function tdr_save_global_key_value_pair()
{
// Initialize
$tdr_product = new Thunder_Plugin_Products();
// Setup request return info for client callback
$return_array = array('message' => '', 'confirm_message' => '', 'confirm_request' => false, 'error' => '', 'confirmation_key' => '');
// Set other defaults
$keys_changed = false;
$save_changes = false;
$synch_changes = false;
// Check javascript client script version
if ($_POST['client_version'] != 0.1) {
$return_array['error'] = 'Your browser has an old version of the page loaded. Please try refreshing your page or clearing your browser cache, then try again.';
} else {
// Data is already decoded
// Do any wanted filtering
$key_value_pairs = $_POST['key_value_json'];
$key_value_pairs = stripslashes($key_value_pairs);
$key_value_pairs = json_decode($key_value_pairs, true);
if (empty($key_value_pairs)) {
$return_array['error'] = 'There was a problem processing any data. Unless you intended to remove all fields and their values, this is bad.';
} else {
// Ensure meta_id is valid (exists)
$meta_id = esc_html($_POST['meta_id']);
$meta_array = $tdr_product->define_custom_meta_types();
$meta_id_valid = false;
foreach ($meta_array as $meta_entry) {
if ($tdr_product->underscore($meta_entry['uuid']) == $meta_id) {
$meta_id_valid = true;
}
}
if (!$meta_id_valid) {
$return_array['error'] = 'The submission request contained tampered information.';
} else {
// Need to get post id for ajax calling post
$post_id = $_POST['post_id'];
$meta_value = get_post_meta($post_id, $meta_id, true);
// Check if number or names of fields have changed
$original_keys = get_option($meta_id . '_keys');
$original_keys = array_keys($original_keys);
$newest_keys = array_keys($key_value_pairs);
if (count($original_keys) == count($newest_keys)) {
$key_difference = array_diff($newest_keys, $original_keys);
if (!empty($key_difference)) {
$keys_changed = true;
}
} else {
$keys_changed = true;
}
if ($keys_changed) {
// Check for admin powers
if (!current_user_can('administrator')) {
$return_array['error'] = 'You are not authorized to add/remove fields. Your changes will be discarded.';
} else {
// Check for confirmation key
if (!isset($_POST['confirmation_key'])) {
$return_array['confirm_request'] = true;
$return_array['confirm_message'] = 'You have changed the name/number of fields. This will synchronize across other products. Are you sure you want to continue?';
} else {
$save_changes = true;
$synch_changes = true;
}
}
} else {
// Proceed to save
$save_changes = true;
}
/**
* Save comparison points for current product
*/
if ($save_changes) {
// JSON Encode the meta
$new_meta_value = json_encode($key_value_pairs);
/* If there the new meta value is blank but an old value existed, delete it. */
if ('' == $new_meta_value && $meta_value) {
delete_post_meta($post_id, $meta_id, $meta_value);
} else {
update_post_meta($post_id, $meta_id, $new_meta_value);
}
$return_array['message'] = 'Your changes to this product have been saved';
}
/**
* Synchronize changes to fields to other products
*/
if (!$synch_changes) {
} else {
$new_option_value = array_keys($key_value_pairs);
$new_option_value = array_map("strval", $new_option_value);
$new_option_array = array();
foreach ($new_option_value as $key) {
// Keys mapped to empty string
$new_option_array[$key] = "";
}
update_option($meta_id . '_keys', $new_option_array);
// Get information about key changes
$key_changes_list = $_POST['key_changes'];
$key_changes_list = stripslashes($key_changes_list);
$key_changes_list = json_decode($key_changes_list, true);
// List of key changes will be empty if all keys are new or all old keys are removed
// START Synchronize fields to other saved products
// The Query
$args = array('post_type' => 'tdr_product', 'posts_per_page' => -1, 'post__not_in' => array($post_id));
$the_query = new WP_Query($args);
// Import important comparison keys from wordpress options table
// Get serialized list of custom comparison keys from WP options -- false if not set
$comparison_keys = get_option($meta_id . '_keys', $default = array());
// The Loop
while ($the_query->have_posts()) {
$the_query->the_post();
global $post;
// Fetch current serialized key-value pair for tdr_product in the loop
$product_comparison_meta = get_post_meta($post->ID, $meta_id, true);
// Deserialize
$product_comparison_meta = json_decode($product_comparison_meta, true);
if (empty($product_comparison_meta)) {
// Make an empty array if not set
$product_comparison_meta = array();
}
// Access important keys from class attribute
$base_key_array = $tdr_product->fetch_custom_keys($meta_id);
// Change names of saved keys that were renamed
foreach ($key_changes_list as $original_key => $renamed_key) {
// Assign old key's value to renamed key
$product_comparison_meta[$renamed_key] = $product_comparison_meta[$original_key];
// Remove original key
unset($product_comparison_meta[$original_key]);
}
// Find saved values with important keys
$product_comparison_meta = array_intersect_key($product_comparison_meta, $base_key_array);
// Add any missing important keys
$merged_fields = $product_comparison_meta + $base_key_array;
// Because they are originally serialized by javascript, resaving them here will make them a bit different: e.g., no HTML entities
// Reserialize
$merged_fields = json_encode($merged_fields);
// Save
update_post_meta($post->ID, $meta_id, $merged_fields);
}
// Reset Post Data
wp_reset_postdata();
$return_array['message'] .= ' and synchronized to ' . $the_query->post_count . ' other products';
// END Synchronize fields to other saved products
}
}
}
}
$return_json = json_encode($return_array);
echo $return_json;
die;
// this is required to return a proper result
}
