<?php

require_once('../config.php');
require_once('../library/icon.php');
require_once('../library/sqlite.php');

$query = isset($_GET['q'])  ? preg_replace('/[^\w\s]+/u',     '', $_GET['q'])  : '';
$ns    = isset($_GET['ns']) ? preg_replace('/[^a-zA-Z0-9]+/', '', $_GET['ns']) : '';
$tx    = isset($_GET['tx']) ? preg_replace('/[^a-zA-Z0-9]+/', '', $_GET['tx']) : '';
$page  = (int) isset($_GET['page']) ? $_GET['page'] : 0;
$rss   = isset($_GET['rss']) ? true : false;

if (isset($_SERVER['QUERY_STRING'])) {

  $q = explode('/', $_SERVER['QUERY_STRING']);

  if (isset($q[1])) {
    if ($q[1] == 'rss') {
      $rss = true;
    } else if (strlen($q[1]) == 34) {
      $ns = preg_replace('/[^a-zA-Z0-9]+/', '', $q[1]);
    } else if (strlen($q[1]) > 34) {
      $tx = preg_replace('/[^a-zA-Z0-9]+/', '', $q[1]);
    } else {
      $page = (int) $q[1];
    }
  }

  if (isset($q[2])) {
    if ($q[2] == 'rss') {
      $rss = true;
    } else if (strlen($q[2]) == 34) {
      $ns = preg_replace('/[^a-zA-Z0-9]+/', '', $q[2]);
    } else {
      $page = (int) $q[2];
    }
  }
}

if ($page > 0) {
  $limit = PAGE_LIMIT * $page - PAGE_LIMIT;
} else {
  $limit = PAGE_LIMIT * $page;
}

$db = new SQLite(DB_NAME, DB_USERNAME, DB_PASSWORD);

if ($ns) {

  $namespaceHash  = $ns;
  $namespaceValue = $db->getNamespaceValueByNS($ns);

} else if ($tx) {

  $namespaceHash  = $db->getNamespaceHashByTX($tx);
  $namespaceValue = $db->getNamespaceValueByNS($namespaceHash);

} else {

  $namespaceHash  = false;
  $namespaceValue = false;
}

$trends = [];

if (TRENDS_ENABLED) {

  foreach ($db->getTrends(time() - TRENDS_SECONDS_OFFSET) as $value) {

    foreach ((array) explode(' ', strip_tags(html_entity_decode(nl2br(trim($value['key']))))) as $trend) {

      if (strlen($trend) >= TRENDS_MIN_LENGHT) {

        $trend = strtolower($trend);

        if (isset($trends[$trend])) {
          $trends[$trend]++;
        } else {
          $trends[$trend] = 1;
        }
      }
    }

    foreach ((array) explode(' ', strip_tags(html_entity_decode(nl2br(trim($value['value']))))) as $trend) {

      if (strlen($trend) >= TRENDS_MIN_LENGHT) {

        $trend = strtolower($trend);

        if (isset($trends[$trend])) {
          $trends[$trend]++;
        } else {
          $trends[$trend] = 1;
        }
      }
    }
  }

  arsort($trends);

  $trends = array_slice($trends, 0, TRENDS_LIMIT);

  $trends = array_flip($trends);
}

$data = [];
foreach ($db->getData($ns, $tx, $query, $limit, PAGE_LIMIT) as $value) {
  $data[] = [
    'namehash' => $value['namehash'],
    'block'    => $value['block'],
    'txid'     => $value['txid'],
    'time'     => date(($rss ? 'r' : 'd-m-Y H:i'), $value['time']),
    'key'      => $rss ? htmlentities(strip_tags(trim($value['key'])), ENT_XML1) : nl2br(trim($value['key'])),
    'value'    => $rss ? htmlentities(strip_tags(trim($value['value'])), ENT_XML1): nl2br(trim($value['value'])),
  ];
}

$older = false;
$newer = false;

if (!in_array($page, [0, 1])) {
  if ($page == 2) {
    $newer = ($ns ? $ns : '');
  } else {
    $newer = ($ns ? $ns . '/' . ($page - 1) : ($page - 1));
  }

  if ($query) {
    $newer = $newer . '?q=' . $query;
  }
}

if ($data) {
  if (in_array($page, [0, 1])) {
    $older = ($ns ? $ns . '/2' : '2');
  } else {
    $older = ($ns ? $ns . '/' . ($page + 1) : ($page + 1));
  }

  if ($query) {
    $older = $older . '?q=' . $query;
  }
}

if ($ns) {
  if ($page) {
    $hrefThisPage = $ns . '/' . $page;
  } else {
    $hrefThisPage = $ns;
  }
} else {
  if ($page) {
    $hrefThisPage = $page;
  } else {
    $hrefThisPage = '';
  }
}

if ($rss) {

  header('Content-type: application/xml');
  require_once('rss.phtml');

} else {

  require_once('index.phtml');

}