<?php

namespace Zotlabs\Module;

use App;
use Zotlabs\Lib\Apps;
use Zotlabs\Lib\Config;
use Zotlabs\Web\Controller;
use Zotlabs\Lib\Enotify;
use Zotlabs\Lib\XConfig;
use Zotlabs\Lib\Cache;

class Sse_bs extends Controller {

	public static $uid;
	public static $ob_hash;
	public static $sse_id;
	public static $vnotify;
	public static $evdays;
	public static $limit;
	public static $offset;
	public static $xchans;

	function init() {

		self::$uid = local_channel();
		self::$ob_hash = get_observer_hash();
		self::$sse_id = false;

		if(! self::$ob_hash) {
			if(session_id()) {
				self::$sse_id = true;
				self::$ob_hash = 'sse_id.' . session_id();
			}
			else {
				return;
			}
		}

		self::$vnotify = get_pconfig(self::$uid, 'system', 'vnotify', -1);
		self::$evdays = intval(get_pconfig(self::$uid, 'system', 'evdays'));
		self::$limit = 30;
		self::$offset = 0;
		self::$xchans = '';

		if(isset($_REQUEST['sse_rmids']))
			self::mark_read($_REQUEST['sse_rmids']);

		if(!empty($_REQUEST['nquery']) && $_REQUEST['nquery'] !== '%') {
			$nquery = $_REQUEST['nquery'];

			$x = q("SELECT xchan_hash FROM xchan WHERE xchan_name LIKE '%s' OR xchan_addr LIKE '%s'",
				dbesc($nquery . '%'),
				dbesc($nquery . '%')
			);

			self::$xchans = ids_to_querystr($x, 'xchan_hash', true);
		}

		if(intval(argv(2)) > 0) {
			self::$offset = argv(2);
		}
		else {
			$_SESSION['sse_loadtime'] = datetime_convert();
		}


		$network = false;
		$dm = false;
		$home = false;
		$pubs = false;
		$f = '';

		switch (argv(1)) {
			case 'network':
				$network = true;
				$f = 'bs_network';
				break;
			case 'dm':
				$dm = true;
				$f = 'bs_dm';
				break;
			case 'home':
				$home = true;
				$f = 'bs_home';
				break;
			case 'pubs':
				$pubs = true;
				$f = 'bs_pubs';
				break;
			default:
		}

		if(self::$offset && $f) {
			$result = self::$f(true);
			json_return_and_die($result);
		}

		$result = array_merge(
			self::bs_network($network),
			self::bs_dm($dm),
			self::bs_home($home),
			self::bs_notify(),
			self::bs_intros(),
			self::bs_forums(),
			self::bs_pubs($pubs),
			self::bs_files(),
			self::bs_all_events(),
			self::bs_register(),
			self::bs_info_notice()
		);

		XConfig::Set(self::$ob_hash, 'sse', 'notifications', []);
		XConfig::Set(self::$ob_hash, 'sse', 'timestamp', datetime_convert());
		XConfig::Set(self::$ob_hash, 'sse', 'language', App::$language);

		json_return_and_die($result);
	}

	function mark_read($arr) {

		$mids = [];
		$str = '';
		$slice = 0;

		$mids_all = isset($_SESSION['sse_mids_all']) ? unserialise($_SESSION['sse_mids_all']) : [];

		if (count($mids_all) > 3000) {
			$slice = count($mids_all) - 3000;
		}

		if ($slice) {
			$mids_all = array_slice($mids_all, $slice);
		}

		foreach($arr as $a) {
			$mid_str = '\'' . dbesc(unpack_link_id($a)) . '\'';
			$mids[] = $mid_str;

			if (!in_array($mid_str, $mids_all)) {
				$mids_all[] = $mid_str;
			}
		}

		$_SESSION['sse_mids_all'] = serialise($mids_all);

		if(! self::$uid) {
			return;
		}

		$str = implode(',', $mids);

