Reflection::getUniqueGroups() - Code Metrics - Inspection of "Reflection :: reworked a bit" - hfw/db - Measure and Improve Code Quality continuously with Scrutinizer

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by y

created 2021-07-23 03:11 UTC

Reflection::getUniqueGroups() A

↳ Parent: Reflection

Complexity

Conditions	3
Paths	3

Size

Total Lines	9
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
eloc	5
nc	3
nop	0
dl	0
loc	9
rs	10
c	0
b	0
f	0

<?php

namespace Helix\DB;

use Helix\DB;
use ReflectionClass;
use ReflectionNamedType;
use ReflectionProperty;

/**
 * Interprets classes and annotations, and manipulates objects.
 *
 * > Programmer's Note: Manipulating subclasses through a parent's reflection is allowed.
 *
 * @method static static factory(DB $db, string|object $class)
 *
 * @TODO Allow column aliasing.
 */
class Reflection
{

    use FactoryTrait;

    protected const RX_RECORD = '/\*\h*@record\h+(?<table>\w+)/i';
    protected const RX_IS_COLUMN = '/\*\h*@col(umn)?\b/i';
    protected const RX_UNIQUE = '/^\h*\*\h*@unique\h*$/im';
    protected const RX_UNIQUE_GROUP = '/^\h*\*\h*@unique\h+(?<ident>[a-z_]+)\h*$/im';
    protected const RX_VAR = '/\*\h*@var\h+(?<type>\S+)/i'; // includes pipes and backslashes
    protected const RX_NULL = '/(\bnull\|)|(\|null\b)/i';
    protected const RX_EAV = '/\*\h*@eav\h+(?<table>\w+)/i';
    protected const RX_EAV_VAR = '/\*\h*@var\h+(?<type>\w+)\[\]/i'; // typed array
    protected const RX_JUNCTION = '/\*\h*@junction\h+(?<table>\w+)/i';
    protected const RX_FOREIGN = '/\*\h*@foreign\h+(?<column>\w+)\h+(?<class>\S+)/i';

    /**
     * Maps annotated/native scalar types to storage types acceptable for `settype()`
     *
     * @see Schema::T_CONST_NAMES keys
     */
    const SCALARS = [
        'bool' => 'bool',
        'boolean' => 'bool',    // gettype()
        'double' => 'float',    // gettype()
        'false' => 'bool',      // @var
        'float' => 'float',
        'int' => 'int',
        'integer' => 'int',     // gettype()
        'NULL' => 'string',     // gettype()
        'number' => 'string',   // @var
        'scalar' => 'string',   // @var
        'string' => 'string',
        'String' => 'String',   // @var
        'STRING' => 'STRING',   // @var
        'true' => 'bool',       // @var
    ];

    /**
     * @var ReflectionClass
     */
    protected $class;

    /**
     * @var string[]
     */
    protected $columns;

    /**
     * @var DB
     */
    protected $db;

    /**
     * @var array
     */
    protected $defaults = [];

    /**
     * @var ReflectionProperty[]
     */
    protected $properties = [];

    /**
     * @param DB $db
     * @param string|object $class
     */
    public function __construct(DB $db, $class)
    {
        $this->db = $db;
        $this->class = new ReflectionClass($class);
        $this->defaults = $this->class->getDefaultProperties();
        foreach ($this->class->getProperties() as $property) {
            $name = $property->getName();
            $property->setAccessible(true);
            $this->properties[$name] = $property;
            if ($this->isColumn($name)) {
                $this->columns[$name] = $name;
            }
        }
    }

    /**
     * @return string[]
     */
    final public function getColumns(): array
    {
        return $this->columns;
    }

    /**
     * @return EAV[]
     */
    public function getEav()
    {
        $EAV = [];
        foreach ($this->properties as $name => $prop) {
            $doc = $prop->getDocComment();
            if (preg_match(static::RX_EAV, $doc, $eav)) {
                preg_match(static::RX_EAV_VAR, $doc, $var);
                $type = $var['type'] ?? 'string';
                $type = static::SCALARS[$type] ?? 'string';
                $EAV[$name] = EAV::factory($this->db, $eav['table'], $type);
            }
        }
        return $EAV;
    }

    /**
     * Classes keyed by column.
     *
     * @return string[]
     */
    public function getForeignClasses(): array
    {
        preg_match_all(static::RX_FOREIGN, $this->class->getDocComment(), $foreign, PREG_SET_ORDER);
        return array_column($foreign, 'class', 'column');
    }

