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<?php namespace CMPayments\JsonLint; |
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use CMPayments\JsonLint\Exceptions\JsonLintException; |
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use CMPayments\JsonLint\Exceptions\UndefinedException; |
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/** |
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* Class Lexer |
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* |
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* @package CMPayments\JsonLint |
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*/ |
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class Lexer |
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{ |
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/** |
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* @var int |
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*/ |
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private $EOF = 1; |
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/** |
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* @var array |
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*/ |
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private $rules = [ |
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0 => '/^\s+/', |
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1 => '/^-?([0-9]|[1-9][0-9]+)(\.[0-9]+)?([eE][+-]?[0-9]+)?\b/', |
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2 => '{^"(?:\\\\["bfnrt/\\\\]|\\\\u[a-fA-F0-9]{4}|[^\0-\x09\x0a-\x1f\\\\"]+)*"}', |
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3 => '/^\{/', |
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4 => '/^\}/', |
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5 => '/^\[/', |
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6 => '/^\]/', |
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7 => '/^,/', |
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8 => '/^:/', |
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9 => '/^true\b/', |
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10 => '/^false\b/', |
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11 => '/^null\b/', |
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12 => '/^$/', |
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13 => '/^./', |
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]; |
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/** |
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* @var array |
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*/ |
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private $conditions = ["INITIAL" => ["rules" => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13], "inclusive" => true]]; |
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/** |
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* @var |
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*/ |
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private $conditionStack; |
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/** |
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* @var |
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*/ |
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private $input; |
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/** |
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* @var |
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*/ |
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private $done; |
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/** |
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* @var |
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*/ |
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private $matched; |
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/** |
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* @var |
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*/ |
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public $match; |
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/** |
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* @var |
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*/ |
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public $yLineNo; |
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/** |
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* @var |
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*/ |
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public $yColumnNo; |
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/** |
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* @var |
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*/ |
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public $yLength; |
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/** |
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* @var |
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*/ |
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public $yText; |
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/** |
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* @var |
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*/ |
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public $yLocation; |
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/** |
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* @return UndefinedException|int|null|string |
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*/ |
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public function lex() |
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{ |
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$r = $this->next(); |
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if (!$r instanceof UndefinedException) { |
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return $r; |
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} |
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return $this->lex(); |
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} |
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/** |
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* @param string $input |
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* |
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* @return $this |
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*/ |
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public function setInput($input) |
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{ |
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$this->input = $input; |
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$this->done = false; |
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$this->yLineNo = $this->yLength = $this->yColumnNo = 0; |
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$this->yText = $this->matched = $this->match = ''; |
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$this->conditionStack = ['INITIAL']; |
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$this->yLocation = ['last_line' => 1, 'last_column' => 0]; |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function getPastInput() |
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{ |
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$past = substr($this->matched, 0, (strlen($this->matched) - strlen($this->yText))); |
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return (strlen($past) > 20 ? '...' : '') . substr($past, -20); |
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} |
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/** |
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* @return string |
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*/ |
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public function getUpcomingInput() |
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{ |
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$next = $this->yText; |
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if (strlen($next) < 20) { |
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$next .= substr($this->input, 0, 20 - strlen($next)); |
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} |
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return substr($next, 0, 20) . (strlen($next) > 20 ? '...' : ''); |
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} |
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/** |
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* @return UndefinedException|int|null|string |
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* @throws \Exception |
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*/ |
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private function next() |
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{ |
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if ($this->done) { |
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return $this->EOF; |
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} |
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if (!$this->input) { |
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$this->done = true; |
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} |
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$match = $lines = null; |
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$this->yText = $this->match = ''; |
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$rules = $this->getCurrentRules(); |
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$rulesLen = count($rules); |
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for ($i = 0; $i < $rulesLen; $i++) { |
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if (preg_match($this->rules[$rules[$i]], $this->input, $match)) { |
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preg_match_all('/\n.*/', $match[0], $lines); |
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$lines = $lines[0]; |
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if ($lines) { |
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$this->yLineNo += count($lines); |
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} |
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$this->yLocation = [ |
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'last_line' => $this->yLineNo + 1, |
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'last_column' => $lines ? strlen($lines[count($lines) - 1]) - 1 : $this->yLocation['last_column'] + strlen($match[0]), |
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]; |
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preg_match("/^[\"|']?(?P<match>.*?)(?:[\"|'](.*)$|$)/", explode("\n", $this->input)[0], $inputMatches); |
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$this->yText .= $match[0]; |
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$this->match .= (isset($inputMatches['match']) ? $inputMatches['match'] : $match[0]); |
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$this->yLength = strlen($this->yText); |
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$this->yColumnNo = $this->yLocation['last_column']; |
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$this->input = substr($this->input, strlen($this->yText)); |
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$this->matched .= $this->yText; |
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$token = $this->performAction($rules[$i]); |
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if ($token) { |
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return $token; |
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} |
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return new UndefinedException(UndefinedException::ERROR_UNDEFINED_VALIDATION); |
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} |
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} |
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if ($this->input === '') { |
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return $this->EOF; |
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} |
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throw new JsonLintException(JsonLintException::ERROR_LEXICAL_ERROR, [($this->yLineNo + 1)]); |
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} |
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/** |
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* @return mixed |
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*/ |
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private function getCurrentRules() |
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{ |
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return $this->conditions[$this->conditionStack[count($this->conditionStack) - 1]]['rules']; |
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} |
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/** |
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* @param $avoiding_name_collisions |
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* |
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* @return int|string |
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*/ |
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private function performAction($avoiding_name_collisions) |
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{ |
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switch ($avoiding_name_collisions) { |
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case 0:/* skip whitespace */ |
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return null; |
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case 1: |
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return 6; |
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case 2: |
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$this->yText = substr($this->yText, 1, $this->yLength - 2); |
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return 4; |
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case 3: |
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return 17; |
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case 4: |
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return 18; |
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case 5: |
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return 23; |
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case 6: |
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return 24; |
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case 7: |
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return 22; |
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case 8: |
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return 21; |
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case 9: |
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return 10; |
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case 10: |
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return 11; |
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case 11: |
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return 8; |
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case 12: |
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return 14; |
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case 13: |
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return 'INVALID'; |
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default: |
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return null; |
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} |
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} |
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} |
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cmpayments /
jsonlint
