ProcessWire gravatar

Gravatar.module

<?php

/**
 * Basic shell of a module for generating Gravatar URLs for ProcessWire users.
 *
 * Mostly based on official implementation guidance here:
 * https://en.gravatar.com/site/implement/images/php/
 *
 *
 * Use it like this:
 *
 * Get URL only with all defaults:
 * $user->gravatar()
 *
 * Get image tag with different size:
 * $user->gravatar(array('img' => true, 's' => 200));
 *
 */

class Gravatar extends WireData implements Module {

	public static function getModuleInfo() {
		return array(
			'title' => 'Gravatar',
			'version' => 1,
			'summary' => 'Gravatar hook for users',
			'singular' => true,
			'autoload' => true,
			'icon' => 'smile-o',
		);
	}

	public function init() {
		$this->addHook('User::gravatar', $this, 'methodGravatar');
	}

	public function methodGravatar($event) {

		$u = $event->object;
		if ( ! $u instanceof User) $event->return = false; return;
		if ( ! $u->email) $event->return = false; return;

		$params = ($event->arguments(0) ? $event->arguments(0) : array());

		// Default options
		$defaults = array(
			's' => 100,
			'd' => 'retro',
			'r' => 'g',
			'img' => false,
			'attrs' => array(),
		);

		$opts = array_merge($defaults, $params);
		extract($opts);

		$url = '//www.gravatar.com/avatar/';
		$url .= md5(strtolower(trim($u->email)));
		$url .= "?s=$s&amp;d=$d&amp;r=$r";

		if ($img) {
			$url = '<img src="' . $url . '"';
			foreach ($attrs as $key => $val ) {
				$url .= ' ' . $key . '="' . $val . '"';
			}
			$url .= ' />';
		}

		$event->return = $url;
	}

}