TDBMSchemaAnalyzer::getPivotTableLinkedToTable() - Code Metrics - Inspection of "added a schema lock file to tdbm" - thecodingmachine/tdbm - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#171)

by ARP

created 2019-09-24 14:37 UTC

TDBMSchemaAnalyzer::getPivotTableLinkedToTable() A

↳ Parent: TDBMSchemaAnalyzer

Complexity

Conditions	5
Paths	5

Size

Total Lines	23
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	13
dl	0
loc	23
rs	9.5222
c	0
b	0
f	0
cc	5
nc	5
nop	1

<?php
declare(strict_types=1);

namespace TheCodingMachine\TDBM;

use BrainDiminished\SchemaVersionControl\SchemaVersionControlService;
use Doctrine\Common\Cache\Cache;
use Doctrine\DBAL\Connection;
use Doctrine\DBAL\Schema\Column;
use Doctrine\DBAL\Schema\ForeignKeyConstraint;
use Doctrine\DBAL\Schema\Schema;
use Doctrine\DBAL\Schema\Table;
use Doctrine\DBAL\Types\DateType;
use Doctrine\DBAL\Types\Type;
use Mouf\Database\SchemaAnalyzer\SchemaAnalyzer;
use TheCodingMachine\TDBM\Utils\ImmutableCaster;

/**
 * This class is used to analyze the schema and return valuable information / hints.
 */
class TDBMSchemaAnalyzer
{
    private $lockFilePath;
    private $connection;

    /**
     * @var Schema
     */
    private $schema;

    /**
     * @var string
     */
    private $cachePrefix;

    /**
     * @var Cache
     */
    private $cache;

    /**
     * @var SchemaAnalyzer
     */
    private $schemaAnalyzer;

    /**
     * @var SchemaVersionControlService
     */
    private $schemaVersionControlService;

    /**
     * @param Connection $connection The DBAL DB connection to use
     * @param Cache $cache A cache service to be used
     * @param SchemaAnalyzer $schemaAnalyzer The schema analyzer that will be used to find shortest paths...
     *                                       Will be automatically created if not passed
     * @param string $lockFilePath The path for the lock file which will store the database schema
     */
    public function __construct(Connection $connection, Cache $cache, SchemaAnalyzer $schemaAnalyzer, string $lockFilePath)
    {
        $this->connection = $connection;
        $this->cache = $cache;
        $this->schemaAnalyzer = $schemaAnalyzer;
        $this->lockFilePath = $lockFilePath;
        $this->schemaVersionControlService = new SchemaVersionControlService($this->connection, $this->lockFilePath);
    }

    /**
     * Returns a unique ID for the current connection. Useful for namespacing cache entries in the current connection.
     *
     * @return string
     */
    public function getCachePrefix(): string
    {
        if ($this->cachePrefix === null) {
            $this->cachePrefix = hash('md4', $this->connection->getHost().'-'.$this->connection->getPort().'-'.$this->connection->getDatabase().'-'.$this->connection->getDriver()->getName());
        }

        return $this->cachePrefix;
    }

    public function getLockFilePath(): string
    {
        return $this->lockFilePath;
    }

    /**
     * Returns the (cached) schema.
     */
    public function getSchema(bool $ignoreCache = false): Schema
    {
        if ($this->schema === null) {
            $cacheKey = $this->getCachePrefix().'_immutable_schema';
            if (!$ignoreCache && $this->cache->contains($cacheKey)) {
                $this->schema = $this->cache->fetch($cacheKey);
            } elseif (!file_exists($this->getLockFilePath())) {
                throw new TDBMException('No tdbm lock file found. Please regenerate DAOs and Beans.');
            } else {
                $this->schema = $this->schemaVersionControlService->loadSchemaFile();
                ImmutableCaster::castSchemaToImmutable($this->schema);
                $this->cache->save($cacheKey, $this->schema);
            }
        }

        return $this->schema;
    }

    public function generateLockFile(): void
    {
        $this->schemaVersionControlService->dumpSchema();
        \chmod($this->getLockFilePath(), 0664);
    }

    /**
     * Returns the list of pivot tables linked to table $tableName.
     *
     * @param string $tableName
     *
     * @return string[]
     */
    public function getPivotTableLinkedToTable(string $tableName): array
    {
        $cacheKey = $this->getCachePrefix().'_pivottables_link_'.$tableName;
        if ($this->cache->contains($cacheKey)) {
            return $this->cache->fetch($cacheKey);
        }

        $pivotTables = [];

