project done before

www/assets/vendor/php-email-form/changelog.txt

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+Version: 2.0
+  - The minimum required PHP version is 5.5
+  - Improved error handling and debugging
+  - Added support for cc and bcc
+  - Added "honeypot" spam protection feature
+  - Added support for Google reCaptcha spam protection
+  
+Version: 1.0
+  - Initial Release
+  

www/assets/vendor/php-email-form/validate.js

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+/**
+* PHP Email Form Validation - v2.0
+* URL: https://bootstrapmade.com/php-email-form/
+* Author: BootstrapMade.com
+*/
+!(function($) {
+  "use strict";
+
+  $('form.php-email-form').submit(function(e) {
+    e.preventDefault();
+    
+    var f = $(this).find('.form-group'),
+      ferror = false,
+      emailExp = /^[^\s()<>@,;:\/]+@\w[\w\.-]+\.[a-z]{2,}$/i;
+
+    f.children('input').each(function() { // run all inputs
+     
+      var i = $(this); // current input
+      var rule = i.attr('data-rule');
+
+      if (rule !== undefined) {
+        var ierror = false; // error flag for current input
+        var pos = rule.indexOf(':', 0);
+        if (pos >= 0) {
+          var exp = rule.substr(pos + 1, rule.length);
+          rule = rule.substr(0, pos);
+        } else {
+          rule = rule.substr(pos + 1, rule.length);
+        }
+
+        switch (rule) {
+          case 'required':
+            if (i.val() === '') {
+              ferror = ierror = true;
+            }
+            break;
+
+          case 'minlen':
+            if (i.val().length < parseInt(exp)) {
+              ferror = ierror = true;
+            }
+            break;
+
+          case 'email':
+            if (!emailExp.test(i.val())) {
+              ferror = ierror = true;
+            }
+            break;
+
+          case 'checked':
+            if (! i.is(':checked')) {
+              ferror = ierror = true;
+            }
+            break;
+
+          case 'regexp':
+            exp = new RegExp(exp);
+            if (!exp.test(i.val())) {
+              ferror = ierror = true;
+            }
+            break;
+        }
+        i.next('.validate').html((ierror ? (i.attr('data-msg') !== undefined ? i.attr('data-msg') : 'wrong Input') : '')).show('blind');
+      }
+    });
+    f.children('textarea').each(function() { // run all inputs
+
+      var i = $(this); // current input
+      var rule = i.attr('data-rule');
+
+      if (rule !== undefined) {
+        var ierror = false; // error flag for current input
+        var pos = rule.indexOf(':', 0);
+        if (pos >= 0) {
+          var exp = rule.substr(pos + 1, rule.length);
+          rule = rule.substr(0, pos);
+        } else {
+          rule = rule.substr(pos + 1, rule.length);
+        }
+
+        switch (rule) {
+          case 'required':
+            if (i.val() === '') {
+              ferror = ierror = true;
+            }
+            break;
+
+          case 'minlen':
+            if (i.val().length < parseInt(exp)) {
+              ferror = ierror = true;
+            }
+            break;
+        }
+        i.next('.validate').html((ierror ? (i.attr('data-msg') != undefined ? i.attr('data-msg') : 'wrong Input') : '')).show('blind');
+      }
+    });
+    if (ferror) return false;
+
+    var this_form = $(this);
+    var action = $(this).attr('action');
+
+    if( ! action ) {
+      this_form.find('.loading').slideUp();
+      this_form.find('.error-message').slideDown().html('The form action property is not set!');
+      return false;
+    }
+    
+    this_form.find('.sent-message').slideUp();
+    this_form.find('.error-message').slideUp();
+    this_form.find('.loading').slideDown();
+
+    if ( $(this).data('recaptcha-site-key') ) {
+      var recaptcha_site_key = $(this).data('recaptcha-site-key');
+      grecaptcha.ready(function() {
+        grecaptcha.execute(recaptcha_site_key, {action: 'php_email_form_submit'}).then(function(token) {
+          php_email_form_submit(this_form,action,this_form.serialize() + '&recaptcha-response=' + token);
+        });
+      });
+    } else {
+      php_email_form_submit(this_form,action,this_form.serialize());
+    }
+    
+    return true;
+  });
+
+  function php_email_form_submit(this_form, action, data) {
+    $.ajax({
+      type: "POST",
+      url: action,
+      data: data,
+      timeout: 40000
+    }).done( function(msg){
+      if (msg == 'OK') {
+        this_form.find('.loading').slideUp();
+        this_form.find('.sent-message').slideDown();
+        this_form.find("input:not(input[type=submit]), textarea").val('');
+      } else {
+        this_form.find('.loading').slideUp();
+        if(!msg) {
+          msg = 'Form submission failed and no error message returned from: ' + action + '<br>';
+        }
+        this_form.find('.error-message').slideDown().html(msg);
+      }
+    }).fail( function(data){
+      console.log(data);
+      var error_msg = "Form submission failed!<br>";
+      if(data.statusText || data.status) {
+        error_msg += 'Status:';
+        if(data.statusText) {
+          error_msg += ' ' + data.statusText;
+        }
+        if(data.status) {
+          error_msg += ' ' + data.status;
+        }
+        error_msg += '<br>';
+      }
+      if(data.responseText) {
+        error_msg += data.responseText;
+      }
+      this_form.find('.loading').slideUp();
+      this_form.find('.error-message').slideDown().html(error_msg);
+    });
+  }
+
+})(jQuery);