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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 $field
* Field data.
*
* @return
* Next repetition entry and result.
*/
public function nextRepetition($field, $entry = 1) {
foreach(new IsisEntryIterator($this, $entry) as $entry => $result) {
if (count($this->getValues($field)) >= 2) {
return array($entry, $result);
}
}
return FALSE;
}
/**
* Find the next occurrence of a field.
*
* @param $entry
* Start entry number to begin the search.
*
* @param $field
* Field data.
*
* @return
* Next occurrence.
*/
public function nextField($field, $entry = 1) {
foreach(new IsisEntryIterator($this, $entry) as $entry => $result) {
if (count($this->getValues($field)) > 0) {
return array($entry, $result);
}
}
return FALSE;
}
/**
* Find the next occurrence of a subfield.
*
* @param $entry
* Start entry number to begin the search.
*
* @param $field
* Field data.
*
* @param $subfield
* Subfield name.
*
* @return
* Next occurrence.
*/
public function nextSubfield($field, $subfield, $entry = 1) {
foreach(new IsisEntryIterator($this, $entry) as $entry => $result) {
if ($this->hasSubfieldInRows($field, $subfield) !== FALSE) {
return array($entry, $result);
}
}
return FALSE;
}
/**
* 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;
}
/**
* Search the next match inside a result.
*
* @param $field
* Field data.
*
* @param $item
* Item name (main field or subfield).
*
* @param $search
* Search token.
*
* @param $entry
* Start entry number to begin the search.
*
* @param $match
* Set to false do find the next result where the
* item has not the token specified in $search.
*/
public function nextResult($field, $item, $search, $entry = 1, $match = TRUE) {
do {
// Get the next entry that has the field/subfield we'll look at.
if ($item = 'main') {
$next = $this->nextField($field, $entry);
}
else {
$next = $this->nextSubfield($field, $item, $entry);
}
// Check if there's a next matching field/subfield.
if ($next === FALSE) {
break;
}
else {
list($entry, $result) = $next;
}
// Search for any occurrence.
foreach (new IsisRowIterator($this, $field) as $row) {
if ($item = 'main') {
$verify = $this->matchMainItem($field, $row, $search, $match);
}
else {
$verify = $this->matchSubfield($field, $row, $search, $match);
}
if ($verify !== FALSE)
{
return array($entry, $result);
}
}
} while ($entry++ && $entry <= $this->entries);
}
/**
* Check if a main item match a given value.
*
* @param $field
* Field data.
*
* @param $row
* Row number.
*
* @param $search
* Search token.
*
* @param $match
* Set to false do find the next result where the
* item has not the token specified in $search.
*
* @return
* True if match, false otherwise.
*/
public function matchMainItem($field, $row, $search, $match) {
if ($this->getMainItem($field, $row) == $search) {
if ($match) {
return TRUE;
}
}
elseif (!$match) {
return TRUE;
}
return FALSE;
}
/**
* Check if a subfield match a given value.
*
* @param $field
* Field data.
*
* @param $subfield
* Subfield name.
*
* @param $row
* Row number.
*
* @param $search
* Search token.
*
* @param $match
* Set to false do find the next result where the
* item has not the token specified in $search.
*
* @return
* True if match, false otherwise.
*/
public function matchSubfield($field, $subfield, $row, $search, $match) {
if ($this->getSubfield($field, $subfield, $row) == $search) {
if ($match) {
return TRUE;
}
elseif (!$match) {
return TRUE;
}
}
return FALSE;
}
}
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