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<?php
    /*
     * This class will parse and execute Postgresql .sql files
     * Original importer code written by the phpPgAdmin Project.
     *
     * Modified by Arend van Waart, 2008
     * Copyright (c) 2002, 2003, 2004, 2005 The phpPgAdmin Project

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.
        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License <http://www.opensource.org/gpl-license.html>
        for more details.
     *
     */

ini_set('display_errors','On');
error_reporting (E_ALL | E_STRICT);
    
class ImportSQL {
    private $connection;
    private $lang;
    function __construct ($dsn) {
        $this->initlang();
        $this->connect($dsn);
    }
    function connect ($dsn) {
        if (is_resource($this->connection)) {
            pg_close($this->connection);
            $this->connection = null;
        }
        
        $this->connection = pg_connect($dsn) or die('Could not connect');
    }
    
    private function initLang() {
        $lang['strrows'] = 'row(s)';
        $lang['strellipsis'] = '...';
        $lang['strellipsis'] = '...';
        $lang['stryes'] = 'Yes';
        $lang['strno'] = 'No';
        $lang['strtrue'] = 'TRUE';
        $lang['strfalse'] = 'FALSE';
        $lang['strbytes'] = 'bytes';
        $lang['strkb'] = 'kB';
        $lang['strmb'] = 'MB';
        $lang['strgb'] = 'GB';
        $lang['strtb'] = 'TB';
        $lang['strhealthy'] = 'Healthy';
        $lang['stroutofsync'] = 'Out of sync';
        $lang['strunknown'] = 'Unknown';
        $this->lang = $lang;
    }
    
    /**
     * A private helper method for executeScript that advances the
     * character by 1.  In psql this is careful to take into account
     * multibyte languages, but we don't at the moment, so this function
     * is someone redundant, since it will always advance by 1
     * @param &$i The current character position in the line
     * @param &$prevlen Length of previous character (ie. 1)
     * @param &$thislen Length of current character (ie. 1)
     */
    function advance_1(&$i, &$prevlen, &$thislen) {
        $prevlen = $thislen;
        $i += $thislen;
        $thislen = 1;
    }

    /**
     * Executes an SQL script as a series of SQL statements.  Returns
     * the result of the final step.  This is a very complicated lexer
     * based on the REL7_4_STABLE src/bin/psql/mainloop.c lexer in
     * the PostgreSQL source code.
     * XXX: It does not handle multibyte languages properly.
     * @param $name Entry in $_FILES to use
     * @param $callback (optional) Callback function to call with each query,
                                   its result and line number.
     * @return True for general success, false on any failure.
     */
    function executeScript($file, $bIsString = false, $callback = "sqlCallback") {
        $conn = $this->connection;
        if (!is_resource($conn)) {
            throw new Exception("No valid postgres connector!");
        }
        // CREATE A PSEUDO STREAM FOR READING FROM VARIABLES
        if ($bIsString == true) {
            $fd = fopen("php://temp/maxmemory:" . 5 * 1024 * 1024, 'r+');

            fputs($fd, $file);
            
            // read what we have written
            rewind($fd);
        } else {
        // This whole function isn't very encapsulated, but hey...
            $fd = fopen($file,"r") or die("Could not open $file");
        }
        // Build up each SQL statement, they can be multiline
        $query_buf = null;
        $query_start = 0;
        $in_quote = 0;
        $in_xcomment = 0;
        $bslash_count = 0;
        $dol_quote = null;
        $paren_level = 0;
        $len = 0;
        $i = 0;
        $prevlen = 0;
        $thislen = 0;
        $lineno = 0;

        // Loop over each line in the file
        while (!feof($fd)) {
            $line = fgets($fd, 32768);
            $lineno++;
            // Nothing left on line? Then ignore...
            if (trim($line) == '') continue;

            $len = strlen($line);
            $query_start = 0;

