TDBMSchemaAnalyzer::getSchema() - Code Metrics - Inspection of "WIP: 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 2019-09-02 15:30 UTC

TDBMSchemaAnalyzer::getSchema() A

↳ Parent: TDBMSchemaAnalyzer

Complexity

Conditions	4
Paths	4

Size

Total Lines	19
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	14
c	0
b	0
f	0
dl	0
loc	19
rs	9.7998
cc	4
nc	4
nop	0

<?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;
use TheCodingMachine\TDBM\Utils\RootProjectLocator;

/**
 * This class is used to analyze the schema and return valuable information / hints.
 */
class TDBMSchemaAnalyzer
{
    const schemaFileName =  'tdbm.lock.yml';

    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
     */
    public function __construct(Connection $connection, Cache $cache, SchemaAnalyzer $schemaAnalyzer)
    {
        $this->connection = $connection;
        $this->cache = $cache;
        $this->schemaAnalyzer = $schemaAnalyzer;
        $this->schemaVersionControlService = new SchemaVersionControlService($this->connection, self::getLockFilePath());
    }

    /**
     * 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 static function getLockFilePath(): string
    {
        return RootProjectLocator::getRootLocationPath().self::schemaFileName;
    }

    /**
     * Returns the (cached) schema.
     *
     * @return Schema
     */
    public function getSchema(): Schema
    {
        if ($this->schema === null) {
            $cacheKey = $this->getCachePrefix().'_immutable_schema';
            if ($this->cache->contains($cacheKey)) {
                $this->schema = $this->cache->fetch($cacheKey);
            } elseif (file_exists(self::getLockFilePath())) {
                $this->schema = $this->schemaVersionControlService->loadSchemaFile();
                ImmutableCaster::castSchemaToImmutable($this->schema);
                $this->cache->save($cacheKey, $this->schema);
            } else {
                $this->schema = $this->connection->getSchemaManager()->createSchema();
                $this->generateLockFile();
                ImmutableCaster::castSchemaToImmutable($this->schema);
                $this->cache->save($cacheKey, $this->schema);
            }
        }

        return $this->schema;
    }

    public function generateLockFile(): void
    {
        $this->schemaVersionControlService->dumpSchema();
    }

