fedi-tumblr/include/functions.php

<?php
/* this file stores all of the functions that are used
over all of the other files. */

ini_set("log_errors", 1);
$srv = $user_settings['instance'];
//$token = ($token != false ? msc($token,'d') : false);
$token = ($token != false ? $token : false);

/* the purpose of this function is to encode the auth token
   it is not used for now */
function msc($string, $action = 'e') {
	// you may change these values to your own
	$secret_key = 'yAmfVhZwm0749FSY24dC';
	$secret_iv = 'm37uvAeKjYLKdI1lPkcJ';

	$output = false;
	$encrypt_method = "AES-256-CBC";
	$key = hash('sha256', $secret_key);
	$iv = substr(hash('sha256', $secret_iv) , 0, 16);

	if ($action == 'e') {
		$output = base64_encode(openssl_encrypt($string, $encrypt_method, $key, 0, $iv));
	}
	else if ($action == 'd') {
		$output = openssl_decrypt(base64_decode($string) , $encrypt_method, $key, 0, $iv);
	}

	return $output;
}

/* this function extracts the urls from a text and return them in an array */
function get_urls($input) {
	$pattern = '$(https?://[a-z0-9_./?=&-~]+)(?![^<>]*>)$i'; 
	if (preg_match_all($pattern, $input, $matches)) {
		list($dummy, $links) = ($matches);
		return $links;
	}
	return false;
}

/* this function replaces the emoji codes in a text with the correspondent emojis
   of the specified instance, returns the html code with the emojis in the specified size*/
function emoji($text, $size = 30, $srv) {
	$data = json_decode(file_get_contents("https://$srv/api/v1/custom_emojis") , true) [0]['url'];
	$u = explode("/", $data);
	array_pop($u);
	$url = implode("/", $u);
	$text = str_replace("http:", "http;", $text);
	$text = str_replace("https:", "https;", $text);
	$text = preg_replace('~:([a-z0-9_]+):~', "<img src='$url/$1.png' height=$size style='vertical-align: middle;'>", $text);
	$text = str_replace("http;", "http:", $text);
	$text = str_replace("https;", "https:", $text);
	return $text;
}

/* this is the same as above but is used on other places, like user bios and places where the 
shortcodes and the emoji url is defined in the same place */
function emojify($string, $emojis, $size = 40) {
	foreach ($emojis as $emoji) {
		$string = str_replace(":" . $emoji['shortcode'] . ":", "<img alt='" . $emoji['shortcode'] . "' title='" . $emoji['shortcode'] . "' src='" . $emoji['static_url'] . "' height=$size style='vertical-align: middle;'>", $string);
	}
	return $string;
}


/* this function fetches the context (the previous posts and replies) of a specified post 
   $post = ID of the post.
*/
function context($post) {
	global $srv;
	global $token;

	$curl = curl_init();
	curl_setopt($curl, CURLOPT_URL, "https://$srv/api/v1/statuses/$post/context");
	if (!is_null($token)) {
		curl_setopt($curl, CURLOPT_HTTPHEADER, array(
			'Authorization: Bearer ' . $token
		));
	}
	curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
	$result = curl_exec($curl);
	curl_close($curl);
	return $result;
}

/* this function just reduces an image to a 1x1 pixel image to get the overall color.
   */
function averageColor($url) {
	@$image = imagecreatefromstring(file_get_contents($url));

	if (!$image) {
		$mainColor = "CCCCCC";
	}
	else {
		$thumb = imagecreatetruecolor(1, 1);
		imagecopyresampled($thumb, $image, 0, 0, 0, 0, 1, 1, imagesx($image) , imagesy($image));
		$mainColor = strtoupper(dechex(imagecolorat($thumb, 0, 0)));
	}

	return $mainColor;
}

/* this function fetches all the data from a profile (bio, username, relationships, etc) */
function user_info($user) {
	global $user_settings;
	$info = api_get("accounts/" . $user);
	$rel = api_get("accounts/relationships?id=" . $user);
	return array(
		$info,
		$rel
	);
}


/* a function to make an authenticated general GET api call to the logged-in instance */
function api_get($url) {
	global $srv;
	global $token;

