start.php

<?php

/*
 * The lunch plugin is responsible for:
 * 1. Lunch entity
 * 2. Topic entity
 * 3. School entity (extends Group)
 *
 */

function lunch_init() {
	
	/** 
	 * Shared libraries, CSS and JS
	 */
	elgg_register_library('elgg:lunch', elgg_get_plugins_path() . 'lunch/lib/lunch.php');
	elgg_register_library('elgg:lunch:api', elgg_get_plugins_path() . 'lunch/lib/api.php');
	elgg_register_css('fullcalendar', "/mod/lunch/vendors/fullcalendar/fullcalendar.css");
	elgg_register_js('fullcalendar', "/mod/lunch/vendors/fullcalendar/fullcalendar.js");
	elgg_load_library('elgg:lunch:api');

	/**
	 * Action registrations
	 */
	elgg_register_action("lunch/save", elgg_get_plugins_path() . "lunch/actions/lunch/save.php");
	elgg_register_action("lunch/delete", elgg_get_plugins_path() . "lunch/actions/lunch/delete.php");
	elgg_register_action("topic/save", elgg_get_plugins_path() . "lunch/actions/topic/save.php");

	/**
	 * Page handlers
	 */ 
	elgg_register_page_handler('lunch', 'lunch_page_handler');
	elgg_register_page_handler('topic', 'topic_page_handler');
	elgg_register_page_handler('map', 'map_page_handler');
	elgg_register_page_handler('calendar', 'calendar_page_handler');
	elgg_register_page_handler('howto', 'howto_page_handler');
	elgg_register_page_handler('activity', 'activity_page_handler');
		
	/**
	 * Plugin hook handlers
	 */
	elgg_register_plugin_hook_handler('index', 'system', 'lunch_index'); // Override index
	elgg_register_plugin_hook_handler('login', 'lunch', 'lunch_index'); // Override login
	elgg_register_plugin_hook_handler('profile:fields', 'group', 'lunch_school_profile_fields', 1);
    elgg_register_plugin_hook_handler('action', 'groups/edit', 'lunch_address_hook');
	elgg_register_plugin_hook_handler('register', 'user', 'lunch_register_hook');
	elgg_register_plugin_hook_handler('prepare', 'menu:page', 'menu_hook_handler', 1000);
	elgg_register_plugin_hook_handler('prepare', 'menu:extras', 'menu_hook_handler', 1000);
	elgg_register_plugin_hook_handler('prepare', 'menu:site', 'menu_hook_handler', 1000);
	elgg_register_plugin_hook_handler('entity:icon:url', 'user', 'gravatar_hook_handler', 900); // Gravatar support
	elgg_register_plugin_hook_handler('public_pages', 'walled_garden', 'public_pages_hook_handler'); // Make some pages public	

    /**
     * Menu registration
     */
	elgg_register_menu_item('site', array('name' => 'howto', 'text' => 'How-to', 'href' => '/howto'));
	elgg_register_menu_item('site', array('name' => 'schools', 'text' => 'Schools', 'href' => '/map'));
	elgg_register_menu_item('site', array('name' => 'calendar', 'text' => 'Calendar', 'href' => '/calendar'));
	elgg_register_menu_item('site', array('name' => 'topics', 'text' => 'Topics', 'href' => '/topic'));

	/**
	 * Event Handlers
	 */
	elgg_register_event_handler('delete', 'all', 'lunch_delete_handler');
		
	/**
	 * Extend views
	 */
	elgg_extend_view('groups/tool_latest', 'lunch/group_module');
	elgg_extend_view('css/elgg', 'lunch/css');	
	
	/**
	* Group customizations
	*/
	remove_group_tool_option('activity');
	remove_group_tool_option('forum');

}


/*
 * Plugin hook handlers
 */
function lunch_school_profile_fields($hook, $type, $fields, $params) {
	return array(
		'street' => 'text',
		'city' => 'text',
        'geocode' => 'hidden',
//		'briefdescription' => 'text',
		'description' => 'longtext',
//		'interests' => 'tags',
		'activity_enable' => 'hidden',
		'forum_enable' => 'hidden',
	);
}
    
// Converts school address to geocode using Google API
function lunch_address_hook($hook, $type, $fields, $params) {
	elgg_load_library('elgg:lunch');
    $street = urlencode(get_input('street'));
    $city = urlencode(get_input('city'));
	$json = lunch_geocode($street . ',+' . $city);
    set_input('geocode', $json['results'][0]['geometry']['location']);
    set_input('activity_enable', 'no');
    set_input('forum_enable', 'no');
    return true;
}

