Calendario embebido

import hashlib
import hmac
from urllib.parse import quote, urlencode

def build_signed_embed_url(agenda_uuid: str, secret: str, params: dict) -> str:
    signable = {
        key: str(value)
        for key, value in (params or {}).items()
        if value not in (None, "")
        and (key == "exp" or key.startswith("prefill_") or key.startswith("metadata_"))
    }
    enc = lambda s: quote(s, safe="")
    canonical = "&".join(f"{enc(key)}={enc(signable[key])}" for key in sorted(signable))
    sig = hmac.new(secret.encode("utf-8"), canonical.encode("utf-8"), hashlib.sha256).hexdigest()
    query = urlencode({"embed": "1", **signable, "sig": sig})
    return f"https://turnito.app/c/{agenda_uuid}?{query}"

<?php
function buildSignedEmbedUrl(string $agendaUuid, string $secret, array $params): string {
    $signable = [];
    foreach ($params as $key => $value) {
        if ($value === null || $value === '') continue;
        if ($key === 'exp' || str_starts_with($key, 'prefill_') || str_starts_with($key, 'metadata_')) {
            $signable[$key] = (string) $value;
        }
    }
    ksort($signable);
    $parts = [];
    foreach ($signable as $key => $value) {
        // rawurlencode ya es RFC 3986.
        $parts[] = rawurlencode($key) . '=' . rawurlencode($value);
    }
    $canonical = implode('&', $parts);
    $sig = hash_hmac('sha256', $canonical, $secret);

    $query = http_build_query(array_merge(['embed' => '1'], $signable, ['sig' => $sig]));
    return "https://turnito.app/c/{$agendaUuid}?{$query}";
}