	$curl = curl_init();
	curl_setopt($curl, CURLOPT_URL, "https://$srv/api/v1/" . $url);
	if (!is_null($token)) {
		curl_setopt($curl, CURLOPT_HTTPHEADER, array(
			'Authorization: Bearer ' . $token
		));
	}
	curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
	$result = curl_exec($curl);
	curl_close($curl);
	return json_decode($result, true);
}

/* a function to make an authenticated general POST api call to the logged-in instance */
function api_post($url, $array) {
	global $srv;
	global $token;

	$cSession = curl_init();
	curl_setopt($cSession, CURLOPT_HEADER, false);
	curl_setopt($cSession, CURLOPT_POST, 1);
	curl_setopt($cSession, CURLOPT_URL, "https://$srv/api/v1/" . $url);
	if (!is_null($token)) {
		curl_setopt($cSession, CURLOPT_HTTPHEADER, array(
			'Authorization: Bearer ' . $token
		));
	}
	curl_setopt($cSession, CURLOPT_POSTFIELDS, http_build_query($array));
	curl_setopt($cSession, CURLOPT_RETURNTRANSFER, true);
	$result = curl_exec($cSession);
	curl_close($cSession);

	return json_decode($result, true);
}

/* a function to make general DELETE api calls to the logged-in instance*/
function api_delete($url, $array) {
	global $srv;
	global $token;

	$cSession = curl_init();
	curl_setopt($cSession, CURLOPT_HEADER, false);
	curl_setopt($cSession, CURLOPT_POST, 1);
	curl_setopt($cSession, CURLOPT_URL, "https://$srv/api/v1/" . $url);
	curl_setopt($cSession, CURLOPT_CUSTOMREQUEST, "DELETE");
	if (!is_null($token)) {
		curl_setopt($cSession, CURLOPT_HTTPHEADER, array(
			'Authorization: Bearer ' . $token
		));
	}
	curl_setopt($cSession, CURLOPT_POSTFIELDS, http_build_query($array));
	curl_setopt($cSession, CURLOPT_RETURNTRANSFER, true);
	$result = curl_exec($cSession);
	curl_close($cSession);

	return json_decode($result, true);
}

/* this function is used to generate the html code of a reply */
function render_reply($item) {
	global $user_settings;
	global $logedin;
	global $srv;

	$reply['mode'] = "";
	if (isset($item['type']) && $item['type'] == 'ancestor') {
		$reply['mode'] = "ancestor";
	}

	$reply['id'] = $item['id'];
	$reply['uid'] = $item['account']['id'];
	$reply['name'] = emojify($item['account']['display_name'], $item['account']['emojis'], 15);
	$reply['acct'] = $item['account']['acct'];
	$reply['avatar'] = $item['account']['avatar'];

	$reply['menu'] = "<ul>";
	if ($logedin) {
		$reply['menu'] .= ($item['account']['id'] == $user_settings['uid'] ? "<li><a href='?action=delete&thread=" . $item['id'] . "' onClick='return false;' class='delete fontello' id='" . $item['id'] . "'>&#xe80e; Delete Post</a></li>" : "");

		$reply['menu'] .= ($item['account']['id'] != $user_settings['uid'] ? "<li><a href='?action=mute&user=" . $item['account']['id'] . "' onClick='return false;' class='mute fontello' id='" . $item['account']['id'] . "' style='background-color:transparent;'>&#xe81b; Mute User</a></li>" : "");

		$reply['menu'] .= ($item['account']['id'] != $user_settings['uid'] ? "<li><a href='?action=nsfw&user=" . $item['account']['id'] . "' onClick='return false;' class='nsfw fontello' id='" . $item['account']['id'] . "' style='background-color:transparent;'>&#xe829; User is NSFW</a></li>" : "");
	}

	$reply['menu'] .= "<li><a target='_blank' href='" . $item['url'] . "' class='link fontello'  style='background-color:transparent;'>&#xf14c; Original Note</a></li>";

	$reply['menu'] .= "</ul>";