            /*
             * Parse line, looking for command separators.
             *
             * The current character is at line[i], the prior character at line[i
             * - prevlen], the next character at line[i + thislen].
             */
            $prevlen = 0;
            $thislen = ($len > 0) ? 1 : 0;

            for ($i = 0; $i < $len; $this->advance_1($i, $prevlen, $thislen)) {

                /* was the previous character a backslash? */
                if ($i > 0 && substr($line, $i - $prevlen, 1) == '\\')
                    $bslash_count++;
                else
                    $bslash_count = 0;

                /*
                 * It is important to place the in_* test routines before the
                 * in_* detection routines. i.e. we have to test if we are in
                 * a quote before testing for comments.
                 */

                /* in quote? */
                if ($in_quote != 0)
                {
                    /*
                     * end of quote if matching non-backslashed character.
                     * backslashes don't count for double quotes, though.
                     */
                    if (substr($line, $i, 1) == $in_quote &&
                        ($bslash_count % 2 == 0 || $in_quote == '"'))
                        $in_quote = 0;
                }

                /* in or end of $foo$ type quote? */
                else if ($dol_quote) {
                    if (strncmp(substr($line, $i), $dol_quote, strlen($dol_quote)) == 0) {
                        $this->advance_1($i, $prevlen, $thislen);
                        while(substr($line, $i, 1) != '$')
                            $this->advance_1($i, $prevlen, $thislen);
                        $dol_quote = null;
                    }
                }

                /* start of extended comment? */
                else if (substr($line, $i, 2) == '/*')
                {
                    $in_xcomment++;
                    if ($in_xcomment == 1)
                        $this->advance_1($i, $prevlen, $thislen);
                }

                /* in or end of extended comment? */
                else if ($in_xcomment)
                {
                    if (substr($line, $i, 2) == '*/' && !--$in_xcomment)
                        $this->advance_1($i, $prevlen, $thislen);
                }

                /* start of quote? */
                else if (substr($line, $i, 1) == '\'' || substr($line, $i, 1) == '"') {
                    $in_quote = substr($line, $i, 1);
                }

                /*
                 * start of $foo$ type quote?
                 */
                else if (!$dol_quote && $this->valid_dolquote(substr($line, $i))) {
                    $dol_end = strpos(substr($line, $i + 1), '$');
                    $dol_quote = substr($line, $i, $dol_end + 1);
                    $this->advance_1($i, $prevlen, $thislen);
                    while (substr($line, $i, 1) != '$') {
                        $this->advance_1($i, $prevlen, $thislen);
                    }

                }

                /* single-line comment? truncate line */
                else if (substr($line, $i, 2) == '--')
                {
                    $line = substr($line, 0, $i); /* remove comment */
                    break;
                }

                /* count nested parentheses */
                else if (substr($line, $i, 1) == '(') {
                    $paren_level++;
                }

                else if (substr($line, $i, 1) == ')' && $paren_level > 0) {
                    $paren_level--;
                }

                /* semicolon? then send query */
                else if (substr($line, $i, 1) == ';' && !$bslash_count && !$paren_level)
                {
                    $subline = substr(substr($line, 0, $i), $query_start);
                    /* is there anything else on the line? */
                    if (strspn($subline, " \t\n\r") != strlen($subline))
                    {
                        /*
                         * insert a cosmetic newline, if this is not the first
                         * line in the buffer
                         */
                        if (strlen($query_buf) > 0)
                            $query_buf .= "\n";
                        /* append the line to the query buffer */
                        $query_buf .= $subline;
                        $query_buf .= ';';

                        // Execute the query (supporting 4.1.x PHP...). PHP cannot execute
                        // empty queries, unlike libpq
                        //if (function_exists('pg_query'))
                            $res = @pg_query($conn, $query_buf);
                        //else
                            //$res = pg_exec($conn, $query_buf);
                        // Call the callback function for display
                        if ($callback !== null) $this->$callback($query_buf, $res, $lineno);
                        // Check for COPY request
                        if (pg_result_status($res) == 4) { // 4 == PGSQL_COPY_FROM
                            while (!feof($fd)) {
                                $copy = fgets($fd, 32768);
                                $lineno++;
                                pg_put_line($conn, $copy);
                                if ($copy == "\\.\n" || $copy == "\\.\r\n") {
                                    @pg_end_copy($conn);
                                    if ($callback !== null) $this->$callback($query_buf, $res, $lineno);
                                    break;
                                }
                            }
                        }
                    }

