<?php
/* $Id: tbl_relation.php,v 1.39 2003/10/21 17:08:20 lem9 Exp $ */
// vim: expandtab sw=4 ts=4 sts=4:

/**
 * Gets some core libraries
 */
require('./libraries/grab_globals.lib.php');
require('./libraries/common.lib.php');
require('./tbl_properties_common.php');
$url_query .= '&amp;goto=tbl_properties.php';

// Note: in tbl_properties_table_info we get and display the table comment.
// For InnoDB, this comment contains the REFER information but any update
// has not been done yet (will be done in tbl_relation later).
$avoid_show_comment = TRUE;
require('./tbl_properties_table_info.php');
require('./libraries/relation.lib.php');

$options_array = array('CASCADE' => 'CASCADE', 'SET_NULL' => 'SET NULL', 'NO_ACTION' => 'NO ACTION', 'RESTRICT' => 'RESTRICT');

         /**
         * Generate dropdown choices 
         *
         * @param   string   Message to display 
         * @param   string   Name of the <select> field
         * @param   array    Choices for dropdown
         * @return  string   The existing value (for selected)
         *
         * @access  public
         */
function PMA_generate_dropdown($dropdown_question,$radio_name,$choices,$selected_value) {
    global $font_smallest;

    echo $dropdown_question . '&nbsp;&nbsp;';

    echo '<select name="' . $radio_name . '" style="font-size: ' . $font_smallest . '">' . "\n";
    echo '<option value="nix" style="font-size: ' . $font_smallest . '" >--</option>' . "\n";

    while (list($one_value, $one_label) = each($choices)) {
        echo '<option value="' . $one_value . '"';
        if ($selected_value == $one_value) {
            echo ' selected="selected" ';
        }
        echo ' style="font-size: ' . $font_smallest . '">' . $one_label . '</option>' . "\n";
    }
    echo '</select>' . "\n";
    echo "\n";
}


/**
 * Gets the relation settings
 */
$cfgRelation = PMA_getRelationsParam();


/**
 * Updates
 */

if ($cfgRelation['relwork']) {
    $existrel = PMA_getForeigners($db, $table, '', 'internal');
    if ($tbl_type=='INNODB') {
        $existrel_innodb = PMA_getForeigners($db, $table, '', 'innodb');
    }
}
if ($cfgRelation['displaywork']) {
    $disp     = PMA_getDisplayField($db, $table);
}
if ($cfgRelation['relwork']
    && isset($submit_rel) && $submit_rel == 'true') {

    // u p d a t e s   f o r   I n t e r n a l    r e l a t i o n s

    while (list($master_field, $foreign_string) = each($destination)) {
        if ($foreign_string != 'nix') {
            list($foreign_db, $foreign_table, $foreign_field) = explode('.', $foreign_string);
            if (!isset($existrel[$master_field])) {
                $upd_query  = 'INSERT INTO ' . PMA_backquote($cfgRelation['relation'])
                            . '(master_db, master_table, master_field, foreign_db, foreign_table, foreign_field)'
                            . ' values('
                            . '\'' . PMA_sqlAddslashes($db) . '\', '
                            . '\'' . PMA_sqlAddslashes($table) . '\', '
                            . '\'' . PMA_sqlAddslashes($master_field) . '\', '
                            . '\'' . PMA_sqlAddslashes($foreign_db) . '\', '
                            . '\'' . PMA_sqlAddslashes($foreign_table) . '\','
                            . '\'' . PMA_sqlAddslashes($foreign_field) . '\')';
            } else if ($existrel[$master_field]['foreign_db'] . '.' .$existrel[$master_field]['foreign_table'] . '.' . $existrel[$master_field]['foreign_field'] != $foreign_string) {
                $upd_query  = 'UPDATE ' . PMA_backquote($cfgRelation['relation']) . ' SET'
                            . ' foreign_db       = \'' . PMA_sqlAddslashes($foreign_db) . '\', '
                            . ' foreign_table    = \'' . PMA_sqlAddslashes($foreign_table) . '\', '
                            . ' foreign_field    = \'' . PMA_sqlAddslashes($foreign_field) . '\' '
                            . ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
                            . ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
                            . ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
            } // end if... else....
        } else if (isset($existrel[$master_field])) {
            $upd_query      = 'DELETE FROM ' . PMA_backquote($cfgRelation['relation'])
                            . ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
                            . ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
                            . ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
        } // end if... else....
        if (isset($upd_query)) {
            $upd_rs         = PMA_query_as_cu($upd_query);
            unset($upd_query);
        }
    } // end while