	$json['id'] = $item['id'];
	$json['scope'] = $item['visibility'];
	if ($logedin) {
		$json['mentions'] = "";
		$array = $item["mentions"];
		$json['mentions'] = ($user_settings['acct'] == $item["account"]['acct'] ? "" : "@" . $item["account"]['acct']) . " ";
		if (!empty($array)) {
			foreach ($array as $mnt) {
				if ($mnt['acct'] != $user_settings['acct']) {
					$json['mentions'] .= "@" . $mnt['acct'] . " ";
				}
			}
		}
	}
	$reply['json'] = json_encode($json);

	$reply['replyto'] = ($item['in_reply_to_id'] ? " <a class='fontello link preview ldr' target='_blank' id='" . $item['in_reply_to_id'] . "' href='?thread=" . $item['in_reply_to_id'] . "'>&#xf112;</a> " : "");
	$reply['text'] = processText($item);

	$public = "&#xe83c;";
	$private = "&#xe819;";
	$unlisted = "&#xe816;";
	$direct = "&#xf0e0;";

	$reply['date'] = "<a style='text-decoration:none;color:darkgray;' target='_blank' href='" . $item['url'] . "'><span class='fontello'>&#xe817;</span></a> - <a class='ldr' style='text-decoration:none;color:darkgray;' target='_blank' href='?thread=" . $item['id'] . "&instance=$srv" . "'>" . date("d/m/y H:i", strtotime($item['created_at'])) . "</a> - <span class='fontello' style='color:darkgray;'>" . $$item['visibility'] . "</span>";

	$reply['media'] = "";
	if (!empty($item['media_attachments'])) {
		$reply['media'] = "<div style='width:170px; display:inline-block; float:left; margin-right:15px; '>";
		$images = count($item['media_attachments']);
		$class = ($images > 1 ? "class='icon'" : "");
		foreach ($item['media_attachments'] as $file) {
			$ext = explode(".", $file['url']);
			$ext = end($ext);
			$ext = explode("?", $ext) [0];
			if ($ext == 'mp4' || $ext == 'webm') {
				$reply['media'] .= "<div style='text-align:center; width:100%;'><video preload='metadata' width='100%' controls ".($user_settings['videoloop'] == "on" ? "loop" : "").">
							<source src='" . $file['url'] . "' type='video/$ext'>
							</video></div>
						";
			}
			elseif ($ext == 'mp3' || $ext == 'ogg') {
				$reply['media'] .= "<div style='text-align:center; width:100%;'><audio controls>
												<source src='" . $file['url'] . "' type='audio/$ext'>
												Your browser does not support the audio tag.
											</audio> </div>";
			}
			else {
				if ($item['sensitive'] == true && $user_settings['explicit'] != 'off') {
					$reply['media'] .= "<div style='overflow:hidden; float:left; margin:2px;' $class><a target='_blank' href='" . $file['url'] . "' onClick='return false;' class='blur'><noscript><img src='" . $file['url'] . "' style='width:100%;'></noscript><img " . "data-src='" . $file['url'] . "'" . " class='' style='max-width:100%; max-height:100% vertical-align:middle;'></a><a target='_blank' href='" . $file['url'] . "' onClick='return false;' class='open-lightbox' style='display:none;'><img src='" . $file['url'] . "' class='' style='width:100%;'></a></div>";
				}
				else {
					$reply['media'] .= "<div style='margin:0px;' $class><a target='_blank' href='" . $file['url'] . "' onClick='return false;' class='open-lightbox'><img src='" . $file['url'] . "'" . " class='' style='max-width:100%; max-height:100%; vertical-align:middle;'><noscript><img src='" . $file['url'] . "' style='width:100%;'></noscript></a></div>";

