mirror of
https://git.lolcat.ca/lolcat/4get.git
synced 2024-12-03 23:42:16 -05:00
add structure for `Oracles' (special answers depending on queries + a few implementations (#10)
incl. a calculator, a hash encoder + rot13 and b64!, and a "what time is it" with timezone selection frontend injected in $payload["left"] in web.php you can see this live [on my instance](https://4get.silly.computer/web?s=7%2B8(9%5E2)&scraper=brave&nsfw=yes) (there are some issues that aren't related to this PR. favicons, etc. I'll fix them later.) Reviewed-on: https://git.lolcat.ca/lolcat/4get/pulls/10 Co-authored-by: cynic <admin@cynic.moe> Co-committed-by: cynic <admin@cynic.moe>
This commit is contained in:
cynic
lolcat
parent
d312674df7
commit
8762d68466
6 changed files with 349 additions and 0 deletions
24
oracles/base.php
Normal file
24
oracles/base.php
Normal file
|
|
@ -0,0 +1,24 @@
|
|||
<?php
|
||||
abstract class oracle {
|
||||
// some info to spit out alongside the result, so the user knows
|
||||
// what exactly is giving out the answer. prevents confusion
|
||||
// about what oracle is answering them for ambiguous queries.
|
||||
public $info = [
|
||||
"name" => "some oracle"
|
||||
];
|
||||
// this function should take in a query string search from $_GET,
|
||||
// and return a bool determining whether or not it is a question
|
||||
// intended for the oracle.
|
||||
public function check_query($q) {
|
||||
return false;
|
||||
}
|
||||
// produce the correct answer for the query using the oracle.
|
||||
// note: if it becomes apparent /during generation/ that the
|
||||
// query is not in fact for the oracle, returning an empty
|
||||
// string will kill the oracle pane.
|
||||
// answer format: ["ans1 title" => "ans1", ...]
|
||||
public function generate_response($q) {
|
||||
return "";
|
||||
}
|
||||
}
|
||||
?>
|
||||
158
oracles/calc.php
Normal file
158
oracles/calc.php
Normal file
|
|
@ -0,0 +1,158 @@
|
|||
<?php
|
||||
include_once("oracles/base.php");
|
||||
class calculator extends oracle {
|
||||
public $info = [
|
||||
"name" => "calculator"
|
||||
];
|
||||
public function check_query($q) {
|
||||
// straight numerics should go to that oracle
|
||||
if (is_numeric($q)) {
|
||||
return false;
|
||||
}
|
||||
// all chars should be number-y or operator-y
|
||||
$char_whitelist = str_split("1234567890.+-/*^%() ");
|
||||
foreach (str_split($q) as $char) {
|
||||
if (!in_array($char, $char_whitelist)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
// a custom parser and calculator because FUCK YUO, libraries are
|
||||
// gay.
|
||||
public function generate_response($q)
|
||||
{
|
||||
$nums = str_split("1234567890.");
|
||||
$ops = str_split("+-/*^%;");
|
||||
$grouping = str_split("()");
|
||||
|
||||
$q = str_replace(" ", "", $q);
|
||||
|
||||
// backstop for the parser so it catches the last
|
||||
// numeric token
|
||||
$q .= ";";
|
||||
|
||||
// the following comments refer to this example input:
|
||||
// 21+9*(3+2^9)+1
|
||||
|
||||
// 2-length lists of the following patterns:
|
||||
// ["n" (umeric), <some number>]
|
||||
// ["o" (perator), "<some operator>"]
|
||||
// ["g" (roup explicit), <"(" or ")">]
|
||||
// e.g. [["n", 21], ["o", "+"], ["n", 9], ["o", *],
|
||||
// ["g", "("], ["n", 3], ["o", "+"], ["n", 2],
|
||||
// ["o", "^"], ["n", 9], ["g", ")"], ["o", "+"],
|
||||
// ["n", "1"]]
|
||||
$tokens = array();
|
||||
$dragline = 0;
|
||||
foreach(str_split($q) as $i=>$char) {
|
||||
if (in_array($char, $nums)) {
|
||||
continue;
|
||||
}
|
||||
elseif (in_array($char, $ops) || in_array($char, $grouping)) {
|
||||
// hitting a non-numeric implies everything since the
|
||||
// last hit has been part of a number
|
||||
$capture = substr($q, $dragline, $i - $dragline);
|
||||
// prevent the int cast from creating imaginary
|
||||
// ["n", 0] tokens
|
||||
if ($capture != "") {
|
||||
if (substr_count($capture, ".") > 1) {
|
||||
return "";
|
||||
}
|
||||
array_push($tokens, ["n", (float)$capture]);
|
||||
}
|
||||
// reset to one past the current (non-numeric) char
|
||||
$dragline = $i + 1;
|
||||
// the `;' backstop is not a real token and this should
|
||||
// never be present in the token list
|
||||
if ($char != ";") {
|
||||
array_push($tokens, [
|
||||
($char == "(" || $char == ")") ? "g" : "o",
|
||||
$char
|
||||
]);
|
||||
}
|
||||
}
|
||||
else {
|
||||
return "";
|
||||
}
|
||||
}
|
||||
|
||||
// two operators back to back should fail
|
||||
for ($i = 1; $i < count($tokens); $i++) {
|
||||
if ($tokens[$i][0] == "o" && $tokens[$i-1][0] == "o") {
|
||||
return "";
|
||||
}
|
||||
}
|
||||
|
||||
//strategy:
|
||||
// traverse to group open (if there is one)
|
||||
// - return to start with the internals
|
||||
// traverse to ^, attack token previous and after
|
||||
// same but for *, then / then + then -
|
||||
// poppers all teh way down
|
||||
try {
|
||||
return [
|
||||
substr($q, 0, strlen($q)-1)." = " => $this->executeBlock($tokens)[0][1]
|
||||
];
|
||||
}
|
||||
catch (\Throwable $e) {
|
||||
if (get_class($e) == "DivisionByZeroError") {
|
||||
return [
|
||||
$q." = " => "Division by Zero Error!!"
