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<?php
/**
* Provides Isis Database search methods.
*/
class IsisFinder extends IsisConnector {
/**
* Find the next repetition of a field.
*
* @param $entry
* Start entry number to begin the search.
*
* @param $field
* Field name.
*
* @return
* Next repetition entry and result.
*/
public function nextRepetition($entry = 1, $field) {
$entry--;
// Query database.
do {
$result = $this->read(++$entry);
if ($entry == $entries) {
break;
}
} while (!isset($result[$field]) || count($result[$field]) < 2);
if (!isset($result[$field]) || count($result[$field]) < 2) {
return FALSE;
}
return array($entry, $result);
}
/**
* Find the next occurrence of a field.
*
* @param $entry
* Start entry number to begin the search.
*
* @param $field
* Field name.
*
* @return
* Next occurrence.
*/
public function nextField($entry = 1, $field) {
$entry--;
// Query database.
do {
$result = $this->read(++$entry);
if ($entry == $entries) {
break;
}
} while (!isset($result[$field]));
if (!isset($result[$field])) {
return FALSE;
}
return array($entry, $result);
}
/**
* Find the next occurrence of a subfield.
*
* @param $entry
* Start entry number to begin the search.
*
* @param $field
* Field name.
*
* @param $subfield
* Subfield name.
*
* @return
* Next occurrence.
*
* @todo
* Test.
*/
public function nextSubfield($entry = 1, $field, $subfield) {
$entry--;
// Query database.
do {
$result = $this->read(++$entry);
if ($entry == $entries) {
break;
}
$has = $this->hasSubfieldInRows($field, $subfield);
} while ($has === FALSE);
if (!isset($result[$field][$has][$subfield])) {
return FALSE;
}
return array($entry, $result);
}
/**
* Check if a field result has a given subfield.
*
* @param $field
* Field data.
*
* @param $subfield
* Subfield.
*
* @return
* True if result has the subfield, false otherwise.
*/
public function hasSubfieldInRows($field, $subfield) {
foreach (new IsisRowIterator($this, $field) as $row) {
if ($this->hasSubfield($field, $subfield, $row)) {
return $row;
}
}
return FALSE;
}
}
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