Grammar::nextQueryPos() - Code Metrics - Inspection of "Code improvement." - lagdo/dbadmin-driver - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — main ( ccb13a...a45c19 )

by Thierry

created 2021-11-14 06:09 UTC

Grammar::nextQueryPos() A

↳ Parent: Grammar

Complexity

Conditions	5
Paths	3

Size

Total Lines	19
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	5
eloc	12
nc	3
nop	1
dl	0
loc	19
rs	9.5555
c	1
b	0
f	0

<?php

namespace Lagdo\DbAdmin\Driver\Db;

use Lagdo\DbAdmin\Driver\Entity\TableSelectEntity;
use Lagdo\DbAdmin\Driver\Entity\ForeignKeyEntity;
use Lagdo\DbAdmin\Driver\Entity\QueryEntity;

use Lagdo\DbAdmin\Driver\DriverInterface;
use Lagdo\DbAdmin\Driver\UtilInterface;
use Lagdo\DbAdmin\Driver\TranslatorInterface;

use function preg_match;
use function preg_quote;
use function substr;
use function strlen;
use function is_string;
use function trim;
use function rtrim;
use function intval;
use function implode;
use function array_map;

abstract class Grammar implements GrammarInterface
{
    use GrammarTrait;

    /**
     * @var DriverInterface
     */
    protected $driver;

    /**
     * @var UtilInterface
     */
    protected $util;

    /**
     * @var TranslatorInterface
     */
    protected $trans;

    /**
     * @var ConnectionInterface
     */
    protected $connection;

    /**
     * The constructor
     *
     * @param DriverInterface $driver
     * @param UtilInterface $util
     * @param TranslatorInterface $trans
     * @param ConnectionInterface $connection
     */
    public function __construct(DriverInterface $driver, UtilInterface $util,
        TranslatorInterface $trans, ConnectionInterface $connection)
    {
        $this->driver = $driver;
        $this->util = $util;
        $this->trans = $trans;
        $this->connection = $connection;
    }

    /**
     * @inheritDoc
     */
    public function table(string $idf)
    {
        return $this->escapeId($idf);
    }

    /**
     * @inheritDoc
     */
    public function limit(string $query, string $where, int $limit, int $offset = 0)
    {
        $sql = " $query$where";
        if ($limit > 0) {
            $sql .= " LIMIT $limit";
            if ($offset > 0) {
                $sql .= " OFFSET $offset";
            }
        }
        return $sql;
    }

    /**
     * @param ForeignKeyEntity $foreignKey
     *
     * @return array
     */
    private function fkFields(ForeignKeyEntity $foreignKey)
    {
        $escape = function ($idf) { return $this->escapeId($idf); };
        return [
            implode(', ', array_map($escape, $foreignKey->source)),
            implode(', ', array_map($escape, $foreignKey->target)),
        ];
    }

    /**
     * @param ForeignKeyEntity $foreignKey
     *
     * @return string
     */
    private function fkTablePrefix(ForeignKeyEntity $foreignKey)
    {
        $prefix = '';
        if ($foreignKey->database !== '' && $foreignKey->database !== $this->driver->database()) {
            $prefix .= $this->escapeId($foreignKey->database) . '.';
        }
        if ($foreignKey->schema !== '' && $foreignKey->schema !== $this->driver->schema()) {
            $prefix .= $this->escapeId($foreignKey->schema) . '.';
        }
        return $prefix;
    }

    /**
     * @inheritDoc
     */
    public function formatForeignKey(ForeignKeyEntity $foreignKey)
    {
        [$sources, $targets] = $this->fkFields($foreignKey);
        $onActions = $this->driver->actions();
        $query = " FOREIGN KEY ($sources) REFERENCES " . $this->fkTablePrefix($foreignKey) .
            $this->table($foreignKey->table) . " ($targets)";
        if (preg_match("~^($onActions)\$~", $foreignKey->onDelete)) {
            $query .= " ON DELETE {$foreignKey->onDelete}";
        }
        if (preg_match("~^($onActions)\$~", $foreignKey->onUpdate)) {
            $query .= " ON UPDATE {$foreignKey->onUpdate}";
        }