|
||||
];
|
||||
}
|
||||
return "";
|
||||
}
|
||||
}
|
||||
public function executeBlock($tokens) {
|
||||
if (count($tokens) >= 2 && $tokens[0][0] == "o" && $tokens[0][1] == "-" && $tokens[1][0] == "n") {
|
||||
array_splice($tokens, 0, 2, [["n", -1 * (float)$tokens[1][1]]]);
|
||||
}
|
||||
if (count($tokens) > 0 && $tokens[0][0] == "o" || $tokens[count($tokens)-1][0] == "o") {
|
||||
throw new Exception("Error Processing Request", 1);
|
||||
}
|
||||
if (in_array(["g", "("], $tokens)) {
|
||||
$first_open = array_search(["g", "("], $tokens);
|
||||
$enclosedality = 1;
|
||||
for ($i = $first_open+1; $i < count($tokens); $i++) {
|
||||
if ($tokens[$i][0] == "g") {
|
||||
$enclosedality += ($tokens[$i][1] == "(") ? 1 : -1;
|
||||
}
|
||||
if ($enclosedality == 0) {
|
||||
array_splice($tokens,
|
||||
$first_open,
|
||||
$i+1 - $first_open,
|
||||
$this->executeBlock(
|
||||
array_slice($tokens, $first_open+1, $i-1 - $first_open)
|
||||
)
|
||||
);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
$operators_in_pemdas_order = [
|
||||
"^" => (fn($x, $y) => $x ** $y),
|
||||
"*" => (fn($x, $y) => $x * $y),
|
||||
"/" => (fn($x, $y) => $x / $y),
|
||||
"%" => (fn($x, $y) => $x % $y),
|
||||
"+" => (fn($x, $y) => $x + $y),
|
||||
"-" => (fn($x, $y) => $x - $y)
|
||||
];
|
||||
foreach ($operators_in_pemdas_order as $op=>$func) {
|
||||
while (in_array(["o", $op], $tokens)) {
|
||||
for ($i = 0; $i < count($tokens); $i++) {
|
||||
if ($tokens[$i] == ["o", $op]) {
|
||||
array_splice(
|
||||
$tokens,
|
||||
$i-1,
|
||||
3,
|
||||
[["n", (string)($func((float)$tokens[$i-1][1], (float)$tokens[$i+1][1]))]]
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return $tokens;
|
||||
}
|
||||
}
|
||||
?>
|
||||
40
oracles/encoder.php
Normal file
40
oracles/encoder.php
Normal file
|
|
@ -0,0 +1,40 @@
|
|||
<?php
|
||||
include_once("oracles/base.php");
|
||||
class encoder extends oracle {
|
||||
public $info = [
|
||||
"name" => "text encoder/hasher"
|
||||
];
|
||||
private $special_types = [
|
||||
"rot13",
|
||||
"base64"
|
||||
];
|
||||
public function check_query($q) {
|
||||
$types = array_merge($this->special_types, hash_algos());
|
||||
foreach ($types as $type) {
|
||||
$type .= " ";
|
||||
if (str_starts_with($q, $type)) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
public function generate_response($q)
|
||||
{
|
||||
$type = explode(" ", $q)[0];
|
||||
$victim = substr($q, strlen($type)+1);
|
||||
if (in_array($type, hash_algos())) {
|
||||
return [$type." hash" => hash($type, $victim)];
|
||||
}
|
||||
switch ($type) {
|
||||
case "rot13":
|
||||
return ["rot13 encoded" => str_rot13($victim)];
|
||||
case "base64":
|
||||
return [
|
||||
"base64 encoded" => base64_encode($victim),
|
||||
"base64 decoded" => base64_decode($victim)
|
||||
];
|
||||
}
|
||||
return "";
|
||||
}
|
||||
}
|
||||
?>
|
||||
54
oracles/numerics.php
Normal file
54
oracles/numerics.php
Normal file
|
|
@ -0,0 +1,54 @@
|
|||
<?php
|
||||
include_once("oracles/base.php");
|
||||
class numerics extends oracle {
|
||||
public $info = [
|
||||
"name" => "numeric base conversion"
|
||||
];
|
||||
public function check_query($q) {
|
||||
if (str_contains($q, " ")) {
|
||||
return false;
|
||||
}
|
||||
|
||||
$q = strtolower($q);
|
||||
|
||||
$profiles = [
|
||||
["0x", str_split("0123456789abcdef")],
|
||||
["", str_split("1234567890")],
|
||||
["b", str_split("10")]
|
||||
];
|
||||
|
||||
foreach ($profiles as $profile) {
|
||||
$good = true;