    // u p d a t e s   f o r   I n n o D B 
    // ( for now, same db only, and one index name)
    if (isset($destination_innodb)) {
        while (list($master_field, $foreign_string) = each($destination_innodb)) {
            if ($foreign_string != 'nix') {
                list($foreign_db, $foreign_table, $foreign_field) = explode('.', $foreign_string);
                if (!isset($existrel_innodb[$master_field])) {
                    // no key defined for this field

                    // The next few lines are repeated below, so they
                    // could be put in an include file
                    $upd_query  = 'ALTER TABLE ' . $table 
                                . ' ADD FOREIGN KEY ('
                                . PMA_sqlAddslashes($master_field) . ')'
                                . ' REFERENCES '
                                . PMA_sqlAddslashes($foreign_table) . '('
                                . PMA_sqlAddslashes($foreign_field) . ')'; 

                    if (${$master_field . '_on_delete'} != 'nix') {
                        $upd_query   .= ' ON DELETE ' . $options_array[${$master_field . '_on_delete'}];
                    }
                    if (${$master_field . '_on_update'} != 'nix') {
                        $upd_query   .= ' ON UPDATE ' . $options_array[${$master_field . '_on_update'}];
                    }

                    // end repeated code

                } else if (($existrel_innodb[$master_field]['foreign_db'] . '.' .$existrel_innodb[$master_field]['foreign_table'] . '.' . $existrel_innodb[$master_field]['foreign_field'] != $foreign_string) 
                  || ( ${$master_field . '_on_delete'} != (!empty($existrel_innodb[$master_field]['on_delete']) ? $existrel_innodb[$master_field]['on_delete'] : '')) 
                  || ( ${$master_field . '_on_update'} != (!empty($existrel_innodb[$master_field]['on_update']) ? $existrel_innodb[$master_field]['on_update'] : '')) 
                       ) {
                    // another foreign key is already defined for this field
                    // or 
                    // an option has been changed for ON DELETE or ON UPDATE

                    // remove existing key
                    if (PMA_MYSQL_INT_VERSION >= 40013) {
                        $upd_query  = 'ALTER TABLE ' . $table 
                                    . ' DROP FOREIGN KEY '
                                    . $existrel_innodb[$master_field]['constraint'];

                        // I tried to send both in one query but it failed
                        $upd_rs         = PMA_mysql_query($upd_query);
                    }

                    // add another
                    $upd_query  = 'ALTER TABLE ' . $table 
                                . ' ADD FOREIGN KEY ('
                                . PMA_sqlAddslashes($master_field) . ')'
                                . ' REFERENCES '
                                . PMA_sqlAddslashes($foreign_table) . '('
                                . PMA_sqlAddslashes($foreign_field) . ')'; 

                    if (${$master_field . '_on_delete'} != 'nix') {
                        $upd_query   .= ' ON DELETE ' . $options_array[${$master_field . '_on_delete'}];
                    }
                    if (${$master_field . '_on_update'} != 'nix') {
                        $upd_query   .= ' ON UPDATE ' . $options_array[${$master_field . '_on_update'}];
                    }

                } // end if... else....
            } else if (isset($existrel_innodb[$master_field])) {
                    if (PMA_MYSQL_INT_VERSION >= 40013) {
                        $upd_query  = 'ALTER TABLE ' . $table 
                                . ' DROP FOREIGN KEY '
                                . $existrel_innodb[$master_field]['constraint'];
                    }
            } // end if... else....

            if (isset($upd_query)) {
                $upd_rs         = PMA_mysql_query($upd_query);
                if (PMA_mysql_error() && mysql_errno() == 1005) {
                    echo '<p class="warning">' . $strNoIndex . ' (' . $master_field .')</p>'  . PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
                }
                unset($upd_query);
            }
        } // end while
    } // end if isset($destination_innodb)

