/**
* Invoke method, every class will have its own
* returns true/false on completion, setting both
* errormsg and output as necessary
*/
function invoke()
{
parent::invoke();
$result = true;
/// Set own core attributes
$this->does_generate = ACTION_NONE;
//$this->does_generate = ACTION_GENERATE_HTML;
/// These are always here
global $CFG, $XMLDB;
/// Do the job, setting result as needed
if (!data_submitted('nomatch')) {
///Basic prevention
error('Wrong action call');
}
/// Get parameters
$dirpath = required_param('dir', PARAM_PATH);
$dirpath = $CFG->dirroot . stripslashes_safe($dirpath);
$tableparam = strtolower(required_param('table', PARAM_PATH));
$fieldparam = strtolower(required_param('field', PARAM_PATH));
$name = substr(trim(strtolower(optional_param('name', $fieldparam, PARAM_PATH))), 0, 30);
$comment = required_param('comment', PARAM_CLEAN);
$comment = trim(stripslashes_safe($comment));
$type = required_param('type', PARAM_INT);
$length = strtolower(optional_param('length', NULL, PARAM_ALPHANUM));
$decimals = optional_param('decimals', NULL, PARAM_INT);
$unsigned = optional_param('unsigned', false, PARAM_BOOL);
$notnull = optional_param('notnull', false, PARAM_BOOL);
$sequence = optional_param('sequence', false, PARAM_BOOL);
$enum = optional_param('enum', false, PARAM_BOOL);
$enumvalues = optional_param('enumvalues', 0, PARAM_CLEAN);
$enumvalues = trim(stripslashes_safe($enumvalues));
$default = optional_param('default', NULL, PARAM_PATH);
$default = trim(stripslashes_safe($default));
$editeddir =& $XMLDB->editeddirs[$dirpath];
$structure =& $editeddir->xml_file->getStructure();
$table =& $structure->getTable($tableparam);
$field =& $table->getField($fieldparam);
$oldhash = $field->getHash();
$errors = array();
/// To store all the errors found
/// Perform some automatic asumptions
if ($sequence) {
$unsigned = true;
$notnull = true;
$enum = false;
$default = NULL;
}
if ($type != XMLDB_TYPE_NUMBER && $type != XMLDB_TYPE_FLOAT) {
$decimals = NULL;
}
if ($type != XMLDB_TYPE_CHAR && $type != XMLDB_TYPE_TEXT) {
$enum = false;
}
if ($type == XMLDB_TYPE_BINARY) {
$default = NULL;
}
if (!$enum) {
$enumvalues = NULL;
}
if ($default === '') {
$default = NULL;
}
/// Perform some checks
/// Check empty name
if (empty($name)) {
$errors[] = $this->str['fieldnameempty'];
}
/// Check incorrect name
if ($name == 'changeme') {
$errors[] = $this->str['incorrectfieldname'];
}
/// Check duplicate name
if ($fieldparam != $name && $table->getField($name)) {
$errors[] = $this->str['duplicatefieldname'];
}
/// Integer checks
if ($type == XMLDB_TYPE_INTEGER) {
if (!(is_numeric($length) && !empty($length) && intval($length) == floatval($length) && $length > 0 && $length <= 20)) {
$errors[] = $this->str['integerincorrectlength'];
}
if (!(empty($default) || is_numeric($default) && !empty($default) && intval($default) == floatval($default))) {
$errors[] = $this->str['defaultincorrect'];
}
}
/// Number checks
if ($type == XMLDB_TYPE_NUMBER) {
if (!(is_numeric($length) && !empty($length) && intval($length) == floatval($length) && $length > 0 && $length <= 20)) {
$errors[] = $this->str['numberincorrectlength'];
}
if (!(empty($decimals) || is_numeric($decimals) && !empty($decimals) && intval($decimals) == floatval($decimals) && $decimals >= 0 && $decimals < $length)) {
$errors[] = $this->str['numberincorrectdecimals'];
}
if (!(empty($default) || is_numeric($default) && !empty($default))) {
$errors[] = $this->str['defaultincorrect'];
}
}
/// Float checks
if ($type == XMLDB_TYPE_FLOAT) {
if (!(empty($length) || is_numeric($length) && !empty($length) && intval($length) == floatval($length) && $length > 0 && $length <= 20)) {
$errors[] = $this->str['floatincorrectlength'];
}
if (!(empty($decimals) || is_numeric($decimals) && !empty($decimals) && intval($decimals) == floatval($decimals) && $decimals >= 0 && $decimals < $length)) {
$errors[] = $this->str['floatincorrectdecimals'];
}
if (!(empty($default) || is_numeric($default) && !empty($default))) {
$errors[] = $this->str['defaultincorrect'];
}
}