        $junctionTables = $this->schemaAnalyzer->detectJunctionTables(true);
        foreach ($junctionTables as $table) {
            $fks = $table->getForeignKeys();
            foreach ($fks as $fk) {
                if ($fk->getForeignTableName() == $tableName) {
                    $pivotTables[] = $table->getName();
                    break;
                }
            }
        }

        $this->cache->save($cacheKey, $pivotTables);

        return $pivotTables;
    }

    /**
     * Returns the list of foreign keys pointing to the table represented by this bean, excluding foreign keys
     * from junction tables and from inheritance.
     * It will also suppress doubles if 2 foreign keys are using the same columns.
     *
     * @return ForeignKeyConstraint[]
     */
    public function getIncomingForeignKeys(string $tableName): array
    {
        $junctionTables = $this->schemaAnalyzer->detectJunctionTables(true);
        $junctionTableNames = array_map(function (Table $table) {
            return $table->getName();
        }, $junctionTables);
        $childrenRelationships = $this->schemaAnalyzer->getChildrenRelationships($tableName);

        $fks = [];
        foreach ($this->getSchema()->getTables() as $table) {
            $uniqueForeignKeys = $this->removeDuplicates($table->getForeignKeys());
            foreach ($uniqueForeignKeys as $fk) {
                if ($fk->getForeignTableName() === $tableName) {
                    if (in_array($fk->getLocalTableName(), $junctionTableNames)) {
                        continue;
                    }
                    foreach ($childrenRelationships as $childFk) {
                        if ($fk->getLocalTableName() === $childFk->getLocalTableName() && $fk->getUnquotedLocalColumns() === $childFk->getUnquotedLocalColumns()) {
                            continue 2;
                        }
                    }
                    $fks[] = $fk;
                }
            }
        }

        return $fks;
    }

    /**
     * Remove duplicate foreign keys (assumes that all foreign yes are from the same local table)
     *
     * @param ForeignKeyConstraint[] $foreignKeys
     * @return ForeignKeyConstraint[]
     */
    private function removeDuplicates(array $foreignKeys): array
    {
        $fks = [];
        foreach ($foreignKeys as $foreignKey) {
            $key = implode('__`__', $foreignKey->getUnquotedLocalColumns());
            if (!isset($fks[$key])) {
                $fks[$key] = $foreignKey;
            }
        }

