Add complete custom fields implementation and entry editing

- Add custom field CRUD in admin UI (create, read, update, delete)
- Display custom fields on frontend form with proper field types
- Save custom field values on form submission
- Display custom field columns in entries table (admin and public)
- Include custom field values in all export formats (CSV, PairGoTh, OpenGotha, McMahon)
- Add Edit button and form for entries
- Update entry handler to support editing with custom field values
- Add success/error notices for all admin actions

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

go-form-plugin/go-form-plugin.php

@@ -11,17 +11,19 @@ function go_form_activate()
   $charset = $wpdb->get_charset_collate();
   $forms = $wpdb->prefix . 'go_form_forms';
   $entries = $wpdb->prefix . 'go_form_entries';
+  $custom_fields = $wpdb->prefix . 'go_form_custom_fields';
+  $custom_values = $wpdb->prefix . 'go_form_entry_custom_values';
 
   dbDelta("CREATE TABLE $forms (
-        id mediumint(9) NOT NULL AUTO_INCREMENT,
+        id int NOT NULL AUTO_INCREMENT,
         name varchar(255) NOT NULL,
         created_at datetime DEFAULT CURRENT_TIMESTAMP NOT NULL,
         PRIMARY KEY (id)
     ) $charset;");
 
   dbDelta("CREATE TABLE $entries (
-        id mediumint(9) NOT NULL AUTO_INCREMENT,
-        form_id mediumint(9) DEFAULT 1,
+        id int NOT NULL AUTO_INCREMENT,
+        form_id int DEFAULT 1,
         first_name varchar(100) NOT NULL,
         last_name varchar(100) NOT NULL,
         country varchar(100) DEFAULT NULL,
@@ -31,13 +33,41 @@ function go_form_activate()
         egd_number varchar(20) DEFAULT NULL,
         created_at date DEFAULT CURRENT_TIMESTAMP NOT NULL,
         PRIMARY KEY (id),
-        FOREIGN KEY (form_id) REFERENCES $forms(id) ON DELETE CASCADE
+        FOREIGN KEY (form_id) REFERENCES $forms(id) ON DELETE CASCADE,
+        INDEX (form_id)
+    ) $charset;");
+
+  dbDelta("CREATE TABLE $custom_fields (
+        id int NOT NULL AUTO_INCREMENT,
+        form_id int NOT NULL,
+        field_name varchar(100) NOT NULL,
+        field_type enum('select','text','checkbox', 'email') NOT NULL DEFAULT 'text',
+        field_options text,
+        is_public tinyint(1) NOT NULL DEFAULT 0,
+        is_required tinyint(1) NOT NULL DEFAULT 0,
+        PRIMARY KEY (id),
+        FOREIGN KEY (form_id) REFERENCES $forms(id) ON DELETE CASCADE,
+        INDEX (form_id)
+    ) $charset;");
+
+  dbDelta("CREATE TABLE $custom_values (
+        id int NOT NULL AUTO_INCREMENT,
+        entry_id int NOT NULL,
+        field_id int NOT NULL,
+        value text,
+        PRIMARY KEY (id),
+        FOREIGN KEY (entry_id) REFERENCES $entries(id) ON DELETE CASCADE,
+        FOREIGN KEY (field_id) REFERENCES $custom_fields(id) ON DELETE CASCADE,
+        INDEX (entry_id),
+        INDEX (field_id)
     ) $charset;");
 }
 
 function go_form_uninstall()
 {
   global $wpdb;
+  $wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}go_form_entry_custom_values");
+  $wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}go_form_custom_fields");
   $wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}go_form_entries");
   $wpdb->query("DROP TABLE IF EXISTS {$wpdb->prefix}go_form_forms");
 }
@@ -76,13 +106,62 @@ function go_form_get_entries($form_id)
   ));
 }
 
-function go_form_render_entries_table($entries, $show_admin = false)
+function go_form_render_entries_table($entries, $show_admin = false, $custom_fields = [], $form_id = 0)
 {
   global $ranks;
 
