Parser::parse() - Code Metrics - netdudes/DataSourceryBundle - Measure and Improve Code Quality continuously with Scrutinizer

Parser::parse() A
last analyzed 2017-06-12 15:46 UTC

↳ Parent: Parser

Complexity

Conditions	1
Paths	1

Size

Total Lines	7
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	7
c	0
b	0
f	0
rs	9.4285
cc	1
eloc	4
nc	1
nop	1

<?php

namespace Netdudes\DataSourceryBundle\UQL;

use Netdudes\DataSourceryBundle\UQL\AST\ASTArray;
use Netdudes\DataSourceryBundle\UQL\AST\ASTAssertion;
use Netdudes\DataSourceryBundle\UQL\AST\ASTFunctionCall;
use Netdudes\DataSourceryBundle\UQL\AST\ASTGroup;
use Netdudes\DataSourceryBundle\UQL\Exception\Semantic\UqlUnexpectedEndOfExpressionException;
use Netdudes\DataSourceryBundle\UQL\Exception\Semantic\UqlUnexpectedTokenException;
use Netdudes\DataSourceryBundle\UQL\Exception\UQLSyntaxError;

/**
 * Class Parser
 *
 * The parser translates a linear stream of tokens into a logical Abstract
 * Syntax Tree (AST) that represents the logical structure of the language
 * with independence of the actual end-objects (filters).
 *
 * @package Netdudes\NetdudesDataSourceryBundle\UQL
 */
class Parser
{
    /**
     *
     * Grammar (<identifier>s and <literal>s are simple scalars defined by regular expressions on the lexer):
     *
     * <operator>       ::=     "<" | ">" | "<=" | ">=" | "!=" | "<>" | "="
     * <logic>          ::=     "AND" | "OR"
     * <assertion>      ::=     <identifier> <operator> <literal>
     * <concatenation>  ::=     <statement> { <logic> <statement> }
     * <group>          ::=     "(" <concatenation> ")"
     * <statement>      ::=     <assertion> | <group>
     * <query>          ::=     <concatenation>
     *
     */

    private $tokenIndex;

    private $tokenStream = [];

    public function __construct()
    {
        $this->tokenIndex = -1;
    }

    /**
     * Lex, initialise and return the AST.
     *
     * @param $string
     *
     * @return bool|ASTAssertion|ASTGroup
     */
    public function parse($string)
    {
        $this->tokenStream = Lexer::lex($string);
        $this->tokenIndex = -1;

        return $this->getAST();
    }

    /**
     * Entry point of the grammar parsing.
     *
     * @return bool|ASTAssertion|ASTGroup
     */
    public function getAST()
    {
        // The top-level syntax is, in general, a concatenation of statements with logic connectors.
        $concatenation = $this->matchConcatenation();

        // Make sure we are at the end of the UQL
        $token = $this->nextToken();
        if ($token === false) {
            return $concatenation;
        }

        $this->throwUnexpectedTokenSyntaxError(['LOGIC'], "Logic operator or end of UQL expected after statement in first-level concatenation");
    }

    /**
     * Tries to match the following tokens to a <concatenation> grammar.
     *
     * @return bool|ASTAssertion|ASTGroup
     */
    public function matchConcatenation()
    {
        $elements = [];

        $firstStatement = $this->matchStatement();

        if ($firstStatement === false) {
            $this->throwUnexpectedTokenSyntaxError(['IDENTIFIER', 'GROUP_START'], 'Expected statement at beginning of concatenation.');
        }

        $elements[] = $firstStatement;

        $firstLogic = $this->matchLogic();
        if ($firstLogic === false) {
            // There is no actual concatenation. This is a single statement. Return as such.
            return $firstStatement;
        }
        $logic = $firstLogic;

