<?php // $Id: XMLDBConstants.php 68 2009-07-31 18:23:01Z dlandau $

///////////////////////////////////////////////////////////////////////////
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// Moodle - Modular Object-Oriented Dynamic Learning Environment         //
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///////////////////////////////////////////////////////////////////////////

/// This file contains all the constants and variables used
/// by the XMLDB interface

/// First, some constants to be used by actions
    define('ACTION_NONE',             0);  //Default flags for class
    define('ACTION_GENERATE_HTML',    1);  //The invoke function will return HTML
    define('ACTION_GENERATE_XML',     2);  //The invoke function will return HTML
    define('ACTION_HAVE_SUBACTIONS',  1);  //The class can have subaction

/// Now the allowed DB Field Types
    define ('XMLDB_TYPE_INCORRECT',   0);  //Wrong DB Type
    define ('XMLDB_TYPE_INTEGER',     1);  //Integer
    define ('XMLDB_TYPE_NUMBER',      2);  //Decimal number
    define ('XMLDB_TYPE_FLOAT',       3);  //Floating Point number
    define ('XMLDB_TYPE_CHAR',        4);  //String
    define ('XMLDB_TYPE_TEXT',        5);  //Text
    define ('XMLDB_TYPE_BINARY',      6);  //Binary
    define ('XMLDB_TYPE_DATETIME',    7);  //Datetime
    define ('XMLDB_TYPE_TIMESTAMP',   8);  //Timestamp

/// Now the allowed DB Keys
    define ('XMLDB_KEY_INCORRECT',     0);  //Wrong DB Key
    define ('XMLDB_KEY_PRIMARY',       1);  //Primary Keys
    define ('XMLDB_KEY_UNIQUE',        2);  //Unique Keys
    define ('XMLDB_KEY_FOREIGN',       3);  //Foreign Keys
    define ('XMLDB_KEY_CHECK',         4);  //Check Constraints - NOT USED!
    define ('XMLDB_KEY_FOREIGN_UNIQUE',5);  //Foreign Key + Unique Key

/// Now the allowed Statement Types
    define ('XMLDB_STATEMENT_INCORRECT',   0);  //Wrong Statement Type
    define ('XMLDB_STATEMENT_INSERT',      1);  //Insert Statements
    define ('XMLDB_STATEMENT_UPDATE',      2);  //Update Statements
    define ('XMLDB_STATEMENT_DELETE',      3);  //Delete Statements
    define ('XMLDB_STATEMENT_CUSTOM',      4);  //Custom Statements

/// Some other useful Constants
    define ('XMLDB_UNSIGNED',        true);  //If the field is going to be unsigned
    define ('XMLDB_NOTNULL',         true);  //If the field is going to be not null
    define ('XMLDB_SEQUENCE',        true);  //If the field is going to be a sequence
    define ('XMLDB_ENUM',            true);  //If the field is going to be a enumeration of possible fields
    define ('XMLDB_INDEX_UNIQUE',    true);  //If the index is going to be unique
    define ('XMLDB_INDEX_NOTUNIQUE',false);  //If the index is NOT going to be unique

/// Some strings used widely
    define ('XMLDB_LINEFEED', "\n");
    define ('XMLDB_PHP_HEADER', '    if ($result && $oldversion < XXXXXXXXXX) {' . XMLDB_LINEFEED);
    define ('XMLDB_PHP_FOOTER', '    }' . XMLDB_LINEFEED);
?>
