Parser::parseIdentifier() - Code Metrics - Inspection of "refactor test for parser and parser" - Youshido/GraphQL - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( e40fed...ed70fa )

by Portey

created 2015-12-04 18:08 UTC

Parser::parseIdentifier() A

↳ Parent: Parser

Complexity

Conditions	1
Paths	1

Size

Total Lines	9
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	7
CRAP Score	1

Importance

Changes	3
Bugs	0	Features	1

Metric	Value
c	3
b	0
f	1
dl	0
loc	9
ccs	7
cts	7
cp	1
rs	9.6667
cc	1
eloc	7
nc	1
nop	0
crap	1

<?php
/*
* This file is a part of graphql-youshido project.
*
* @author Portey Vasil <[email protected]>
* created: 11/23/15 1:22 AM
*/

namespace Youshido\GraphQL\Parser;

use Youshido\GraphQL\Parser\Value\InputList;
use Youshido\GraphQL\Parser\Ast\Argument;
use Youshido\GraphQL\Parser\Ast\Field;
use Youshido\GraphQL\Parser\Ast\Fragment;
use Youshido\GraphQL\Parser\Ast\FragmentReference;
use Youshido\GraphQL\Parser\Value\InputObject;
use Youshido\GraphQL\Parser\Value\Literal;
use Youshido\GraphQL\Parser\Ast\Mutation;
use Youshido\GraphQL\Parser\Ast\Query;
use Youshido\GraphQL\Parser\Value\Variable;

class Parser extends Tokenizer
{

    public function parse()
    {
        $data = ['queries' => [], 'mutations' => [], 'fragments' => []];

        while (!$this->end()) {
            $tokenType = $this->peek()->getType();

            switch ($tokenType) {
                case Token::TYPE_LBRACE:
                case Token::TYPE_QUERY:
                    $data = array_merge($data, ['queries' => $this->parseBody()]);
                    break;

                case Token::TYPE_MUTATION:
                    $data = array_merge($data, ['mutations' => $this->parseBody(Token::TYPE_MUTATION)]);
                    break;

                case Token::TYPE_FRAGMENT:
                    $data['fragments'][] = $this->parseFragment();
                    break;

                default:
                    throw new SyntaxErrorException();
            }
        }

        return $data;
    }

    protected function parseBody($token = Token::TYPE_QUERY, $highLevel = true)
    {
        $fields = [];
        $first  = true;

        if ($this->peek()->getType() == $token) {
            $this->lex();
        }

        $this->lex();

        while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
            if ($first) {
                $first = false;
            } else {
                $this->expect(Token::TYPE_COMMA);
            }

            if ($this->match(Token::TYPE_FRAGMENT_REFERENCE)) {
                $this->lex();

                $fields[] = $this->parseFragmentReference();
            } else {
                $fields[] = $this->parseBodyItem($token, $highLevel);
            }
        }

        $this->expect(Token::TYPE_RBRACE);

        return $fields;
    }

    protected function expect($type)
    {
        if ($this->match($type)) {
            return $this->lex();
        }

        throw $this->createUnexpected($this->peek());
    }

    protected function expectMulti($types)
    {
        if ($this->matchMulti($types)) {
            return $this->lex();
        }

        throw $this->createUnexpected($this->peek());
    }

    protected function parseReference()
    {
        $this->expectMulti([Token::TYPE_AMP, Token::TYPE_VARIABLE]);

        if ($this->match(Token::TYPE_NUMBER) || $this->match(Token::TYPE_IDENTIFIER)) {
            return new Variable($this->lex()->getData());
        }

        throw $this->createUnexpected($this->peek());
    }

    protected function parseFragmentReference()
    {
        $name = $this->parseIdentifier();

        return new FragmentReference($name);
    }

    protected function parseIdentifier()
    {
        return $this->expectMulti([
            Token::TYPE_IDENTIFIER,
            Token::TYPE_MUTATION,
            Token::TYPE_QUERY,
            Token::TYPE_FRAGMENT,
        ])->getData();
    }

    protected function parseBodyItem($type = Token::TYPE_QUERY, $highLevel = true)
    {
        $name  = $this->parseIdentifier();
        $alias = null;

        if ($this->eat(Token::TYPE_COLON)) {
            $alias = $name;
            $name  = $this->parseIdentifier();
        }