        // While there are concatenating logic operators, keep adding elements.
        while ($logic !== false) {
            if ($logic['token'] != $firstLogic['token']) {
                $this->throwSyntaxError('Can\'t mix ORs and ANDs in same-level expression, ambiguous statement.');
            }
            $statement = $this->matchStatement();
            if ($statement === false) {
                $this->throwUnexpectedTokenSyntaxError(['IDENTIFIER', 'GROUP_START'], 'Expected statement after logic operator');
            }
            $elements[] = $statement;
            $logic = $this->matchLogic();
        }

        return new ASTGroup($firstLogic['token'], $elements);
    }

    /**
     * Tries to match a general <statement>, that is a <group> or <assertion>
     *
     * @return bool|ASTAssertion|ASTGroup
     */
    public function matchStatement()
    {
        // Try <group>
        $matchGroup = $this->matchGroup();

        if ($matchGroup !== false) {
            return $matchGroup;
        }

        // Try <assertion>
        $matchAssertion = $this->matchAssertion();

        if ($matchAssertion !== false) {
            return $matchAssertion;
        }

        // None found
        $this->rewindToken();

        return false;
    }

    /**
     * Tries to match a <group> grammar to the following tokens
     *
     * @return bool|ASTAssertion|ASTGroup
     */
    public function matchGroup()
    {
        $token = $this->nextToken();

        // Check for the open parenthesis
        if ($token['token'] != "T_BRACKET_OPEN") {
            $this->rewindToken();

            return false;
        }

        // The interior of a group is a <concatenation>
        $concatenation = $this->matchConcatenation();

        $token = $this->nextToken();

        // Check for closed parenthesis. Mismatch is a Syntax Error.
        if ($token['token'] != "T_BRACKET_CLOSE") {
            $this->throwUnexpectedTokenSyntaxError(['GROUP_END'], 'Expected closing bracket.');
        }

        return $concatenation;
    }

    /**
     * Tries to match the following tokens to an <assertion>.
     *
     * @throws Exception\UQLSyntaxError
     * @return bool|ASTAssertion
     */
    public function matchAssertion()
    {
        $identifier = $this->nextToken();

        if ($identifier['token'] != 'T_IDENTIFIER') {
            // If a stream doesn't start with an identifier, it's not an <assertion>.
            $this->rewindToken();

            return false;
        }

        $operator = $this->matchOperator();

        if ($operator === false) {
            $this->nextToken(); // MatchOperator rewinds
            $this->throwUnexpectedTokenSyntaxError(['OPERATOR'], 'Comparison operator expected after identifier');
        }

        $array = $this->matchArray();
        if ($array) {
            if (!in_array($operator['token'], ['T_OP_IN', 'T_OP_NIN'])) {
                throw new UQLSyntaxError("Arrays are only valid after IN or NOT IN operators");
            }

            return new ASTAssertion($identifier['match'], $operator['token'], $array);
        }

        $literal = $this->nextToken();

        if ($literal['token'] == 'T_FUNCTION_CALL') {
            return new ASTAssertion($identifier['match'], $operator['token'], ASTFunctionCall::createFromExpression($literal['match']));
        }

        if (strpos($literal['token'], 'T_LITERAL') !== 0) {
            $this->throwUnexpectedTokenSyntaxError(['ARRAY_START', 'LITERAL'], 'Array, value or function call expected after comparison operator');
        }
        $literal = $this->transformLiteral($literal);

        return new ASTAssertion($identifier['match'], $operator['token'], $literal['match']);
    }

    /**
     * Tries to match the next token to an <operator>.
     *
     * @return bool
     */
    public function matchOperator()
    {
        $operator = $this->nextToken();

        switch ($operator['token']) {
            case 'T_OP_NEQ':
            case 'T_OP_LTE':
            case 'T_OP_LT':
            case 'T_OP_GTE':
            case 'T_OP_GT':
            case 'T_OP_EQ':
            case 'T_OP_LIKE':
            case 'T_OP_IN':
            case 'T_OP_NIN':
                return $operator;
                break;
switch ($x) {
    case 1:
        return 'foo';
        break; // This break is not necessary and can be left off.
}
            default:
                $this->rewindToken();

                return false;
        }
    }

    public function matchArray()
    {
        $token = $this->nextToken();
        if ($token['token'] != "T_ARRAY_OPEN") {
            $this->rewindToken();

            return false;
        }

        $element = $this->nextToken();
        if ($element['token'] == "T_ARRAY_CLOSE") {
            // Empty array
            return new ASTArray();
        }

