Added wsfunction to issue or get certificate

[indicozy]

Since I'm not familiar with PHP, most of the code is AI generated.

I need help to create dev environment and code review.

I want to create wsfunction that issues (if not found) certificate and returns certificate ID as discussed in #712.

However, it's not working properly, more info in the comment below

[indicozy]

@mdjnelson I created PR for #712, however cURL is not working properly:

curl 'https://moodle.dev/webservice/rest/server.php?wstoken=TOKEN_OF_USER&wsfunction=mod_customcert_get_or_create_certificate&moodlewsrestformat=json&cmid=277' \
  -H 'accept: */*' \
  -H 'accept-language: en-US,en;q=0.9' \
  -H 'origin: http://localhost:5173' \
  -H 'priority: u=1, i' \
  -H 'referer: http://localhost:5173/' \
  -H 'sec-ch-ua: "Not;A=Brand";v="24", "Chromium";v="128"' \
  -H 'sec-ch-ua-mobile: ?0' \
  -H 'sec-ch-ua-platform: "Linux"' \
  -H 'sec-fetch-dest: empty' \
  -H 'sec-fetch-mode: cors' \
  -H 'sec-fetch-site: cross-site' \
  -H 'user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36'

Returns:

{
  "exception": "dml_missing_record_exception",
  "errorcode": "invalidrecordunknown",
  "message": "Не удается найти данную запись в базе данных"
}

I tried to debug it by adding checks and exceptions, however it doesn't change the response's error code. I'm stuck on this stage.

DB info:

INSERT INTO `mdl_course_modules` (`id`, `course`, `module`, `instance`, `section`, `idnumber`, `added`, `score`, `indent`, `visible`, `visibleoncoursepage`, `visibleold`, `groupmode`, `groupingid`, `completion`, `completiongradeitemnumber`, `completionview`, `completionexpected`, `completionpassgrade`, `showdescription`, `availability`, `deletioninprogress`, `downloadcontent`, `lang`) VALUES ('277', '9', '26', '3', '91', '', '1755916142', '0', '0', '1', '1', '1', '0', '0', '0', NULL, '0', '0', '0', '0', NULL, '0', '1', '')

INSERT INTO `mdl_course` (`id`, `category`, `sortorder`, `fullname`, `shortname`, `idnumber`, `summary`, `summaryformat`, `format`, `showgrades`, `newsitems`, `startdate`, `enddate`, `relativedatesmode`, `marker`, `maxbytes`, `legacyfiles`, `showreports`, `visible`, `visibleold`, `downloadcontent`, `groupmode`, `groupmodeforce`, `defaultgroupingid`, `lang`, `calendartype`, `theme`, `timecreated`, `timemodified`, `requested`, `enablecompletion`, `completionnotify`, `cacherev`, `originalcourseid`, `showactivitydates`, `showcompletionconditions`, `pdfexportfont`) VALUES ('9', '3', '30003', 'СЕРВИС. ПРОФЕССИОНАЛЬНЫЙ ИМИДЖ', 'Профессиональный имидж', '', '<p dir=\"ltr\">Этот курс посвящен самым актуальным стратегиям и современным подходам к раннему выявлению и профилактике онкологических заболеваний в условиях первичной медико-санитарной помощи. Вы изучите современные скрининговые программы, методы консультирования пациентов по факторам риска и принципы онконастороженности в ежедневной практике. Курс предназначен для врачей общей практики, терапевтов и фельдшеров, стремящихся повысить эффективность профилактической работы и снизить онкологическую заболеваемость на своем участке.</p>', '1', 'topics', '1', '5', '1753815600', '0', '0', '0', '0', '0', '0', '1', '1', NULL, '0', '0', '0', '', '', '', '1753805401', '1755594415', '0', '1', '0', '1756011550', NULL, '1', '1', NULL)

INSERT INTO `mdl_customcert` (`id`, `course`, `templateid`, `name`, `intro`, `introformat`, `requiredtime`, `verifyany`, `deliveryoption`, `usecustomfilename`, `customfilenamepattern`, `emailstudents`, `emailteachers`, `emailothers`, `protection`, `language`, `timecreated`, `timemodified`) VALUES ('3', '9', '4', 'Сертификат', '', '1', '0', '1', 'I', '0', NULL, '0', '0', '', '', '', '1755916142', '1755916142')

INSERT INTO `mdl_customcert_issues` (`id`, `userid`, `customcertid`, `code`, `emailed`, `timecreated`) VALUES ('4', '3', '3', '2795-0273-6651', '0', '1755920135')

[mdjnelson]

Please see my suggestions in #712. Easiest way to check it is working is by writing unit tests instead of going through the headache of setting up the webservice and testing it. See https://github.com/mdjnelson/moodle-mod_customcert/blob/MOODLE_500_STABLE/tests/external_test.php. Also, no need to update CHANGES.md, ill do that when I release a new version. Thanks!