                    $query_buf = null;
                    $query_start = $i + $thislen;
                }

                /*
                 * keyword or identifier?
                 * We grab the whole string so that we don't
                 * mistakenly see $foo$ inside an identifier as the start
                 * of a dollar quote.
                 */
                // XXX: multibyte here
                else if (ereg('^[_[:alpha:]]$', substr($line, $i, 1))) {
                    $sub = substr($line, $i, $thislen);
                    while (ereg('^[\$_A-Za-z0-9]$', $sub)) {
                        /* keep going while we still have identifier chars */
                        $this->advance_1($i, $prevlen, $thislen);
                        $sub = substr($line, $i, $thislen);
                    }
                    // Since we're now over the next character to be examined, it is necessary
                    // to move back one space.
                    $i-=$prevlen;
                }
            } // end for

            /* Put the rest of the line in the query buffer. */
            $subline = substr($line, $query_start);
            if ($in_quote || $dol_quote || strspn($subline, " \t\n\r") != strlen($subline))
            {
                if (strlen($query_buf) > 0)
                    $query_buf .= "\n";
                $query_buf .= $subline;
            }

            $line = null;

        } // end while

        /*
         * Process query at the end of file without a semicolon, so long as
         * it's non-empty.
         */
        if (strlen($query_buf) > 0 && strspn($query_buf, " \t\n\r") != strlen($query_buf))
        {
            // Execute the query (supporting 4.1.x PHP...)
            if (function_exists('pg_query')) {
                $res = @pg_query($conn, $query_buf);
            } else {
                $res = @pg_exec($conn, $query_buf);
            }
            // Call the callback function for display
            if ($callback !== null) $this->$callback($query_buf, $res, $lineno);
            // Check for COPY request
            if (pg_result_status($res) == 4) { // 4 == PGSQL_COPY_FROM
                while (!feof($fd)) {
                    $copy = fgets($fd, 32768);
                    $lineno++;
                    pg_put_line($conn, $copy);
                    if ($copy == "\\.\n" || $copy == "\\.\r\n") {
                        @pg_end_copy($conn);
                        if ($callback !== null) $this->$callback($query_buf, $res, $lineno);
                        break;
                    }
                }
            }
        }

        fclose($fd);
        return true;
    }
    
    function sqlCallback($query, $rs, $lineno) {
        $lang = $this->lang;
        $_connection = $this->connection;
        // Check if $rs is false, if so then there was a fatal error
        if ($rs === false) {
            echo '<span style="color:red">Line:' . $lineno, ': ', nl2br(htmlspecialchars(pg_last_error($_connection))), "</span><br />\n";
        }
        else {
            // Print query results
            switch (pg_result_status($rs)) {
                case PGSQL_TUPLES_OK:
                    // If rows returned, then display the results
                    $num_fields = pg_numfields($rs);
                    echo "<p><table>\n<tr>";
                    for ($k = 0; $k < $num_fields; $k++) {
                        echo "<th class=\"data\">", $this->printVal(pg_fieldname($rs, $k)), "</th>";
                    }
        