} // end if


// U p d a t e s   f o r   d i s p l a y   f i e l d 

if ($cfgRelation['displaywork']
    && isset($submit_show) && $submit_show == 'true') {

    if ($disp) {
        if ($display_field != '') {
            $upd_query = 'UPDATE ' . PMA_backquote($cfgRelation['table_info'])
                       . ' SET display_field = \'' . PMA_sqlAddslashes($display_field) . '\''
                       . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
                       . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
        } else {
            $upd_query = 'DELETE FROM ' . PMA_backquote($cfgRelation['table_info'])
                       . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
                       . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
        }
    } elseif ($display_field != '') {
        $upd_query = 'INSERT INTO ' . PMA_backquote($cfgRelation['table_info'])
                   . '(db_name, table_name, display_field) '
                   . ' VALUES('
                   . '\'' . PMA_sqlAddslashes($db) . '\','
                   . '\'' . PMA_sqlAddslashes($table) . '\','
                   . '\'' . PMA_sqlAddslashes($display_field) . '\')';
    }
    
    if (isset($upd_query)) {
        $upd_rs    = PMA_query_as_cu($upd_query);
    }
} // end if

if ($cfgRelation['commwork']
    && isset($submit_comm) && $submit_comm == 'true') {
    while (list($key, $value) = each($comment)) {
        // garvin: I exported the snippet here to a function (relation.lib.php) , so it can be used multiple times throughout other pages where you can set comments.
        PMA_setComment($db, $table, $key, $value);
    }  // end while (transferred data)
} // end if (commwork)

// If we did an update, refresh our data
if ($cfgRelation['relwork']
    && isset($submit_rel) && $submit_rel == 'true') {
    $existrel = PMA_getForeigners($db, $table, '', 'internal');
    if ($tbl_type=='INNODB') {
        $existrel_innodb = PMA_getForeigners($db, $table, '', 'innodb');
    }
}
if ($cfgRelation['displaywork']) {
    $disp     = PMA_getDisplayField($db, $table);
}
if ($cfgRelation['commwork']) {
    $comments = PMA_getComments($db, $table);
}


/**
 * Dialog
 */
if ($cfgRelation['relwork']) {

    // To choose relations we first need all tables names in current db
    // and if PMA version permits and the main table is innodb,
    // we use SHOW TABLE STATUS because we need to find other InnoDB tables

    if (PMA_MYSQL_INT_VERSION >= 32303 && $tbl_type=='INNODB') {
        $tab_query           = 'SHOW TABLE STATUS FROM ' . PMA_backquote($db);
    // [0] of the row is the name
    // [1] is the type
    } else {
        $tab_query           = 'SHOW TABLES FROM ' . PMA_backquote($db);
    }
    // [0] of the row is the name

    $tab_rs              = PMA_mysql_query($tab_query) or PMA_mysqlDie('', $tab_query, '', $err_url_0);
    $selectboxall['nix'] = '--';
    $selectboxall_innodb['nix'] = '--';

    while ($curr_table = @PMA_mysql_fetch_array($tab_rs)) {
        if (($curr_table[0] != $table) && ($curr_table[0] != $cfg['Server']['relation'])) {
            $fi_query = 'SHOW KEYS FROM ' . PMA_backquote($curr_table[0]);
            $fi_rs    = PMA_mysql_query($fi_query) or PMA_mysqlDie('', $fi_query, '', $err_url_0);
            if ($fi_rs && mysql_num_rows($fi_rs) > 0) {
                $seen_a_primary=FALSE;
                while ($curr_field = PMA_mysql_fetch_array($fi_rs)) {
                    if (isset($curr_field['Key_name']) && $curr_field['Key_name'] == 'PRIMARY') {
                        $seen_a_primary=TRUE;
                        $field_full = $db . '.' .$curr_field['Table'] . '.' . $curr_field['Column_name'];
                        $field_v    = $curr_field['Table'] . '->' . $curr_field['Column_name'];
                        $selectboxall[$field_full] =  $field_v;
                        // there could be more than one segment of the primary
                        // so do not break

                        // Please watch here, tbl_type is INNODB but the
                        // resulting value of SHOW KEYS is InnoDB
                      
                        if ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
                        $selectboxall_innodb[$field_full] =  $field_v;
                        }

                    } else if (isset($curr_field['Non_unique']) && $curr_field['Non_unique'] == 0 && $seen_a_primary==FALSE) {
                        // if we can't find a primary key we take any unique one
                        // (in fact, we show all segments of unique keys
                        //  and all unique keys)
                        $field_full = $db . '.' . $curr_field['Table'] . '.' . $curr_field['Column_name'];
                        $field_v    = $curr_field['Table'] . '->' . $curr_field['Column_name'];
                        $selectboxall[$field_full] =  $field_v;
                        if ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
                        $selectboxall_innodb[$field_full] =  $field_v;
                        }

