<?php
/**
 * @file mod/thing.php
 * @brief
 */

require_once('include/items.php');
require_once('include/security.php');
require_once('include/contact_selectors.php');
require_once('include/acl_selectors.php');

function thing_init(&$a) {

	if(! local_channel())
		return;

	$channel    = $a->get_channel();

	$term_hash = (($_REQUEST['term_hash']) ? $_REQUEST['term_hash'] : '');

	$name = escape_tags($_REQUEST['term']);
	$verb = escape_tags($_REQUEST['verb']);
	$activity = intval($_REQUEST['activity']);
	$profile_guid = escape_tags($_REQUEST['profile_assign']);
	$url = $_REQUEST['link'];
	$photo = $_REQUEST['img'];

	$hash = random_string();

	$verbs = obj_verbs();

	/**
	 * verbs: [0] = first person singular, e.g. "I want", [1] = 3rd person singular, e.g. "Bill wants" 
	 * We use the first person form when creating an activity, but the third person for use in activities
	 * @FIXME There is no accounting for verb gender for languages where this is significant. We may eventually
	 * require obj_verbs() to provide full conjugations and specify which form to use in the $_REQUEST params to this module.
	 */

	$translated_verb = $verbs[$verb][1];

	/*
	 * The site administrator can do things that normals cannot.
	 * This is restricted because it will likely cause
	 * an activitystreams protocol violation and the activity might
	 * choke in some other network and result in unnecessary 
	 * support requests. It isn't because we're trying to be heavy-handed
	 * about what you can and can't do. 
	 */

	if(! $translated_verb) {
		if(is_site_admin())
			$translated_verb = $verb;
	}

	/*
	 * Things, objects: We do not provide definite (a, an) or indefinite (the) articles or singular/plural designators
	 * That needs to be specified in your thing. e.g. Mike has "a carrot", Greg wants "balls", Bob likes "the Boston Red Sox".  
	 */

	/*
	 * Future work on this module might produce more complex activities with targets, e.g. Phillip likes Karen's moustache
	 * and to describe other non-thing objects like channels, such as Karl wants Susan - where Susan represents a channel profile.
	 */
 
	if((! $name) || (! $translated_verb))
		return;

	$acl = new AccessList($channel);

	if(array_key_exists('contact_allow',$_REQUEST)
		|| array_key_exists('group_allow',$_REQUEST)
		|| array_key_exists('contact_deny',$_REQUEST)
		|| array_key_exists('group_deny',$_REQUEST)) {
		$acl->set_from_array($_REQUEST);
	}

	$x = $acl->get();
 
	if($term_hash) {
		$t = q("select * from obj where obj_obj = '%s' and obj_channel = %d limit 1",
			dbesc($term_hash),
			intval(local_channel())
		);
		if(! $t) {
			notice( t('Item not found.') . EOL);
			return;
		}
		$orig_record = $t[0];
		if($photo != $orig_record['obj_imgurl']) {
			$arr = import_xchan_photo($photo,get_observer_hash(),true);
			$local_photo = $arr[0];
			$local_photo_type = $arr[3];
		}
		else
			$local_photo = $orig_record['obj_imgurl'];

		$r = q("update obj set obj_term = '%s', obj_url = '%s', obj_imgurl = '%s', obj_edited = '%s', allow_cid = '%s', allow_gid = '%s', deny_cid = '%s', deny_gid = '%s' where obj_obj = '%s' and obj_channel = %d ",
			dbesc($name),
			dbesc(($url) ? $url : z_root() . '/thing/' . $term_hash),
			dbesc($local_photo),
			dbesc(datetime_convert()),
			dbesc($x['allow_cid']),
			dbesc($x['allow_gid']),
			dbesc($x['deny_cid']),
			dbesc($x['deny_gid']),
			dbesc($term_hash),
			intval(local_channel())
		);

		info( t('Thing updated') . EOL);

		$r = q("select * from obj where obj_channel = %d and obj_obj = '%s' limit 1",
			intval(local_channel()),
			dbesc($term_hash)
		);
		if($r) {
			build_sync_packet(0, array('obj' => $r));
		}

		return;
	}

	$sql = (($profile_guid) ? " and profile_guid = '" . dbesc($profile_guid) . "' " : " and is_default = 1 ");
	$p = q("select profile_guid, is_default from profile where uid = %d $sql limit 1",
		intval(local_channel())
	);

	if($p)
		$profile = $p[0];
	else
		return;