        $elements = [$element['match']];
        $comma = $this->nextToken();
        while ($comma['token'] == "T_ARRAY_SEPARATOR") {
            $element = $this->nextToken();
            if ($element['token'] !== 'T_LITERAL') {
                $this->throwUnexpectedTokenSyntaxError(['LITERAL'], "An array must consist of literals");
            }
            $elements[] = $element['match'];
            $comma = $this->nextToken();
        }
        if ($comma['token'] != 'T_ARRAY_CLOSE') {
            // Unterminated array
           $this->throwUnexpectedTokenSyntaxError(['ARRAY_END'], "An array must end with ']'.");
        }

        return new ASTArray($elements);
    }

    /**
     * Tries to match the next token to a <logic> operator
     *
     * @return bool
     */
    public function matchLogic()
    {
        $token = $this->nextToken();

        if ($token['token'] == 'T_LOGIC_AND' || $token['token'] == 'T_LOGIC_OR' || $token['token'] == 'T_LOGIC_XOR') {
            return $token;
        }

        // None found
        $this->rewindToken();

        return false;
    }

    /**
     * @return mixed
     */
    public function getTokenStream()
    {
        return $this->tokenStream;
    }

    /**
     * @param mixed $tokenStream
     */
    public function setTokenStream($tokenStream)
    {
        $this->tokenStream = $tokenStream;

    }

    /**
     * @return mixed
     */
    public function getTokenIndex()
    {
        return $this->tokenIndex;
    }

    /**
     * @param mixed $tokenIndex
     */
    public function setTokenIndex($tokenIndex)
    {
        $this->tokenIndex = $tokenIndex;
    }

    /**
     * Advance the token index and return.
     *
     * @return bool
     */
    private function nextToken()
    {
        $this->tokenIndex++;

        return $this->currentToken();
    }

    /**
     * Return the current token, without advancing the index.
     *
     * @return bool
     */
    private function currentToken()
    {
        return isset($this->tokenStream[$this->tokenIndex]) ? $this->tokenStream[$this->tokenIndex] : false;
    }

    /**
     * Move back the token index once.
     */
    private function rewindToken()
    {
        $this->tokenIndex--;
    }

    /**
     * Helper method. Throws an Exception representing a Syntax Error.
     *
     * @param $message
     *
     * @throws \Exception
     */
    private function throwUnexpectedTokenSyntaxError(array $expectedTokenCategories, $message = null)
    {
        $parsedTokenStream = array_slice($this->tokenStream, 0, $this->tokenIndex + 1);
        if ($this->currentToken() === false) {
            throw new UqlUnexpectedEndOfExpressionException(
                $expectedTokenCategories,
                $parsedTokenStream,
                $message);
        }
        throw new UqlUnexpectedTokenException(
            $this->currentToken()['token'],
            $this->currentToken()['match'],
            $expectedTokenCategories,
            $parsedTokenStream,
            $message
        );
    }

    private function throwSyntaxError($message)
    {
        throw new UQLSyntaxError('Syntax error: ' . $message);
    }

    /**
     * Transforms a literal subtype (e.g. T_LITERAL_FALSE) into a plain
     * literal match. Plain literals are unchanged.
     *
     * @param $literal
     *
     * @return array
     */
    private function transformLiteral($literal)
    {
        switch ($literal['token']) {
            case 'T_LITERAL_FALSE':
                $match = false;
                break;
            case 'T_LITERAL_TRUE':
                $match = true;
                break;
            case 'T_LITERAL_EMPTY':
                $match = null;
                break;
            default:
                $match = $literal['match'];
        }

        return [
            'token' => 'T_LITERAL',
            'match' => $match
        ];
    }
}


