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Unterbrechung bei laufender Unterbrechung

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This commit is contained in:
cgfhtw
2024-02-21 09:19:56 +01:00
parent 658212a6eb
commit c034efb8b0
4 changed files with 155 additions and 67 deletions
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application/models/education/Studierendenantrag_model.php
+94
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@@ -287,4 +287,98 @@ class Studierendenantrag_model extends DB_Model
return $this->loadWhere($where);
}
/**
* Checks if the Prestudent has an active Unterbrechung between
* the start of the given semester and the given enddate.
* If the enddate is omitted the end of the given semester is used.
*
* @param integer $prestudent_id
* @param string $studiensemester_kurzbz
* @param string $enddate (optional)
*
* @return boolean
*/
public function hasRunningUnterbrechungBetween($prestudent_id, $studiensemester, $enddate = null)
{
$start = '(SELECT start FROM public.tbl_studiensemester WHERE studiensemester_kurzbz=' . $this->db->escape($studiensemester) . ')';
$end = $enddate
? $this->db->escape($enddate)
: '(SELECT ende FROM public.tbl_studiensemester WHERE studiensemester_kurzbz=' . $this->db->escape($studiensemester) . ')';
$this->addJoin('public.tbl_studiensemester', 'studiensemester_kurzbz');
$this->db->where([
'prestudent_id' => $prestudent_id,
'typ' => Studierendenantrag_model::TYP_UNTERBRECHUNG,
'campus.get_status_studierendenantrag(studierendenantrag_id) !=' => Studierendenantragstatus_model::STATUS_CANCELLED,
'start < ' . $end => null,
'datum_wiedereinstieg > ' . $start => null,
]);
return (boolean)$this->db->count_all_results($this->dbTable);
}
/**
* Gets free semester slots for a new Unterbrechung.
*
* @param integer $prestudent_id
* @param string $studiensemester_kurzbz (optional)
*
* @return stdClass
*/
public function getFreeSlotsForUnterbrechung($prestudent_id, $studiensemester = null)
{
$max_starters = 2;
$max_length = max(
2,
(integer)$this->config->item('unterbrecher_semester_max_length')
);
$subquery = '';
if ($studiensemester)
$subquery = 'SELECT start FROM public.tbl_studiensemester WHERE studiensemester_kurzbz=?';
else
$subquery = 'SELECT start FROM public.tbl_studiensemester WHERE studiensemester_kurzbz=public.get_stdsem_prestudent (?, null)';
$sql = "WITH numbered_sems AS (
SELECT
a.studiensemester_kurzbz AS von,
b.studiensemester_kurzbz AS bis,
a.start AS start,
b.start AS ende,
ROW_NUMBER() OVER (
PARTITION BY a.studiensemester_kurzbz
ORDER BY b.start
) AS row_number
FROM public.tbl_studiensemester a
LEFT JOIN public.tbl_studiensemester b ON (b.start > a.ende)
),
last_sems AS (
SELECT *
FROM numbered_sems
WHERE numbered_sems.row_number <= ?
)
SELECT s.von, s.bis, s.start, s.ende, studierendenantrag_id
FROM last_sems s
LEFT JOIN (
SELECT studierendenantrag_id, start, datum_wiedereinstieg AS ende
FROM campus.tbl_studierendenantrag
LEFT JOIN public.tbl_studiensemester USING(studiensemester_kurzbz)
WHERE typ=?
AND campus.get_status_studierendenantrag(studierendenantrag_id) != ?
AND prestudent_id=?
) a ON (s.start < a.ende AND s.ende > a.start)
WHERE s.start >= (" . $subquery . ")
ORDER BY s.start, s.ende
LIMIT ?;";
return $this->execQuery($sql, [
$max_length,
self::TYP_UNTERBRECHUNG,
Studierendenantragstatus_model::STATUS_CANCELLED,
$prestudent_id,
$studiensemester ?: $prestudent_id,
$max_length * $max_starters
]);
}
}