<?php

use Zotlabs\Lib\Crypto;
use Zotlabs\Web\HTTPSig;
use Zotlabs\Lib\Libzot;


function xchan_store_lowlevel($arr) {

	if(! $arr['xchan_hash']) {
		logger('No xchan_hash');
		return false;
	}

	$store = [
		'xchan_hash' => ((array_key_exists('xchan_hash',$arr)) ? $arr['xchan_hash'] : ''),
		'xchan_guid' => ((array_key_exists('xchan_guid',$arr)) ? $arr['xchan_guid'] : ''),
		'xchan_guid_sig' => ((array_key_exists('xchan_guid_sig',$arr)) ? $arr['xchan_guid_sig'] : ''),
		'xchan_pubkey' => ((array_key_exists('xchan_pubkey',$arr)) ? $arr['xchan_pubkey'] : ''),
		'xchan_epubkey' => ((array_key_exists('xchan_epubkey',$arr)) ? $arr['xchan_epubkey'] : ''),
		'xchan_photo_mimetype'  => ((array_key_exists('xchan_photo_mimetype',$arr)) ? $arr['xchan_photo_mimetype'] : ''),
		'xchan_photo_l'  => ((array_key_exists('xchan_photo_l',$arr)) ? $arr['xchan_photo_l'] : ''),
		'xchan_photo_m' => ((array_key_exists('xchan_photo_m',$arr)) ? $arr['xchan_photo_m'] : ''),
		'xchan_photo_s' => ((array_key_exists('xchan_photo_s',$arr)) ? $arr['xchan_photo_s'] : ''),
		'xchan_addr' => ((array_key_exists('xchan_addr',$arr)) ? $arr['xchan_addr'] : ''),
		'xchan_url' => ((array_key_exists('xchan_url',$arr)) ? $arr['xchan_url'] : ''),
		'xchan_connurl' => ((array_key_exists('xchan_connurl',$arr)) ? $arr['xchan_connurl'] : ''),
		'xchan_follow' => ((array_key_exists('xchan_follow',$arr)) ? $arr['xchan_follow'] : ''),
		'xchan_connpage' => ((array_key_exists('xchan_connpage',$arr)) ? $arr['xchan_connpage'] : ''),
		'xchan_name' => ((array_key_exists('xchan_name',$arr)) ? sanitize_text_field($arr['xchan_name']) : ''),
		'xchan_network' => ((array_key_exists('xchan_network',$arr)) ? $arr['xchan_network'] : ''),
		'xchan_instance_url' => ((array_key_exists('xchan_instance_url',$arr)) ? $arr['xchan_instance_url'] : ''),
		'xchan_flags' => ((array_key_exists('xchan_flags',$arr)) ? intval($arr['xchan_flags']) : 0),
		'xchan_photo_date' => ((array_key_exists('xchan_photo_date',$arr)) ? datetime_convert('UTC','UTC',$arr['xchan_photo_date']) : NULL_DATE),
		'xchan_name_date' => ((array_key_exists('xchan_name_date',$arr)) ? datetime_convert('UTC','UTC',$arr['xchan_name_date']) : NULL_DATE),
		'xchan_updated' => ((array_key_exists('xchan_updated',$arr)) ? datetime_convert('UTC','UTC',$arr['xchan_updated']) : NULL_DATE),
		'xchan_hidden' => ((array_key_exists('xchan_hidden',$arr)) ? intval($arr['xchan_hidden']) : 0),
		'xchan_orphan' => ((array_key_exists('xchan_orphan',$arr)) ? intval($arr['xchan_orphan']) : 0),
		'xchan_censored' => ((array_key_exists('xchan_censored',$arr)) ? intval($arr['xchan_censored']) : 0),
		'xchan_selfcensored' => ((array_key_exists('xchan_selfcensored',$arr)) ? intval($arr['xchan_selfcensored']) : 0),
		'xchan_system' => ((array_key_exists('xchan_system',$arr)) ? intval($arr['xchan_system']) : 0),
		'xchan_pubforum' => ((array_key_exists('xchan_pubforum',$arr)) ? intval($arr['xchan_pubforum']) : 0),
		'xchan_deleted' => ((array_key_exists('xchan_deleted',$arr)) ? intval($arr['xchan_deleted']) : 0)
	];

	return create_table_from_array('xchan',$store);
}


function xchan_store($arr) {

	$update_photo = false;
	$update_name = false;

	if(! ($arr['guid'] || $arr['hash'])) {
		$arr = json_decode(file_get_contents('php://input'),true);
	}

	logger('xchan_store: ' . print_r($arr,true));

	if(! $arr['hash'])
		$arr['hash'] = $arr['guid'];
	if(! $arr['hash'])
		return false;

	$r = q("select * from xchan where xchan_hash = '%s' limit 1",
		dbesc($arr['hash'])
	);
	if(! $r) {

		$update_photo = true;

		if(! $arr['network'])
			$arr['network'] = 'unknown';
		if(! $arr['name'])
			$arr['name'] = 'unknown';
		if(! $arr['url'])
			$arr['url'] = z_root();
		if(! $arr['photo'])
			$arr['photo'] = z_root() . '/' . get_default_profile_photo();

		if($arr['network'] === 'zot6') {
			if((! $arr['key']) || (! Libzot::verify($arr['id'],$arr['id_sig'],$arr['key']))) {
				logger('Unable to verify signature for ' . $arr['hash']);
				return false;
			}
		}

		$columns = db_columns('xchan');