				}
			}
		}
		$reply['media'] .= "</div>";
	}

	$reply['buttons'] = "
		" . ($logedin ? "<div class='felem'><a onClick='return false' class='replyform' href='?thread=" . $item['id'] . "' style='font-family:fontello'>&#xf112;</a></div>" : "") . "
					<div class='felem'><a onClick='return false' " . ($logedin ? "class='" . ($item['favourited'] == true ? "unfav" : "fav") . "' href='?action=fav&thread=" . $item['id'] . "'" : "") . " style='font-family:fontello'>&#xe802; <span>" . $item['favourites_count'] . "</span></a></div>
					<div class='felem'><a onClick='return false' " . ($logedin && $item['visibility'] == "public" ? "class='" . ($item['reblogged'] == true ? "unreblog" : "reblog") . "' href='?action=reblog&thread=" . $item['id'] . "'" : "") . " style='font-family:fontello'>&#xe83a; <span>" . $item['reblogs_count'] . "</span></a></div>
		";

	$result = themes("get","templates/reply.txt");

	foreach ($reply as $key => $elem) {
		$result = str_replace(":$key:", $elem, $result);
	}

	return $result;
}

/* a function to fav or unfav a specified post */
function favourite($post, $mode) {
	$result = api_post(($mode == true ? "statuses/$post/favourite" : "statuses/$post/unfavourite"),array());

	if (isset($result['favourites_count'])) {
		return $result['favourites_count'];
	}
	else {
		return "error";
	}
}

/* a function to reblog or unreblog a specified post */
function reblog($post, $mode) {
	$result = api_post(($mode == true ? "statuses/$post/reblog" : "statuses/$post/unreblog"),array());
	if (isset($result['reblog']['reblogs_count'])) {
		return $result['reblog']['reblogs_count'];
	}
	elseif (isset($result['reblogs_count'])) {
		return $result['reblogs_count'];
	}
	else {
		return "error";
	}
}

/* function to delete a post */
function delpost($id) {
	global $srv;
	global $token;

	if (!is_null($token)) {
		$curl = curl_init();
		curl_setopt($curl, CURLOPT_HEADER, false);
		curl_setopt($curl, CURLOPT_POST, 1);
		curl_setopt($curl, CURLOPT_URL, "https://$srv/api/v1/statuses/$id");
		curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "DELETE");
		curl_setopt($curl, CURLOPT_HTTPHEADER, array(
			'Authorization: Bearer ' . $token
		));

		curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
		$result = curl_exec($curl);
		curl_close($curl);
		$result = json_decode($result, true);
		if (empty($result)) {
			return "1";
		}
		else {
			return "0";
		}
	}
}

/* function to send a new post to the logged in instance
   it takes the media ids as an array */
function sendpost($text, $media, $reply, $markdown = false, $scope, $sensitive, $spoiler = false) {
	global $srv;
	global $token;
	if (!is_null($token)) {

		$cSession = curl_init();
		curl_setopt($cSession, CURLOPT_URL, "https://$srv/api/v1/statuses");
		curl_setopt($cSession, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($cSession, CURLOPT_POST, 1);
		curl_setopt($cSession, CURLOPT_HTTPHEADER, array(
			'Authorization: Bearer ' . $token
		));
		$query = "";
		$query .= "status=" . urlencode(html_entity_decode($text, ENT_QUOTES)) . "&visibility=" . $scope;;
		if (!is_null($reply) && $reply != "null") {
			$query .= "&in_reply_to_id=" . $reply;
		}
		if ($markdown == true) {
			$query .= "&content_type=text/markdown";
		}
		if ($sensitive == 'true') {
			$query .= "&sensitive=true";
		}
		if ($spoiler == true) {
			$query .= "&spoiler_text=" . $spoiler;
		}

		if (!is_null($media)) {
			foreach ($media as $mid) {
				$query .= "&media_ids[]=" . $mid;
			}
		}
		
		curl_setopt($cSession, CURLOPT_POSTFIELDS, $query);
		$result = curl_exec($cSession);
		curl_close($cSession);
		return $result;
	}
	else {
		return false;
	}
}

/* uploads a file to the logged in instance.
   the function takes the file from the local storage */
function uploadpic($file) {
	global $srv;
	global $token;
	if (!is_null($token)) {
		$mime = get_mime($file);
		$info = pathinfo($file);
		$name = $info['basename'];
		$output = new CURLFile($file, $mime, $name);

		do {
			$cSession = curl_init();
			curl_setopt($cSession, CURLOPT_URL, "https://$srv/api/v1/media");
			curl_setopt($cSession, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($cSession, CURLOPT_POST, 1);
			curl_setopt($cSession, CURLOPT_HTTPHEADER, array(
				'Authorization: Bearer ' . $token
			));
			curl_setopt($cSession, CURLOPT_POSTFIELDS, array(
				'file' => $output
			));
			$result = curl_exec($cSession);
		} while (empty($result));
		curl_close($cSession);
		$array = json_decode($result, true);