                    // for InnoDB, any index is allowed
                    } else if ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
                        $field_full = $db . '.' . $curr_field['Table'] . '.' . $curr_field['Column_name'];
                        $field_v    = $curr_field['Table'] . '->' . $curr_field['Column_name'];
                        $selectboxall_innodb[$field_full] =  $field_v;

                    } // end if
                } // end while over keys
            } // end if (mysql_num_rows)

        // Mike Beck - 24.07.02: i've been asked to add all keys of the
        // current table (see bug report #574851)
        }
        else if ($curr_table[0] == $table) {
            $fi_query = 'SHOW KEYS FROM ' . PMA_backquote($curr_table[0]);
            $fi_rs    = PMA_mysql_query($fi_query) or PMA_mysqlDie('', $fi_query, '', $err_url_0);
            if ($fi_rs && mysql_num_rows($fi_rs) > 0) {
                while ($curr_field = PMA_mysql_fetch_array($fi_rs)) {
                    $field_full = $db . '.' . $curr_field['Table'] . '.' . $curr_field['Column_name'];
                    $field_v    = $curr_field['Table'] . '->' . $curr_field['Column_name'];
                    $selectboxall[$field_full] =  $field_v;
                    if ($tbl_type=='INNODB' && isset($curr_table[1]) && $curr_table[1]=='InnoDB') {
                    $selectboxall_innodb[$field_full] =  $field_v;
                    }
                } // end while
            } // end if (mysql_num_rows)
        }
    } // end while over tables

} // end if


// Now find out the columns of our $table
$col_query = 'SHOW COLUMNS FROM ' . PMA_backquote($table);
$col_rs    = PMA_mysql_query($col_query) or PMA_mysqlDie('', $col_query, '', $err_url_0);

if ($col_rs && mysql_num_rows($col_rs) > 0) {
    while ($row = PMA_mysql_fetch_array($col_rs)) {
        $save_row[] = $row;
    }
    $saved_row_cnt  = count($save_row);

    ?>
<form method="post" action="tbl_relation.php">
    <?php echo PMA_generate_common_hidden_inputs($db, $table); ?>
    <input type="hidden" name="submit_rel" value="true" />

    <table>
    <tr>
        <th colspan="4" align="center"><b><?php echo $strLinksTo; ?></b></th>
    </tr>
    <tr>
        <th></th><th><b><?php echo $strInternalRelations;
        if ($tbl_type=='INNODB') {
            echo '&nbsp;(*)';
        }
        ?></b></th>
        <?php
        if ($tbl_type=='INNODB') {
            echo '<th colspan="2">InnoDB';
            if (PMA_MYSQL_INT_VERSION < 40013) {
                echo '&nbsp;(**)';
            }
            echo '</th>';
        }
        ?>
    </tr>
    <?php
    for ($i = 0; $i < $saved_row_cnt; $i++) {
        $myfield = $save_row[$i]['Field'];
        echo "\n";
        ?>
    <tr>
        <th><?php echo $save_row[$i]['Field']; ?></th>
        <td>
            <select name="destination[<?php echo htmlspecialchars($save_row[$i]['Field']); ?>]">
        <?php
        echo "\n";

        // PMA internal relations
        reset($selectboxall);
        if (isset($existrel[$myfield])) {
            $foreign_field    = $existrel[$myfield]['foreign_db'] . '.'
                     . $existrel[$myfield]['foreign_table'] . '.'
                     . $existrel[$myfield]['foreign_field'];
        } else {
            $foreign_field    = FALSE;
        }
        $seen_key = FALSE;
        while (list($key, $value) = each($selectboxall)) {
            echo '                '
                 . '<option value="' . htmlspecialchars($key) . '"';
            if ($foreign_field && $key == $foreign_field) {
                echo ' selected="selected"';
                $seen_key = TRUE;
            }
            echo '>' . $value . '</option>'. "\n";
        } // end while

        // if the link defined in relationtable points to a foreign field
        // that is not a key in the foreign table, we show the link 
        // (will not be shown with an arrow)
        if ($foreign_field && !$seen_key) {
            echo '                '
                 . '<option value="' . htmlspecialchars($foreign_field) . '"';
            echo ' selected="selected"';
            echo '>' . $foreign_field . '</option>'. "\n";
        }
        ?>
            </select>
        </td>
        <?php
        if ($tbl_type=='INNODB') {
        ?>
        <td>
            <select name="destination_innodb[<?php echo htmlspecialchars($save_row[$i]['Field']); ?>]">
        <?php
            reset($selectboxall_innodb);
            if (isset($existrel_innodb[$myfield])) {
                $foreign_field    = $existrel_innodb[$myfield]['foreign_db'] . '.'
                         . $existrel_innodb[$myfield]['foreign_table'] . '.'
                         . $existrel_innodb[$myfield]['foreign_field'];
            } else {
                $foreign_field    = FALSE;
            }
            while (list($key, $value) = each($selectboxall_innodb)) {
                echo '                '
                     . '<option value="' . htmlspecialchars($key) . '"';
                if ($foreign_field && $key == $foreign_field) {
                    echo ' selected="selected"';
                }
                echo '>' . $value . '</option>'. "\n";
            } // end while