                    $i = 0;
                    $row = pg_fetch_row($rs);
                    while ($row !== false) {
                        $id = (($i % 2) == 0 ? '1' : '2');
                        echo "<tr>\n";
                        foreach ($row as $k => $v) {
                            echo "<td class=\"data{$id}\" style=\"white-space:nowrap;\">", $this->printVal($v, pg_fieldtype($rs, $k), array('null' => true)), "</td>";
                        }                            
                        echo "</tr>\n";
                        $row = pg_fetch_row($rs);
                        $i++;
                    };
                    echo "</table><br/>\n";
                    echo $i, " {$lang['strrows']}</p>\n";
                    break;
                case PGSQL_COMMAND_OK:
                    // If we have the command completion tag
                    if (version_compare(phpversion(), '4.3', '>=')) {
                        echo htmlspecialchars(pg_result_status($rs, PGSQL_STATUS_STRING)), "<br/>\n";
                    }
                    // Otherwise if any rows have been affected
                    // Otherwise output nothing...
                    break;
                case PGSQL_EMPTY_QUERY:
                    break;
                default:
                    break;
            }
        }
    }
    
        /**
         * Render a value into HTML using formatting rules specified
         * by a type name and parameters.
         *
         * @param $str The string to change
         *
         * @param $type Field type (optional), this may be an internal PostgreSQL type, or:
         *            yesno    - same as bool, but renders as 'Yes' or 'No'.
         *            pre      - render in a <pre> block.
         *            nbsp     - replace all spaces with &nbsp;'s
         *            verbatim - render exactly as supplied, no escaping what-so-ever.
         *            callback - render using a callback function supplied in the 'function' param.
         *
         * @param $params Type parameters (optional), known parameters:
         *            null     - string to display if $str is null, or set to TRUE to use a default 'NULL' string,
         *                       otherwise nothing is rendered.
         *            clip     - if true, clip the value to a fixed length, and append an ellipsis...
         *            cliplen  - the maximum length when clip is enabled (defaults to $conf['max_chars'])
         *            ellipsis - the string to append to a clipped value (defaults to $lang['strellipsis'])
         *            tag      - an HTML element name to surround the value.
         *            class    - a class attribute to apply to any surrounding HTML element.
         *            align    - an align attribute ('left','right','center' etc.)
         *            true     - (type='bool') the representation of true.
         *            false    - (type='bool') the representation of false.
         *            function - (type='callback') a function name, accepts args ($str, $params) and returns a rendering.
         *            lineno   - prefix each line with a line number.
         *            map      - an associative array.
         *
         * @return The HTML rendered value
         */
        function printVal($str, $type = null, $params = array()) {
            $lang = $this->lang;

            // Shortcircuit for a NULL value
            if (is_null($str))
                return isset($params['null'])
                        ? ($params['null'] === true ? '<i>NULL</i>' : $params['null'])
                        : '';

            // no clipping!
            /*
            if (isset($params['map']) && isset($params['map'][$str])) $str = $params['map'][$str];

            // Clip the value if the 'clip' parameter is true.
            if (isset($params['clip']) && $params['clip'] === true) {
                $maxlen = isset($params['cliplen']) && is_integer($params['cliplen']) ? $params['cliplen'] : $conf['max_chars'];
                $ellipsis = isset($params['ellipsis']) ? $params['ellipsis'] : $lang['strellipsis'];
                if (strlen($str) > $maxlen) {
                    $str = substr($str, 0, $maxlen-1) . $ellipsis;
                }
            }
            */
            $out = '';