        return array_values($fks);
    }
}


1			<?php
2			declare(strict_types=1);
3
4			namespace TheCodingMachine\TDBM;
5
6			use BrainDiminished\SchemaVersionControl\SchemaVersionControlService;
7			use Doctrine\Common\Cache\Cache;
8			use Doctrine\DBAL\Connection;
9			use Doctrine\DBAL\Schema\Column;
10			use Doctrine\DBAL\Schema\ForeignKeyConstraint;
11			use Doctrine\DBAL\Schema\Schema;
12			use Doctrine\DBAL\Schema\Table;
13			use Doctrine\DBAL\Types\DateType;
14			use Doctrine\DBAL\Types\Type;
15			use Mouf\Database\SchemaAnalyzer\SchemaAnalyzer;
16			use TheCodingMachine\TDBM\Utils\ImmutableCaster;
17
18			/**
19			* This class is used to analyze the schema and return valuable information / hints.
20			*/
21			class TDBMSchemaAnalyzer
22			{
23			private $lockFilePath;
24			private $connection;
25
26			/**
27			* @var Schema
28			*/
29			private $schema;
30
31			/**
32			* @var string
33			*/
34			private $cachePrefix;
35
36			/**
37			* @var Cache
38			*/
39			private $cache;
40
41			/**
42			* @var SchemaAnalyzer
43			*/
44			private $schemaAnalyzer;
45
46			/**
47			* @var SchemaVersionControlService
48			*/
49			private $schemaVersionControlService;
50
51			/**
52			* @param Connection $connection The DBAL DB connection to use
53			* @param Cache $cache A cache service to be used
54			* @param SchemaAnalyzer $schemaAnalyzer The schema analyzer that will be used to find shortest paths...
55			* Will be automatically created if not passed
56			* @param string $lockFilePath The path for the lock file which will store the database schema
57			*/
58			public function __construct(Connection $connection, Cache $cache, SchemaAnalyzer $schemaAnalyzer, string $lockFilePath)
59			{
60			$this->connection = $connection;
61			$this->cache = $cache;
62			$this->schemaAnalyzer = $schemaAnalyzer;
63			$this->lockFilePath = $lockFilePath;
64			$this->schemaVersionControlService = new SchemaVersionControlService($this->connection, $this->lockFilePath);
65			}
66
67			/**
68			* Returns a unique ID for the current connection. Useful for namespacing cache entries in the current connection.
69			*
70			* @return string
71			*/
72			public function getCachePrefix(): string
73			{
74			if ($this->cachePrefix === null) {
75			$this->cachePrefix = hash('md4', $this->connection->getHost().'-'.$this->connection->getPort().'-'.$this->connection->getDatabase().'-'.$this->connection->getDriver()->getName());
76			}
77
78			return $this->cachePrefix;
79			}
80
81			public function getLockFilePath(): string
82			{
83			return $this->lockFilePath;
84			}
85
86			/**
87			* Returns the (cached) schema.
88			*/
89			public function getSchema(bool $ignoreCache = false): Schema
90			{
91			if ($this->schema === null) {
92			$cacheKey = $this->getCachePrefix().'_immutable_schema';
93			if (!$ignoreCache && $this->cache->contains($cacheKey)) {
94			$this->schema = $this->cache->fetch($cacheKey);
95			} elseif (!file_exists($this->getLockFilePath())) {
96			throw new TDBMException('No tdbm lock file found. Please regenerate DAOs and Beans.');
97			} else {
98			$this->schema = $this->schemaVersionControlService->loadSchemaFile();
99			ImmutableCaster::castSchemaToImmutable($this->schema);
100			$this->cache->save($cacheKey, $this->schema);
101			}
102			}
103
104			return $this->schema;
105			}
106
107			public function generateLockFile(): void
108			{
109			$this->schemaVersionControlService->dumpSchema();
110			\chmod($this->getLockFilePath(), 0664);
111			}
112
113			/**
114			* Returns the list of pivot tables linked to table $tableName.
115			*
116			* @param string $tableName
117			*
118			* @return string[]
119			*/
120			public function getPivotTableLinkedToTable(string $tableName): array
121			{
122			$cacheKey = $this->getCachePrefix().'_pivottables_link_'.$tableName;
123			if ($this->cache->contains($cacheKey)) {
124			return $this->cache->fetch($cacheKey);
125			}
126
127			$pivotTables = [];
128
129			$junctionTables = $this->schemaAnalyzer->detectJunctionTables(true);
130			foreach ($junctionTables as $table) {
131			$fks = $table->getForeignKeys();
132			foreach ($fks as $fk) {
133			if ($fk->getForeignTableName() == $tableName) {
134			$pivotTables[] = $table->getName();
135			break;
136			}
137			}
138			}
139
140			$this->cache->save($cacheKey, $pivotTables);
141
142			return $pivotTables;
143			}
144
145			/**
146			* Returns the list of foreign keys pointing to the table represented by this bean, excluding foreign keys
147			* from junction tables and from inheritance.
148			* It will also suppress doubles if 2 foreign keys are using the same columns.
149			*
150			* @return ForeignKeyConstraint[]
151			*/
152			public function getIncomingForeignKeys(string $tableName): array
153			{
154			$junctionTables = $this->schemaAnalyzer->detectJunctionTables(true);
155			$junctionTableNames = array_map(function (Table $table) {
156			return $table->getName();
157			}, $junctionTables);
158			$childrenRelationships = $this->schemaAnalyzer->getChildrenRelationships($tableName);
159
160			$fks = [];
161			foreach ($this->getSchema()->getTables() as $table) {
162			$uniqueForeignKeys = $this->removeDuplicates($table->getForeignKeys());
163			foreach ($uniqueForeignKeys as $fk) {
164			if ($fk->getForeignTableName() === $tableName) {
165			if (in_array($fk->getLocalTableName(), $junctionTableNames)) {
166			continue;
167			}
168			foreach ($childrenRelationships as $childFk) {
169			if ($fk->getLocalTableName() === $childFk->getLocalTableName() && $fk->getUnquotedLocalColumns() === $childFk->getUnquotedLocalColumns()) {
170			continue 2;
171			}
172			}
173			$fks[] = $fk;
174			}
175			}
176			}
177
178			return $fks;
179			}
180
181			/**
182			* Remove duplicate foreign keys (assumes that all foreign yes are from the same local table)
183			*
184			* @param ForeignKeyConstraint[] $foreignKeys
185			* @return ForeignKeyConstraint[]
186			*/
187			private function removeDuplicates(array $foreignKeys): array
188			{
189			$fks = [];
190			foreach ($foreignKeys as $foreignKey) {
191			$key = implode('__`__', $foreignKey->getUnquotedLocalColumns());
192			if (!isset($fks[$key])) {
193			$fks[$key] = $foreignKey;
194			}
195			}
196
197			return array_values($fks);
198			}
199			}
200

thecodingmachine / tdbm

Pull Request — master (#171)

TDBMSchemaAnalyzer::getPivotTableLinkedToTable() A

Complexity

Size

Duplication

Importance

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