wpap-functions.php

<?php

	// how to print each meta box type
	function wpap_print_option ($opt) {
	
		switch ($opt['type']) {
			case "inputtext": wpap_print_option_input_text($opt); break;
			case "upload":    wpap_print_meta_upload($opt); break;
		}
	}
	
	// nonce Verification	
	function wpap_set_nonce () {
		wp_nonce_field(plugin_basename(__FILE__), 'wpap_pubnonce');	
	}
	
	// text => name, title, value, default
	function wpap_print_option_input_text ($args) {

		?>
		
		<input type="text" name="<?php echo $args['name']; ?>" id="<?php echo $args['name']; ?>" value="<?php echo $args['value']; ?>" style="width:100%" />
		<p><?php echo $args['extra']; ?></p>
			
		<?php

	}

	// text => name, title, value
	function wpap_print_meta_upload ($args) {
		
		$src = '';
		
		if (!empty($args['value'])) {
			$src = wp_get_attachment_url($args['value']);
		}
		
		?>
		
		<input name="<?php echo $args['name']; ?>" type="hidden" id="upload_image_attachment_id" value="<?php echo esc_html($args['value']); ?>" />
		<input id="upload_image_text_meta" type="text" value="<?php echo $src; ?>" style="width:80%" />
		<input class="upload_image_button_meta" type="button" value="Upload" />

		<p><?php echo $args['extra']; ?></p>
		
		<?php
		
	}

	/* save option function that trigger when saveing each post
	 */
	function wpap_save_option_meta ($post_id) {
	
		// Verification
		if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;
		if (!isset($_POST['wpap_pubnonce'])) return;
		if (!wp_verify_nonce($_POST['wpap_pubnonce'], plugin_basename( __FILE__ ))) return;
		
		if ($_POST['post_type'] == 'publication') {
			if (!current_user_can('edit_post', $post_id)) return;
			
			wpap_save_publication_option_meta($post_id);
		}
		
	}
	
	/* function that save the meta to database if new data is exists and is not
	 * equals to old one.
	 */
	function wpap_save_meta_data ($post_id, $new_data, $old_data, $name) {

		if ($new_data == $old_data) {
			add_post_meta($post_id, $name, $new_data, true);
			
		} else if (!$new_data) {
			delete_post_meta($post_id, $name, $old_data);
			
		} else if ($new_data != $old_data) {
			update_post_meta($post_id, $name, $new_data, $old_data);
			
		}
	}

	/* Takes all key,value pairs from $changes and if the key is present in
	 * $base, sets $base[key] equal to $changes[key].
	 */
	function wpap_array_merge ($base, $changes) {
		if (!is_array($base) || !is_array($changes)) {
			return;
		}

		foreach ($changes as $key => $value) {
			if (array_key_exists($key, $base)) {
				$base[$key] = $value;
			}
		}
		return $base;
	}

	/* Add .bib files to allowed mime types.
	 */
	function wpap_add_bib_to_mimes ($existing_mimes) {
 		$existing_mimes['bib'] = 'text/plain';
	 	return $existing_mimes; 
	}

?>