// Sets username to guid
function lunch_register_hook($hook, $type, $fields, $params) {
	
	// Set username to guid
	$guid = $params['user']->getGUID();
	$user = get_entity($guid);
	$user->__set("username", $guid);
	
	// Set graduation metadata
	$graduation = (int) get_input('graduation');
	$user->graduation = graduation;
	return true;
}

/**
 * Delete Event
 * TODO: Basic recycle bin
 */
function lunch_delete_handler($event, $type, $params) {
	switch($type) {
		case 'group':
			// Delete if admin
			if (elgg_is_admin_logged_in ()) {
				return true;
			}
			// Otherwise, disable
			$group = get_entity($params->getGUID());
			$group->disable();
			return false;
	}

	return true;
}    
		
/*
 * Page Handlers
 * 
 */	
function lunch_page_handler($segments) {
    switch ($segments[0]) {
        case 'add':
           include elgg_get_plugins_path() . 'lunch/pages/lunch/add.php';
           break;
        case 'all':
        default:
           include elgg_get_plugins_path() . 'lunch/pages/lunch/all.php';
           break;
    }
    return true;
}

function topic_page_handler($segments) {
    switch ($segments[0]) {
        case 'icon':
			include elgg_get_plugins_path() . 'lunch/pages/topic/icon.php';
			break;
		case 'add':
           	include elgg_get_plugins_path() . 'lunch/pages/topic/add.php';
           	break;
		case 'view':
			include elgg_get_plugins_path() . 'lunch/pages/topic/view.php';
			break;
        case 'all':
        default:
           	include elgg_get_plugins_path() . 'lunch/pages/topic/all.php';
           	break;
    }
    return true;
}

function map_page_handler($segments) {
	include elgg_get_plugins_path() . 'lunch/pages/map/index.php';
	return true;
}

function calendar_page_handler($segments) {
	include elgg_get_plugins_path() . 'lunch/pages/calendar/index.php';
	return true;
}

function howto_page_handler($segments) {
	include elgg_get_plugins_path() . 'lunch/pages/howto/index.php';
	return true;
}

function activity_page_handler($segments) {
	include elgg_get_plugins_path() . 'lunch/pages/activity/index.php';
	return true;
}

/**
 * add menu item to owner block
 */
function lunch_gatekeeper($redirect = true) {
	elgg_load_library('elgg:lunch');
	if (!is_lunch_moderator()) {
		register_error("You must be a moderator to view that page.");
		if ($redirect) {
			forward(REFERER); // REFERER is a global variable that defines the previous page		
		} else {
			return false;
		}
	}
	return true;
}

/*
 * Removes menu items from other plugins
 */
function menu_hook_handler($hook, $type, $items, $params) {
	
	// Move all items out of 'more' array	
	$items['default'] = array_merge($items['default'], $items['more']);
	unset($items['more']);	

	foreach ($items['default'] as $key => $item) {
		switch ($item->getName()) {
			case 'groups:all': 
			case 'groups:member': 
			case 'groups:owned': 
			case 'groups:user:invites': 
			case 'rss': 
			case 'activity':
			case 'blog':
			case 'groups':
			case 'more':			
				unset($items['default'][$key]); 
				break;	
		}
    }
  return $items;
}


/**
 *  Add Gravatar to user icons
 */
function gravatar_hook_handler($hook, $type, $url, $params) {

	// check if user already has an icon
	if (!$params['entity']->icontime) {
		$icon_sizes = elgg_get_config('icon_sizes');
		$size = $params['size'];
		if (!in_array($size, array_keys($icon_sizes))) {
			$size = 'small';
		}

		// avatars must be square
		$size = $icon_sizes[$size]['w'];

		$hash = md5($params['entity']->email);
		return "https://secure.gravatar.com/avatar/$hash.jpg?d=mm&s=$size";
	}
}

/**
 * Extend the public pages range
 *
 */
function public_pages_hook_handler($hook, $handler, $return, $params){
	// These pages will be public!
	$pages = array(
		'mod/lunch/vendors/fullcalendar/.*', // Contains calendar javascript
		'calendar', 						 // Calendar menubar		
		'index', 							 // Homepage
		'map', 								 // Map menubar
		'topic',							 // Topics menubar
		'howto',							 // Howto menu bar	
		'groupicon/.*',						 // School logos
		);						
	return array_merge($pages, $return);
}
	
elgg_register_event_handler('init', 'system', 'lunch_init');
	
?>