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pdo-document/src/Field.php
Daniel J. Summers d067f8983f Changes for beta10 (#5) 
- Add In/InArray support
- Add ORDER BY support for `Find` functions
- Update dependencies
- Implement fixes identified via static analysis

Reviewed-on: #5
2024-09-27 02:15:00 +00:00

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<?php
/**
* @author Daniel J. Summers <daniel@bitbadger.solutions>
* @license MIT
*/
declare(strict_types=1);
namespace BitBadger\PDODocument;
use Exception;
/**
* Criteria for a field WHERE clause
*/
class Field
{
/**
* Constructor
*
* NOTE: Use static construction methods rather than using this directly; different properties are required
* depending on the operation being performed. This is only public so it can be tested.
*
* @param string $fieldName The name of the field
* @param Op $op The operation by which the field will be compared
* @param mixed $value The value of the field
* @param string $paramName The name of the parameter to which this should be bound
* @param string $qualifier A table qualifier for the `data` column
*/
public function __construct(public string $fieldName = '', public Op $op = Op::Equal, public mixed $value = '',
public string $paramName = '', public string $qualifier = '') { }
/**
* Append the parameter name and value to the given associative array
*
* @param array<string, mixed> $existing The existing parameters
* @return array<string, mixed> The given parameter array with this field's name and value(s) appended
*/
public function appendParameter(array $existing): array
{
switch ($this->op) {
case Op::Exists:
case Op::NotExists:
break;
case Op::Between:
$existing["{$this->paramName}min"] = $this->value[0];
$existing["{$this->paramName}max"] = $this->value[1];
break;
case Op::In:
for ($idx = 0; $idx < count($this->value); $idx++) {
$existing["{$this->paramName}_$idx"] = $this->value[$idx];
}
break;
case Op::InArray:
$mkString = Configuration::mode("Append parameters for InArray condition") === Mode::PgSQL;
$values = $this->value['values'];
for ($idx = 0; $idx < count($values); $idx++) {
$existing["{$this->paramName}_$idx"] = $mkString ? "$values[$idx]" : $values[$idx];
}
break;
default:
$existing[$this->paramName] = $this->value;
}
return $existing;
}
/**
* Derive the path for this field
*
* @param bool $asJSON Whether the field should be treated as JSON in the query (optional, default false)
* @return string The path for this field
* @throws Exception If the database mode has not been set
*/
public function path(bool $asJSON = false): string
{
$extra = $asJSON ? '' : '>';
if (str_contains($this->fieldName, '.')) {
$mode = Configuration::mode('determine field path');
if ($mode === Mode::PgSQL) {
return "data#>$extra'{" . implode(',', explode('.', $this->fieldName)) . "}'";
}
if ($mode === Mode::SQLite) {
$parts = explode('.', $this->fieldName);
$last = array_pop($parts);
return "data->'" . implode("'->'", $parts) . "'->$extra'$last'";
}
}
return "data->$extra'$this->fieldName'";
}
/**
* Get the WHERE clause fragment for this parameter
*
* @return string The WHERE clause fragment for this parameter
* @throws Exception|DocumentException If the database mode has not been set
*/
public function toWhere(): string
{
$mode = Configuration::mode('make field WHERE clause');
$fieldName = (empty($this->qualifier) ? '' : "$this->qualifier.") . $this->path($this->op === Op::InArray);
$fieldPath = match ($mode) {
Mode::PgSQL => match (true) {
$this->op === Op::Between,
$this->op === Op::In => is_numeric($this->value[0]) ? "($fieldName)::numeric" : $fieldName,
is_numeric($this->value) => "($fieldName)::numeric",
default => $fieldName,
},
default => $fieldName,
};
$criteria = match ($this->op) {
Op::Exists,
Op::NotExists => '',
Op::Between => " {$this->paramName}min AND {$this->paramName}max",
Op::In => ' (' . $this->inParameterNames() . ')',
Op::InArray => $mode === Mode::PgSQL ? ' ARRAY[' . $this->inParameterNames() . ']' : '',
default => " $this->paramName",
};
return $mode === Mode::SQLite && $this->op === Op::InArray
? "EXISTS (SELECT 1 FROM json_each({$this->value['table']}.data, '\$.$this->fieldName') WHERE value IN ("
. $this->inParameterNames() . '))'
: $fieldPath . ' ' . $this->op->toSQL() . $criteria;
}
/**
* Create parameter names for an IN clause
*
* @return string A comma-delimited string of parameter names
*/
private function inParameterNames(): string
{
$values = $this->op === Op::In ? $this->value : $this->value['values'];
return implode(', ',
array_map(fn($value, $key) => "{$this->paramName}_$key", $values, range(0, count($values) - 1)));
}
/**
* Create an equals (=) field criterion
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for which equality will be checked
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function equal(string $fieldName, mixed $value, string $paramName = ''): self
{
return new self($fieldName, Op::Equal, $value, $paramName);
}
/**
* Create an equals (=) field criterion _(alias for `Field.equal`)_
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for which equality will be checked
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function EQ(string $fieldName, mixed $value, string $paramName = ''): self
{
return self::equal($fieldName, $value, $paramName);
}
/**
* Create a greater than (>) field criterion
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the greater than comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function greater(string $fieldName, mixed $value, string $paramName = ''): self
{
return new self($fieldName, Op::Greater, $value, $paramName);
}
/**
* Create a greater than (>) field criterion _(alias for `Field.greater`)_
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the greater than comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function GT(string $fieldName, mixed $value, string $paramName = ''): self
{
return self::greater($fieldName, $value, $paramName);
}
/**
* Create a greater than or equal to (>=) field criterion
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the greater than or equal to comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function greaterOrEqual(string $fieldName, mixed $value, string $paramName = ''): self