		$x = [ 'channel_id' => self::$uid, 'update' => 'unset' ];
		call_hooks('update_unseen',$x);

		if($x['update'] === 'unset' || intval($x['update'])) {
			q("UPDATE item SET item_unseen = 0 WHERE uid = %d AND uuid in (%s) AND item_unseen = 1",
				intval(self::$uid),
				$str // this is dbesc() in the above foreach loop
			);
		}

	}

	function bs_network($notifications) {

		$result['network']['notifications'] = [];
		$result['network']['count'] = 0;

		if(! self::$uid) {
			$result['network']['offset'] = -1;
			return $result;
		}

		if(! (self::$vnotify & VNOTIFY_NETWORK)) {
			$result['network']['offset'] = -1;
			return $result;
		}

		$limit = intval(self::$limit);
		$offset = self::$offset;

		$sql_extra = '';
		if (!(self::$vnotify & VNOTIFY_LIKE)) {
			$sql_extra = " AND verb NOT IN ('Like', 'Dislike', '" . dbesc(ACTIVITY_LIKE) . "', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}
		elseif (!feature_enabled(self::$uid, 'dislike')) {
			$sql_extra = " AND verb NOT IN ('Dislike', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}

		$sql_extra2 = '';
		if(self::$xchans)
			$sql_extra2 = " AND CASE WHEN verb = '" . dbesc(ACTIVITY_SHARE) . "' THEN owner_xchan ELSE author_xchan END IN (" . self::$xchans . ") ";

		$item_normal = item_normal();

		// Filter internal follow activities and strerams add/remove activities
		$item_normal .= " AND verb NOT IN ('Add', 'Remove', 'Follow', 'Ignore', '" . dbesc(ACTIVITY_FOLLOW) . "') ";

		if ($notifications) {
			$items = q("SELECT * FROM item
				WHERE uid = %d
				AND created <= '%s'
				AND item_unseen = 1 AND item_wall = 0 AND item_private IN (0, 1)
				AND obj_type NOT IN ('Document', 'Video', 'Audio', 'Image')
				AND author_xchan != '%s'
				$item_normal
				$sql_extra
				$sql_extra2
				ORDER BY created DESC LIMIT $limit OFFSET $offset",
				intval(self::$uid),
				dbescdate($_SESSION['sse_loadtime']),
				dbesc(self::$ob_hash)
			);

			if($items) {
				$result['network']['offset'] = ((count($items) == $limit) ? intval($offset + $limit) : -1);
				xchan_query($items);
				foreach($items as $item) {
					$parsed = Enotify::format($item);
					if($parsed) {
						$result['network']['notifications'][] = $parsed;
					}
				}
			}
			else {
				$result['network']['offset'] = -1;
			}

		}

		$r = q("SELECT id FROM item
			WHERE uid = %d and item_unseen = 1 AND item_wall = 0 AND item_private IN (0, 1)
			AND obj_type NOT IN ('Document', 'Video', 'Audio', 'Image')
			AND author_xchan != '%s'
			$item_normal
			$sql_extra LIMIT 100",
			intval(self::$uid),
			dbesc(self::$ob_hash)
		);

		if($r)
			$result['network']['count'] = count($r);

		return $result;
	}

	function bs_dm($notifications) {

		$result['dm']['notifications'] = [];
		$result['dm']['count'] = 0;

		if(! self::$uid) {
			$result['dm']['offset'] = -1;
			return $result;
		}

		if(! (self::$vnotify & VNOTIFY_MAIL)) {
			$result['dm']['offset'] = -1;
			return $result;
		}

		$limit = intval(self::$limit);
		$offset = self::$offset;

		$sql_extra = '';
		if (!(self::$vnotify & VNOTIFY_LIKE)) {
			$sql_extra = " AND verb NOT IN ('Like', 'Dislike', '" . dbesc(ACTIVITY_LIKE) . "', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}
		elseif (!feature_enabled(self::$uid, 'dislike')) {
			$sql_extra = " AND verb NOT IN ('Dislike', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}

		$sql_extra2 = '';
		if(self::$xchans)
			$sql_extra2 = " AND CASE WHEN verb = '" . ACTIVITY_SHARE . "' THEN owner_xchan ELSE author_xchan END IN (" . self::$xchans . ") ";