        ?>
                </select>
        </td>
        <td>
        <?php 
              PMA_generate_dropdown('ON DELETE',
                  htmlspecialchars($save_row[$i]['Field']) . '_on_delete',
                  $options_array,
                  (isset($existrel_innodb[$myfield]['on_delete']) ? $existrel_innodb[$myfield]['on_delete']: '') ); 

              echo '&nbsp;&nbsp;&nbsp;';

              PMA_generate_dropdown('ON UPDATE',
                  htmlspecialchars($save_row[$i]['Field']) . '_on_update',
                  $options_array,
                  (isset($existrel_innodb[$myfield]['on_update']) ? $existrel_innodb[$myfield]['on_update']: '') ); 

        }
        ?>
        </td>
    </tr>
        <?php
    } // end for

    echo "\n";
    ?>
    <tr>
        <td colspan="2" align="center">
            <input type="submit" value="<?php echo '  ' . $strGo . '  '; ?>" />
        </td>
    </tr>
    </table>
    <?php
        if ($tbl_type=='INNODB') {
            echo $strInternalNotNecessary . '<br />';
                if (PMA_MYSQL_INT_VERSION < 40013) {
                    echo '** ' . sprintf($strUpgradeMySQL, '4.0.13') . '<br />';
                }
        }
    ?>
</form>

    <?php
    if ($cfgRelation['displaywork']) {
        // Get "display_field" infos
        $disp = PMA_getDisplayField($db, $table);

        echo "\n";
        ?>
<form method="post" action="tbl_relation.php">
    <?php echo PMA_generate_common_hidden_inputs($db, $table); ?>
    <input type="hidden" name="submit_show" value="true" />

    <p><?php echo $strChangeDisplay . ': '; ?>
    <select name="display_field" onchange="this.form.submit();">
        <option value="">---</option>
        <?php
        echo "\n";
        mysql_data_seek($col_rs, 0);
        while ($row = @PMA_mysql_fetch_array($col_rs)) {
            echo '        <option value="' . htmlspecialchars($row['Field']) . '"';
            if (isset($disp) && $row['Field'] == $disp) {
                echo ' selected="selected"';
            }
            echo '>' . htmlspecialchars($row['Field']) . '</option>'. "\n";
        } // end while
        ?>
    </select>
    <script type="text/javascript" language="javascript">
    <!--
    // Fake js to allow the use of the <noscript> tag
    //-->
    </script>
    <noscript>
        <input type="submit" value="<?php echo $strGo; ?>" />
    </noscript>
</form>
</p>
        <?php
    } // end if (displayworks)

    if ($cfgRelation['commwork']) {

        echo "\n";
        ?>
<form method="post" action="tbl_relation.php">
    <?php echo PMA_generate_common_hidden_inputs($db, $table); ?>
    <input type="hidden" name="submit_comm" value="true" />

    <table>
    <tr>
        <th colspan="2" align="center"><b><?php echo $strComments; ?></b></th>
    </tr>
        <?php
        for ($i = 0; $i < $saved_row_cnt; $i++) {
            $field = $save_row[$i]['Field'];
            echo "\n";
            ?>
    <tr>
        <th><?php echo $field; ?></th>
        <td>
            <input type="text" name="comment[<?php echo $field; ?>]" value="<?php echo (isset($comments[$field]) ?  htmlspecialchars($comments[$field]) : ''); ?>" />
        </td>
    </tr>
            <?php
        } // end for

        echo "\n";
        ?>
    <tr>
        <td colspan="2" align="center">
            <input type="submit" value="<?php echo $strGo; ?>" />
        </td>
    </tr>
    </table>
</form>
        <?php
    } //    end if (comments work)
} // end if (we have columns in this table)


/**
 * Displays the footer
 */
echo "\n";
require('./footer.inc.php');
?>
