* @type int|int[] $second Optional. The second of the minute. Accepts numbers 0-59 or an
* array of valid numbers if `$compare` supports it. Default empty.
* }
* }
* }
* @param string $default_column Optional. Default column to query against. See WP_Date_Query::validate_column()
* and the {@see 'date_query_valid_columns'} filter for the list of accepted values.
* Default 'post_date'.
*/
public function __construct( $date_query, $default_column = 'post_date' ) {
if ( empty( $date_query ) || ! is_array( $date_query ) ) {
return;
}

if ( isset( $date_query['relation'] ) ) {
$this->relation = $this->sanitize_relation( $date_query['relation'] );
} else {
$this->relation = 'AND';
}

// Support for passing time-based keys in the top level of the $date_query array.
if ( ! isset( $date_query[0] ) ) {
$date_query = array( $date_query );
}

if ( ! empty( $date_query['column'] ) ) {
$date_query['column'] = esc_sql( $date_query['column'] );
} else {
$date_query['column'] = esc_sql( $default_column );
}

$this->column = $this->validate_column( $this->column );

$this->compare = $this->get_compare( $date_query );

$this->queries = $this->sanitize_query( $date_query );
}

/**
* Recursive-friendly query sanitizer.
*
* Ensures that each query-level clause has a 'relation' key, and that
* each first-order clause contains all the necessary keys from `$defaults`.
*
* @since 4.1.0
*
* @param array $queries
* @param array $parent_query
* @return array Sanitized queries.
*/
public function sanitize_query( $queries, $parent_query = null ) {
$cleaned_query = array();

$defaults = array(
'column' => 'post_date',
'compare' => '=',
'relation' => 'AND',
);

// Numeric keys should always have array values.
foreach ( $queries as $qkey => $qvalue ) {
if ( is_numeric( $qkey ) && ! is_array( $qvalue ) ) {
unset( $queries[ $qkey ] );
}
}

// Each query should have a value for each default key. Inherit from the parent when possible.
foreach ( $defaults as $dkey => $dvalue ) {
if ( isset( $queries[ $dkey ] ) ) {
continue;
}

if ( isset( $parent_query[ $dkey ] ) ) {
$queries[ $dkey ] = $parent_query[ $dkey ];
} else {
$queries[ $dkey ] = $dvalue;
}
}

// Validate the dates passed in the query.
if ( $this->is_first_order_clause( $queries ) ) {
$this->validate_date_values( $queries );
}

// Sanitize the relation parameter.
$queries['relation'] = $this->sanitize_relation( $queries['relation'] );

foreach ( $queries as $key => $q ) {
if ( ! is_array( $q ) || in_array( $key, $this->time_keys, true ) ) {
// This is a first-order query. Trust the values and sanitize when building SQL.
$cleaned_query[ $key ] = $q;
} else {
// Any array without a time key is another query, so we recurse.
$cleaned_query[] = $this->sanitize_query( $q, $queries );
}
}

return $cleaned_query;
}

/**
* Determines whether this is a first-order clause.
*
* Checks to see if the current clause has any time-related keys.
* If so, it's first-order.
*
* @since 4.1.0
*
* @param array $query Query clause.
* @return bool True if this is a first-order clause.
*/
protected function is_first_order_clause( $query ) {
$time_keys = array_intersect( $this->time_keys, array_keys( $query ) );
return ! empty( $time_keys );
}

/**
* Determines and validates what comparison operator to use.
*
* @since 3.7.0
*
* @param array $query A date query or a date subquery.
* @return string The comparison operator.
*/
public function get_compare( $query ) {
if ( ! empty( $query['compare'] )
&& in_array( $query['compare'], array( '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true )
) {
return strtoupper( $query['compare'] );
}

return $this->compare;
}

/**
* Validates the given date_query values and triggers errors if something is not valid.
*
* Note that date queries with invalid date ranges are allowed to
* continue (though of course no items will be found for impossible dates).
* This method only generates debug notices for these cases.
*
* @since 4.1.0
*
* @param array $date_query The date_query array.
* @return bool True if all values in the query are valid, false if one or more fail.
*/
public function validate_date_values( $date_query = array() ) {
if ( empty( $date_query ) ) {
return false;
}

$valid = true;