		$item_normal = item_normal();

		// Filter internal follow activities and strerams add/remove activities
		$item_normal .= " AND verb NOT IN ('Add', 'Remove', 'Follow', 'Ignore', '" . dbesc(ACTIVITY_FOLLOW) . "') ";

		if ($notifications) {
			$items = q("SELECT * FROM item
				WHERE uid = %d
				AND created <= '%s'
				AND item_unseen = 1 AND item_private = 2
				AND obj_type NOT IN ('Document', 'Video', 'Audio', 'Image')
				AND author_xchan != '%s'
				$item_normal
				$sql_extra
				$sql_extra2
				ORDER BY created DESC LIMIT $limit OFFSET $offset",
				intval(self::$uid),
				dbescdate($_SESSION['sse_loadtime']),
				dbesc(self::$ob_hash)
			);

			if($items) {
				$result['dm']['offset'] = ((count($items) == $limit) ? intval($offset + $limit) : -1);
				xchan_query($items);
				foreach($items as $item) {
					$parsed = Enotify::format($item);
					if($parsed) {
						$result['dm']['notifications'][] = $parsed;
					}
				}
			}
			else {
				$result['dm']['offset'] = -1;
			}

		}

		$r = q("SELECT id FROM item
			WHERE uid = %d and item_unseen = 1 AND item_private = 2
			$item_normal
			$sql_extra
			AND author_xchan != '%s' LIMIT 100",
			intval(self::$uid),
			dbesc(self::$ob_hash)
		);

		if($r)
			$result['dm']['count'] = count($r);

		return $result;
	}

	function bs_home($notifications) {

		$result['home']['notifications'] = [];
		$result['home']['count'] = 0;

		if(! self::$uid) {
			$result['home']['offset'] = -1;
			return $result;
		}

		if(! (self::$vnotify & VNOTIFY_CHANNEL)) {
			$result['home']['offset'] = -1;
			return $result;
		}

		$limit = intval(self::$limit);
		$offset = self::$offset;

		$sql_extra = '';
		if (!(self::$vnotify & VNOTIFY_LIKE)) {
			$sql_extra = " AND verb NOT IN ('Like', 'Dislike', '" . dbesc(ACTIVITY_LIKE) . "', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}
		elseif (!feature_enabled(self::$uid, 'dislike')) {
			$sql_extra = " AND verb NOT IN ('Dislike', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}

		$sql_extra2 = '';
		if(self::$xchans)
			$sql_extra2 = " AND CASE WHEN verb = '" . ACTIVITY_SHARE . "' THEN owner_xchan ELSE author_xchan END IN (" . self::$xchans . ") ";


		$item_normal = item_normal();

		// Filter internal follow activities and strerams add/remove activities
		$item_normal .= " AND verb NOT IN ('Add', 'Remove', 'Follow', 'Ignore', '" . dbesc(ACTIVITY_FOLLOW) . "') ";

		if ($notifications) {
			$items = q("SELECT * FROM item
				WHERE uid = %d
				AND created <= '%s'
				AND item_unseen = 1 AND item_wall = 1 AND item_private IN (0, 1)
				AND obj_type NOT IN ('Document', 'Video', 'Audio', 'Image')
				AND author_xchan != '%s'
				$item_normal
				$sql_extra
				$sql_extra2
				ORDER BY created DESC LIMIT $limit OFFSET $offset",
				intval(self::$uid),
				dbescdate($_SESSION['sse_loadtime']),
				dbesc(self::$ob_hash)
			);

			if($items) {
				$result['home']['offset'] = ((count($items) == $limit) ? intval($offset + $limit) : -1);
				xchan_query($items);
				foreach($items as $item) {
					$parsed = Enotify::format($item);
					if($parsed) {
						$result['home']['notifications'][] = $parsed;
					}
				}
			}
			else {
				$result['home']['offset'] = -1;
			}

