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add structure for `Oracles' (special answers depending on queries + a few implementations (#10)

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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 2023-09-13 22:24:02 -05:00 • committed by lolcat
parent d312674df7
commit 8762d68466
6 changed files with 349 additions and 0 deletions
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54
oracles/numerics.php Normal file
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@ -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'."
];
}
}
?>