        $arguments = $this->match(Token::TYPE_LPAREN) ? $this->parseArgumentList() : [];

        if ($this->match(Token::TYPE_LBRACE)) {
            $fields = $this->parseBody($type, false);

            if ($type == Token::TYPE_QUERY) {
                return new Query($name, $alias, $arguments, $fields);
            } else {
                return new Mutation($name, $alias, $arguments, $fields);
            }
        } else {
            if ($highLevel && $type == Token::TYPE_MUTATION) {
                return new Mutation($name, $alias, $arguments);
            }

            return new Field($name, $alias);
        }
    }

    protected function parseArgumentList()
    {
        $args  = [];
        $first = true;

        $this->expect(Token::TYPE_LPAREN);

        while (!$this->match(Token::TYPE_RPAREN) && !$this->end()) {
            if ($first) {
                $first = false;
            } else {
                $this->expect(Token::TYPE_COMMA);
            }

            $args[] = $this->parseArgument();
        }

        $this->expect(Token::TYPE_RPAREN);

        return $args;
    }

    protected function parseArgument()
    {
        $name = $this->parseIdentifier();
        $this->expect(Token::TYPE_COLON);
        $value = $this->parseValue();

        return new Argument($name, $value);
    }

    protected function parseValue()
    {
        switch ($this->lookAhead->getType()) {
            case Token::TYPE_LSQUARE_BRACE:
                return $this->parseList();

            case Token::TYPE_LBRACE:
                return $this->parseObject();

            case Token::TYPE_AMP:
            case Token::TYPE_VARIABLE:
                return $this->parseReference();

            case Token::TYPE_LT:
                return $this->parseVariable();

            case Token::TYPE_NUMBER:
            case Token::TYPE_STRING:
                return new Literal($this->lex()->getData());

            case Token::TYPE_NULL:
            case Token::TYPE_TRUE:
            case Token::TYPE_FALSE:
                return new Literal($this->lex()->getData());
        }

        throw $this->createUnexpected($this->lookAhead);
    }

    protected function parseList($createType = true)
    {
        $this->eat(Token::TYPE_LSQUARE_BRACE);

        $list = [];
        while (!$this->match(Token::TYPE_RSQUARE_BRACE) && !$this->end()) {
            $list[] = $this->parseListValue();

            if ($this->lookAhead->getType() != Token::TYPE_RSQUARE_BRACE) {
                $this->expect(Token::TYPE_COMMA);
            }
        }

        $this->expect(Token::TYPE_RSQUARE_BRACE);

        return $createType ? new InputList($list) : $list;
    }

    protected function parseListValue()
    {
        switch ($this->lookAhead->getType()) {
            case Token::TYPE_NUMBER:
                return $this->expect(Token::TYPE_NUMBER)->getData();

            case Token::TYPE_STRING:
                return $this->expect(Token::TYPE_STRING)->getData();

            case Token::TYPE_LBRACE:
                return $this->parseObject(false);

            case Token::TYPE_LSQUARE_BRACE:
                return $this->parseList(false);

            case Token::TYPE_TRUE:
                return $this->expect(Token::TYPE_TRUE)->getData();

            case Token::TYPE_FALSE:
                return $this->expect(Token::TYPE_FALSE)->getData();

            case Token::TYPE_NULL:
                return $this->expect(Token::TYPE_NULL)->getData();
        }

        throw new SyntaxErrorException('Can\'t parse argument');
    }

    protected function parseObject($createType = true)
    {
        $this->eat(Token::TYPE_LBRACE);