		}

		$r = q("SELECT id FROM item
			WHERE uid = %d and item_unseen = 1 AND item_wall = 1 AND item_private IN (0, 1)
			$item_normal
			$sql_extra
			AND author_xchan != '%s' LIMIT 100",
			intval(self::$uid),
			dbesc(self::$ob_hash)
		);

		if($r)
			$result['home']['count'] = count($r);

		return $result;
	}

	function bs_pubs($notifications) {

		$result['pubs']['notifications'] = [];
		$result['pubs']['count'] = 0;

		if(! (self::$vnotify & VNOTIFY_PUBS) || !Apps::system_app_installed(self::$uid, 'Public Stream')) {
			$result['pubs']['offset'] = -1;
			return $result;
		}

		if((observer_prohibited(true))) {
			$result['pubs']['offset'] = -1;
			return $result;
		}

		if(! intval(Config::Get('system','open_pubstream',1))) {
			if(! get_observer_hash()) {
				$result['pubs']['offset'] = -1;
				return $result;
			}
		}

		if(!isset($_SESSION['static_loadtime'])) {
			$_SESSION['static_loadtime'] = datetime_convert();
		}

		$limit = intval(self::$limit);
		$offset = self::$offset;

		$sys = get_sys_channel();
		$sql_extra = '';
		if (!(self::$vnotify & VNOTIFY_LIKE)) {
			$sql_extra = " AND verb NOT IN ('Like', 'Dislike', '" . dbesc(ACTIVITY_LIKE) . "', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}
		elseif (!feature_enabled(self::$uid, 'dislike')) {
			$sql_extra = " AND verb NOT IN ('Dislike', '" . dbesc(ACTIVITY_DISLIKE) . "') ";
		}

		$sql_extra2 = '';
		if(self::$xchans)
			$sql_extra2 = " AND CASE WHEN verb = '" . ACTIVITY_SHARE . "' THEN owner_xchan ELSE author_xchan END IN (" . self::$xchans . ") ";

		$sql_extra3 = '';
		$sse_mids_all = unserialise($_SESSION['sse_mids_all']) ?? [];
		if ($sse_mids_all) {
			$sql_extra3 = " AND uuid NOT IN (" . protect_sprintf(implode(',', $sse_mids_all)) . ") ";
		}

		$uids = " AND uid IN ( " . $sys['channel_id'] . " ) ";

		$site_firehose = Config::Get('system', 'site_firehose', 0);
		if($site_firehose) {
			$uids = " AND uid IN ( " . stream_perms_api_uids(PERMS_PUBLIC) . " ) AND item_private = 0 AND item_wall = 1 ";
		}

		$item_normal = item_normal();

		// Filter internal follow activities and strerams add/remove activities
		$item_normal .= " AND verb NOT IN ('Add', 'Remove', 'Follow', 'Ignore', '" . dbesc(ACTIVITY_FOLLOW) . "') ";

		if ($notifications) {
			$items = q("SELECT * FROM item
				WHERE true $uids
				AND created <= '%s'
				AND obj_type NOT IN ('Document', 'Video', 'Audio', 'Image')
				AND author_xchan != '%s'
				AND created > '%s'
				$item_normal
				$sql_extra
				$sql_extra2
				$sql_extra3
				ORDER BY created DESC LIMIT $limit OFFSET $offset",
				dbescdate($_SESSION['sse_loadtime']),
				dbesc(self::$ob_hash),
				dbescdate($_SESSION['last_login_date'] ?? $_SESSION['static_loadtime'])
			);

			if($items) {
				$result['pubs']['offset'] = ((count($items) == $limit) ? intval($offset + $limit) : -1);
				xchan_query($items);
				foreach($items as $item) {
					$parsed = Enotify::format($item);
					if($parsed) {
						$result['pubs']['notifications'][] = $parsed;
					}
				}
			}
			else {
				$result['pubs']['offset'] = -1;
			}
		}