	$local_photo = null;

	if($photo) {
		$arr = import_xchan_photo($photo,get_observer_hash(),true);
		$local_photo = $arr[0];
		$local_photo_type = $arr[3];
	}

	$created = datetime_convert();
	$url = (($url) ? $url : z_root() . '/thing/' . $hash);

	$r = q("insert into obj ( obj_page, obj_verb, obj_type, obj_channel, obj_obj, obj_term, obj_url, obj_imgurl, obj_created, obj_edited, allow_cid, allow_gid, deny_cid, deny_gid ) values ('%s','%s', %d, %d, '%s','%s','%s','%s','%s','%s','%s','%s','%s','%s') ",
		dbesc($profile['profile_guid']),
		dbesc($verb),
		intval(TERM_OBJ_THING),
		intval(local_channel()),
		dbesc($hash),
		dbesc($name),
		dbesc($url),
		dbesc(($photo) ? $local_photo : ''),
		dbesc($created),
		dbesc($created),
		dbesc($x['allow_cid']),
		dbesc($x['allow_gid']),
		dbesc($x['deny_cid']),
		dbesc($x['deny_gid'])
	);

	if(! $r) {
		notice( t('Object store: failed'));
		return;
	}

	info( t('Thing added'));
	
	$r = q("select * from obj where obj_channel = %d and obj_obj = '%s' limit 1",
		intval(local_channel()),
		dbesc($hash)
	);
	if($r) {
		build_sync_packet(0, array('obj' => $r));
	}

	if($activity) {
		$arr = array();
		$links = array(array('rel' => 'alternate','type' => 'text/html', 'href' => $url));
		if($local_photo)
			$links[] = array('rel' => 'photo', 'type' => $local_photo_type, 'href' => $local_photo);

		$objtype = ACTIVITY_OBJ_THING;

		$obj = json_encode(array(
			'type'    => $objtype,
			'id'      => $url,
			'link'    => $links,
			'title'   => $name,
			'content' => $name
		));

		$bodyverb = str_replace('OBJ: ', '',t('OBJ: %1$s %2$s %3$s'));

		$arr['owner_xchan']  = $channel['channel_hash'];
		$arr['author_xchan'] = $channel['channel_hash'];

		$arr['item_origin'] = 1;
		$arr['item_wall'] = 1;
		$arr['item_thread_top'] = 1;

		$ulink = '[zrl=' . $channel['xchan_url'] . ']' . $channel['channel_name'] . '[/zrl]';
		$plink = '[zrl=' . $url . ']' . $name . '[/zrl]';

		$arr['body'] =  sprintf( $bodyverb, $ulink, $translated_verb, $plink );

		if($local_photo)
			$arr['body'] .= "\n\n[zmg]" . $local_photo . "[/zmg]";

		$arr['verb'] = $verb;
		$arr['obj_type'] = $objtype;
		$arr['object'] = $obj;

		if(! $profile['is_default']) {
			$arr['item_private'] = true;
			$str = '';
			$r = q("select abook_xchan from abook where abook_channel = %d and abook_profile = '%s'",
				intval(local_channel()),
				dbesc($profile_guid)
			);
			if($r) {
				$arr['allow_cid'] = '';
				foreach($r as $rr)
					$arr['allow_cid'] .= '<' . $rr['abook_xchan'] . '>';
			}
			else
				$arr['allow_cid'] = '<' . get_observer_hash() . '>';
		}

		$ret = post_activity_item($arr);
	}
}


function thing_content(&$a) {

	// @FIXME one problem with things is we can't share them unless we provide the channel in the url
	// so we can definitively lookup the owner. 

	if(argc() == 2) {

		$r = q("select obj_channel from obj where obj_type = %d and obj_obj = '%s' limit 1",
			intval(TERM_OBJ_THING),
			dbesc(argv(1))
		);
		if($r) 
			$sql_extra = permissions_sql($r[0]['obj_channel']);