/// Char checks
if ($type == XMLDB_TYPE_CHAR) {
if (!(is_numeric($length) && !empty($length) && intval($length) == floatval($length) && $length > 0 && $length <= 255)) {
$errors[] = $this->str['charincorrectlength'];
}
if ($default !== NULL && $default !== '') {
if (substr($default, 0, 1) == "'" || substr($default, -1, 1) == "'") {
$errors[] = $this->str['defaultincorrect'];
}
}
}
/// Text checks
if ($type == XMLDB_TYPE_TEXT) {
if ($length != 'small' && $length != 'medium' && $length != 'big') {
$errors[] = $this->str['textincorrectlength'];
}
if ($default !== NULL && $default !== '') {
if (substr($default, 0, 1) == "'" || substr($default, -1, 1) == "'") {
$errors[] = $this->str['defaultincorrect'];
}
}
}
/// Binary checks
if ($type == XMLDB_TYPE_BINARY) {
if ($length != 'small' && $length != 'medium' && $length != 'big') {
$errors[] = $this->str['binaryincorrectlength'];
}
}
/// Enum checks
if ($enum) {
$enumerr = false;
$enumarr = explode(',', $enumvalues);
$maxlength = 0;
if ($enumarr) {
foreach ($enumarr as $key => $enumelement) {
/// Clear some spaces
$enumarr[$key] = trim($enumelement);
$enumelement = trim($enumelement);
/// Calculate needed length
$le = strlen(str_replace("'", '', $enumelement));
if ($le > $maxlength) {
$maxlength = $le;
}
/// Skip if under error
if ($enumerr) {
continue;
}
/// Look for quoted strings
if (substr($enumelement, 0, 1) != "'" || substr($enumelement, -1, 1) != "'") {
$enumerr = true;
}
}
} else {
$enumerr = true;
}
if ($enumerr) {
$errors[] = $this->str['enumvaluesincorrect'];
} else {
$enumvalues = $enumarr;
}
if ($length < $maxlength) {
$errors[] = $this->str['wronglengthforenum'];
}
}
if (!empty($errors)) {
$tempfield = new XMLDBField($name);
$tempfield->setType($type);
$tempfield->setLength($length);
$tempfield->setDecimals($decimals);
$tempfield->setUnsigned($unsigned);
$tempfield->setNotNull($notnull);
$tempfield->setSequence($sequence);
$tempfield->setEnum($enum);
$tempfield->setEnumValues($enumvalues);
$tempfield->setDefault($default);
/// Prepare the output
$site = get_site();
$navlinks = array();
$navlinks[] = array('name' => $this->str['administration'], 'link' => '../index.php', 'type' => 'misc');
$navlinks[] = array('name' => 'XMLDB', 'link' => 'index.php', 'type' => 'misc');
$navigation = build_navigation($navlinks);
print_header("{$site->shortname}: XMLDB", "{$site->fullname}", $navigation);
notice('<p>' . implode(', ', $errors) . '</p>
<p>' . $tempfield->readableInfo(), 'index.php?action=edit_field&field=' . $field->getName() . '&table=' . $table->getName() . '&dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)));
die;
/// re-die :-P
}
/// Continue if we aren't under errors
if (empty($errors)) {
/// If there is one name change, do it, changing the prev and next
/// atributes of the adjacent fields
if ($fieldparam != $name) {
$field->setName($name);
if ($field->getPrevious()) {
$prev =& $table->getField($field->getPrevious());
$prev->setNext($name);
$prev->setChanged(true);
}
if ($field->getNext()) {
$next =& $table->getField($field->getNext());
$next->setPrevious($name);
$next->setChanged(true);
}
}
/// Set comment
$field->setComment($comment);
/// Set the rest of fields
$field->setType($type);
$field->setLength($length);
$field->setDecimals($decimals);
$field->setUnsigned($unsigned);
$field->setNotNull($notnull);
$field->setSequence($sequence);
$field->setEnum($enum);
$field->setEnumValues($enumvalues);
$field->setDefault($default);
/// If the hash has changed from the old one, change the version
/// and mark the structure as changed
$field->calculateHash(true);
if ($oldhash != $field->getHash()) {
$field->setChanged(true);
$table->setChanged(true);
/// Recalculate the structure hash
$structure->calculateHash(true);
$structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
/// Mark as changed
$structure->setChanged(true);
}
/// Launch postaction if exists (leave this here!)
if ($this->getPostAction() && $result) {
return $this->launch($this->getPostAction());
}
}
/// Return ok if arrived here
return $result;
}
