- Added AJAX call for clear data

- New file pdf-generator-ajax-script.js added
- Registered and Enqueued Script
- Moved Flush button out of the form
- Updated cleardata() function for ajax call

functions.php

@@ -91,6 +91,9 @@ function generate_certificate($cert_data,$input_data){
       $pdf->SetFont('Helvetica', '', $general_font_size);
       // Event Date
       $pdf->Cell(0, 8, $value[2], 0, 2, 'C', 0, '', 0);
+      if (!file_exists($path.'/certificate/')) {
+        mkdir($path.'/certificate/', 0777, true);
+      }
       $pdf_file_path = $path.'/certificate/'.$value[0].'-'.date('ymdHis').'.pdf';
       $pdf_file_name = basename($pdf_file_path);
       $pdf->Output($pdf_file_path,'F');
@@ -106,7 +109,6 @@ function generate_certificate($cert_data,$input_data){
           $input_data['email_body'] = str_replace("{{variable2}}", $value[1], $input_data['email_body']);
           $input_data['email_body'] = str_replace("{{variable3}}", $value[2], $input_data['email_body']);
           $msg = htmlspecialchars_decode($input_data['email_body']);
-          // print_r($input_data['email_body']);
         }
         else{
           // Default MSG        
@@ -154,25 +156,25 @@ function send_mail($to,$sub,$msg,$headers,$attachment){
   return wp_mail($to,$sub,$msg,$headers,$attachment);
 }
 
-// Clear Data
+// Clear Data function. This will be called via AJAX call
 function cleardata(){
-  echo "Clearing Data<br>";
+  echo "Clearing Data of certificates and generated PDFs";
   $path = dirname(__FILE__);
   // Clearing Certificate data
-  echo "Clearing Cert<br>";
   $files = glob($path.'/data/*'); // get all file names
   foreach($files as $file){ // iterate files
     if(is_file($file)) {
       unlink($file); // delete file
     }
   }
   // Clearing PDFs
-  echo "Clearing PDFs<br>";
   $files = glob($path.'/certificate/*'); // get all file names
   foreach($files as $file){ // iterate files
     if(is_file($file)) {
       unlink($file); // delete file
     }
   }
+  wp_die();
 }
-// add_action('clear_all_data','read_data','',2);
+add_action('wp_ajax_cleardata', 'cleardata');
+add_action('wp_ajax_nopriv_cleardata', 'cleardata');

generate.php

@@ -2,7 +2,7 @@
 
 $content = '
 <style>
-.upload-wrapper,.delete_data{margin-bottom:10px;}
+.upload-wrapper,#delete_data_btn{margin-bottom:10px;}
 fieldset{
     display: block;
     margin-inline-start: 2px;
@@ -32,8 +32,8 @@
 }
 </style>
 <h1>Generate PDF</h1>
+<button name="clearData" id="delete_data_btn">Flush the PDF Generator\'s Cache</button>
 <form method="POST" action="" enctype="multipart/form-data">
-    <button type="submit" name="clearData" value="Delete" class="delete_data">Flush the PDF Generator\'s Cache</button>
     <p>Required fields are followed by <strong><abbr title="required">*</abbr></strong></p>
     <fieldset>
         <legend>Sender\'s Configurations</legend>
@@ -97,6 +97,9 @@
         $allowedfileExtensions = array('csv');
         if (in_array($fileExtension, $allowedfileExtensions)) {
             // directory in which the uploaded file will be moved
+            if (!file_exists(plugin_dir_path(__FILE__).'data/')) {
+                mkdir(plugin_dir_path(__FILE__).'data/', 0777, true);
+            }
             $uploadFileDir = plugin_dir_path(__FILE__).'data/';
             $dest_path = $uploadFileDir . $newFileName;
 
@@ -124,7 +127,4 @@
             exit();
         }
     }
-}
-elseif(isset($_POST['clearData']) && $_POST['clearData'] == 'Delete'){
-    cleardata();
 }

pdf-generator-ajax-script.js

@@ -0,0 +1,17 @@
+jQuery(document).ready(function($) {
+    // Button click event to flush out generated data
+    $('#delete_data_btn').click(function() {
+        console.log('Clicked');
+      $.ajax({
+        type: 'GET',
+        url: pdf_generator_ajax_params.ajax_url,
+        data: {
+          'action': 'cleardata'
+        },
+        success: function(response) {
+          console.log(response);
+        }
+      });
+    });
+  });
+

pdf-generator.php

@@ -8,7 +8,7 @@
 
 Description:  Generate PDF from CSV files 
 
-Version:      1.2
+Version:      1.2.1
 
 Author:       Speed 
 
@@ -35,4 +35,14 @@ function pdf_generator_function(){
   require($pluginDirPath.'generate.php');
 }
 $pluginDirPath = plugin_dir_path(__FILE__);
-require($pluginDirPath.'functions.php');
+require($pluginDirPath.'functions.php');
+
+// Hook to register AJAX action that will call functions from functions.php file
+function pdf_generator_register_ajax_action() {
+  wp_register_script('pdf-generator-ajax-script', plugins_url('/pdf-generator-ajax-script.js', __FILE__), array('jquery'));
+  wp_localize_script('pdf-generator-ajax-script', 'pdf_generator_ajax_params', array(
+    'ajax_url' => admin_url('admin-ajax.php')
+  ));
+  wp_enqueue_script('pdf-generator-ajax-script');
+}
+add_action('admin_enqueue_scripts', 'pdf_generator_register_ajax_action');