/*
* Validate 'before' and 'after' up front, then let the
* validation routine continue to be sure that all invalid
* values generate errors too.
*/
if ( array_key_exists( 'before', $date_query ) && is_array( $date_query['before'] ) ) {
$valid = $this->validate_date_values( $date_query['before'] );
}

if ( array_key_exists( 'after', $date_query ) && is_array( $date_query['after'] ) ) {
$valid = $this->validate_date_values( $date_query['after'] );
}

// Array containing all min-max checks.
$min_max_checks = array();

// Days per year.
if ( array_key_exists( 'year', $date_query ) ) {
/*
* If a year exists in the date query, we can use it to get the days.
* If multiple years are provided (as in a BETWEEN), use the first one.
*/
if ( is_array( $date_query['year'] ) ) {
$_year = reset( $date_query['year'] );
} else {
$_year = $date_query['year'];
}

$max_days_of_year = (int) gmdate( 'z', mktime( 0, 0, 0, 12, 31, $_year ) ) + 1;
} else {
// Otherwise we use the max of 366 (leap-year).
$max_days_of_year = 366;
}

$min_max_checks['dayofyear'] = array(
'min' => 1,
'max' => $max_days_of_year,
);

// Days per week.
$min_max_checks['dayofweek'] = array(
'min' => 1,
'max' => 7,
);

// Days per week.
$min_max_checks['dayofweek_iso'] = array(
'min' => 1,
'max' => 7,
);

// Months per year.
$min_max_checks['month'] = array(
'min' => 1,
'max' => 12,
);

// Weeks per year.
if ( isset( $_year ) ) {
/*
* If we have a specific year, use it to calculate number of weeks.
* Note: the number of weeks in a year is the date in which Dec 28 appears.
*/
$week_count = gmdate( 'W', mktime( 0, 0, 0, 12, 28, $_year ) );

} else {
// Otherwise set the week-count to a maximum of 53.
$week_count = 53;
}

$min_max_checks['week'] = array(
'min' => 1,
'max' => $week_count,
);

// Days per month.
$min_max_checks['day'] = array(
'min' => 1,
'max' => 31,
);

// Hours per day.
$min_max_checks['hour'] = array(
'min' => 0,
'max' => 23,
);

// Minutes per hour.
$min_max_checks['minute'] = array(
'min' => 0,
'max' => 59,
);

// Seconds per minute.
$min_max_checks['second'] = array(
'min' => 0,
'max' => 59,
);

// Concatenate and throw a notice for each invalid value.
foreach ( $min_max_checks as $key => $check ) {
if ( ! array_key_exists( $key, $date_query ) ) {
continue;
}

// Throw a notice for each failing value.
foreach ( (array) $date_query[ $key ] as $_value ) {
$is_between = $_value >= $check['min'] && $_value <= $check['max'];

if ( ! is_numeric( $_value ) || ! $is_between ) {
$error = sprintf(
/* translators: Date query invalid date message. 1: Invalid value, 2: Type of value, 3: Minimum valid value, 4: Maximum valid value. */
__( 'Invalid value %1$s for %2$s. Expected value should be between %3$s and %4$s.' ),
'<code>' . esc_html( $_value ) . '</code>',
'<code>' . esc_html( $key ) . '</code>',
'<code>' . esc_html( $check['min'] ) . '</code>',
'<code>' . esc_html( $check['max'] ) . '</code>'
);

_doing_it_wrong( __CLASS__, $error, '4.1.0' );

$valid = false;
}
}
}

// If we already have invalid date messages, don't bother running through checkdate().
if ( ! $valid ) {
return $valid;
}

$day_month_year_error_msg = '';

$day_exists = array_key_exists( 'day', $date_query ) && is_numeric( $date_query['day'] );
$month_exists = array_key_exists( 'month', $date_query ) && is_numeric( $date_query['month'] );
$year_exists = array_key_exists( 'year', $date_query ) && is_numeric( $date_query['year'] );

if ( $day_exists && $month_exists && $year_exists ) {
// 1. Checking day, month, year combination.
if ( ! wp_checkdate( $date_query['month'], $date_query['day'], $date_query['year'], sprintf( '%s-%s-%s', $date_query['year'], $date_query['month'], $date_query['day'] ) ) ) {
$day_month_year_error_msg = sprintf(
/* translators: 1: Year, 2: Month, 3: Day of month. */
__( 'The following values do not describe a valid date: year %1$s, month %2$s, day %3$s.' ),
'<code>' . esc_html( $date_query['year'] ) . '</code>',
'<code>' . esc_html( $date_query['month'] ) . '</code>',
'<code>' . esc_html( $date_query['day'] ) . '</code>'
);