    /**
     * @return string
     */
    public function getJunctionTable(): string
    {
        preg_match(static::RX_JUNCTION, $this->class->getDocComment(), $junction);
        return $junction['table'];
    }

    /**
     * @return string
     */
    public function getRecordTable(): string
    {
        preg_match(static::RX_RECORD, $this->class->getDocComment(), $record);
        return $record['table'];
    }

    /**
     * Scalar storage type, or FQN of a complex type.
     *
     * @param string $property
     * @return string
     */
    public function getType(string $property): string
    {
        return $this->getType_reflection($property)
            ?? $this->getType_var($property)
            ?? static::SCALARS[gettype($this->defaults[$property])];
    }

    /**
     * @param string $property
     * @return null|string
     */
    protected function getType_reflection(string $property): ?string
    {
        if ($type = $this->properties[$property]->getType() and $type instanceof ReflectionNamedType) {
            return static::SCALARS[$type->getName()] ?? $type->getName();
        }
        return null;
    }

    /**
     * @param string $property
     * @return null|string
     */
    protected function getType_var(string $property): ?string
    {
        if (preg_match(static::RX_VAR, $this->properties[$property]->getDocComment(), $var)) {
            $type = preg_replace(static::RX_NULL, '', $var['type']); // remove null
            if (isset(static::SCALARS[$type])) {
                return static::SCALARS[$type];
            }
            // it's beyond the scope of this class to parse "use" statements (for now),
            // @var <CLASS> must be a FQN in order to work.
            return ltrim($type, '\\');
        }
        return null;
    }

    /**
     * Columns with their own individual unique constraints.
     *
     * @return string[]
     */
    public function getUnique(): array
    {
        return array_filter($this->columns, fn(string $property) => $this->isUnique($property));
    }

    /**
     * Table-level (multi-column) constraints are grouped under an arbitrary shared identifier.
     *
     * `[ shared identifier => [ col, ... ], ... ]`
     *
     * @return string[][]
     */
    public function getUniqueGroups(): array
    {
        $groups = [];
        foreach ($this->columns as $column) {
            if ($this->isUniqueMulti($column, $ident)) {
                $groups[$ident][$column] = $column;
            }
        }
        return $groups;
    }

    /**
     * Gets and returns a value through reflection.
     *
     * @param object $object
     * @param string $property
     * @return mixed
     */
    public function getValue(object $object, string $property)
    {
        return $this->properties[$property]->getValue($object);
    }

    /**
     * @param string $property
     * @return bool
     */
    public function isColumn(string $property): bool
    {
        return (bool)preg_match(static::RX_IS_COLUMN, $this->properties[$property]->getDocComment());
    }

    /**
     * Whether a property allows `NULL` as a value.
     *
     * @param string $property
     * @return bool
     */
    public function isNullable(string $property): bool
    {
        if ($type = $this->properties[$property]->getType()) {
            return $type->allowsNull();
        }
        if (preg_match(static::RX_VAR, $this->properties[$property]->getDocComment(), $var)) {
            return (bool)preg_match(static::RX_NULL, $var['type']);
        }
        return $this->defaults[$property] === null;
    }

    /**
     * @param string $column
     * @return bool
     */
    public function isUnique(string $column): bool
    {
        return (bool)preg_match(static::RX_UNIQUE, $this->properties[$column]->getDocComment());
    }

    /**
     * @param string $column
     * @param void $ident Updated to the group identifier.
     * @return bool
     */
    public function isUniqueMulti(string $column, &$ident = null): bool
    {
        if (preg_match(static::RX_UNIQUE_GROUP, $this->properties[$column]->getDocComment(), $unique)) {
            $ident = $unique['ident'];
            return true;
        }
        return false;
    }

    /**
     * @return object
     */
    public function newProto(): object
    {
        return $this->class->newInstanceWithoutConstructor();
    }

    /**
     * Sets a value through reflection.
     *
     * @param object $object
     * @param string $property
     * @param mixed $value
     */
    public function setValue(object $object, string $property, $value): void
    {
        $this->properties[$property]->setValue($object, $value);
    }
}


