Fix date format validation: accept YYYY-MM-DD, auto-convert to DD-MM-YYYY for AEAT XSD

[Copilot]

Validators were checking for DD-MM-YYYY via regex but error messages advertised YYYY-MM-DD, causing a paradoxical failure when users supplied the documented format. The AEAT XSD schema requires DD-MM-YYYY, but PHP's native date('Y-m-d') returns YYYY-MM-DD.

Changes

• Validators (InvoiceId, InvoiceSubmission): Changed all date regexes from DD-MM-YYYY to YYYY-MM-DD (ISO 8601). Error messages now match what's actually accepted.
• Serializer (InvoiceSerializer): Added formatDate() helper that converts YYYY-MM-DD → DD-MM-YYYY before writing to XML, preserving XSD compliance transparently. Applied to all date fields: FechaExpedicionFactura, FechaOperacion, rectified/substituted invoice dates, chaining previous invoice dates, cancellation dates, and query dates.
• Tests: Updated all hardcoded DD-MM-YYYY date strings and date('d-m-Y') calls to YYYY-MM-DD / date('Y-m-d'). Serializer test XML output assertions remain DD-MM-YYYY (correct expected output).

Example

// Previously failed validation with "Must be a valid date (YYYY-MM-DD)"
$invoice->operationDate = '2025-10-10';  // now passes
$invoiceId->issueDate   = '2025-10-10';  // now passes

// Serializer outputs correct DD-MM-YYYY in XML automatically:
// <sf:FechaOperacion>10-10-2025</sf:FechaOperacion>

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/Bacon/BaconQrCode/zipball/36a1cb2b81493fa5b82e50bf8068bf84d1542563
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/DASPRiD/Enum/zipball/b5874fa9ed0043116c72162ec7f4fb50e02e7cce
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/nikic/PHP-Parser/zipball/50f0d9c9d0e3cff1163c959c50aaaaa4a7115f08
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/phpstan/phpstan/zipball/3222c523fdb250b9f9a1f6d36f10e653c2d1b2e8
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/cli-parser/zipball/079406160fa9290d5a7f585602e0fe5b5f003756
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/code-unit-reverse-lookup/zipball/9f7c12369107fdb7a91016bf88f27d39872a88ea
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/code-unit/zipball/807b5e65ab7b7b16e1928d924c7973aa451fa295
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/comparator/zipball/8d8209833d5f3f3eb8da4401a975302c58da4e64
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/complexity/zipball/72cbad467aed5fc740e4e4c00218f4f4a6ad4297
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/diff/zipball/74776e712e4b0c27d7e421b88af13875adb5999b
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/lines-of-code/zipball/f3a9f1083457e342c2f9a0b577c511d9c20be488
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/ded04261fddbfb6755b7176685fd7975b874a128
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/e16b906e486daae949005a62576318be23e31670
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/11775ba4125a1e8ab6ab9c21e0607d9a484744dd
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/97ecb4b0a29cf3befdf5bef6d7c5872a5f7129b4
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/php-invoker/zipball/d1ddfa07b25ece41c8e5ee3f3bdd4fd969b0b395
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/php-text-template/zipball/33ec41b1b3bc7b06f3e5443183d5be875a6a613c
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/php-timer/zipball/fb4639c8b216b81813c588d0adf1fe88ec66239e
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/2b64fcfd962e68d303f86608aca2cf882adbca74
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/type/zipball/68153740a6f11fc82a96e260ef47041967ee1c58
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/sebastianbergmann/version/zipball/c8104a729707d949f2132fad0a41c42b7cac080f
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/jjY3od /usr/bin/composer install (http block)
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/symfony/polyfill-ctype/zipball/a3cc8b044a6ea513310cbd48ef7333b384945638
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• https://api.github.com/repos/theseer/tokenizer/zipball/b7489ce515e168639d17feec34b8847c326b0b3c
  • Triggering command: /usr/bin/php8.3 /usr/bin/php8.3 -n -c /tmp/k9nSc4 /usr/bin/composer install --no-scripts (http block)
• www.w3.org
  • Triggering command: /usr/bin/php php /usr/local/bin/phpunit --testsuite=Unit git ls-f�� --exclude-standa/home/REDACTED/.cache/composer/vcs/https---github.com-sebastianbergmann-code-unit-bash --others mann/object-reflector.git /https---github.git (dns block)
  • Triggering command: /usr/bin/php php /usr/local/bin/phpunit --testsuite=Unit git bran�� -a --no-color mann/code-unit.git /https---github.sh (dns block)
  • Triggering command: /usr/bin/php php /usr/local/bin/phpunit --testsuite=Unit owner --uid-owner 0 -j ACCEPT (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Error validación operationDate</issue_title>
<issue_description>Error validación operationDate
Array ( [eseperio\verifactu\models\InvoiceSubmission::$operationDate] => Array ( [0] => Must be a valid date (YYYY-MM-DD). ) )

Cuando en ese campo tengo:
$invoice->operationDate = '2025-10-10'; // Operation date

</issue_description>

<agent_instructions>Check this, since looks like a real problem where code is using american date format instead of european one. </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Error validación operationDate #35

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.