1			<?php
2
3			namespace Netdudes\DataSourceryBundle\UQL;
4
5			use Netdudes\DataSourceryBundle\UQL\AST\ASTArray;
6			use Netdudes\DataSourceryBundle\UQL\AST\ASTAssertion;
7			use Netdudes\DataSourceryBundle\UQL\AST\ASTFunctionCall;
8			use Netdudes\DataSourceryBundle\UQL\AST\ASTGroup;
9			use Netdudes\DataSourceryBundle\UQL\Exception\Semantic\UqlUnexpectedEndOfExpressionException;
10			use Netdudes\DataSourceryBundle\UQL\Exception\Semantic\UqlUnexpectedTokenException;
11			use Netdudes\DataSourceryBundle\UQL\Exception\UQLSyntaxError;
12
13			/**
14			* Class Parser
15			*
16			* The parser translates a linear stream of tokens into a logical Abstract
17			* Syntax Tree (AST) that represents the logical structure of the language
18			* with independence of the actual end-objects (filters).
19			*
20			* @package Netdudes\NetdudesDataSourceryBundle\UQL
21			*/
22			class Parser
23			{
24			/**
25			*
26			* Grammar (<identifier>s and <literal>s are simple scalars defined by regular expressions on the lexer):
27			*
28			* <operator> ::= "<" \| ">" \| "<=" \| ">=" \| "!=" \| "<>" \| "="
29			* <logic> ::= "AND" \| "OR"
30			* <assertion> ::= <identifier> <operator> <literal>
31			* <concatenation> ::= <statement> { <logic> <statement> }
32			* <group> ::= "(" <concatenation> ")"
33			* <statement> ::= <assertion> \| <group>
34			* <query> ::= <concatenation>
35			*
36			*/
37
38			private $tokenIndex;
39
40			private $tokenStream = [];
41
42			public function __construct()
43			{
44			$this->tokenIndex = -1;
45			}
46
47			/**
48			* Lex, initialise and return the AST.
49			*
50			* @param $string
51			*
52			* @return bool\|ASTAssertion\|ASTGroup
53			*/
54			public function parse($string)
55			{
56			$this->tokenStream = Lexer::lex($string);
57			$this->tokenIndex = -1;
58
59			return $this->getAST();
60			}
61
62			/**
63			* Entry point of the grammar parsing.
64			*
65			* @return bool\|ASTAssertion\|ASTGroup
66			*/
67			public function getAST()
68			{
69			// The top-level syntax is, in general, a concatenation of statements with logic connectors.
70			$concatenation = $this->matchConcatenation();
71
72			// Make sure we are at the end of the UQL
73			$token = $this->nextToken();
74			if ($token === false) {
75			return $concatenation;
76			}
77
78			$this->throwUnexpectedTokenSyntaxError(['LOGIC'], "Logic operator or end of UQL expected after statement in first-level concatenation");
79			}
80
81			/**
82			* Tries to match the following tokens to a <concatenation> grammar.
83			*
84			* @return bool\|ASTAssertion\|ASTGroup
85			*/
86			public function matchConcatenation()
87			{
88			$elements = [];
89
90			$firstStatement = $this->matchStatement();
91
92			if ($firstStatement === false) {
93			$this->throwUnexpectedTokenSyntaxError(['IDENTIFIER', 'GROUP_START'], 'Expected statement at beginning of concatenation.');
94			}
95
96			$elements[] = $firstStatement;
97
98			$firstLogic = $this->matchLogic();
99			if ($firstLogic === false) {
100			// There is no actual concatenation. This is a single statement. Return as such.
101			return $firstStatement;
102			}
103			$logic = $firstLogic;
104
105			// While there are concatenating logic operators, keep adding elements.
106			while ($logic !== false) {
107			if ($logic['token'] != $firstLogic['token']) {
108			$this->throwSyntaxError('Can\'t mix ORs and ANDs in same-level expression, ambiguous statement.');
109			}
110			$statement = $this->matchStatement();
111			if ($statement === false) {
112			$this->throwUnexpectedTokenSyntaxError(['IDENTIFIER', 'GROUP_START'], 'Expected statement after logic operator');
113			}
114			$elements[] = $statement;
115			$logic = $this->matchLogic();
116			}
117
118			return new ASTGroup($firstLogic['token'], $elements);
119			}
120
121			/**
122			* Tries to match a general <statement>, that is a <group> or <assertion>
123			*
124			* @return bool\|ASTAssertion\|ASTGroup
125			*/
126			public function matchStatement()
127			{
128			// Try <group>
129			$matchGroup = $this->matchGroup();
130
131			if ($matchGroup !== false) {
132			return $matchGroup;
133			}
134
135			// Try <assertion>