		$ext = explode(".", $array['url']);
		$ext = end($ext);
		$ext = explode("?", $ext) [0];

		if (in_array($ext, array(
			'jpg',
			'jpeg',
			'gif',
			'png',
			'svg'
		))) {
			$file = $array['url'];
		}
		else {
			$file = "img/doc.png";
		}
		return json_encode(array(
			$array['id'],
			$file
		));
	}
	else {
		return false;
	}
}

/* this is used to register DashFE as an application on an instance 
   mostly used when logging in
 */

function register_app($instance) {
	global $setting;

	$cSession = curl_init();
	curl_setopt($cSession, CURLOPT_URL, "https://$instance/api/v1/apps");
	curl_setopt($cSession, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($cSession, CURLOPT_HEADER, false);
	curl_setopt($cSession, CURLOPT_POST, 1);
	curl_setopt($cSession, CURLOPT_POSTFIELDS, http_build_query(array(
		'client_name' => $setting['appname'],
		'redirect_uris' => $setting['url'],
		'scopes' => 'read write follow'
	)));
	$result = curl_exec($cSession);
	curl_close($cSession);

	return json_decode($result, true);
}

/* This function will fetch and render all the notifications since an $id
   or get a list of all past notification ($max notifications specified)
   */
function getnotif($id = false, $max = false) {
	global $srv;
	global $token;
	global $user_settings;
	$n = "";
	$notif = api_get("notifications?" . ($id == false ? "limit=9&" : "") . ($id != false ? ($max == true ? "max_id=$id" : "since_id=$id") : ""));
	if (!empty($notif)) {
		foreach ($notif as $post) {
			if (!isset($post["type"])){
				break;
			}
			$user = "<a class='link ldr uname' style='font-size:12px;' href='?user=" . $post['account']['id'] . "'>" . emojify($post['account']['display_name'], $post['account']['emojis'], 10) . "</a>";
			$preview = "";
			$buttons = "";
			$media = "";

			if ($post["type"] == "pleroma:emoji_reaction"){
				continue;
			}

			switch ($post["type"]) {
				case "mention":
					if ($post['status']['in_reply_to_id'] == null) {
						$type = "<span class='fontello' style='color:#62C2CC; font-size:10px;'>&#xf10d;</span>";
						$string = "mentioned you in a post";
						$preview = "<a style='text-decoration:none;' class='ldr text' href='?thread=" . $post['status']['id'] . "' target='_blank'><span style='display:block; opacity:1; font-size:10px; line-height:12px;'>" . emojify(strip_tags(trim($post['status']['content']) , '<br><br \>') , $post['status']['emojis'], 15) . "</span></a>";
						$media = (!empty($post['status']['media_attachments']) ? "<a style='text-decoration:none;' class='ldr' href='?thread=" . $post['status']['id'] . "' target='_blank'><div style='flex: 0 0 60px; background-size:cover; background-image:url(" . $post['status']['media_attachments'][0]['url'] . ");'></div></a>" : "");
					}
					else {
						$type = "<span class='fontello' style='color:#62C2CC; font-size:10px;'>&#xf112;</span>";
						$string = "replied to your post";
						$preview = "<a style='text-decoration:none;' class='ldr text' href='?thread=" . $post['status']['id'] . "' target='_blank'><span style='display:block; opacity:1; font-size:10px; line-height:12px;'>" . emojify(strip_tags(trim($post['status']['content']) , '<br><br \>') , $post['status']['emojis'], 15) . "</span></a>";
						$media = (!empty($post['status']['media_attachments']) ? "<div style='flex: 0 0 60px; background-size:cover; background-image:url(" . $post['status']['media_attachments'][0]['url'] . ");'></div>" : "");
					}