    /**
     * 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			use TheCodingMachine\TDBM\Utils\RootProjectLocator;
18
19			/**
20			* This class is used to analyze the schema and return valuable information / hints.
21			*/
22			class TDBMSchemaAnalyzer
23			{
24			const schemaFileName = 'tdbm.lock.yml';
25
26			private $connection;
27
28			/**
29			* @var Schema
30			*/
31			private $schema;
32
33			/**
34			* @var string
35			*/
36			private $cachePrefix;
37
38			/**
39			* @var Cache
40			*/
41			private $cache;
42
43			/**
44			* @var SchemaAnalyzer
45			*/
46			private $schemaAnalyzer;
47
48			/**
49			* @var SchemaVersionControlService
50			*/
51			private $schemaVersionControlService;
52
53			/**
54			* @param Connection $connection The DBAL DB connection to use
55			* @param Cache $cache A cache service to be used
56			* @param SchemaAnalyzer $schemaAnalyzer The schema analyzer that will be used to find shortest paths...
57			* Will be automatically created if not passed
58			*/
59			public function __construct(Connection $connection, Cache $cache, SchemaAnalyzer $schemaAnalyzer)
60			{
61			$this->connection = $connection;
62			$this->cache = $cache;
63			$this->schemaAnalyzer = $schemaAnalyzer;
64			$this->schemaVersionControlService = new SchemaVersionControlService($this->connection, self::getLockFilePath());
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 $this->cachePrefix;
79			}
80
81			public static function getLockFilePath(): string
82			{
83			return RootProjectLocator::getRootLocationPath().self::schemaFileName;
84			}
85
86			/**
87			* Returns the (cached) schema.
88			*
89			* @return Schema
90			*/
91			public function getSchema(): Schema
92			{
93			if ($this->schema === null) {
94			$cacheKey = $this->getCachePrefix().'_immutable_schema';
95			if ($this->cache->contains($cacheKey)) {
96			$this->schema = $this->cache->fetch($cacheKey);
97			} elseif (file_exists(self::getLockFilePath())) {
98			$this->schema = $this->schemaVersionControlService->loadSchemaFile();
99			ImmutableCaster::castSchemaToImmutable($this->schema);
100			$this->cache->save($cacheKey, $this->schema);
101			} else {
102			$this->schema = $this->connection->getSchemaManager()->createSchema();
103			$this->generateLockFile();
104			ImmutableCaster::castSchemaToImmutable($this->schema);
105			$this->cache->save($cacheKey, $this->schema);
106			}
107			}
108
109			return $this->schema;
110			}
111
112			public function generateLockFile(): void
113			{
114			$this->schemaVersionControlService->dumpSchema();
115			}
116
117			/**
118			* Returns the list of pivot tables linked to table $tableName.
119			*
120			* @param string $tableName
121			*
122			* @return string[]
123			*/
124			public function getPivotTableLinkedToTable(string $tableName): array
125			{
126			$cacheKey = $this->getCachePrefix().'_pivottables_link_'.$tableName;
127			if ($this->cache->contains($cacheKey)) {
128			return $this->cache->fetch($cacheKey);
129			}
130
131			$pivotTables = [];
132
133			$junctionTables = $this->schemaAnalyzer->detectJunctionTables(true);
134			foreach ($junctionTables as $table) {
135			$fks = $table->getForeignKeys();
136			foreach ($fks as $fk) {
137			if ($fk->getForeignTableName() == $tableName) {
138			$pivotTables[] = $table->getName();
139			break;
140			}
141			}
142			}
143
144			$this->cache->save($cacheKey, $pivotTables);
145
146			return $pivotTables;
147			}
148
149			/**
150			* Returns the list of foreign keys pointing to the table represented by this bean, excluding foreign keys
151			* from junction tables and from inheritance.
152			* It will also suppress doubles if 2 foreign keys are using the same columns.
153			*
154			* @return ForeignKeyConstraint[]
155			*/
156			public function getIncomingForeignKeys(string $tableName): array
157			{
158			$junctionTables = $this->schemaAnalyzer->detectJunctionTables(true);
159			$junctionTableNames = array_map(function (Table $table) {
160			return $table->getName();
161			}, $junctionTables);
162			$childrenRelationships = $this->schemaAnalyzer->getChildrenRelationships($tableName);
163
164			$fks = [];
165			foreach ($this->getSchema()->getTables() as $table) {
166			$uniqueForeignKeys = $this->removeDuplicates($table->getForeignKeys());
167			foreach ($uniqueForeignKeys as $fk) {
168			if ($fk->getForeignTableName() === $tableName) {
169			if (in_array($fk->getLocalTableName(), $junctionTableNames)) {
170			continue;
171			}
172			foreach ($childrenRelationships as $childFk) {
173			if ($fk->getLocalTableName() === $childFk->getLocalTableName() && $fk->getUnquotedLocalColumns() === $childFk->getUnquotedLocalColumns()) {
174			continue 2;
175			}
176			}
177			$fks[] = $fk;
178			}
179			}
180			}
181
182			return $fks;
183			}
184
185			/**
186			* Remove duplicate foreign keys (assumes that all foreign yes are from the same local table)
187			*
188			* @param ForeignKeyConstraint[] $foreignKeys
189			* @return ForeignKeyConstraint[]
190			*/
191			private function removeDuplicates(array $foreignKeys): array
192			{
193			$fks = [];
194			foreach ($foreignKeys as $foreignKey) {
195			$key = implode('__`__', $foreignKey->getUnquotedLocalColumns());
196			if (!isset($fks[$key])) {
197			$fks[$key] = $foreignKey;
198			}
199			}
200
201			return array_values($fks);
202			}
203			}
204

thecodingmachine / tdbm

Pull Request — master (#171)

TDBMSchemaAnalyzer::getSchema() A

Complexity

Size

Duplication

Importance

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