136			$matchAssertion = $this->matchAssertion();
137
138			if ($matchAssertion !== false) {
139			return $matchAssertion;
140			}
141
142			// None found
143			$this->rewindToken();
144
145			return false;
146			}
147
148			/**
149			* Tries to match a <group> grammar to the following tokens
150			*
151			* @return bool\|ASTAssertion\|ASTGroup
152			*/
153			public function matchGroup()
154			{
155			$token = $this->nextToken();
156
157			// Check for the open parenthesis
158			if ($token['token'] != "T_BRACKET_OPEN") {
159			$this->rewindToken();
160
161			return false;
162			}
163
164			// The interior of a group is a <concatenation>
165			$concatenation = $this->matchConcatenation();
166
167			$token = $this->nextToken();
168
169			// Check for closed parenthesis. Mismatch is a Syntax Error.
170			if ($token['token'] != "T_BRACKET_CLOSE") {
171			$this->throwUnexpectedTokenSyntaxError(['GROUP_END'], 'Expected closing bracket.');
172			}
173
174			return $concatenation;
175			}
176
177			/**
178			* Tries to match the following tokens to an <assertion>.
179			*
180			* @throws Exception\UQLSyntaxError
181			* @return bool\|ASTAssertion
182			*/
183			public function matchAssertion()
184			{
185			$identifier = $this->nextToken();
186
187			if ($identifier['token'] != 'T_IDENTIFIER') {
188			// If a stream doesn't start with an identifier, it's not an <assertion>.
189			$this->rewindToken();
190
191			return false;
192			}
193
194			$operator = $this->matchOperator();
195
196			if ($operator === false) {
197			$this->nextToken(); // MatchOperator rewinds
198			$this->throwUnexpectedTokenSyntaxError(['OPERATOR'], 'Comparison operator expected after identifier');
199			}
200
201			$array = $this->matchArray();
202			if ($array) {
203			if (!in_array($operator['token'], ['T_OP_IN', 'T_OP_NIN'])) {
204			throw new UQLSyntaxError("Arrays are only valid after IN or NOT IN operators");
205			}
206
207			return new ASTAssertion($identifier['match'], $operator['token'], $array);
208			}
209
210			$literal = $this->nextToken();
211
212			if ($literal['token'] == 'T_FUNCTION_CALL') {
213			return new ASTAssertion($identifier['match'], $operator['token'], ASTFunctionCall::createFromExpression($literal['match']));
214			}
215
216			if (strpos($literal['token'], 'T_LITERAL') !== 0) {
217			$this->throwUnexpectedTokenSyntaxError(['ARRAY_START', 'LITERAL'], 'Array, value or function call expected after comparison operator');
218			}
219			$literal = $this->transformLiteral($literal);
220
221			return new ASTAssertion($identifier['match'], $operator['token'], $literal['match']);
222			}
223
224			/**
225			* Tries to match the next token to an <operator>.
226			*
227			* @return bool
228			*/
229			public function matchOperator()
230			{
231			$operator = $this->nextToken();
232
233			switch ($operator['token']) {
234			case 'T_OP_NEQ':
235			case 'T_OP_LTE':
236			case 'T_OP_LT':
237			case 'T_OP_GTE':
238			case 'T_OP_GT':
239			case 'T_OP_EQ':
240			case 'T_OP_LIKE':
241			case 'T_OP_IN':
242			case 'T_OP_NIN':
243			return $operator;
244			break;
			0 ignored issues – show Unused Code introduced 2015-12-10 11:44 UTC by Report Bug Copy Issue Report `break` is not strictly necessary here and could be removed. The `break` statement is not necessary if it is preceded for example by a `return` statement: switch ($x) { case 1: return 'foo'; break; // This break is not necessary and can be left off. } If you would like to keep this construct to be consistent with other `case` statements, you can safely mark this issue as a false-positive. Loading history...
245			default:
246			$this->rewindToken();
247
248			return false;
249			}
250			}
251
252			public function matchArray()
253			{
254			$token = $this->nextToken();
255			if ($token['token'] != "T_ARRAY_OPEN") {
256			$this->rewindToken();
257
258			return false;
259			}
260
261			$element = $this->nextToken();
262			if ($element['token'] == "T_ARRAY_CLOSE") {
263			// Empty array
264			return new ASTArray();
265			}
266
267			$elements = [$element['match']];
268			$comma = $this->nextToken();
269			while ($comma['token'] == "T_ARRAY_SEPARATOR") {