$valid = false;
}
} elseif ( $day_exists && $month_exists ) {
/*
* 2. checking day, month combination
* We use 2012 because, as a leap year, it's the most permissive.
*/
if ( ! wp_checkdate( $date_query['month'], $date_query['day'], 2012, sprintf( '2012-%s-%s', $date_query['month'], $date_query['day'] ) ) ) {
$day_month_year_error_msg = sprintf(
/* translators: 1: Month, 2: Day of month. */
__( 'The following values do not describe a valid date: month %1$s, day %2$s.' ),
'<code>' . esc_html( $date_query['month'] ) . '</code>',
'<code>' . esc_html( $date_query['day'] ) . '</code>'
);

$valid = false;
}
}

if ( ! empty( $day_month_year_error_msg ) ) {
_doing_it_wrong( __CLASS__, $day_month_year_error_msg, '4.1.0' );
}

return $valid;
}

/**
* Validates a column name parameter.
*
* Column names without a table prefix (like 'post_date') are checked against a list of
* allowed and known tables, and then, if found, have a table prefix (such as 'wp_posts.')
* prepended. Prefixed column names (such as 'wp_posts.post_date') bypass this allowed
* check, and are only sanitized to remove illegal characters.
*
* @since 3.7.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $column The user-supplied column name.
* @return string A validated column name value.
*/
public function validate_column( $column ) {
global $wpdb;

$valid_columns = array(
'post_date',
'post_date_gmt',
'post_modified',
'post_modified_gmt',
'comment_date',
'comment_date_gmt',
'user_registered',
'registered',
'last_updated',
);

// Attempt to detect a table prefix.
if ( ! str_contains( $column, '.' ) ) {
/**
* Filters the list of valid date query columns.
*
* @since 3.7.0
* @since 4.1.0 Added 'user_registered' to the default recognized columns.
* @since 4.6.0 Added 'registered' and 'last_updated' to the default recognized columns.
*
* @param string[] $valid_columns An array of valid date query columns. Defaults
* are 'post_date', 'post_date_gmt', 'post_modified',
* 'post_modified_gmt', 'comment_date', 'comment_date_gmt',
* 'user_registered', 'registered', 'last_updated'.
*/
if ( ! in_array( $column, apply_filters( 'date_query_valid_columns', $valid_columns ), true ) ) {
$column = 'post_date';
}

$known_columns = array(
$wpdb->posts => array(
'post_date',
'post_date_gmt',
'post_modified',
'post_modified_gmt',
),
$wpdb->comments => array(
'comment_date',
'comment_date_gmt',
),
$wpdb->users => array(
'user_registered',
),
$wpdb->blogs => array(
'registered',
'last_updated',
),
);

// If it's a known column name, add the appropriate table prefix.
foreach ( $known_columns as $table_name => $table_columns ) {
if ( in_array( $column, $table_columns, true ) ) {
$column = $table_name . '.' . $column;
break;
}
}
}

// Remove unsafe characters.
return preg_replace( '/[^a-zA-Z0-9_$\.]/', '', $column );
}

/**
* Generates WHERE clause to be appended to a main query.
*
* @since 3.7.0
*
* @return string MySQL WHERE clause.
*/
public function get_sql() {
$sql = $this->get_sql_clauses();

$where = $sql['where'];

/**
* Filters the date query WHERE clause.
*
* @since 3.7.0
*
* @param string $where WHERE clause of the date query.
* @param WP_Date_Query $query The WP_Date_Query instance.
*/
return apply_filters( 'get_date_sql', $where, $this );
}

/**
* Generates SQL clauses to be appended to a main query.
*
* Called by the public WP_Date_Query::get_sql(), this method is abstracted
* out to maintain parity with the other Query classes.
*
* @since 4.1.0
*
* @return string[] {
* Array containing JOIN and WHERE SQL clauses to append to the main query.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_clauses() {
$sql = $this->get_sql_for_query( $this->queries );

if ( ! empty( $sql['where'] ) ) {
$sql['where'] = ' AND ' . $sql['where'];
}

return $sql;
}

/**
* Generates SQL clauses for a single query array.
*
* If nested subqueries are found, this method recurses the tree to
* produce the properly nested SQL.
*
* @since 4.1.0
*
* @param array $query Query to parse.
* @param int $depth Optional. Number of tree levels deep we currently are.
* Used to calculate indentation. Default 0.
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to a single query array.
*
* @type string $join SQL fragment to append to the main JOIN clause.
* @type string $where SQL fragment to append to the main WHERE clause.
* }
*/
protected function get_sql_for_query( $query, $depth = 0 ) {
$sql_chunks = array(
'join' => array(),
'where' => array(),
);