					$array = $post['status']["mentions"];
					$mentions = ($user_settings['acct'] == $post['status']['account']['acct'] ? "" : "@" . $post['status']['account']['acct']) . " ";
					if (!empty($array)) {
						foreach ($array as $mnt) {
							if ($mnt['acct'] != $user_settings['acct']) {
								$mentions .= "@" . $mnt['acct'] . " ";
							}
						}
					}

					$buttons = "<div class='post_buttons' id='" . $post['status']['id'] . "' style='position:absolute; right:10px; bottom:10px; border-radius:60px; padding:5px;'>
					<div class='felem'><a onClick='return false' class='quickreply' id='" . $post['status']['id'] . "' data-mentions='" . $mentions . "' href='?thread=" . $post['status']['id'] . "' style='font-family:fontello'>&#xe824;</a></div>
					<div class='felem'><a onClick='return false' class='" . ($post['status']['favourited'] == true ? "unfav" : "fav") . "' href='?action=fav&thread=" . $post['status']['id'] . "'" . " style='font-family:fontello'>&#xe802;</a></div>
					<div class='felem'><a onClick='return false' " . ($post['status']['visibility'] == "public" || $post['status']['visibility'] == "unlisted" ? "class='" . ($post['status']['reblogged'] == true ? "unreblog" : "reblog") . "' href='?action=reblog&thread=" . $post['status']['id'] . "'" : "") . " style='font-family:fontello'>&#xe83a;</a></div></div>";
				break;

				case "favourite":
					$type = "<span class='fontello' style='color:#F17022; font-size:10px;'>&#xe802;</span>";
					$string = "favourited your post";
					$preview = "<a style='text-decoration:none;' class='ldr text' href='?thread=" . $post['status']['id'] . "' target='_blank'><span style='display:block; opacity:1; font-size:10px; line-height:12px;'>" . (!empty($post['status']['content']) ? emojify(strip_tags(trim($post['status']['content']) , '<br><br \>') , $post['status']['emojis'], 15) : "Favourited your image") . "</span></a>";
					$media = (!empty($post['status']['media_attachments']) ? "<div style='flex: 0 0 60px; background-size:cover; background-image:url(" . $post['status']['media_attachments'][0]['url'] . ");'></div>" : "");
				break;

				case "reblog":
					$type = "<span class='fontello' style='color:#D1DC29; font-size:10px;'>&#xe826;</span>";
					$string = "reblogged your post";
					$preview = "<a style='text-decoration:none;' class='ldr text' href='?thread=" . $post['status']['id'] . "' target='_blank'><span style='display:block; opacity:1; font-size:10px; line-height:12px;'>" . (!empty($post['status']['content']) ? emojify(strip_tags(trim($post['status']['content']) , '<br><br \>') , $post['status']['emojis'], 15) : "Reblogged your image") . "</span></a>";
					@$media = (!is_null($post['status']['media_attachments']) ? "<div style='flex: 0 0 60px; background-size:cover; background-image:url(" . $post['status']['media_attachments'][0]['url'] . ");'></div>" : "");
				break;

				case "follow":
					list($info, $rel) = user_info($post["account"]["id"]);
					$type = "<span class='fontello' style='color:#FDB813; font-size;10px;'>&#xf234;</span>";
					$preview = "started following you";
					if ($rel[0]['following']) {
						$label = "&#xe80c; Following";
						$class = "unfollow";
					}
					else {
						if ($info['locked']) {
							if ($rel[0]['requested']) {
								$label = "&#xe806; 	Follow Requested";
								$class = "unfollow";
							}
							else {
								$label = "&#xe806; Request Follow";
								$class = "follow";
							}
						}
						else {
							$label = "&#xf234; Follow";
							$class = "follow";
						}
					}
					$buttons .= "<div class='post_buttons' style='position:absolute; right:10px; bottom:10px; border-radius:60px; padding:5px;'><span id='" . $info['id'] . "' class='profileButton $class' style='background-color:white; font-family:sans,fontello ;font-size:13px;'>$label</span></div>";
				break;
			}