270			$element = $this->nextToken();
271			if ($element['token'] !== 'T_LITERAL') {
272			$this->throwUnexpectedTokenSyntaxError(['LITERAL'], "An array must consist of literals");
273			}
274			$elements[] = $element['match'];
275			$comma = $this->nextToken();
276			}
277			if ($comma['token'] != 'T_ARRAY_CLOSE') {
278			// Unterminated array
279			$this->throwUnexpectedTokenSyntaxError(['ARRAY_END'], "An array must end with ']'.");
280			}
281
282			return new ASTArray($elements);
283			}
284
285			/**
286			* Tries to match the next token to a <logic> operator
287			*
288			* @return bool
289			*/
290			public function matchLogic()
291			{
292			$token = $this->nextToken();
293
294			if ($token['token'] == 'T_LOGIC_AND' \|\| $token['token'] == 'T_LOGIC_OR' \|\| $token['token'] == 'T_LOGIC_XOR') {
295			return $token;
296			}
297
298			// None found
299			$this->rewindToken();
300
301			return false;
302			}
303
304			/**
305			* @return mixed
306			*/
307			public function getTokenStream()
308			{
309			return $this->tokenStream;
310			}
311
312			/**
313			* @param mixed $tokenStream
314			*/
315			public function setTokenStream($tokenStream)
316			{
317			$this->tokenStream = $tokenStream;
			0 ignored issues – show Documentation Bug introduced 2015-12-10 11:44 UTC by Report Bug Copy Issue Report It seems like `$tokenStream` of type `*` is incompatible with the declared type `array` of property `$tokenStream`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
318			}
319
320			/**
321			* @return mixed
322			*/
323			public function getTokenIndex()
324			{
325			return $this->tokenIndex;
326			}
327
328			/**
329			* @param mixed $tokenIndex
330			*/
331			public function setTokenIndex($tokenIndex)
332			{
333			$this->tokenIndex = $tokenIndex;
334			}
335
336			/**
337			* Advance the token index and return.
338			*
339			* @return bool
340			*/
341			private function nextToken()
342			{
343			$this->tokenIndex++;
344
345			return $this->currentToken();
346			}
347
348			/**
349			* Return the current token, without advancing the index.
350			*
351			* @return bool
352			*/
353			private function currentToken()
354			{
355			return isset($this->tokenStream[$this->tokenIndex]) ? $this->tokenStream[$this->tokenIndex] : false;
356			}
357
358			/**
359			* Move back the token index once.
360			*/
361			private function rewindToken()
362			{
363			$this->tokenIndex--;
364			}
365
366			/**
367			* Helper method. Throws an Exception representing a Syntax Error.
368			*
369			* @param $message
370			*
371			* @throws \Exception
372			*/
373			private function throwUnexpectedTokenSyntaxError(array $expectedTokenCategories, $message = null)
374			{
375			$parsedTokenStream = array_slice($this->tokenStream, 0, $this->tokenIndex + 1);
376			if ($this->currentToken() === false) {
377			throw new UqlUnexpectedEndOfExpressionException(
378			$expectedTokenCategories,
379			$parsedTokenStream,
380			$message);
381			}
382			throw new UqlUnexpectedTokenException(
383			$this->currentToken()['token'],
384			$this->currentToken()['match'],
385			$expectedTokenCategories,
386			$parsedTokenStream,
387			$message
388			);
389			}
390
391			private function throwSyntaxError($message)
392			{
393			throw new UQLSyntaxError('Syntax error: ' . $message);
394			}
395
396			/**
397			* Transforms a literal subtype (e.g. T_LITERAL_FALSE) into a plain
398			* literal match. Plain literals are unchanged.
399			*
400			* @param $literal
401			*
402			* @return array
403			*/
404			private function transformLiteral($literal)
405			{
406			switch ($literal['token']) {
407			case 'T_LITERAL_FALSE':
408			$match = false;
409			break;
410			case 'T_LITERAL_TRUE':
411			$match = true;
412			break;
413			case 'T_LITERAL_EMPTY':
414			$match = null;
415			break;
416			default:
417			$match = $literal['match'];
418			}
419
420			return [
421			'token' => 'T_LITERAL',
422			'match' => $match
423			];
424			}
425			}
426

netdudes / DataSourceryBundle

Parser::parse() A last analyzed 2017-06-12 15:46 UTC

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Parser::parse() A
last analyzed 2017-06-12 15:46 UTC