CGD_EDDSL_Magic

A drop-in class that magically manages your EDD SL plugin licensing.

What is magic and why do I need it?

EDD's brilliant Software Licensing add-on is awesome, but its implementation examples are thin. Managing the various activation and licensing states takes a good amount of research and setup.

Once you have it setup, it can be a major pain in the tucus to manage across your various plugins.

For example, I have 8 plugins. Everytime I find a bug in my licensing code, I have to update 8 plugins that have 8 slightly different implementations. It's a major headache.

CGD_EDDSL_Magic fixes all of this. With as little as a single line of code, you can add a fully functioning licensing settings page to your plugin.

Installing

The best way to install is with composer: composer require objectivco/cgd_eddsl_magic

Alternative method

1. Copy or clone CGD_EDDSL_Magic into your plugin project. Put it in a lib or inc folder.

2. At the top of your main plugin file, or wherever you do your includes, add some code like:

if ( ! class_exists( 'CGD_EDDSL_Magic' ) ) {
	// load our custom updater
	include( dirname( __FILE__ ) . '/lib/CGD_EDDSL_Magic/CGD_EDDSL_Magic.php' );
}

Instantiating

In your plugin constructor (or in the main plugin file if you're not using classes for some reason), instantiate CGD_EDDSL_Magic.

$updater = new CGD_EDDSL_Magic($prefix, $menu_slug,  $host_url, $plugin_version, $plugin_name, $plugin_author, $plugin_file, $theme = false, $beta = false, $home_url = false);

Note: The last parameter, $plugin_file is technically optional, but it's better to pass it in. This should be the main file for your plugin, the one with the plugin header. If you're in the main plugin file, use __FILE__, otherwise, define it as a constant in your main plugin file and pass it in when you instantiate the class.

The parameters:

$prefix

This is a unique prefix for your instance. It's used for saving settings and hooking up various behaviors. Keep it short, and no spaces or weird symbols or other funny business. Example: myplugin

$menu_slug

Assuming your plugin has a menu page, you would set the slug of that menu here so that CGD_EDDSL_Magic can add a submenu called "License" to this menu. If you'd rather control this yourself, set to false.

$host_url

The URL of the site that hosts your plugins.

$plugin_version

The version of the plugin.

$plugin_name

The name of the plugin as setup in EDD.

$plugin_author

The author of the plugin.

$plugin_file

The main plugin file.

$theme

Set to true for theme updates.

$beta

Set to true to enable beta versions.

$home_url

Defaults to false. If false, it uses home_url() for activation checks. Otherwise, you can pass in a URL to check.

---

If you're using a class, it's probably a good idea to set a class variable called updater and then assign the new CGD_EDDSL_Magic instance to that. It will make it easier to access later.

In a basic setup, you're done at this point. Your plugin will now have a fully functioning license settings page, added to whatever your parent menu is. For more advanced options, continue below.

What about updating themes?

If your project is a theme, you simply need to set the $theme parameter above to true. This makes the $plugin_file parameter uneccessary, so you can simply set this parameter to false. Either way, it will not be used.

Advanced Implementation

Controlling the licensing settings page

By default, a menu item called "License" is added to the parent menu of your choice. If you would like to have full control of where the license settings page is, that's actually really easy to do too.

Just set $menu_slug to false in your instantation, and then drop this line in your admin page, wherever you prefer:

$updater->admin_page();

Obviously, the exact syntax will vary depending on how you implement it. This is one reason I find it easier to set the updater instance as a class variable.

One important note: Do not place this line in another HTML form. It will screw things up. Browsers hate nested forms. (and HTML standards do not permit them)

Cronning license checks

If you want it, CGD_EDDSL_Magic includes a way to force regular license checks. To do this, you'd add the following code to your activation or deactivation hooks:

Activation hook

$this->updater->set_license_check_cron();

Deactivation hook

$this->updater->unset_license_check_cron();

This will create daily checks that keep your key_status variable up-to-date.

Really Advanced Implementation

If this does not satisfy you, and you want to add some type of nag to the plugin listing on the plugins page in WP admin, here's a quick example of how you might do that. This is just a starting point, so you'll have to parse through it to figure out how it works.

	add_action('admin_menu', 'add_key_nag', 11);
	function add_key_nag() {
		global $pagenow;

	    if( $pagenow == 'plugins.php' ) {
	        add_action( 'after_plugin_row_' . plugin_basename(__FILE__), 'after_plugin_row_message', 10, 2 );
	    }
	}

	function after_plugin_row_message() {
		$key_status = $this->updater->get_field_value('key_status');

		if ( empty($key_status) ) return;

		if ( $key_status != "valid" ) {
			$current = get_site_transient( 'update_plugins' );
			if ( isset( $current->response[ plugin_basename(__FILE__) ] ) ) return;

			if ( is_network_admin() || ! is_multisite() ) {
				$wp_list_table = _get_list_table('WP_Plugins_List_Table');
				echo '<tr class="plugin-update-tr"><td colspan="' . $wp_list_table->get_column_count() . '" class="plugin-update colspanchange"><div class="update-message">';
				echo keynag();
				echo '</div></td></tr>';
			}
		}
	}

	function keynag() {
		return "<span style='color:red'>You're missing out on important updates because your license key is missing, invalid, or expired.</span>";
	}

Changelog

Version 0.5.3

• Change license key field to a password field.

Version 0.5.2

• Fixed bug with setting home url to passed in value.

Version 0.5.1

• Ok, that deprecated option was a bad idea. I'm removing it and instead providing the ability to pass in the URL you want to use for activation with a default to home_url()

Version 0.5.0

• Add deprecated_url option and default to true. This tells the updater to check home_url() for site activation actions instead of get_site_url(). New projects should use get_site_url().
• WP Coding Standards fixes.

Version 0.4.0

• Fix return types.
• Replace invalid reference to class EDD_SL_Theme_Updater with EDD_Theme_Updater.

Version 0.3.2

• Composer package.
• Update EDD_SL_Plugin_Updater.
• Add some utility functions that we use internally that you may find useful.

Version 0.3.1

• Add trailing slash to remote API url. Fixes odd bug with wp_remote_get().

Version 0.3

• Added theme update support!

Version 0.2

• Added url parameter to API requests for more reliable handling.

Version 0.1

• Initial release.