{
return new self($fieldName, Op::GreaterOrEqual, $value, $paramName);
}
/**
* Create a greater than or equal to (>=) field criterion _(alias for `Field.greaterOrEqual`)_
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the greater than or equal to comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function GE(string $fieldName, mixed $value, string $paramName = ''): self
{
return self::greaterOrEqual($fieldName, $value, $paramName);
}
/**
* Create a less than (<) field criterion
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the less than comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function less(string $fieldName, mixed $value, string $paramName = ''): self
{
return new self($fieldName, Op::Less, $value, $paramName);
}
/**
* Create a less than (<) field criterion _(alias for `Field.less`)_
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the less than comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function LT(string $fieldName, mixed $value, string $paramName = ''): self
{
return self::less($fieldName, $value, $paramName);
}
/**
* Create a less than or equal to (<=) field criterion
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the less than or equal to comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function lessOrEqual(string $fieldName, mixed $value, string $paramName = ''): self
{
return new self($fieldName, Op::LessOrEqual, $value, $paramName);
}
/**
* Create a less than or equal to (<=) field criterion _(alias for `Field.lessOrEqual`)_
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the less than or equal to comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function LE(string $fieldName, mixed $value, string $paramName = ''): self
{
return self::lessOrEqual($fieldName, $value, $paramName);
}
/**
* Create a not equals (<>) field criterion
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the not equals comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function notEqual(string $fieldName, mixed $value, string $paramName = ''): self
{
return new self($fieldName, Op::NotEqual, $value, $paramName);
}
/**
* Create a not equals (<>) field criterion _(alias for `Field.notEqual`)_
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $value The value for the not equals comparison
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function NE(string $fieldName, mixed $value, string $paramName = ''): self
{
return self::notEqual($fieldName, $value, $paramName);
}
/**
* Create a BETWEEN field criterion
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $minValue The lower value for range
* @param mixed $maxValue The upper value for the range
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function between(string $fieldName, mixed $minValue, mixed $maxValue, string $paramName = ''): self
{
return new self($fieldName, Op::Between, [$minValue, $maxValue], $paramName);
}
/**
* Create a BETWEEN field criterion _(alias for `Field.between`)_
*
* @param string $fieldName The name of the field against which the value will be compared
* @param mixed $minValue The lower value for range
* @param mixed $maxValue The upper value for the range
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function BT(string $fieldName, mixed $minValue, mixed $maxValue, string $paramName = ''): self
{
return self::between($fieldName, $minValue, $maxValue, $paramName);
}
/**
* Create an IN field criterion
*
* @param string $fieldName The name of the field against which the values will be compared
* @param mixed[] $values The potential matching values for the field
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function in(string $fieldName, array $values, string $paramName = ''): self
{
return new self($fieldName, Op::In, $values, $paramName);
}
/**
* Create an IN ARRAY field criterion
*
* @param string $fieldName The name of the field against which the values will be compared
* @param string $tableName The table name where this field is located
* @param mixed[] $values The potential matching values for the field
* @param string $paramName The name of the parameter to which this should be bound (optional; generated if blank)
* @return self The field with the requested criterion
*/
public static function inArray(string $fieldName, string $tableName, array $values, string $paramName = ''): self
{
return new self($fieldName, Op::InArray, ['table' => $tableName, 'values' => $values], $paramName);
}
/**
* Create an exists (IS NOT NULL) field criterion
*
* @param string $fieldName The name of the field for which existence will be checked
* @return self The field with the requested criterion
*/
public static function exists(string $fieldName): self
{
return new self($fieldName, Op::Exists, '', '');
}
/**
* Create an exists (IS NOT NULL) field criterion _(alias for `Field.exists`)_
*
* @param string $fieldName The name of the field for which existence will be checked
* @return self The field with the requested criterion
*/
public static function EX(string $fieldName): self
{
return self::exists($fieldName);
}
/**
* Create a not exists (IS NULL) field criterion
*
* @param string $fieldName The name of the field for which non-existence will be checked
* @return self The field with the requested criterion
*/
public static function notExists(string $fieldName): self
{
return new self($fieldName, Op::NotExists, '', '');
}
/**
* Create a not exists (IS NULL) field criterion _(alias for `Field.notExists`)_
*
* @param string $fieldName The name of the field for which non-existence will be checked
* @return self The field with the requested criterion
*/
public static function NEX(string $fieldName): self
{
return self::notExists($fieldName);
}
/**
* Create a named fields (used for creating fields for ORDER BY clauses)
*
* Prepend the field name with 'n:' to treat the field as a number; prepend the field name with 'i:' to perform
* a case-insensitive ordering.
*
* @param string $name The name of the field, plus any direction for the ordering
* @return self
*/
public static function named(string $name): self
{
return new self($name, Op::Equal, '', '');
}
}
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