        return $query;
    }

    /**
     * @inheritDoc
     */
    public function buildSelectQuery(TableSelectEntity $select)
    {
        $query = \implode(', ', $select->fields) . ' FROM ' . $this->table($select->table);
        $limit = +$select->limit;
        $offset = $select->page ? $limit * $select->page : 0;

        return 'SELECT' . $this->limit($query, $select->clauses, $limit, $offset);
    }

    /**
     * @inheritDoc
     */
    public function defaultValue($field)
    {
        $default = $field->default;
        return ($default === null ? '' : ' DEFAULT ' .
            (preg_match('~char|binary|text|enum|set~', $field->type) ||
            preg_match('~^(?![a-z])~i', $default) ? $this->connection->quote($default) : $default));
    }

    /**
     * @inheritDoc
     */
    public function convertFields(array $columns, array $fields, array $select = [])
    {
        $clause = '';
        foreach ($columns as $key => $val) {
            if (!empty($select) && !in_array($this->escapeId($key), $select)) {
                continue;
            }
            $as = $this->convertField($fields[$key]);
            if ($as) {
                $clause .= ', $as AS ' . $this->escapeId($key);
            }
        }
        return $clause;
    }

    /**
     * @inheritDoc
     */
    public function sqlForRowCount(string $table, array $where, bool $isGroup, array $groups)
    {
        $query = ' FROM ' . $this->table($table);
        if (!empty($where)) {
            $query .= ' WHERE ' . implode(' AND ', $where);
        }
        return ($isGroup && ($this->driver->jush() == 'sql' || count($groups) == 1) ?
            'SELECT COUNT(DISTINCT ' . implode(', ', $groups) . ")$query" :
            'SELECT COUNT(*)' . ($isGroup ? " FROM (SELECT 1$query GROUP BY " .
            implode(', ', $groups) . ') x' : $query)
        );
    }

    /**
     * @param QueryEntity $queryEntity
     *
     * @return bool
     */
    private function setDelimiter(QueryEntity $queryEntity)
    {
        $space = "(?:\\s|/\\*[\s\S]*?\\*/|(?:#|-- )[^\n]*\n?|--\r?\n)";
        if ($queryEntity->offset !== 0 ||
            !preg_match("~^$space*+DELIMITER\\s+(\\S+)~i", $queryEntity->queries, $match)) {
            return false;
        }
        $queryEntity->delimiter = $match[1];
        $queryEntity->queries = substr($queryEntity->queries, strlen($match[0]));
        return true;
    }

    /**
     * Return the regular expression for queries
     *
     * @return string
     */
    abstract protected function queryRegex();
    // Original code from Adminer
    // {
    //     $parse = '[\'"' .
    //         ($this->driver->jush() == "sql" ? '`#' :
    //         ($this->driver->jush() == "sqlite" ? '`[' :
    //         ($this->driver->jush() == "mssql" ? '[' : ''))) . ']|/\*|-- |$' .
    //         ($this->driver->jush() == "pgsql" ? '|\$[^$]*\$' : '');
    //     return "\\s*|$parse";
    // }

    /**
     * @param QueryEntity $queryEntity
     * @param string $found
     * @param array $match
     *
     * @return bool
     */
    private function notQuery(QueryEntity $queryEntity, string $found, array &$match)
    {
        return preg_match('(' . ($found == '/*' ? '\*/' : ($found == '[' ? ']' :
            (preg_match('~^-- |^#~', $found) ? "\n" : preg_quote($found) . "|\\\\."))) . '|$)s',
            $queryEntity->queries, $match, PREG_OFFSET_CAPTURE, $queryEntity->offset) > 0;
    }

    /**
     * @param QueryEntity $queryEntity
     * @param string $found
     *
     * @return void
     */
    private function skipComments(QueryEntity $queryEntity, string $found)
    {
        // Find matching quote or comment end
        $match = [];
        while ($this->notQuery($queryEntity, $found, $match)) {
            //! Respect sql_mode NO_BACKSLASH_ESCAPES
            $s = $match[0][0];
            $queryEntity->offset = $match[0][1] + strlen($s);
            if ($s[0] != "\\") {
                break;
            }
        }
    }