            switch ($type) {
                case 'int2':
                case 'int4':
                case 'int8':
                case 'float4':
                case 'float8':
                case 'money':
                case 'numeric':
                case 'oid':
                case 'xid':
                case 'cid':
                case 'tid':
                    $align = 'right';
                    $out = nl2br(htmlspecialchars($str));
                    break;
                case 'yesno':
                    if (!isset($params['true'])) $params['true'] = $lang['stryes'];
                    if (!isset($params['false'])) $params['false'] = $lang['strno'];
                    // No break - fall through to boolean case.
                case 'bool':
                case 'boolean':
                    if (is_bool($str)) $str = $str ? 't' : 'f';
                    switch ($str) {
                        case 't':
                            $out = (isset($params['true']) ? $params['true'] : $lang['strtrue']);
                            $align = 'center';
                            break;
                        case 'f':
                            $out = (isset($params['false']) ? $params['false'] : $lang['strfalse']);
                            $align = 'center';
                            break;
                        default:
                            $out = htmlspecialchars($str);
                    }
                    break;
                case 'bytea':
                    $out = stripslashes(pg_escape_bytea($str));
                    break;
                case 'pre':
                    $tag = 'pre';
                    $out = htmlspecialchars($str);
                    break;
                case 'prenoescape':
                    $tag = 'pre';
                    $out = $str;
                    break;
                case 'nbsp':
                    $out = nl2br(str_replace(' ', '&nbsp;', htmlspecialchars($str)));
                    break;
                case 'verbatim':
                    $out = $str;
                    break;
                case 'callback':
                    $out = $params['function']($str, $params);
                    break;
                case 'prettysize':
                    $mult = 1;
                    $limit = 10 * 1024;

                    if ($str < $limit * $mult)
                        $out = $str.' '.$lang['strbytes'];
                    else
                    {
                        $mult *= 1024;
                        if ($str < $limit * $mult)
                            $out = floor(($str + $mult / 2) / $mult).' '.$lang['strkb'];
                        else
                        {
                            $mult *= 1024;
                            if ($str < $limit * $mult)
                                $out = floor(($str + $mult / 2) / $mult).' '.$lang['strmb'];
                            else
                            {
                                $mult *= 1024;
                                if ($str < $limit * $mult)
                                    $out = floor(($str + $mult / 2) / $mult).' '.$lang['strgb'];
                                else
                                {
                                    $mult *= 1024;
                                    if ($str < $limit * $mult)
                                        $out = floor(($str + $mult / 2) / $mult).' '.$lang['strtb'];
                                }
                            }
                        }
                    }
                    break;
                case 'slonystatus':
                    switch ($str) {
                    case 'insync':
                        $out = $lang['strhealthy'];
                        break;
                    case 'outofsync':
                        $out = $lang['stroutofsync'];
                        break;
                    default:
                        $out = $lang['strunknown'];
                    }
                    break;
                default:
                    // If the string contains at least one instance of >1 space in a row, a tab
                    // character, a space at the start of a line, or a space at the start of
                    // the whole string then render within a pre-formatted element (<pre>).
                    if (preg_match('/(^ |  |\t|\n )/m', $str)) {
                        $tag = 'pre';
                        $class = 'data';
                        $out = htmlspecialchars($str);
                    } else {
                        $out = nl2br(htmlspecialchars($str));
                    }
            }

            if (isset($params['class'])) $class = $params['class'];
            if (isset($params['align'])) $align = $params['align'];

            if (!isset($tag) && (isset($class) || isset($align))) $tag = 'div';

            if (isset($tag)) {
                $alignattr = isset($align) ? " style=\"text-align: {$align}\"" : '';
                $classattr = isset($class) ? " class=\"{$class}\"" : '';
                $out = "<{$tag}{$alignattr}{$classattr}>{$out}</{$tag}>";
            }

            // Add line numbers if 'lineno' param is true
            if (isset($params['lineno']) && $params['lineno'] === true) {
                $lines = explode("\n", $str);
                $num = count($lines);
                if ($num > 0) {
                    $temp = "<table>\n<tr><td class=\"{$class}\" style=\"vertical-align: top; padding-right: 10px;\"><pre class=\"{$class}\">";
                    for ($i = 1; $i <= $num; $i++) {
                        $temp .= $i . "\n";
                    }
                    $temp .= "</pre></td><td class=\"{$class}\" style=\"vertical-align: top;\">{$out}</td></tr></table>\n";
                    $out = $temp;
                }
                unset($lines);
            }

            return $out;
        }
    function valid_dolquote($dquote) {
        // XXX: support multibyte
        return (ereg('^[$][$]', $dquote) || ereg('^[$][_[:alpha:]][_[:alnum:]]*[$]', $dquote));
    }
}
?>

 
 

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