├── CHANGES.md
├── README.md
└── gravityforms-regex-validation.php


/CHANGES.md:
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1 | ### 1.0.1 / 2017-04-19
2 | * Update readme.
3 | 
4 | ### 1.0 / 2017-04-19
5 | * Initial release
6 | 


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/README.md:
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 1 | # gravityforms-regex-validation
 2 | A WordPress plugin that adds regular expression validation options to Gravity Forms' single line text input.
 3 | 
 4 | Use regular expressions to validate data entered in the single line text input type.
 5 | 
 6 | ## Usage
 7 | 
 8 | 1. Add your single line text input.
 9 | 2. On the Advanced field settings tab, check "Use Regular Expression Validation"
10 | 3. Enter your RegEx pattern in the "RegEx Pattern" field.
11 | 4. Optionally, enter a custom validation message.
12 | 
13 | ### Example
14 | 
15 | * RegEx Pattern: ^1[0-9]{1}$
16 | * Validation Message: Please enter a number between 10-19 (inclusive).
17 | 
18 | ## Installation
19 | Just download the ZIP for the latest release from this repository and install as normal via WordPress.
20 | 
21 | Note: this plugin optionally can be updated using the [Github Updater plugin](https://github.com/afragen/github-updater).
22 | 


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/gravityforms-regex-validation.php:
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  1 | <?php
  2 | /*
  3 | Plugin Name: Gravity Forms Regular Expression Validation
  4 | Plugin URI: https://github.com/mmirus/gravityforms-regex-validation
  5 | Description: Add regular expression validation option to Gravity Forms single text input
  6 | Author: Matt Mirus
  7 | Author URI: https://github.com/mmirus
  8 | Version: 1.0.1
  9 | GitHub Plugin URI: https://github.com/mmirus/gravityforms-regex-validation
 10 | */
 11 | 
 12 | namespace GF_RegEx;
 13 | 
 14 | class GF_RegEx {
 15 |   function __construct() {
 16 |     // add field
 17 |     add_action('gform_field_advanced_settings', array($this, 'settings_fields'), 10, 2);
 18 |     
 19 |     // add script
 20 |     add_action('gform_editor_js', array($this, 'editor_script'));
 21 |     
 22 |     // add validation
 23 |     add_filter('gform_field_validation', array($this, 'validate'), 10, 4);
 24 |   }
 25 |   
 26 |   // add regex validation setting fields
 27 |   public function settings_fields($position, $form_id) {
 28 |     //create settings on position 375 (right after "enable password input")
 29 |     if ( $position == 375 ) {
 30 |       ?>
 31 |       <li class="regex_setting field_setting">
 32 |         <input type="checkbox" id="field_regex_validation" onclick="SetFieldProperty('regexValidation', this.checked); ToggleInputRegEx()" onkeypress="SetFieldProperty('regexValidation', this.checked); ToggleInputRegEx()" />
 33 |         <label for="field_regex_validation" class="inline">
 34 |           <?php _e("Use Regular Expression Validation", "gf_regex"); ?>
 35 |         </label>
 36 |         
 37 |         <div id="field_regex_pattern_container" style="padding-top: 10px; display: block;">
 38 |           <p>
 39 |             <label for="field_regex_pattern" class="inline">RegEx Pattern:&nbsp;</label>
 40 |             <input type="text" id="field_regex_pattern" onchange="SetFieldProperty('regexPattern', this.value)" class="fieldwidth-2" placeholder="">
 41 |           </p>
 42 |           <p>
 43 |             <label for="field_regex_message" class="inline">Validation Message:&nbsp;</label>
 44 |             <input type="text" id="field_regex_message" onchange="SetFieldProperty('regexMessage', this.value)" class="fieldwidth-2" placeholder="The value provided is not valid for this field.">
 45 |           </p>
 46 |         </div>
 47 |       </li>
 48 |       <?php
 49 |     }
 50 |   }
 51 |   
 52 |   // Action to inject supporting script to the form editor page
 53 |   public function editor_script() {
 54 |     ?>
 55 |     <script type='text/javascript'>
 56 |       // adding setting to fields of type "text"
 57 |       fieldSettings.text += ", .regex_setting";
 58 | 
 59 |       // binding to the load field settings event to initialize the checkbox
 60 |       jQuery(document).bind("gform_load_field_settings", function(event, field, form) {
 61 |         jQuery("#field_regex_validation").attr("checked", field["regexValidation"] == true);
 62 |         jQuery("#field_regex_pattern").val(field["regexPattern"]);
 63 |         jQuery("#field_regex_message").val(field["regexMessage"]);
 64 |         
 65 |         ToggleInputRegEx(true);
 66 |       });
 67 |       
 68 |       // show / hide regex pattern input field
 69 |       function ToggleInputRegEx(isInit){
 70 |         var speed = isInit ? "" : "slow";
 71 |         if(jQuery('#field_regex_validation').is(":checked")){
 72 |           jQuery('#field_regex_pattern_container').show(speed);
 73 |         }
 74 |         else{
 75 |           jQuery('#field_regex_pattern_container').hide(speed);
 76 |         }
 77 |       }
 78 |     </script>
 79 |     <?php
 80 |   }
 81 | 
 82 |   // validate submitted data against provided regex
 83 |   public function validate($result, $value, $form, $field) {
 84 |     // if validation has passed so far, and regex validation is enabled, and a pattern was provided, and a value was provided
 85 |     if ($result['is_valid'] && $field['regexValidation'] && !empty($field['regexPattern']) && !empty($value)) {
 86 |       $regex = '/' . $field['regexPattern'] . '/';
 87 |       if (preg_match($regex, $value) !== 1) {
 88 |         $result['is_valid'] = false;
 89 |         
 90 |         // use custom regex validation message if provided
 91 |         $result['message'] = 'The value provided is not valid for this field.';
 92 |         if (!empty($field['regexMessage'])) {
 93 |           $result['message'] = $field['regexMessage'];
 94 |         }
 95 |       }
 96 |     }
 97 |     
 98 |     return $result;
 99 |   }
100 | }
101 | 
102 | new GF_Regex();
103 | 


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