$sql = array(
'join' => '',
'where' => '',
);

$indent = '';
for ( $i = 0; $i < $depth; $i++ ) {
$indent .= ' ';
}

foreach ( $query as $key => $clause ) {
if ( 'relation' === $key ) {
$relation = $query['relation'];
} elseif ( is_array( $clause ) ) {

// This is a first-order clause.
if ( $this->is_first_order_clause( $clause ) ) {
$clause_sql = $this->get_sql_for_clause( $clause, $query );

$where_count = count( $clause_sql['where'] );
if ( ! $where_count ) {
$sql_chunks['where'][] = '';
} elseif ( 1 === $where_count ) {
$sql_chunks['where'][] = $clause_sql['where'][0];
} else {
$sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )';
}

$sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] );
// This is a subquery, so we recurse.
} else {
$clause_sql = $this->get_sql_for_query( $clause, $depth + 1 );

$sql_chunks['where'][] = $clause_sql['where'];
$sql_chunks['join'][] = $clause_sql['join'];
}
}
}

// Filter to remove empties.
$sql_chunks['join'] = array_filter( $sql_chunks['join'] );
$sql_chunks['where'] = array_filter( $sql_chunks['where'] );

if ( empty( $relation ) ) {
$relation = 'AND';
}

// Filter duplicate JOIN clauses and combine into a single string.
if ( ! empty( $sql_chunks['join'] ) ) {
$sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) );
}

// Generate a single WHERE clause with proper brackets and indentation.
if ( ! empty( $sql_chunks['where'] ) ) {
$sql['where'] = '( ' . "\n " . $indent . implode( ' ' . "\n " . $indent . $relation . ' ' . "\n " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')';
}

return $sql;
}

/**
* Turns a single date clause into pieces for a WHERE clause.
*
* A wrapper for get_sql_for_clause(), included here for backward
* compatibility while retaining the naming convention across Query classes.
*
* @since 3.7.0
*
* @param array $query Date query arguments.
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to the main query.
*
* @type string[] $join Array of SQL fragments to append to the main JOIN clause.
* @type string[] $where Array of SQL fragments to append to the main WHERE clause.
* }
*/
protected function get_sql_for_subquery( $query ) {
return $this->get_sql_for_clause( $query, '' );
}

/**
* Turns a first-order date query into SQL for a WHERE clause.
*
* @since 4.1.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param array $query Date query clause.
* @param array $parent_query Parent query of the current date query.
* @return array {
* Array containing JOIN and WHERE SQL clauses to append to the main query.
*
* @type string[] $join Array of SQL fragments to append to the main JOIN clause.
* @type string[] $where Array of SQL fragments to append to the main WHERE clause.
* }
*/
protected function get_sql_for_clause( $query, $parent_query ) {
global $wpdb;

// The sub-parts of a $where part.
$where_parts = array();

$column = ( ! empty( $query['column'] ) ) ? esc_sql( $query['column'] ) : $this->column;

$column = $this->validate_column( $column );

$compare = $this->get_compare( $query );

$inclusive = ! empty( $query['inclusive'] );

// Assign greater- and less-than values.
$lt = '<';
$gt = '>';

if ( $inclusive ) {
$lt .= '=';
$gt .= '=';
}

// Range queries.
if ( ! empty( $query['after'] ) ) {
$where_parts[] = $wpdb->prepare( "$column $gt %s", $this->build_mysql_datetime( $query['after'], ! $inclusive ) );
}
if ( ! empty( $query['before'] ) ) {
$where_parts[] = $wpdb->prepare( "$column $lt %s", $this->build_mysql_datetime( $query['before'], $inclusive ) );
}
// Specific value queries.