		$x = [];
		foreach($arr as $k => $v) {
			if($k === 'key') {
				$x['xchan_pubkey'] = HTTPSig::convertKey(escape_tags($v));;
				continue;
			}
			if($k === 'photo') {
				continue;
			}

			if(in_array($columns,'xchan_' . $k))
				$x['xchan_' . $k] = escape_tags($v);
		}

		$x['xchan_name_date'] = datetime_convert();
		$x['xchan_photo_date'] = datetime_convert();
		$x['xchan_system']     = false;

		$result = xchan_store_lowlevel($x);

		if(! $result)
			return $result;
	}
	else {
		if($r[0]['network'] === 'zot6') {
			return true;
		}
		if($r[0]['xchan_photo_date'] < datetime_convert('UTC','UTC',$arr['photo_date'])) {
			$update_photo = true;
		}
		if($r[0]['xchan_name_date'] < datetime_convert('UTC','UTC',$arr['name_date'])) {
			$update_name = true;
		}
    }

	if($update_photo && $arr['photo']) {
		$photos = import_xchan_photo($arr['photo'],$arr['hash']);
		$r = q("update xchan set xchan_photo_date = '%s', xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s' where xchan_hash = '%s'",
			dbesc(datetime_convert()),
			dbesc($photos[0]),
			dbesc($photos[1]),
			dbesc($photos[2]),
			dbesc($photos[3]),
			dbesc($arr['hash'])
		);
	}
	if($update_name && $arr['name']) {
		$x = q("update xchan set xchan_name = '%s', xchan_name_date = '%s' where xchan_hash = '%s'",
			dbesc(escape_tags($arr['name'])),
			dbesc(datetime_convert()),
			dbesc($arr['hash'])
		);
	}

	return true;
}


function xchan_fetch($arr) {

	$key = '';
	if(isset($arr['hash']) && $arr['hash']) {
		$key = 'xchan_hash';
		$v = $arr['hash'];
	}
	elseif(isset($arr['guid']) && $arr['guid']) {
		$key = 'xchan_guid';
		$v = $arr['guid'];
	}
	elseif(isset($arr['address']) && $arr['address']) {
		$key = 'xchan_addr';
		$v = $arr['address'];
	}

	if(! $key)
		return false;

	$r = q("select * from xchan where $key = '$v' limit 1");
	if(! $r)
		return false;

	$ret = array();
	foreach($r[0] as $k => $v) {
		if($k === 'xchan_addr')
			$ret['address'] = $v;
		else
			$ret[str_replace('xchan_','',$k)] = $v;
	}
	return $ret;
}


function xchan_keychange_table($table,$column,$oldxchan,$newxchan) {
	$r = q("update $table set $column = '%s' where $column = '%s'",
		dbesc($newxchan['xchan_hash']),
		dbesc($oldxchan['xchan_hash'])
	);
	return $r;
}

function xchan_keychange_acl($table,$column,$oldxchan,$newxchan) {

	$allow = (($table === 'channel') ? 'channel_allow_cid' : 'allow_cid');
	$deny  = (($table === 'channel') ? 'channel_deny_cid'  : 'deny_cid');


	$r = q("select $column, $allow, $deny from $table where ($allow like '%s' or $deny like '%s') ",
		dbesc('<' . $oldxchan['xchan_hash'] . '>'),
		dbesc('<' . $oldxchan['xchan_hash'] . '>')
	);

	if($r) {
		foreach($r as $rv) {
			$z = q("update $table set $allow = '%s', $deny = '%s' where $column = %d",
				dbesc(str_replace('<' . $oldxchan['xchan_hash'] . '>', '<' . $newxchan['xchan_hash'] . '>',
					$rv[$allow])),
				dbesc(str_replace('<' . $oldxchan['xchan_hash'] . '>', '<' . $newxchan['xchan_hash'] . '>',
					$rv[$deny])),
				intval($rv[$column])
			);
		}
	}
	return $z;
}


function xchan_change_key($oldx,$newx,$data) {

	// TODO: this will need a refactor to eliminate duplicate keys
	// E.G. item => [author_xchan, owner_xchan, source_kchan]
	// Also: add a test!

	$tables = [
		'abook'        => 'abook_xchan',
		'abconfig'     => 'xchan',
		'pgrp_member' => 'xchan',
		'chat'         => 'chat_xchan',
		'chatpresence' => 'cp_xchan',
		'event'        => 'event_xchan',
		'item'         => 'owner_xchan',
		'item'         => 'author_xchan',
		'item'         => 'source_xchan',
		'shares'       => 'share_xchan',
		'source'       => 'src_channel_xchan',
		'source'       => 'src_xchan',
		'xchat'        => 'xchat_xchan',
		'xconfig'      => 'xchan',
		'xign'         => 'xchan',
		'xlink'        => 'xlink_xchan',
		'xprof'        => 'xprof_hash',
		'xtag'         => 'xtag_hash'
	];


	$acls = [
		'channel'   => 'channel_id',
		'attach'    => 'id',
		'chatroom'  => 'cr_id',
		'event'     => 'id',
		'item'      => 'id',
		'menu_item' => 'mitem_id',
		'obj'       => 'obj_id',
		'photo'     => 'id'
	];


	foreach($tables as $k => $v) {
		xchan_keychange_table($k,$v,$oldx,$newx);
	}

	foreach($acls as $k => $v) {
		xchan_keychange_acl($k,$v,$oldx,$newx);
	}
}