		$r = q("select * from obj where obj_type = %d and obj_obj = '%s' $sql_extra limit 1",
			intval(TERM_OBJ_THING),
			dbesc(argv(1))
		);

		if($r) {
			return replace_macros(get_markup_template('show_thing.tpl'), array(
				'$header' => t('Show Thing'),
				'$edit' => t('Edit'),
				'$delete' => t('Delete'),
				'$canedit' => ((local_channel() && local_channel() == $r[0]['obj_channel']) ? true : false), 
				'$thing' => $r[0] ));
		}
		else {
			notice( t('item not found.') . EOL);
			return;
		}
	}

	$channel = $a->get_channel();

	if(! (local_channel() && $channel)) {
		notice( t('Permission denied.') . EOL);
		return;
	}

	$acl = new AccessList($channel);
	$channel_acl = $acl->get();

	$lockstate = (($acl->is_private()) ? 'lock' : 'unlock');

	$thing_hash = '';

	if(argc() == 3 && argv(1) === 'edit') {
		$thing_hash = argv(2);

		$r = q("select * from obj where obj_type = %d and obj_obj = '%s' limit 1",
			intval(TERM_OBJ_THING),
			dbesc($thing_hash)
		);

		if((! $r) || ($r[0]['obj_channel'] != local_channel())) {
			notice( t('Permission denied.') . EOL);
			return '';
		}

		$o .= replace_macros(get_markup_template('thing_edit.tpl'),array(
			'$thing_hdr' => t('Edit Thing'),
			'$multiprof' => feature_enabled(local_channel(),'multi_profiles'),
			'$profile_lbl' => t('Select a profile'),
			'$profile_select' => contact_profile_assign($r[0]['obj_page']),
			'$verb_lbl' => $channel['channel_name'],
			'$verb_select' => obj_verb_selector($r[0]['obj_verb']),
			'$activity' => array('activity',t('Post an activity'),true,t('Only sends to viewers of the applicable profile')),
			'$thing_hash' => $thing_hash,
			'$thing_lbl' => t('Name of thing e.g. something'),
			'$thething' => $r[0]['obj_term'],
			'$url_lbl' => t('URL of thing (optional)'),
			'$theurl' => $r[0]['obj_url'],
			'$img_lbl' => t('URL for photo of thing (optional)'),
			'$imgurl' => $r[0]['obj_imgurl'],
			'$permissions' => t('Permissions'),
			'$aclselect' => populate_acl($channel_acl,false),
			'$lockstate' => $lockstate,
			'$submit' => t('Submit')
		));

		return $o;
	}

	if(argc() == 3 && argv(1) === 'drop') {
		$thing_hash = argv(2);

		$r = q("select * from obj where obj_type = %d and obj_obj = '%s' limit 1",
			intval(TERM_OBJ_THING),
			dbesc($thing_hash)
		);

		if((! $r) || ($r[0]['obj_channel'] != local_channel())) {
			notice( t('Permission denied.') . EOL);
			return '';
		}

		$x = q("delete from obj where obj_obj = '%s' and obj_type = %d and obj_channel = %d",
			dbesc($thing_hash),
			intval(TERM_OBJ_THING),
			intval(local_channel())
		);

		$r[0]['obj_deleted'] = 1;

		build_sync_packet(0,array('obj' => $r));

		return $o;
	}

	$o .= replace_macros(get_markup_template('thing_input.tpl'),array(
		'$thing_hdr' => t('Add Thing to your Profile'),
		'$multiprof' => feature_enabled(local_channel(),'multi_profiles'),
		'$profile_lbl' => t('Select a profile'),
		'$profile_select' => contact_profile_assign(''),
		'$verb_lbl' => $channel['channel_name'],
		'$activity' => array('activity',t('Post an activity'),((array_key_exists('activity',$_REQUEST)) ? $_REQUEST['activity'] : true),t('Only sends to viewers of the applicable profile')),
		'$verb_select' => obj_verb_selector(),
		'$thing_lbl' => t('Name of thing e.g. something'),
		'$url_lbl' => t('URL of thing (optional)'),
		'$img_lbl' => t('URL for photo of thing (optional)'),
		'$permissions' => t('Permissions'),
		'$aclselect' => populate_acl($channel_acl,false),
		'$lockstate' => $lockstate,
		'$submit' => t('Submit')
	));

	return $o;
}