    /**
     * @param QueryEntity $queryEntity
     *
     * @return int
     */
    private function nextQueryPos(QueryEntity $queryEntity)
    {
        // TODO: Move this to driver implementations
        $parse = $this->queryRegex();
        $delimiter = preg_quote($queryEntity->delimiter);
        // Should always match
        preg_match("($delimiter$parse)", $queryEntity->queries, $match,
            PREG_OFFSET_CAPTURE, $queryEntity->offset);
        [$found, $pos] = $match[0];
        if (!is_string($found) && $queryEntity->queries == '') {
            return -1;
        }
        $queryEntity->offset = $pos + strlen($found);
        if (empty($found) || rtrim($found) == $queryEntity->delimiter) {
            return intval($pos);
        }
        // Find matching quote or comment end
        $this->skipComments($queryEntity, $found);
        return 0;
    }

    /**
     * @inheritDoc
     */
    public function parseQueries(QueryEntity $queryEntity)
    {
        $queryEntity->queries = trim($queryEntity->queries);
        while ($queryEntity->queries !== '') {
            if ($this->setDelimiter($queryEntity)) {
                continue;
            }
            $pos = $this->nextQueryPos($queryEntity);
            if ($pos < 0) {
                return false;
            }
            if ($pos === 0) {
                continue;
            }
            // End of a query
            $queryEntity->query = substr($queryEntity->queries, 0, $pos);
            $queryEntity->queries = substr($queryEntity->queries, $queryEntity->offset);
            $queryEntity->offset = 0;
            return true;
        }
        return false;
    }
}