			$n .= "
			<div class='notif " . ($id == false ? "" : "new") . "' id='" . $post['id'] . "'>
				<div class='notifContents'>
					<div style='flex: 0 0 60px; background-size:cover; background-image:url(" . $post['account']['avatar'] . "); border-radius:5px;'></div>
					<div style='flex: 1; padding-left:5px; padding-right:5px; word-break: break-word; overflow:hidden;'>
					<span>$type <span style='font-size:12px; font-weight:bold;'>$user</span></span>
					" . trim($preview) . "
					$buttons
					</div>
					$media
				</div>
			</div>
			";

		}
		return $n;
	}
}

/* this function will get all the notes (reblogs and favs) that has an specified post */ 
function getnotes($thread) {
	global $user_settings;
	global $token;
	global $srv;
	global $setting;
	global $logedin;
	@$reb = array(
		json_decode(file_get_contents("https://$srv/api/v1/statuses/" . $thread . "/reblogged_by") , true)
	);
	@$fab = array(
		json_decode(file_get_contents("https://$srv/api/v1/statuses/" . $thread . "/favourited_by") , true)
	);
	$limit = (count($reb[0]) > count($fab[0]) ? count($reb[0]) - 1 : count($fab[0]) - 1);

	$notes = array();
	$index = 0;

	for ($i = 0;$i <= $limit;$i++) {
		if (isset($reb[0][$i])) {
			$notes[$index][0] = "reb";
			$notes[$index][1] = $reb[0][$i];
			$index++;
		}
		if (isset($fab[0][$i])) {
			$notes[$index][0] = "fav";
			$notes[$index][1] = $fab[0][$i];
			$index++;
		}
	}

	return $notes;
}

/* this function will fetch all the replies that a post have
   or will fetch only the ones after a specified ($since) post id
*/
function getreplies($thread, $since = false) {
	global $user_settings;
	global $token;
	global $srv;
	global $setting;
	global $logedin;
	$context = json_decode(context($thread) , true);
	$array = array();
	if (!empty($context['ancestors'])) {
		if ($since == false) {
			foreach ($context['ancestors'] as $elem) {
				$elem['type'] = 'ancestor';
				$array[] = $elem;
			}
		}
	}
	$flag = 0;
	if (!empty($context['descendants'])) {
		foreach ($context['descendants'] as $elem) {
			if (($since != false && $flag == 1) || $since == false) {
				$elem['type'] = 'descendant';
				$array[] = $elem;
			}
			if ($since != false && $elem['id'] == $since) {
				$flag = 1;
			}
		}
	}

	$replies = array();

	foreach ($array as $item) {
		$reply['mode'] = "";
		if ($item['type'] == 'ancestor') {
			$reply['mode'] = "ancestor";
		}

		$replies[] = array(
			'mode' => $reply['mode'],
			'content' => $item
		);
	}

	return $replies;
}


/* this function takes some options from the init.php file and the user_settings cookie 
   and fetches all the posts of the appropiate timeline */
function timeline($query) {
	global $token;
	global $srv;

	$notes = "";
	$media = ($query['text'] == "on" ? "" : "&only_media=true");
	$next = ($query['next'] ? "&max_id=" . $query['next'] : ($query['since'] ? "&since_id=" . $query['since'] : ""));

	switch ($query['mode']) {
		case "home":
			$array = api_get("timelines/home?limit=25{$media}{$next}");
		break;

		case "federated":
			$array = api_get("timelines/public?limit=25{$media}{$next}");
		break;

		case "tag":
			$array = api_get("timelines/tag/" . $query['tag'] . "?limit=25{$media}{$next}");
		break;

		case "local":
			$array = api_get("timelines/public?limit=25&local=true{$media}{$next}");
		break;

		case "user":
			$array = api_get("accounts/" . $query['user'] . "/statuses?limit=25{$media}{$next}");
		break;

		case "thread":
			$array = array(
				api_get("statuses/" . $query['thread'])
			);
		break;

		case "favourites":
			$array = api_get("favourites?limit=25{$media}{$next}");
		break;

		case "direct":
			$array = api_get("timelines/direct?limit=25{$next}");
		break;

