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| 1 | <?php |
| 2 | namespace USDLRegex; |
| 3 | /** |
| 4 | * Validation class. |
| 5 | */ |
| 6 | class Validator { |
| 7 | /** |
| 8 | * Map of states and their rules |
| 9 | * @var array |
| 10 | */ |
| 11 | public $rules = array(); |
| 12 | /** |
| 13 | * Flag for adding verbosity to output |
| 14 | * @var boolean |
| 15 | */ |
| 16 | public $verbose = FALSE; |
| 17 | /** |
| 18 | * Flag for making regex comparisons case insensitive. e.g. the `i` flag |
| 19 | * @var boolean |
| 20 | */ |
| 21 | public $caseInsensitive = FALSE; |
| 22 | function __construct($options = array()) { |
| 23 | $defaults = array( |
| 24 | 'rules' => json_decode(file_get_contents(__DIR__.'/regex.json'), TRUE), |
| 25 | 'verbose' => FALSE, |
| 26 | 'caseInsensitive' => FALSE, |
| 27 | ); |
| 28 | $options = array_merge($defaults, $options); |
| 29 | $this->rules = $options['rules']; |
| 30 | $this->verbose = $options['verbose']; |
| 31 | $this->caseInsensitive = $options['caseInsensitive']; |
| 32 | } |
| 33 | /** |
| 34 | * Takes the passed state to lookup the regex rules, and tries to match |
| 35 | * in the provided string. |
| 36 | * |
| 37 | * @param String $state 2 letter abbreviation of the state |
| 38 | * @param String $dlString string representatino of the driver license number |
| 39 | * |
| 40 | * @return Bool TRUE/FALSE if the number is valid |
| 41 | */ |
| 42 | public function validate($state, $dlString) { |
| 43 | $rule = $this->__getRule($state); |
| 44 | $regexFlags = $this->__getValidatorFlags(); |
| 45 | if ($this->verbose === TRUE) { |
| 46 | echo "Validating $dlString using rule $rule\n"; |
| 47 | } |
| 48 | $isValid = (bool)preg_match("/$rule/$regexFlags", $dlString); |
| 49 | if ($isValid === FALSE && $this->verbose === TRUE) { |
| 50 | echo "Didn't match against the following criteria:\n"; |
| 51 | foreach ($this->__getDescriptions($state) as $description) { |
| 52 | echo " $description\n"; |
| 53 | } |
| 54 | } |
| 55 | return $isValid; |
| 56 | } |
| 57 | /** |
| 58 | * Finds and returns the registered state definition. |
| 59 | * |
| 60 | * @param String $key State to lookup rules for |
| 61 | * |
| 62 | * @return Array Array of Rule and Descriptions |
| 63 | * |
| 64 | * @throws USDLRegex\ValueException No State key was provided |
| 65 | * @throws USDLRegex\StateNotFoundException Passed state doesn't exist in key |
| 66 | */ |
| 67 | private function __getState($key=NULL) { |
| 68 | if ($key === NULL) { |
| 69 | throw new ValueException('Must provide a key to get a rule'); |
| 70 | } |
| 71 | $key = strtoupper($key); |
| 72 | if (!array_key_exists($key, $this->rules)) { |
| 73 | throw new StateNotFoundException("State '$key' not found in rule set"); |
| 74 | } |
| 75 | return $this->rules[$key]; |
| 76 | } |
| 77 | /** |
| 78 | * Finds and returns the validation rule for the state. |
| 79 | * |
| 80 | * @param String $key State to lookup rules for |
| 81 | * |
| 82 | * @return String String representation of regex |
| 83 | * |
| 84 | * @throws USDLRegex\RuleFormatException 'rule' key doesn't exist for the passed |
| 85 | * state. |
| 86 | */ |
| 87 | private function __getRule($key=NULL) { |
| 88 | $state = $this->__getState($key); |
| 89 | if (!array_key_exists('rule', $state)) { |
| 90 | throw new RuleFormatException("Malformed rules JSON: State '$key' does not have a 'rule' key."); |
| 91 | } |
| 92 | return $state['rule']; |
| 93 | } |
| 94 | /** |
| 95 | * Finds and returns the list of friendly descriptions for the state rule regex. |
| 96 | * |
| 97 | * @param String $key State to lookup rules for |
| 98 | * |
| 99 | * @return Array Array of strings with friendly regex rules |
| 100 | * |
| 101 | * @throws USDLRegex\RuleFormatException 'description' key doesn't exist for the |
| 102 | * passed state. |
| 103 | */ |
| 104 | private function __getDescriptions($key=NULL) { |
| 105 | $state = $this->__getState($key); |
| 106 | if (!array_key_exists('description', $state)) { |
| 107 | throw new RuleFormatException("Malformed rules JSON: State '$key' does not have a 'description' key."); |
| 108 | } |
| 109 | return $state['description']; |
| 110 | } |
| 111 | /** |
| 112 | * Compiles a list of regex directives to be used while validating. |
| 113 | * |
| 114 | * @return String string of regex directives |
| 115 | */ |
| 116 | private function __getValidatorFlags() { |
| 117 | $validatorFlags = ''; |
| 118 | if ($this->caseInsensitive === TRUE) { |
| 119 | $validatorFlags .= 'i'; |
| 120 | } |
| 121 | return $validatorFlags; |
| 122 | } |
| 123 | } |