1			<?php
2
3			namespace Lagdo\DbAdmin\Driver\Db;
4
5			use Lagdo\DbAdmin\Driver\Entity\TableSelectEntity;
6			use Lagdo\DbAdmin\Driver\Entity\ForeignKeyEntity;
7			use Lagdo\DbAdmin\Driver\Entity\QueryEntity;
8
9			use Lagdo\DbAdmin\Driver\DriverInterface;
10			use Lagdo\DbAdmin\Driver\UtilInterface;
11			use Lagdo\DbAdmin\Driver\TranslatorInterface;
12
13			use function preg_match;
14			use function preg_quote;
15			use function substr;
16			use function strlen;
17			use function is_string;
18			use function trim;
19			use function rtrim;
20			use function intval;
21			use function implode;
22			use function array_map;
23
24			abstract class Grammar implements GrammarInterface
25			{
26			use GrammarTrait;
27
28			/**
29			* @var DriverInterface
30			*/
31			protected $driver;
32
33			/**
34			* @var UtilInterface
35			*/
36			protected $util;
37
38			/**
39			* @var TranslatorInterface
40			*/
41			protected $trans;
42
43			/**
44			* @var ConnectionInterface
45			*/
46			protected $connection;
47
48			/**
49			* The constructor
50			*
51			* @param DriverInterface $driver
52			* @param UtilInterface $util
53			* @param TranslatorInterface $trans
54			* @param ConnectionInterface $connection
55			*/
56			public function __construct(DriverInterface $driver, UtilInterface $util,
57			TranslatorInterface $trans, ConnectionInterface $connection)
58			{
59			$this->driver = $driver;
60			$this->util = $util;
61			$this->trans = $trans;
62			$this->connection = $connection;
63			}
64
65			/**
66			* @inheritDoc
67			*/
68			public function table(string $idf)
69			{
70			return $this->escapeId($idf);
71			}
72
73			/**
74			* @inheritDoc
75			*/
76			public function limit(string $query, string $where, int $limit, int $offset = 0)
77			{
78			$sql = " $query$where";
79			if ($limit > 0) {
80			$sql .= " LIMIT $limit";
81			if ($offset > 0) {
82			$sql .= " OFFSET $offset";
83			}
84			}
85			return $sql;
86			}
87
88			/**
89			* @param ForeignKeyEntity $foreignKey
90			*
91			* @return array
92			*/
93			private function fkFields(ForeignKeyEntity $foreignKey)
94			{
95			$escape = function ($idf) { return $this->escapeId($idf); };
96			return [
97			implode(', ', array_map($escape, $foreignKey->source)),
98			implode(', ', array_map($escape, $foreignKey->target)),
99			];
100			}
101
102			/**
103			* @param ForeignKeyEntity $foreignKey
104			*
105			* @return string
106			*/
107			private function fkTablePrefix(ForeignKeyEntity $foreignKey)
108			{
109			$prefix = '';
110			if ($foreignKey->database !== '' && $foreignKey->database !== $this->driver->database()) {
111			$prefix .= $this->escapeId($foreignKey->database) . '.';
112			}
113			if ($foreignKey->schema !== '' && $foreignKey->schema !== $this->driver->schema()) {
114			$prefix .= $this->escapeId($foreignKey->schema) . '.';
115			}
116			return $prefix;
117			}
118
119			/**
120			* @inheritDoc
121			*/
122			public function formatForeignKey(ForeignKeyEntity $foreignKey)
123			{
124			[$sources, $targets] = $this->fkFields($foreignKey);
125			$onActions = $this->driver->actions();
126			$query = " FOREIGN KEY ($sources) REFERENCES " . $this->fkTablePrefix($foreignKey) .
127			$this->table($foreignKey->table) . " ($targets)";
128			if (preg_match("~^($onActions)\$~", $foreignKey->onDelete)) {
129			$query .= " ON DELETE {$foreignKey->onDelete}";
130			}
131			if (preg_match("~^($onActions)\$~", $foreignKey->onUpdate)) {
132			$query .= " ON UPDATE {$foreignKey->onUpdate}";
133			}
134
135			return $query;
136			}
137
138			/**
139			* @inheritDoc
140			*/
141			public function buildSelectQuery(TableSelectEntity $select)
142			{
143			$query = \implode(', ', $select->fields) . ' FROM ' . $this->table($select->table);
144			$limit = +$select->limit;
145			$offset = $select->page ? $limit * $select->page : 0;
146
147			return 'SELECT' . $this->limit($query, $select->clauses, $limit, $offset);
148			}
149
150			/**
151			* @inheritDoc
152			*/
153			public function defaultValue($field)
154			{
155			$default = $field->default;
156			return ($default === null ? '' : ' DEFAULT ' .
157			(preg_match('~char\|binary\|text\|enum\|set~', $field->type) \|\|
158			preg_match('~^(?![a-z])~i', $default) ? $this->connection->quote($default) : $default));
159			}
160
161			/**
162			* @inheritDoc
163			*/
164			public function convertFields(array $columns, array $fields, array $select = [])
165			{
166			$clause = '';
167			foreach ($columns as $key => $val) {
168			if (!empty($select) && !in_array($this->escapeId($key), $select)) {