   include "templates/table.php";
 }
 
+// ========== Custom Fields Helpers ==========
+function go_form_get_custom_fields($form_id)
+{
+  global $wpdb;
+  return $wpdb->get_results($wpdb->prepare(
+    "SELECT * FROM {$wpdb->prefix}go_form_custom_fields WHERE form_id = %d ORDER BY id ASC",
+    $form_id
+  ));
+}
+
+function go_form_get_custom_field_by_id($field_id)
+{
+  global $wpdb;
+  return $wpdb->get_row($wpdb->prepare(
+    "SELECT * FROM {$wpdb->prefix}go_form_custom_fields WHERE id = %d",
+    $field_id
+  ));
+}
+
+function go_form_get_custom_values($entry_id)
+{
+  global $wpdb;
+  return $wpdb->get_results($wpdb->prepare(
+    "SELECT cf.*, cv.value FROM {$wpdb->prefix}go_form_custom_fields cf
+     JOIN {$wpdb->prefix}go_form_entry_custom_values cv ON cf.id = cv.field_id
+     WHERE cv.entry_id = %d",
+    $entry_id
+  ));
+}
+
+function go_form_get_custom_value($entry_id, $field_id)
+{
+  global $wpdb;
+  return $wpdb->get_var($wpdb->prepare(
+    "SELECT value FROM {$wpdb->prefix}go_form_entry_custom_values
+     WHERE entry_id = %d AND field_id = %d",
+    $entry_id, $field_id
+  ));
+}
+
+function go_form_get_entry_by_id($entry_id)
+{
+  global $wpdb;
+  return $wpdb->get_row($wpdb->prepare(
+    "SELECT * FROM {$wpdb->prefix}go_form_entries WHERE id = %d",
+    $entry_id
+  ));
+}
+
 // ========== Form Handling ==========
 function go_form_handle_submission()
 {
@@ -120,6 +199,34 @@ function go_form_handle_submission()
   }
 
   $wpdb->insert("{$wpdb->prefix}go_form_entries", $data);
+  $entry_id = $wpdb->insert_id;
+
+  // Save custom field values
+  $custom_fields = go_form_get_custom_fields($form_id);
+  foreach ($custom_fields as $field) {
+    $field_name = 'custom_field_' . $field->id;
+    if (isset($_POST[$field_name])) {
+      $value = $_POST[$field_name];
+      if ($field->field_type === 'checkbox') {
+        $value = isset($_POST[$field_name]) ? '1' : '0';
+      } elseif (is_array($value)) {
+        $value = implode(',', array_map('sanitize_text_field', $value));
+      } else {
+        $value = sanitize_text_field($value);
+      }
+      $wpdb->insert("{$wpdb->prefix}go_form_entry_custom_values", [
+        'entry_id' => $entry_id,
+        'field_id' => $field->id,
+        'value' => $value
+      ]);
+    } elseif ($field->is_required) {
+      // If required field is missing, delete the entry and redirect back
+      $wpdb->delete("{$wpdb->prefix}go_form_entries", ['id' => $entry_id]);
+      wp_redirect($_SERVER['HTTP_REFERER']);
+      exit;
+    }
+  }
+
   wp_redirect($_SERVER['HTTP_REFERER']);
   exit;
 }
@@ -233,6 +340,157 @@ function go_form_export_mcmahon()
 }
 add_action('admin_post_go_form_export_mcmahon', 'go_form_export_mcmahon');
 
