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<?php
/**
* IsisConnector: provides an easy interface to connect an
* application with Cinisis.
*/
class IsisConnector {
/**
* Constructor.
*/
public function __construct() {
$this->isis = new CinisisDb();
if ($this->isis->db) {
$this->rows = $this->isis->db->rows();
$this->format = $this->isis->db->format;
$this->fields = $this->format['fields'];
}
else {
return FALSE;
}
}
/**
* Alias to $isis->db->read().
*
* @param $row
* Row number.
*
* @return
* Resulting data.
*/
public function read($row) {
// Always store the last result.
$this->result = $this->isis->db->read($row);
// Return the result.
return $this->result;
}
/**
* Get all values of a given field.
*
* @param $field
* Field array.
*
* @return
* Field data.
*/
public function getFields($field) {
if (isset($this->result[$field['name']])) {
return $this->result[$field['name']];
}
}
/**
* Get the value of a given field.
*
* @param $field
* Field array.
*
* @param $row
* Optional row number if repetitive field.
*
* @return
* Field data.
*/
public function getField($field, $row = 0) {
if (isset($this->result[$field['name']][$row]['field'])) {
return $this->result[$field['name']][$row]['field'];
}
}
/**
* Get the value of a given subfield.
*
* @param $field
* Field array.
*
* @param $subfield
* Subfield name.
*
* @param $row
* Row number if repetitive data.
*
* @return
* Subfield data.
*/
public function getSubfield($field, $subfield, $row = 0) {
if (isset($this->result[$field['name']][$row]['subfields'][$subfield])) {
return $this->result[$field['name']][$row]['subfields'][$subfield];
}
}
/**
* Get the list of subfields from a given field.
*
* @param $field
* Field array.
*/
public function getSubfields($field) {
if (isset($field['subfields'])) {
return $field['subfields'];
}
return array();
}
/**
* Determine which model field an ISIS db field should be mapped to.
* When importing an ISIS database to another system, a mapping
* provided in the database schema can be used to put the originating
* entries (fields and subfields) in the right place at the destination
* database.
*
* Map format:
*
* map:
* type: relation
*
* map:
* type: value
* field: dest
* subfields:
* a: dest
* b: dest
*
* Examples:
*
* map:
* type: Performer
*
* map:
* type: value
* field: title
* subfields:
* a: subtitle
*
* @param $field
* Field array.
*
* @param $subfield
* Subfield name.
*
* @return
* A map destination to the field or subfield.
*
* @todo
* Convert field and subfield names to valid field names.
*/
public function getMap($field, $subfield = NULL) {
if ($subfield == NULL) {
if (isset($field['map']['field'])) {
// Custom map provided.
$dest = 'set'. ucfirst($field['map']['field']);
}
else {
// Default map.
$dest = 'set'. ucfirst($field['name']);
}
}
else {
$key = $this->getSubfieldKey($field, $subfield);
if (isset($field['map']['subfields'][$key])) {
// Custom map provided.
$dest = 'set'. ucfirst($field['map']['subfields'][$key]);
}
else {
// Default map.
$dest = 'set'. ucfirst($subfield);
}
}
return $dest;
}
/**
* Get the mapping type of a given field.
*
* @param $field
* Field array.
*
* @return
* The mapping type.
*/
public function getMapType($field) {
return isset($field['map']['type']) ? $field['map']['type'] : FALSE;
}
/**
* Check on an ISIS schema whether a field has a map.
*
* @param $field
* Field array.
*
* @return
* TRUE if field has a map, FALSE otherwise.
*/
public function fieldHasMap($field) {
if (isset($field['map']['field'])) {
return TRUE;
}
return FALSE;
}
/**
* Check on an ISIS schema whether a subfield has a map.
*
* @param $field
* Field array.
*
* @param $subfield
* Subfield name.
*
* @return
* TRUE if subfield has a map, FALSE otherwise.
*/
public function subfieldHasMap($field, $subfield) {
if (isset($field['map']['subfields'])) {
$key = $this->getSubfieldKey($field, $subfield);
if (isset($field['map']['subfields'][$key])) {
return TRUE;
}
}
return FALSE;
}
/**
* Get the key of a subfield entry.
*
* @param $field
* Field array.
*
* @param $subfield
* Subfield name.
*
* @return
* Subfield keys.
*/
public function getSubfieldKey($field, $subfield) {
$keys = array_flip($field['subfields']);
if (isset($keys[$subfield])) {
return $keys[$subfield];
}
}
}
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