$date_units = array(
'YEAR' => array( 'year' ),
'MONTH' => array( 'month', 'monthnum' ),
'_wp_mysql_week' => array( 'week', 'w' ),
'DAYOFYEAR' => array( 'dayofyear' ),
'DAYOFMONTH' => array( 'day' ),
'DAYOFWEEK' => array( 'dayofweek' ),
'WEEKDAY' => array( 'dayofweek_iso' ),
);

// Check of the possible date units and add them to the query.
foreach ( $date_units as $sql_part => $query_parts ) {
foreach ( $query_parts as $query_part ) {
if ( isset( $query[ $query_part ] ) ) {
$value = $this->build_value( $compare, $query[ $query_part ] );
if ( $value ) {
switch ( $sql_part ) {
case '_wp_mysql_week':
$where_parts[] = _wp_mysql_week( $column ) . " $compare $value";
break;
case 'WEEKDAY':
$where_parts[] = "$sql_part( $column ) + 1 $compare $value";
break;
default:
$where_parts[] = "$sql_part( $column ) $compare $value";
}

break;
}
}
}
}

if ( isset( $query['hour'] ) || isset( $query['minute'] ) || isset( $query['second'] ) ) {
// Avoid notices.
foreach ( array( 'hour', 'minute', 'second' ) as $unit ) {
if ( ! isset( $query[ $unit ] ) ) {
$query[ $unit ] = null;
}
}

$time_query = $this->build_time_query( $column, $compare, $query['hour'], $query['minute'], $query['second'] );
if ( $time_query ) {
$where_parts[] = $time_query;
}
}

/*
* Return an array of 'join' and 'where' for compatibility
* with other query classes.
*/
return array(
'where' => $where_parts,
'join' => array(),
);
}

/**
* Builds and validates a value string based on the comparison operator.
*
* @since 3.7.0
*
* @param string $compare The compare operator to use.
* @param string|array $value The value.
* @return string|false|int The value to be used in SQL or false on error.
*/
public function build_value( $compare, $value ) {
if ( ! isset( $value ) ) {
return false;
}

switch ( $compare ) {
case 'IN':
case 'NOT IN':
$value = (array) $value;

// Remove non-numeric values.
$value = array_filter( $value, 'is_numeric' );

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

return '(' . implode( ',', array_map( 'intval', $value ) ) . ')';

case 'BETWEEN':
case 'NOT BETWEEN':
if ( ! is_array( $value ) || 2 !== count( $value ) ) {
$value = array( $value, $value );
} else {
$value = array_values( $value );
}

// If either value is non-numeric, bail.
foreach ( $value as $v ) {
if ( ! is_numeric( $v ) ) {
return false;
}
}

$value = array_map( 'intval', $value );

return $value[0] . ' AND ' . $value[1];

default:
if ( ! is_numeric( $value ) ) {
return false;
}

return (int) $value;
}
}

/**
* Builds a MySQL format date/time based on some query parameters.
*
* You can pass an array of values (year, month, etc.) with missing parameter values being defaulted to
* either the maximum or minimum values (controlled by the $default_to parameter). Alternatively you can
* pass a string that will be passed to date_create().
*
* @since 3.7.0
*
* @param string|array $datetime An array of parameters or a strtotime() string.
* @param bool $default_to_max Whether to round up incomplete dates. Supported by values
* of $datetime that are arrays, or string values that are a
* subset of MySQL date format ('Y', 'Y-m', 'Y-m-d', 'Y-m-d H:i').
* Default: false.
* @return string|false A MySQL format date/time or false on failure.
*/
public function build_mysql_datetime( $datetime, $default_to_max = false ) {
if ( ! is_array( $datetime ) ) {

/*
* Try to parse some common date formats, so we can detect
* the level of precision and support the 'inclusive' parameter.
*/
if ( preg_match( '/^(\d{4})$/', $datetime, $matches ) ) {
// Y
$datetime = array(
'year' => (int) $matches[1],
);

} elseif ( preg_match( '/^(\d{4})\-(\d{2})$/', $datetime, $matches ) ) {
// Y-m
$datetime = array(
'year' => (int) $matches[1],
'month' => (int) $matches[2],
);

} elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2})$/', $datetime, $matches ) ) {
// Y-m-d
$datetime = array(
'year' => (int) $matches[1],
'month' => (int) $matches[2],
'day' => (int) $matches[3],
);

} elseif ( preg_match( '/^(\d{4})\-(\d{2})\-(\d{2}) (\d{2}):(\d{2})$/', $datetime, $matches ) ) {
// Y-m-d H:i
$datetime = array(
'year' => (int) $matches[1],
'month' => (int) $matches[2],
'day' => (int) $matches[3],
'hour' => (int) $matches[4],
'minute' => (int) $matches[5],
);
}

// If no match is found, we don't support default_to_max.
if ( ! is_array( $datetime ) ) {
$wp_timezone = wp_timezone();

