Gazelle/sections/api/inbox/inbox.php

<?php
#declare(strict_types=1);

$UserID = $LoggedUser['ID'];


if (empty($_GET['type'])) {
  $Section = 'inbox';
} else {
  $Section = $_GET['type']; // either 'inbox' or 'sentbox'
}
if (!in_array($Section, array('inbox', 'sentbox'))) {
  print
    json_encode(
      array(
        'status' => 'failure'
      )
    );
  error();
}

list($Page, $Limit) = Format::page_limit(MESSAGES_PER_PAGE);

$Sort = empty($_GET['sort']) || $_GET['sort'] != "unread" ? "Date DESC" : "cu.Unread = '1' DESC, DATE DESC";

$sql = "
  SELECT
    SQL_CALC_FOUND_ROWS
    c.ID,
    c.Subject,
    cu.Unread,
    cu.Sticky,
    cu.ForwardedTo,
    um2.Username AS ForwardedName,
    cu2.UserID,
    um.Username,
    ui.Donor,
    ui.Warned,
    um.Enabled,
    ui.Avatar,";
$sql .= $Section === 'sentbox' ? ' cu.SentDate ' : ' cu.ReceivedDate ';
$sql .= "AS Date
  FROM pm_conversations AS c
    LEFT JOIN pm_conversations_users AS cu ON cu.ConvID = c.ID AND cu.UserID = '$UserID'
    LEFT JOIN pm_conversations_users AS cu2 ON cu2.ConvID = c.ID AND cu2.UserID != '$UserID' AND cu2.ForwardedTo = 0
    LEFT JOIN users_main AS um ON um.ID = cu2.UserID
    LEFT JOIN users_info AS ui ON ui.UserID = um.ID
    LEFT JOIN users_main AS um2 ON um2.ID = cu.ForwardedTo";

if (!empty($_GET['search']) && $_GET['searchtype'] === 'message') {
  $sql .= ' JOIN pm_messages AS m ON c.ID = m.ConvID';
}
$sql .= " WHERE ";
if (!empty($_GET['search'])) {
  $Search = db_string($_GET['search']);
  if ($_GET['searchtype'] === 'user') {
    $sql .= "um.Username LIKE '$Search' AND ";
  } elseif ($_GET['searchtype'] === 'subject') {
    $Words = explode(' ', $Search);
    $sql .= "c.Subject LIKE '%".implode("%' AND c.Subject LIKE '%", $Words)."%' AND ";
  } elseif ($_GET['searchtype'] === 'message') {
    $Words = explode(' ', $Search);
    $sql .= "m.Body LIKE '%".implode("%' AND m.Body LIKE '%", $Words)."%' AND ";
  }
}
$sql .= $Section === 'sentbox' ? ' cu.InSentbox' : ' cu.InInbox';
$sql .= " = '1'";

$sql .= "
  GROUP BY c.ID
  ORDER BY cu.Sticky, $Sort
  LIMIT $Limit";
$Results = $DB->query($sql);
$DB->query('SELECT FOUND_ROWS()');
list($NumResults) = $DB->next_record();
$DB->set_query_id($Results);

$CurURL = Format::get_url(array('sort'));
if (empty($CurURL)) {
  $CurURL = "inbox.php?";
} else {
  $CurURL = "inbox.php?".$CurURL."&";
}

$Pages = Format::get_pages($Page, $NumResults, MESSAGES_PER_PAGE, 9);

$JsonMessages = [];
while (list($ConvID, $Subject, $Unread, $Sticky, $ForwardedID, $ForwardedName, $SenderID, $Username, $Donor, $Warned, $Enabled, $Avatar, $Date) = $DB->next_record()) {
  $JsonMessage = array(
    'convId' => (int)$ConvID,
    'subject' => $Subject,
    'unread' => $Unread == 1,
    'sticky' => $Sticky == 1,
    'forwardedId' => (int)$ForwardedID,
    'forwardedName' => $ForwardedName,
    'senderId' => (int)$SenderID,
    'username' => $Username,
    'avatar' => $Avatar,
    'donor' => $Donor == 1,
    'warned' => $Warned == 1,
    'enabled' => $Enabled == 2 ? false : true,
    'date' => $Date
  );
  $JsonMessages[] = $JsonMessage;
}

print
  json_encode(
    array(
      'status' => 'success',
      'response' => array(
        'currentPage' => (int)$Page,
        'pages' => ceil($NumResults / MESSAGES_PER_PAGE),
        'messages' => $JsonMessages
      )
    )
  );
?>