1			<?php
2
3			namespace Helix\DB;
4
5			use Helix\DB;
6			use ReflectionClass;
7			use ReflectionNamedType;
8			use ReflectionProperty;
9
10			/**
11			* Interprets classes and annotations, and manipulates objects.
12			*
13			* > Programmer's Note: Manipulating subclasses through a parent's reflection is allowed.
14			*
15			* @method static static factory(DB $db, string\|object $class)
16			*
17			* @TODO Allow column aliasing.
18			*/
19			class Reflection
20			{
21
22			use FactoryTrait;
23
24			protected const RX_RECORD = '/\\h@record\h+(?<table>\w+)/i';
25			protected const RX_IS_COLUMN = '/\\h@col(umn)?\b/i';
26			protected const RX_UNIQUE = '/^\h\\h@unique\h$/im';
27			protected const RX_UNIQUE_GROUP = '/^\h\\h@unique\h+(?<ident>[a-z_]+)\h$/im';
28			protected const RX_VAR = '/\\h@var\h+(?<type>\S+)/i'; // includes pipes and backslashes
29			protected const RX_NULL = '/(\bnull\\|)\|(\\|null\b)/i';
30			protected const RX_EAV = '/\\h@eav\h+(?<table>\w+)/i';
31			protected const RX_EAV_VAR = '/\\h@var\h+(?<type>\w+)\[\]/i'; // typed array
32			protected const RX_JUNCTION = '/\\h@junction\h+(?<table>\w+)/i';
33			protected const RX_FOREIGN = '/\\h@foreign\h+(?<column>\w+)\h+(?<class>\S+)/i';
34
35			/**
36			* Maps annotated/native scalar types to storage types acceptable for `settype()`
37			*
38			* @see Schema::T_CONST_NAMES keys
39			*/
40			const SCALARS = [
41			'bool' => 'bool',
42			'boolean' => 'bool', // gettype()
43			'double' => 'float', // gettype()
44			'false' => 'bool', // @var
45			'float' => 'float',
46			'int' => 'int',
47			'integer' => 'int', // gettype()
48			'NULL' => 'string', // gettype()
49			'number' => 'string', // @var
50			'scalar' => 'string', // @var
51			'string' => 'string',
52			'String' => 'String', // @var
53			'STRING' => 'STRING', // @var
54			'true' => 'bool', // @var
55			];
56
57			/**
58			* @var ReflectionClass
59			*/
60			protected $class;
61
62			/**
63			* @var string[]
64			*/
65			protected $columns;
66
67			/**
68			* @var DB
69			*/
70			protected $db;
71
72			/**
73			* @var array
74			*/
75			protected $defaults = [];
76
77			/**
78			* @var ReflectionProperty[]
79			*/
80			protected $properties = [];
81
82			/**
83			* @param DB $db
84			* @param string\|object $class
85			*/
86			public function __construct(DB $db, $class)
87			{
88			$this->db = $db;
89			$this->class = new ReflectionClass($class);
90			$this->defaults = $this->class->getDefaultProperties();
91			foreach ($this->class->getProperties() as $property) {
92			$name = $property->getName();
93			$property->setAccessible(true);
94			$this->properties[$name] = $property;
95			if ($this->isColumn($name)) {
96			$this->columns[$name] = $name;
97			}
98			}
99			}
100
101			/**
102			* @return string[]
103			*/
104			final public function getColumns(): array
105			{
106			return $this->columns;
107			}
108
109			/**
110			* @return EAV[]
111			*/
112			public function getEav()
113			{
114			$EAV = [];
115			foreach ($this->properties as $name => $prop) {
116			$doc = $prop->getDocComment();
117			if (preg_match(static::RX_EAV, $doc, $eav)) {
118			preg_match(static::RX_EAV_VAR, $doc, $var);
119			$type = $var['type'] ?? 'string';
120			$type = static::SCALARS[$type] ?? 'string';
121			$EAV[$name] = EAV::factory($this->db, $eav['table'], $type);
122			}
123			}
124			return $EAV;
125			}
126
127			/**
128			* Classes keyed by column.
129			*
130			* @return string[]
131			*/
132			public function getForeignClasses(): array
133			{
134			preg_match_all(static::RX_FOREIGN, $this->class->getDocComment(), $foreign, PREG_SET_ORDER);
135			return array_column($foreign, 'class', 'column');
136			}
137
138			/**
139			* @return string
140			*/
141			public function getJunctionTable(): string
142			{
143			preg_match(static::RX_JUNCTION, $this->class->getDocComment(), $junction);
144			return $junction['table'];
145			}
146
147			/**
148			* @return string
149			*/
150			public function getRecordTable(): string
151			{
152			preg_match(static::RX_RECORD, $this->class->getDocComment(), $record);
153			return $record['table'];
154			}
155
156			/**
157			* Scalar storage type, or FQN of a complex type.
158			*
159			* @param string $property
160			* @return string
161			*/
162			public function getType(string $property): string