		case "list":
			$array = api_get("timelines/list/" . $query['list'] . "?limit=25{$next}");
		break;

		case "bookmarks":
			$array = api_get("bookmarks?limit=25{$next}");
		break;

		case "account":
			$info = api_get("accounts/verify_credentials");
			$array = api_get("accounts/" . $info['id'] . "/statuses?limit=25{$media}{$next}");
		break;

		default:
			$array = api_get("timelines/public?limit=25{$media}{$next}");
		break;
	}

	if (!is_array($array)) {
		return false;
	}

	$next = end($array) ['id'];
	$thread = array();

	foreach ($array as $elem) {
		if ($query['replies'] == "on" || $query['mode'] == "thread") {
			$thread[] = $elem;
		}
		else {
			if ($elem['in_reply_to_id'] == null) {
				$thread[] = $elem;
			}
		}

	}

	return array(
		$thread,
		$next
	);
}

/* this function takes in a whole post entity and spits out the HTMLfied text of the post
   with the urls and @handles linkified and all the emojis replaced */

function processText($elem) {
	global $user_settings;
	require_once "vendor/simple_html_dom.php";
	$content = trim(html_entity_decode($elem['content'],ENT_QUOTES));
	
	if (!empty($content)) {
		$html = str_get_html($content);
		foreach ($html->find('a') as $lnk) {
			foreach ($elem['media_attachments'] as $f) {
				if (is_numeric(strpos($f['description'],explode("…",$lnk->innertext)[0]))) {
					$content = str_replace($lnk->outertext . "<br/>", null, $content);
					$content = str_replace("<br/>" . $lnk->outertext, null, $content);
					$content = str_replace($lnk->outertext, null, $content);
				}
			}
			
			if (is_numeric(strpos($lnk->href, $user_settings['instance'])) || in_array($lnk->class, array(
				"u-url mention",
				"hashtag"
			)) || $lnk->rel == "tag") {
				$content = str_replace($lnk->outertext, $lnk->innertext, $content);
			}
			else {
				$prv = $lnk->outertext;
				$lnk->target = '_blank';
				$lnk->class = 'link external';
				$content = str_replace($prv, $lnk->outertext, $content);
			}
		}
	}

	$result = strip_tags($content, '<br><p><strong><a><em><strike>');
	$result = str_replace('<br />', ' <br>', $result);
	//$result = str_replace('&#39;', "'", $result);

	foreach ($elem['mentions'] as $mention) {
		$result = str_replace("@" . $mention['username'], "<span class='user' id='" . $mention['id'] . "'><a href='?user=" . $mention['id'] . "' class='link ldr' onClick='return false;'>@" . $mention['username'] . "</a></span>", $result);
	}

	//$result = preg_replace("/(?<!=\")(\b[\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/", "<a target=\"_blank\" class='external' style='color:navy;' href=\"$1\">$1</a>", $result);
	$result = emojify($result, $elem['emojis']);
	$result = preg_replace("/#([A-Za-z0-9\/\.]*)/", "<a class='ldr' href=\"./?tag=$1\"><b>#$1</b></a>", $result);

	return $result;
}


/* function used in the process of uploading a file */
function get_mime($filename) {
	$result = new finfo();

	if (is_resource($result) === true) {
		return $result->file($filename, FILEINFO_MIME_TYPE);
	}

	return false;
}

function sanitize($text){
	return preg_replace("/[^a-zA-Z0-9]+/", "", $text);
}


function themes($mode,$name = false){
	global $user_settings;
	switch ($mode){
		case "list":
			$themes = scandir("themes/");
			$themelist = array();
			foreach ($themes as $elem){
				if ($elem != ".." && $elem != "." && $elem != "custom"){
					$themelist[] = $elem;
				}
			}
			return $themelist;
			
		case "file":
			$theme = sanitize($user_settings['theme']);
			//if (file_exists("themes/$theme/$name")){
				return "themes/$theme/$name";
			//}
			
		case "get":
			$theme = sanitize($user_settings['theme']);
			//if (file_exists("themes/$theme/$name")){
				return file_get_contents("themes/$theme/$name");
			//}
	}
}