		$r = q("SELECT id FROM item
			WHERE true $uids
			AND created > '%s'
			$item_normal
			$sql_extra
			$sql_extra3
			AND author_xchan != '%s' LIMIT 100",
			dbescdate($_SESSION['last_login_date'] ?? $_SESSION['static_loadtime']),
			dbesc(self::$ob_hash)
		);

		if($r)
			$result['pubs']['count'] = count($r);

		return $result;
	}


	function bs_notify() {

		$result['notify']['notifications'] = [];
		$result['notify']['count'] = 0;
		$result['notify']['offset'] = -1;

		if(! self::$uid)
			return $result;

		if(! (self::$vnotify & VNOTIFY_SYSTEM))
			return $result;

		$r = q("SELECT * FROM notify WHERE uid = %d AND seen = 0 ORDER BY created DESC",
			intval(self::$uid)
		);

		if($r) {
			foreach($r as $rr) {
				$result['notify']['notifications'][] = Enotify::format_notify($rr);
			}
			$result['notify']['count'] = count($r);
		}

		return $result;

	}

	function bs_intros() {

		$result['intros']['notifications'] = [];
		$result['intros']['count'] = 0;
		$result['intros']['offset'] = -1;

		if(! self::$uid)
			return $result;

		if(! (self::$vnotify & VNOTIFY_INTRO))
			return $result;

		$r = q("SELECT * FROM abook left join xchan on abook.abook_xchan = xchan.xchan_hash where abook_channel = %d and abook_pending = 1 and abook_self = 0 and abook_ignored = 0 and xchan_deleted = 0 and xchan_orphan = 0 ORDER BY abook_created DESC LIMIT 50",
			intval(self::$uid)
		);

		if($r) {
			foreach($r as $rr) {
				$result['intros']['notifications'][] = Enotify::format_intros($rr);
			}
			$result['intros']['count'] = count($r);
		}

		return $result;

	}

	function bs_forums() {

		$result['forums']['notifications'] = [];
		$result['forums']['count'] = 0;
		$result['forums']['offset'] = -1;

		if(! self::$uid)
			return $result;

		if(! (self::$vnotify & VNOTIFY_FORUMS))
			return $result;

		$forums = get_forum_channels(self::$uid);

		if($forums) {
			$item_normal = item_normal();

			$sql_extra = '';
			if(! (self::$vnotify & VNOTIFY_LIKE))
				$sql_extra = " AND verb NOT IN ('Like', 'Dislike', '" . dbesc(ACTIVITY_LIKE) . "', '" . dbesc(ACTIVITY_DISLIKE) . "') ";

			$fcount = count($forums);
			$i = 0;

			for($x = 0; $x < $fcount; $x ++) {
				$p = q("SELECT oid AS parent FROM term WHERE uid = %d AND ttype = %d AND term = '%s'",
					intval(self::$uid),
					intval(TERM_FORUM),
					dbesc($forums[$x]['xchan_name'])
				);

				$p_str = ids_to_querystr($p, 'parent');
				$p_sql = (($p_str) ? "OR parent IN ( $p_str )" : '');

				$r = q("select count(*) as total from item
					where uid = %d and ( owner_xchan = '%s' OR author_xchan = '%s' $p_sql ) and item_unseen = 1 $sql_extra $item_normal",
					intval(self::$uid),
					dbesc($forums[$x]['xchan_hash']),
					dbesc($forums[$x]['xchan_hash'])
				);

				if($r[0]['total']) {

					$forums[$x]['notify_link'] = z_root() . '/network/?f=&pf=1&unseen=1&cid=' . $forums[$x]['abook_id'];
					$forums[$x]['name'] = $forums[$x]['xchan_name'];
					$forums[$x]['addr'] = $forums[$x]['xchan_addr'] ?? $forums[$x]['xchan_url'];
					$forums[$x]['url'] = $forums[$x]['xchan_url'];
					$forums[$x]['photo'] = $forums[$x]['xchan_photo_s'];
					$forums[$x]['unseen'] = $r[0]['total'];
					$forums[$x]['private_forum'] = ((isset($forums[$x]['private_forum']) && $forums[$x]['private_forum']) ? 'lock' : '');
					$forums[$x]['message'] = ((isset($forums[$x]['private_forum']) && $forums[$x]['private_forum']) ? t('Private forum') : t('Public forum'));

					unset($forums[$x]['abook_id']);
					unset($forums[$x]['xchan_hash']);
					unset($forums[$x]['xchan_name']);
					unset($forums[$x]['xchan_url']);
					unset($forums[$x]['xchan_photo_s']);