        $object = [];
        while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
            $key = $this->expect(Token::TYPE_STRING)->getData();
            $this->expect(Token::TYPE_COLON);
            $value = $this->parseListValue();

            if ($this->peek()->getType() != Token::TYPE_RBRACE) {
                $this->expect(Token::TYPE_COMMA);
            }

            $object[$key] = $value;
        }

        $this->eat(Token::TYPE_RBRACE);

        return $createType ? new InputObject($object) : $object;
    }

    protected function parseVariable()
    {
        $this->expect(Token::TYPE_LT);
        $name = $this->expect(Token::TYPE_IDENTIFIER)->getData();
        $this->expect(Token::TYPE_GT);

        return new Variable($name);
    }

    protected function parseFragment()
    {
        $this->lex();
        $name = $this->parseIdentifier();

        $this->eat(Token::TYPE_ON);

        $model  = $this->parseIdentifier();
        $fields = $this->parseBody();

        return new Fragment($name, $model, $fields);
    }

    protected function eat($type)
    {
        if ($this->match($type)) {
            return $this->lex();
        }

        return null;
    }

    protected function matchMulti($types)
    {
        foreach ($types as $type) {
            if ($this->peek()->getType() == $type) {
                return true;
            }
        }

        return false;
    }

    protected function match($type)
    {
        return $this->peek()->getType() === $type;
    }
}

