/**
* 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_GENERATE_HTML;
/// These are always here
global $CFG, $XMLDB, $DB, $OUTPUT;
/// Do the job, setting result as needed
/// Get the dir containing the file
$dirpath = required_param('dir', PARAM_PATH);
$dirpath = $CFG->dirroot . $dirpath;
/// Get the correct dirs
if (!empty($XMLDB->dbdirs)) {
$dbdir =& $XMLDB->dbdirs[$dirpath];
} else {
return false;
}
if (!empty($XMLDB->editeddirs)) {
$editeddir =& $XMLDB->editeddirs[$dirpath];
$structure =& $editeddir->xml_file->getStructure();
}
/// ADD YOUR CODE HERE
$tableparam = optional_param('table', NULL, PARAM_CLEAN);
$typeparam = optional_param('type', NULL, PARAM_CLEAN);
/// If no table or type, show form
if (!$tableparam || !$typeparam) {
/// No postaction here
$this->postaction = NULL;
/// Get list of tables
$selecttables = $DB->get_tables();
/// Get list of statement types
$typeoptions = array(XMLDB_STATEMENT_INSERT => xmldb_statement::getXMLDBStatementName(XMLDB_STATEMENT_INSERT), XMLDB_STATEMENT_UPDATE => xmldb_statement::getXMLDBStatementName(XMLDB_STATEMENT_UPDATE), XMLDB_STATEMENT_DELETE => xmldb_statement::getXMLDBStatementName(XMLDB_STATEMENT_DELETE), XMLDB_STATEMENT_CUSTOM => xmldb_statement::getXMLDBStatementName(XMLDB_STATEMENT_CUSTOM));
if (!$selecttables) {
$this->errormsg = 'No tables available to create statements';
return false;
}
/// Now build the form
$o = '<form id="form" action="index.php" method="post">';
$o .= '<div>';
$o .= ' <input type="hidden" name ="dir" value="' . str_replace($CFG->dirroot, '', $dirpath) . '" />';
$o .= ' <input type="hidden" name ="action" value="new_statement" />';
$o .= ' <input type="hidden" name ="postaction" value="edit_statement" />';
$o .= ' <table id="formelements" class="boxaligncenter" cellpadding="5">';
$o .= ' <tr><td><label for="type" accesskey="t">' . $this->str['statementtype'] . ' </label>' . $OUTPUT->select(html_select::make($typeoptions, 'type')) . '<label for="table" accesskey="a">' . $this->str['statementtable'] . ' </label>' . $OUTPUT->select(html_select::make($selecttables, 'table')) . '</td></tr>';
$o .= ' <tr><td colspan="2" align="center"><input type="submit" value="' . $this->str['create'] . '" /></td></tr>';
$o .= ' <tr><td colspan="2" align="center"><a href="index.php?action=edit_xml_file&dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '">[' . $this->str['back'] . ']</a></td></tr>';
$o .= ' </table>';
$o .= '</div></form>';
$this->output = $o;
/// If table, retrofit information and, if everything works,
/// go to the table edit action
} else {
/// Get some params (table is mandatory here)
$tableparam = required_param('table', PARAM_CLEAN);
$typeparam = required_param('type', PARAM_CLEAN);
/// Only insert is allowed :-/
if ($typeparam != XMLDB_STATEMENT_INSERT) {
$this->errormsg = 'Only insert of records is supported';
return false;
}
/// Calculate the name of the statement
$typename = xmldb_statement::getXMLDBStatementName($typeparam);
$name = trim(strtolower($typename . ' ' . $tableparam));
/// Check that this Statement hasn't been created before
if ($structure->getStatement($name)) {
$this->errormsg = 'The statement "' . $name . '" already exists, please use it to add more sentences';
return false;
}
/// Create one new xmldb_statement
$statement = new xmldb_statement($name);
$statement->setType($typeparam);
$statement->setTable($tableparam);
$statement->setComment('Initial ' . $typename . ' of records on table ' . $tableparam);
/// Finally, add the whole retroffited table to the structure
/// in the place specified
$structure->addStatement($statement);
}
/// Launch postaction if exists (leave this here!)
if ($this->getPostAction() && $result) {
return $this->launch($this->getPostAction());
}
/// Return ok if arrived here
return $result;
}