// Assume local timezone if not provided.
$dt = date_create( $datetime, $wp_timezone );

if ( false === $dt ) {
return gmdate( 'Y-m-d H:i:s', false );
}

return $dt->setTimezone( $wp_timezone )->format( 'Y-m-d H:i:s' );
}
}

$datetime = array_map( 'absint', $datetime );

if ( ! isset( $datetime['year'] ) ) {
$datetime['year'] = current_time( 'Y' );
}

if ( ! isset( $datetime['month'] ) ) {
$datetime['month'] = ( $default_to_max ) ? 12 : 1;
}

if ( ! isset( $datetime['day'] ) ) {
$datetime['day'] = ( $default_to_max ) ? (int) gmdate( 't', mktime( 0, 0, 0, $datetime['month'], 1, $datetime['year'] ) ) : 1;
}

if ( ! isset( $datetime['hour'] ) ) {
$datetime['hour'] = ( $default_to_max ) ? 23 : 0;
}

if ( ! isset( $datetime['minute'] ) ) {
$datetime['minute'] = ( $default_to_max ) ? 59 : 0;
}

if ( ! isset( $datetime['second'] ) ) {
$datetime['second'] = ( $default_to_max ) ? 59 : 0;
}

return sprintf( '%04d-%02d-%02d %02d:%02d:%02d', $datetime['year'], $datetime['month'], $datetime['day'], $datetime['hour'], $datetime['minute'], $datetime['second'] );
}

/**
* Builds a query string for comparing time values (hour, minute, second).
*
* If just hour, minute, or second is set than a normal comparison will be done.
* However if multiple values are passed, a pseudo-decimal time will be created
* in order to be able to accurately compare against.
*
* @since 3.7.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $column The column to query against. Needs to be pre-validated!
* @param string $compare The comparison operator. Needs to be pre-validated!
* @param int|null $hour Optional. An hour value (0-23).
* @param int|null $minute Optional. A minute value (0-59).
* @param int|null $second Optional. A second value (0-59).
* @return string|false A query part or false on failure.
*/
public function build_time_query( $column, $compare, $hour = null, $minute = null, $second = null ) {
global $wpdb;

// Have to have at least one.
if ( ! isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) {
return false;
}

// Complex combined queries aren't supported for multi-value queries.
if ( in_array( $compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true ) ) {
$return = array();

$value = $this->build_value( $compare, $hour );
if ( false !== $value ) {
$return[] = "HOUR( $column ) $compare $value";
}

$value = $this->build_value( $compare, $minute );
if ( false !== $value ) {
$return[] = "MINUTE( $column ) $compare $value";
}

$value = $this->build_value( $compare, $second );
if ( false !== $value ) {
$return[] = "SECOND( $column ) $compare $value";
}

return implode( ' AND ', $return );
}

// Cases where just one unit is set.
if ( isset( $hour ) && ! isset( $minute ) && ! isset( $second ) ) {
$value = $this->build_value( $compare, $hour );
if ( false !== $value ) {
return "HOUR( $column ) $compare $value";
}
} elseif ( ! isset( $hour ) && isset( $minute ) && ! isset( $second ) ) {
$value = $this->build_value( $compare, $minute );
if ( false !== $value ) {
return "MINUTE( $column ) $compare $value";
}
} elseif ( ! isset( $hour ) && ! isset( $minute ) && isset( $second ) ) {
$value = $this->build_value( $compare, $second );
if ( false !== $value ) {
return "SECOND( $column ) $compare $value";
}
}

// Single units were already handled. Since hour & second isn't allowed, minute must to be set.
if ( ! isset( $minute ) ) {
return false;
}

$format = '';
$time = '';

// Hour.
if ( null !== $hour ) {
$format .= '%H.';
$time .= sprintf( '%02d', $hour ) . '.';
} else {
$format .= '0.';
$time .= '0.';
}

// Minute.
$format .= '%i';
$time .= sprintf( '%02d', $minute );

if ( isset( $second ) ) {
$format .= '%s';
$time .= sprintf( '%02d', $second );
}

return $wpdb->prepare( "DATE_FORMAT( $column, %s ) $compare %f", $format, $time );
}

/**
* Sanitizes a 'relation' operator.
*
* @since 6.0.3
*
* @param string $relation Raw relation key from the query argument.
* @return string Sanitized relation. Either 'AND' or 'OR'.
*/
public function sanitize_relation( $relation ) {
if ( 'OR' === strtoupper( $relation ) ) {
return 'OR';
} else {
return 'AND';
}
}
}