+// ========== Custom Field Admin Actions ==========
+function go_form_create_custom_field()
+{
+  go_form_admin_action('create_custom_field');
+  if (isset($_POST['form_id']) && isset($_POST['field_name']) && isset($_POST['field_type'])) {
+    global $wpdb;
+    $form_id = intval($_POST['form_id']);
+    $field_name = sanitize_text_field($_POST['field_name']);
+    $field_type = sanitize_text_field($_POST['field_type']);
+    $field_options = isset($_POST['field_options']) ? sanitize_textarea_field($_POST['field_options']) : '';
+    $is_public = isset($_POST['is_public']) ? 1 : 0;
+    $is_required = isset($_POST['is_required']) ? 1 : 0;
+
+    $wpdb->insert("{$wpdb->prefix}go_form_custom_fields", [
+      'form_id' => $form_id,
+      'field_name' => $field_name,
+      'field_type' => $field_type,
+      'field_options' => $field_options,
+      'is_public' => $is_public,
+      'is_required' => $is_required
+    ]);
+  }
+  $redirect_url = add_query_arg(array('page' => 'go-form-settings', 'form_id' => $_POST['form_id'], 'created_field' => 1), admin_url('admin.php'));
+  wp_redirect($redirect_url);
+  exit;
+}
+add_action('admin_post_go_form_create_custom_field', 'go_form_create_custom_field');
+
+function go_form_update_custom_field()
+{
+  go_form_admin_action('update_custom_field');
+  if (isset($_POST['field_id']) && isset($_POST['field_name']) && isset($_POST['field_type'])) {
+    global $wpdb;
+    $field_id = intval($_POST['field_id']);
+    $field_name = sanitize_text_field($_POST['field_name']);
+    $field_type = sanitize_text_field($_POST['field_type']);
+    $field_options = isset($_POST['field_options']) ? sanitize_textarea_field($_POST['field_options']) : '';
+    $is_public = isset($_POST['is_public']) ? 1 : 0;
+    $is_required = isset($_POST['is_required']) ? 1 : 0;
+
+    $wpdb->update("{$wpdb->prefix}go_form_custom_fields", [
+      'field_name' => $field_name,
+      'field_type' => $field_type,
+      'field_options' => $field_options,
+      'is_public' => $is_public,
+      'is_required' => $is_required
+    ], ['id' => $field_id]);
+  }
+  $redirect_url = add_query_arg(array('page' => 'go-form-settings', 'form_id' => $_POST['form_id'], 'updated_field' => 1), admin_url('admin.php'));
+  wp_redirect($redirect_url);
+  exit;
+}
+add_action('admin_post_go_form_update_custom_field', 'go_form_update_custom_field');
+
+function go_form_delete_custom_field()
+{
+  go_form_admin_action('delete_custom_field');
+  if (isset($_POST['field_id'])) {
+    global $wpdb;
+    $field_id = intval($_POST['field_id']);
+    $field = go_form_get_custom_field_by_id($field_id);
+    $form_id = $field ? $field->form_id : 0;
+    $wpdb->delete("{$wpdb->prefix}go_form_custom_fields", ['id' => $field_id]);
+    $redirect_url = add_query_arg(array('page' => 'go-form-settings', 'form_id' => $form_id, 'deleted_field' => 1), admin_url('admin.php'));
+    wp_redirect($redirect_url);
+    exit;
+  }
+  $redirect_url = add_query_arg(array('page' => 'go-form-settings'), admin_url('admin.php'));
+  wp_redirect($redirect_url);
+  exit;
+}
+add_action('admin_post_go_form_delete_custom_field', 'go_form_delete_custom_field');
+
+// ========== Entry Edit Admin Action ==========
+function go_form_update_entry()
+{
+  go_form_admin_action('update_entry');
+  if (!isset($_POST['entry_id']) || !isset($_POST['form_id'])) {
+    wp_redirect(admin_url('admin.php?page=go-form-settings'));
+    exit;
+  }
+
+  global $wpdb;
+  $entry_id = intval($_POST['entry_id']);
+  $form_id = intval($_POST['form_id']);
+  
+  $rating = intval($_POST['rating']);
+  $rank = intval($_POST['rank']);
+  if ($rating < -900) {
+    $rating = ($rank * 100) - 900;
+  }
+
+  $data = [
+    'first_name' => sanitize_text_field($_POST['first_name']),
+    'last_name' => sanitize_text_field($_POST['last_name']),
+    'country' => sanitize_text_field($_POST['country'] ?? ''),
+    'club' => sanitize_text_field($_POST['club'] ?? ''),
+    'rank' => $rank,
+    'rating' => $rating,
+    'egd_number' => sanitize_text_field($_POST['egd_number'] ?? ''),
+  ];
+
+  if (empty($data['first_name']) || empty($data['last_name'])) {
+    $redirect_url = add_query_arg(array('page' => 'go-form-settings', 'form_id' => $form_id, 'edit_entry' => $entry_id, 'error' => 'missing_required'), admin_url('admin.php'));
+    wp_redirect($redirect_url);
+    exit;
+  }
+
+  $wpdb->update("{$wpdb->prefix}go_form_entries", $data, ['id' => $entry_id]);
+
+  // Update custom field values
+  $custom_fields = go_form_get_custom_fields($form_id);
+  foreach ($custom_fields as $field) {
+    $field_name = 'custom_field_' . $field->id;
+    if (isset($_POST[$field_name])) {
+      $value = $_POST[$field_name];
+      if ($field->field_type === 'checkbox') {
+        $value = isset($_POST[$field_name]) ? '1' : '0';
+      } elseif (is_array($value)) {
+        $value = implode(',', array_map('sanitize_text_field', $value));
+      } else {
+        $value = sanitize_text_field($value);
+      }
+      
+      // Check if custom value exists
+      $existing = go_form_get_custom_value($entry_id, $field->id);
+      if ($existing !== null) {
+        $wpdb->update("{$wpdb->prefix}go_form_entry_custom_values", 
+          ['value' => $value], 
+          ['entry_id' => $entry_id, 'field_id' => $field->id]);
+      } else {
+        $wpdb->insert("{$wpdb->prefix}go_form_entry_custom_values", [
+          'entry_id' => $entry_id,
+          'field_id' => $field->id,
+          'value' => $value
+        ]);
+      }
+    } elseif ($field->is_required) {
+      // If required field is missing, redirect back with error
+      $redirect_url = add_query_arg(array('page' => 'go-form-settings', 'form_id' => $form_id, 'edit_entry' => $entry_id, 'error' => 'missing_required_field'), admin_url('admin.php'));
+      wp_redirect($redirect_url);
+      exit;
+    }
+  }
+
+  $redirect_url = add_query_arg(array('page' => 'go-form-settings', 'form_id' => $form_id, 'updated_entry' => 1), admin_url('admin.php'));
+  wp_redirect($redirect_url);
+  exit;
+}
+add_action('admin_post_go_form_update_entry', 'go_form_update_entry');
+
 // ========== Admin Page ====================
 function go_form_admin_menu()
 {