|
||||
$good &= str_starts_with($q, $profile[0]);
|
||||
$nq = substr($q, strlen($profile[0]));
|
||||
foreach (str_split($nq) as $c) {
|
||||
$good &= in_array($c, $profile[1]);
|
||||
}
|
||||
if ($good) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
public function generate_response($q) {
|
||||
$n = 0;
|
||||
if (str_starts_with($q, "0x")) {
|
||||
$nq = substr($q, strlen("0x"));
|
||||
$n = hexdec($nq);
|
||||
}
|
||||
elseif (str_starts_with($q, "b")) {
|
||||
$nq = substr($q, strlen("b"));
|
||||
$n = bindec($nq);
|
||||
}
|
||||
else {
|
||||
$n = (int)$q;
|
||||
}
|
||||
return [
|
||||
"decimal (base 10)" => (string)$n,
|
||||
"hexadecimal (base 16)" => "0x".(string)dechex($n),
|
||||
"binary (base 2)" => "b".(string)decbin($n),
|
||||
"" => "binary inputs should be prefixed with 'b', hex with '0x'."
|
||||
];
|
||||
}
|
||||
}
|
||||
?>
|
||||
44
oracles/time.php
Normal file
44
oracles/time.php
Normal file
|
|
@ -0,0 +1,44 @@
|
|||
<?php
|
||||
include_once("oracles/base.php");
|
||||
class time extends oracle {
|
||||
public $info = [
|
||||
"name" => "what time is it?"
|
||||
];
|
||||
public function check_query($q) {
|
||||
$prompts = [
|
||||
"what", "time", "is", "it",
|
||||
"right", "now", "the", "current",
|
||||
"get"
|
||||
];
|
||||
$q = str_replace(",", "", $q);
|
||||
$q = str_replace("?", "", $q);
|
||||
$q = str_replace("what's", "what is", $q);
|
||||
$oq = $q;
|
||||
$q = explode(" ", $q);
|
||||
$count = 0;
|
||||
foreach ($q as $word) {
|
||||
if (in_array($word, $prompts)) {
|
||||
$count++;
|
||||
}
|
||||
}
|
||||
// remove one from total count if a timezone is specified
|
||||
return ($count/(count($q) + (str_contains($oq, "tz:") ? -1 : 0))) > 3/4;
|
||||
}
|
||||
public function generate_response($q) {
|
||||
$timezone = timezone_name_from_abbr("UTC");
|
||||
foreach (explode(" ", $q) as $word) {
|
||||
if (str_starts_with($word, "tz:")) {
|
||||
$decltz = timezone_name_from_abbr(substr($word, 3, 3));
|
||||
if ($decltz) {
|
||||
$timezone = $decltz;
|
||||
}
|
||||
}
|
||||
}
|
||||
date_default_timezone_set($timezone);
|
||||
return [
|
||||
"The time in ".$timezone => date("H:i:s"),
|
||||
"" => "include the string \"tz:XXX\" to use timezone XXX"
|
||||
];
|
||||
}
|
||||
}
|
||||
?>
|
||||
29
web.php
29
web.php
|
|
@ -475,6 +475,35 @@ if($c !== 0){
|
|||
$payload["left"] .= '</table>';
|
||||
}
|
||||
|
||||
/*
|
||||
Prepend Oracle output, if applicable
|
||||
*/
|
||||
include_once("oracles/encoder.php");
|
||||
include_once("oracles/calc.php");
|
||||
include_once("oracles/time.php");
|
||||
include_once("oracles/numerics.php");
|
||||
$oracles = [new calculator(), new encoder(), new time(), new numerics()];
|
||||
$fortune = "";
|
||||
foreach ($oracles as $oracle) {
|
||||
if ($oracle->check_query($_GET["s"])) {
|
||||
$resp = $oracle->generate_response($_GET["s"]);
|
||||
if ($resp != "") {
|
||||
$fortune .= "<div class=\"infobox\">";
|
||||
foreach ($resp as $title => $r) {
|
||||
if ($title) {
|
||||
$fortune .= "<h3>".htmlspecialchars($title)."</h3><div class=\"code\">".htmlspecialchars($r)."</div>";
|
||||
}
|
||||
else {
|
||||
$fortune .= "<i>".$r."</i><br>";
|
||||
}
|
||||
}
|
||||
$fortune .= "<small>Answer provided by oracle: ".$oracle->info["name"]."</small></div>";
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
$payload["left"] = $fortune . $payload["left"];
|
||||
|
||||
/*
|
||||
Load next page
|
||||
*/
|
||||
|
|
|
|||
Loading…
Reference in a new issue