1		<?php
2		/*
3		* This file is a part of graphql-youshido project.
4		*
5		* @author Portey Vasil <[email protected]>
6		* created: 11/23/15 1:22 AM
7		*/
8
9		namespace Youshido\GraphQL\Parser;
10
11		use Youshido\GraphQL\Parser\Value\InputList;
12		use Youshido\GraphQL\Parser\Ast\Argument;
13		use Youshido\GraphQL\Parser\Ast\Field;
14		use Youshido\GraphQL\Parser\Ast\Fragment;
15		use Youshido\GraphQL\Parser\Ast\FragmentReference;
16		use Youshido\GraphQL\Parser\Value\InputObject;
17		use Youshido\GraphQL\Parser\Value\Literal;
18		use Youshido\GraphQL\Parser\Ast\Mutation;
19		use Youshido\GraphQL\Parser\Ast\Query;
20		use Youshido\GraphQL\Parser\Value\Variable;
21
22		class Parser extends Tokenizer
23		{
24
25	26	public function parse()
26		{
27	26	$data = ['queries' => [], 'mutations' => [], 'fragments' => []];
28
29	26	while (!$this->end()) {
30	26	$tokenType = $this->peek()->getType();
31
32		switch ($tokenType) {
33	26	case Token::TYPE_LBRACE:
34	26	case Token::TYPE_QUERY:
35	21	$data = array_merge($data, ['queries' => $this->parseBody()]);
36	15	break;
37
38	6	case Token::TYPE_MUTATION:
39	4	$data = array_merge($data, ['mutations' => $this->parseBody(Token::TYPE_MUTATION)]);
40	2	break;
41
42	2	case Token::TYPE_FRAGMENT:
43	1	$data['fragments'][] = $this->parseFragment();
44	1	break;
45
46	1	default:
47	1	throw new SyntaxErrorException();
48	1	}
49	17	}
50
51	17	return $data;
52		}
53
54	25	protected function parseBody($token = Token::TYPE_QUERY, $highLevel = true)
55		{
56	25	$fields = [];
57	25	$first = true;
58
59	25	if ($this->peek()->getType() == $token) {
60	4	$this->lex();
61	4	}
62
63	25	$this->lex();
64
65	25	while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
66	24	if ($first) {
67	24	$first = false;
68	24	} else {
69	8	$this->expect(Token::TYPE_COMMA);
70		}
71
72	24	if ($this->match(Token::TYPE_FRAGMENT_REFERENCE)) {
73	1	$this->lex();
74
75	1	$fields[] = $this->parseFragmentReference();
76	1	} else {
77	24	$fields[] = $this->parseBodyItem($token, $highLevel);
78		}
79	19	}
80
81	18	$this->expect(Token::TYPE_RBRACE);
82
83	18	return $fields;
84		}
85
86	25	protected function expect($type)
87		{
88	25	if ($this->match($type)) {
89	25	return $this->lex();
90		}
91
92	3	throw $this->createUnexpected($this->peek());
93		}
94
95	24	protected function expectMulti($types)
96		{
97	24	if ($this->matchMulti($types)) {
98	24	return $this->lex();
99		}
100
101	2	throw $this->createUnexpected($this->peek());
102		}
103
104	3	protected function parseReference()
105		{
106	3	$this->expectMulti([Token::TYPE_AMP, Token::TYPE_VARIABLE]);
107
108	3	if ($this->match(Token::TYPE_NUMBER) \|\| $this->match(Token::TYPE_IDENTIFIER)) {
109	2	return new Variable($this->lex()->getData());
110		}
111
112	1	throw $this->createUnexpected($this->peek());
113		}
114
115	1	protected function parseFragmentReference()
116		{
117	1	$name = $this->parseIdentifier();
118
119	1	return new FragmentReference($name);
120		}
121
122	24	protected function parseIdentifier()
123		{
124	24	return $this->expectMulti([
125	24	Token::TYPE_IDENTIFIER,
126	24	Token::TYPE_MUTATION,
127	24	Token::TYPE_QUERY,
128	24	Token::TYPE_FRAGMENT,
129	24	])->getData();
130		}
131
132	24	protected function parseBodyItem($type = Token::TYPE_QUERY, $highLevel = true)
133		{
134	24	$name = $this->parseIdentifier();
135	24	$alias = null;
136
137	24	if ($this->eat(Token::TYPE_COLON)) {
138	7	$alias = $name;
139	7	$name = $this->parseIdentifier();
140	7	}
141
142	24	$arguments = $this->match(Token::TYPE_LPAREN) ? $this->parseArgumentList() : [];
143
144	19	if ($this->match(Token::TYPE_LBRACE)) {
145	18	$fields = $this->parseBody($type, false);
146
147	16	if ($type == Token::TYPE_QUERY) {
148	15	return new Query($name, $alias, $arguments, $fields);
149		} else {
150	1	return new Mutation($name, $alias, $arguments, $fields);
151		}
152		} else {
153	19	if ($highLevel && $type == Token::TYPE_MUTATION) {
154	1	return new Mutation($name, $alias, $arguments);
155		}
156
157	18	return new Field($name, $alias);
158		}
159		}
160
161	15	protected function parseArgumentList()
162		{
163	15	$args = [];
164	15	$first = true;
165
166	15	$this->expect(Token::TYPE_LPAREN);
167
168	15	while (!$this->match(Token::TYPE_RPAREN) && !$this->end()) {