169			continue;
170			}
171			$as = $this->convertField($fields[$key]);
172			if ($as) {
173			$clause .= ', $as AS ' . $this->escapeId($key);
174			}
175			}
176			return $clause;
177			}
178
179			/**
180			* @inheritDoc
181			*/
182			public function sqlForRowCount(string $table, array $where, bool $isGroup, array $groups)
183			{
184			$query = ' FROM ' . $this->table($table);
185			if (!empty($where)) {
186			$query .= ' WHERE ' . implode(' AND ', $where);
187			}
188			return ($isGroup && ($this->driver->jush() == 'sql' \|\| count($groups) == 1) ?
189			'SELECT COUNT(DISTINCT ' . implode(', ', $groups) . ")$query" :
190			'SELECT COUNT(*)' . ($isGroup ? " FROM (SELECT 1$query GROUP BY " .
191			implode(', ', $groups) . ') x' : $query)
192			);
193			}
194
195			/**
196			* @param QueryEntity $queryEntity
197			*
198			* @return bool
199			*/
200			private function setDelimiter(QueryEntity $queryEntity)
201			{
202			$space = "(?:\\s\|/\\[\s\S]?\\/\|(?:#\|-- )[^\n]\n?\|--\r?\n)";
203			if ($queryEntity->offset !== 0 \|\|
204			!preg_match("~^$space*+DELIMITER\\s+(\\S+)~i", $queryEntity->queries, $match)) {
205			return false;
206			}
207			$queryEntity->delimiter = $match[1];
208			$queryEntity->queries = substr($queryEntity->queries, strlen($match[0]));
209			return true;
210			}
211
212			/**
213			* Return the regular expression for queries
214			*
215			* @return string
216			*/
217			abstract protected function queryRegex();
218			// Original code from Adminer
219			// {
220			// $parse = '[\'"' .
221			// ($this->driver->jush() == "sql" ? '`#' :
222			// ($this->driver->jush() == "sqlite" ? '`[' :
223			// ($this->driver->jush() == "mssql" ? '[' : ''))) . ']\|/\*\|-- \|$' .
224			// ($this->driver->jush() == "pgsql" ? '\|\$[^$]*\$' : '');
225			// return "\\s*\|$parse";
226			// }
227
228			/**
229			* @param QueryEntity $queryEntity
230			* @param string $found
231			* @param array $match
232			*
233			* @return bool
234			*/
235			private function notQuery(QueryEntity $queryEntity, string $found, array &$match)
236			{
237			return preg_match('(' . ($found == '/' ? '\/' : ($found == '[' ? ']' :
238			(preg_match('~^-- \|^#~', $found) ? "\n" : preg_quote($found) . "\|\\\\."))) . '\|$)s',
239			$queryEntity->queries, $match, PREG_OFFSET_CAPTURE, $queryEntity->offset) > 0;
240			}
241
242			/**
243			* @param QueryEntity $queryEntity
244			* @param string $found
245			*
246			* @return void
247			*/
248			private function skipComments(QueryEntity $queryEntity, string $found)
249			{
250			// Find matching quote or comment end
251			$match = [];
252			while ($this->notQuery($queryEntity, $found, $match)) {
253			//! Respect sql_mode NO_BACKSLASH_ESCAPES
254			$s = $match[0][0];
255			$queryEntity->offset = $match[0][1] + strlen($s);
256			if ($s[0] != "\\") {
257			break;
258			}
259			}
260			}
261
262			/**
263			* @param QueryEntity $queryEntity
264			*
265			* @return int
266			*/
267			private function nextQueryPos(QueryEntity $queryEntity)
268			{
269			// TODO: Move this to driver implementations
270			$parse = $this->queryRegex();
271			$delimiter = preg_quote($queryEntity->delimiter);
272			// Should always match
273			preg_match("($delimiter$parse)", $queryEntity->queries, $match,
274			PREG_OFFSET_CAPTURE, $queryEntity->offset);
275			[$found, $pos] = $match[0];
276			if (!is_string($found) && $queryEntity->queries == '') {
277			return -1;
278			}
279			$queryEntity->offset = $pos + strlen($found);
280			if (empty($found) \|\| rtrim($found) == $queryEntity->delimiter) {
281			return intval($pos);
282			}
283			// Find matching quote or comment end
284			$this->skipComments($queryEntity, $found);
285			return 0;
286			}
287
288			/**
289			* @inheritDoc
290			*/
291			public function parseQueries(QueryEntity $queryEntity)
292			{
293			$queryEntity->queries = trim($queryEntity->queries);
294			while ($queryEntity->queries !== '') {
295			if ($this->setDelimiter($queryEntity)) {
296			continue;
297			}
298			$pos = $this->nextQueryPos($queryEntity);
299			if ($pos < 0) {
300			return false;
301			}
302			if ($pos === 0) {
303			continue;
304			}
305			// End of a query
306			$queryEntity->query = substr($queryEntity->queries, 0, $pos);
307			$queryEntity->queries = substr($queryEntity->queries, $queryEntity->offset);
308			$queryEntity->offset = 0;
309			return true;
310			}
311			return false;
312			}
313			}
314

lagdo / dbadmin-driver

Push — main ( ccb13a...a45c19 )

Grammar::nextQueryPos() A

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like