163			{
164			return $this->getType_reflection($property)
165			?? $this->getType_var($property)
166			?? static::SCALARS[gettype($this->defaults[$property])];
167			}
168
169			/**
170			* @param string $property
171			* @return null\|string
172			*/
173			protected function getType_reflection(string $property): ?string
174			{
175			if ($type = $this->properties[$property]->getType() and $type instanceof ReflectionNamedType) {
176			return static::SCALARS[$type->getName()] ?? $type->getName();
177			}
178			return null;
179			}
180
181			/**
182			* @param string $property
183			* @return null\|string
184			*/
185			protected function getType_var(string $property): ?string
186			{
187			if (preg_match(static::RX_VAR, $this->properties[$property]->getDocComment(), $var)) {
188			$type = preg_replace(static::RX_NULL, '', $var['type']); // remove null
189			if (isset(static::SCALARS[$type])) {
190			return static::SCALARS[$type];
191			}
192			// it's beyond the scope of this class to parse "use" statements (for now),
193			// @var <CLASS> must be a FQN in order to work.
194			return ltrim($type, '\\');
195			}
196			return null;
197			}
198
199			/**
200			* Columns with their own individual unique constraints.
201			*
202			* @return string[]
203			*/
204			public function getUnique(): array
205			{
206			return array_filter($this->columns, fn(string $property) => $this->isUnique($property));
207			}
208
209			/**
210			* Table-level (multi-column) constraints are grouped under an arbitrary shared identifier.
211			*
212			* `[ shared identifier => [ col, ... ], ... ]`
213			*
214			* @return string[][]
215			*/
216			public function getUniqueGroups(): array
217			{
218			$groups = [];
219			foreach ($this->columns as $column) {
220			if ($this->isUniqueMulti($column, $ident)) {
221			$groups[$ident][$column] = $column;
222			}
223			}
224			return $groups;
225			}
226
227			/**
228			* Gets and returns a value through reflection.
229			*
230			* @param object $object
231			* @param string $property
232			* @return mixed
233			*/
234			public function getValue(object $object, string $property)
235			{
236			return $this->properties[$property]->getValue($object);
237			}
238
239			/**
240			* @param string $property
241			* @return bool
242			*/
243			public function isColumn(string $property): bool
244			{
245			return (bool)preg_match(static::RX_IS_COLUMN, $this->properties[$property]->getDocComment());
246			}
247
248			/**
249			* Whether a property allows `NULL` as a value.
250			*
251			* @param string $property
252			* @return bool
253			*/
254			public function isNullable(string $property): bool
255			{
256			if ($type = $this->properties[$property]->getType()) {
257			return $type->allowsNull();
258			}
259			if (preg_match(static::RX_VAR, $this->properties[$property]->getDocComment(), $var)) {
260			return (bool)preg_match(static::RX_NULL, $var['type']);
261			}
262			return $this->defaults[$property] === null;
263			}
264
265			/**
266			* @param string $column
267			* @return bool
268			*/
269			public function isUnique(string $column): bool
270			{
271			return (bool)preg_match(static::RX_UNIQUE, $this->properties[$column]->getDocComment());
272			}
273
274			/**
275			* @param string $column
276			* @param void $ident Updated to the group identifier.
277			* @return bool
278			*/
279			public function isUniqueMulti(string $column, &$ident = null): bool
280			{
281			if (preg_match(static::RX_UNIQUE_GROUP, $this->properties[$column]->getDocComment(), $unique)) {
282			$ident = $unique['ident'];
283			return true;
284			}
285			return false;
286			}
287
288			/**
289			* @return object
290			*/
291			public function newProto(): object
292			{
293			return $this->class->newInstanceWithoutConstructor();
294			}
295
296			/**
297			* Sets a value through reflection.
298			*
299			* @param object $object
300			* @param string $property
301			* @param mixed $value
302			*/
303			public function setValue(object $object, string $property, $value): void
304			{
305			$this->properties[$property]->setValue($object, $value);
306			}
307			}
308

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Reflection::getUniqueGroups() A

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