					$i = $i + $r[0]['total'];

				}
				else {
					unset($forums[$x]);
				}
			}

			$result['forums']['count'] = $i;
			$result['forums']['notifications'] = array_values($forums);

		}

		return $result;

	}

	function bs_files() {

		$result['files']['notifications'] = [];
		$result['files']['count'] = 0;
		$result['files']['offset'] = -1;

		if(! self::$uid)
			return $result;

		if(! (self::$vnotify & VNOTIFY_FILES))
			return $result;

		$item_normal = item_normal();

		// Filter internal follow activities and strerams add/remove activities
		$item_normal .= " AND verb NOT IN ('Add', 'Remove', 'Follow', 'Ignore', '" . dbesc(ACTIVITY_FOLLOW) . "') ";

		$r = q("SELECT * FROM item
			WHERE (verb = 'Create' OR verb = '%s')
			AND obj_type IN ('Document', 'Video', 'Audio', 'Image')
			AND uid = %d
			AND author_xchan != '%s'
			AND item_unseen = 1
			$item_normal
			ORDER BY created DESC",
			dbesc(ACTIVITY_POST),
			intval(self::$uid),
			dbesc(self::$ob_hash)
		);
		if($r) {
			xchan_query($r);
			foreach($r as $rr) {
					$parsed = Enotify::format($rr);
					if($parsed) {
						$result['files']['notifications'][] = $parsed;
					}
			}
			$result['files']['count'] = count($r);
		}

		return $result;

	}

	function bs_all_events() {

		$result['all_events']['notifications'] = [];
		$result['all_events']['count'] = 0;
		$result['all_events']['offset'] = -1;

		if(! self::$uid)
			return $result;

		if(! (self::$vnotify & VNOTIFY_EVENT))
			return $result;

		$r = q("SELECT * FROM event left join xchan on event_xchan = xchan_hash
			WHERE event.uid = %d AND dtstart < '%s' AND dtstart > '%s' and dismissed = 0
			and etype in ( 'event', 'birthday' )
			ORDER BY dtstart DESC",
			intval(self::$uid),
			dbesc(datetime_convert('UTC', date_default_timezone_get(), 'now + ' . intval(self::$evdays) . ' days')),
			dbesc(datetime_convert('UTC', date_default_timezone_get(), 'now - 1 days'))
		);

		if($r) {
			foreach($r as $rr) {
				$result['all_events']['notifications'][] = Enotify::format_all_events($rr);
			}
			$result['all_events']['count'] = count($r);
		}

		return $result;
	}

	function bs_register() {

		$result['register']['notifications'] = [];
		$result['register']['count'] = 0;
		$result['register']['offset'] = -1;

		if(! self::$uid && ! is_site_admin())
			return $result;

		$policy  = intval(Config::Get('system','register_policy'));
		if(($policy & REGISTER_APPROVE) != REGISTER_APPROVE)
			return $result;

		if(! (self::$vnotify & VNOTIFY_REGISTER))
			return $result;

		$r = get_pending_accounts();

		if($r) {
			foreach($r as $rr) {
				$result['register']['notifications'][] = Enotify::format_register($rr);
			}
			$result['register']['count'] = count($r);
		}

		return $result;

	}

	function bs_info_notice() {

		$result['notice']['notifications'] = [];
		$result['info']['notifications'] = [];

		$r = XConfig::Get(self::$ob_hash, 'sse', 'notifications', []);

		if(isset($r['notice']))
			$result['notice']['notifications'] = $r['notice']['notifications'];

		if(isset($r['info']))
			$result['info']['notifications'] = $r['info']['notifications'];

		return $result;

	}


}