169	15	if ($first) {
170	15	$first = false;
171	15	} else {
172	3	$this->expect(Token::TYPE_COMMA);
173		}
174
175	15	$args[] = $this->parseArgument();
176	10	}
177
178	10	$this->expect(Token::TYPE_RPAREN);
179
180	10	return $args;
181		}
182
183	15	protected function parseArgument()
184		{
185	15	$name = $this->parseIdentifier();
186	15	$this->expect(Token::TYPE_COLON);
187	15	$value = $this->parseValue();
188
189	10	return new Argument($name, $value);
190		}
191
192	15	protected function parseValue()
193		{
194	15	switch ($this->lookAhead->getType()) {
195	15	case Token::TYPE_LSQUARE_BRACE:
196	3	return $this->parseList();
197
198	12	case Token::TYPE_LBRACE:
199	3	return $this->parseObject();
200
201	9	case Token::TYPE_AMP:
202	9	case Token::TYPE_VARIABLE:
203	3	return $this->parseReference();
204
205	7	case Token::TYPE_LT:
206	1	return $this->parseVariable();
207
208	6	case Token::TYPE_NUMBER:
209	6	case Token::TYPE_STRING:
210	5	return new Literal($this->lex()->getData());
211
212	2	case Token::TYPE_NULL:
213	2	case Token::TYPE_TRUE:
214	2	case Token::TYPE_FALSE:
215	1	return new Literal($this->lex()->getData());
216	1	}
217
218	1	throw $this->createUnexpected($this->lookAhead);
219		}
220
221	4	protected function parseList($createType = true)
222		{
223	4	$this->eat(Token::TYPE_LSQUARE_BRACE);
224
225	4	$list = [];
226	4	while (!$this->match(Token::TYPE_RSQUARE_BRACE) && !$this->end()) {
227	4	$list[] = $this->parseListValue();
228
229	3	if ($this->lookAhead->getType() != Token::TYPE_RSQUARE_BRACE) {
230	3	$this->expect(Token::TYPE_COMMA);
231	3	}
232	3	}
233
234	3	$this->expect(Token::TYPE_RSQUARE_BRACE);
235
236	3	return $createType ? new InputList($list) : $list;
237		}
238
239	6	protected function parseListValue()
240		{
241	6	switch ($this->lookAhead->getType()) {
242	6	case Token::TYPE_NUMBER:
243	5	return $this->expect(Token::TYPE_NUMBER)->getData();
244
245	4	case Token::TYPE_STRING:
246	2	return $this->expect(Token::TYPE_STRING)->getData();
247
248	4	case Token::TYPE_LBRACE:
249	1	return $this->parseObject(false);
250
251	4	case Token::TYPE_LSQUARE_BRACE:
252	1	return $this->parseList(false);
253
254	3	case Token::TYPE_TRUE:
255	1	return $this->expect(Token::TYPE_TRUE)->getData();
256
257	3	case Token::TYPE_FALSE:
258	1	return $this->expect(Token::TYPE_FALSE)->getData();
259
260	3	case Token::TYPE_NULL:
261	2	return $this->expect(Token::TYPE_NULL)->getData();
262	1	}
263
264	1	throw new SyntaxErrorException('Can\'t parse argument');
265		}
266
267	3	protected function parseObject($createType = true)
268		{
269	3	$this->eat(Token::TYPE_LBRACE);
270
271	3	$object = [];
272	3	while (!$this->match(Token::TYPE_RBRACE) && !$this->end()) {
273	3	$key = $this->expect(Token::TYPE_STRING)->getData();
274	3	$this->expect(Token::TYPE_COLON);
275	3	$value = $this->parseListValue();
276
277	3	if ($this->peek()->getType() != Token::TYPE_RBRACE) {
278	3	$this->expect(Token::TYPE_COMMA);
279	3	}
280
281	3	$object[$key] = $value;
282	3	}
283
284	1	$this->eat(Token::TYPE_RBRACE);
285
286	1	return $createType ? new InputObject($object) : $object;
287		}
288
289	1	protected function parseVariable()
290		{
291	1	$this->expect(Token::TYPE_LT);
292	1	$name = $this->expect(Token::TYPE_IDENTIFIER)->getData();
293	1	$this->expect(Token::TYPE_GT);
294
295	1	return new Variable($name);
296		}
297
298	1	protected function parseFragment()
299		{
300	1	$this->lex();
301	1	$name = $this->parseIdentifier();
302
303	1	$this->eat(Token::TYPE_ON);
304
305	1	$model = $this->parseIdentifier();
306	1	$fields = $this->parseBody();
307
308	1	return new Fragment($name, $model, $fields);
309		}
310
311	24	protected function eat($type)
312		{
313	24	if ($this->match($type)) {
314	11	return $this->lex();
315		}
316
317	23	return null;
318		}
319
320	24	protected function matchMulti($types)
321		{
322	24	foreach ($types as $type) {
323	24	if ($this->peek()->getType() == $type) {
324	24	return true;
325		}
326	6	}
327
328	2	return false;
329	1	}
330
331	25	protected function match($type)
332		{
333	25	return $this->peek()->getType() === $type;
334		}
335		}

Youshido / GraphQL

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Parser::parseIdentifier() A

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