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<?php
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/* $Id$ */
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/**
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* dbfm_mkdir -called from the ajax action - switch case 'mkdir':
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* zzzzzzzzzzzz you need to update your header!!!
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* @param string $source - it's the parent directory path
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* @param string $dest - it's the proposed new directory name
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* @param bool $rename - This flag allows a directory rename for cases where the directory already exists
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* if you were trying to create a directory myfiles then it would try to rename it
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* myfiles_01, myfiles_02 etc. until it found a name that hadn't been used
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* @param string $error - the address of an array used to store any error messages
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*
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* @ret bool -true if the directory is created successfully (with 775 permissions for FS)
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*/
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function dbfm_mkdir($source, $dest, $rename = FALSE, &$error) {
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//source is the parent directory, dest is the proposed name for our directory
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$mkdir_path = ($source.'/'.$dest);
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global $user;
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// we've got to work out which directory node we're adding to by searching on the fpath field
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$currentdate = date("Y-m-d H:i:s");
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$setmime = "directory";
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//we need to check first whether there's already a directory of this name, if there is then we
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// simply append a number and try again ... and again, eventually we'll find an unused name
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$count = 0;
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$numret = 1;
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$dirpath = $mkdir_path;
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while ($numret) {
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$parent = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'", $dirpath);
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$parentrec = db_fetch_object($parent);
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$numret = db_num_rows($parent);
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if ($numret) {
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$count++;
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$dirpath = $mkdir_path . "_" . $count;
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}
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}
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if ($count > 0) {
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$dest = $dest . "_" . $count;
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}
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// find the database entry representing the parent
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$parent = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'", $source);
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$parentrec = db_fetch_object($parent);
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$numret = db_num_rows($parent);
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if ($numret != 1) {
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//should only be one parent
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$error[] = "ERROR: Unable to find parent directory " . $source;
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return FALSE;
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}
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//increment fsize - shows the number of entries in the directory
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$numdir = $parentrec->fsize + 1;
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// we'll write to the database
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$result = db_query("INSERT INTO {dbfm_file} (uid, fpath, fname, fsize, fmime, fcreatedate, flastmod, fparent) VALUES (%d, '%s', '%s', %d, '%s', '%s', '%s', %d)",$user->uid, $dirpath, $dest, 0, $setmime, $currentdate, $currentdate, $parentrec->fid);
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if ($result === FALSE) {
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$error[] = "ERROR: Failed to insert the directory " . $dest . " into the database";
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return FALSE;
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}
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// and update the parent record - fsize stores the number of directories parented
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$result = db_query("UPDATE {dbfm_file} SET `fsize` = %d WHERE fid = %d ", $numdir, $parentrec->fid);
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if ($result === FALSE) {
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$error[] = "ERROR: Failed to update the parent directory for " . $dest;
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return FALSE;
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}
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//return the directory path of the newly created directory in the error array
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//SUCCESS!!
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$error = $dirpath;
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return TRUE;
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}
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/**
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* dbfm_rename -called from the ajax action - switch case 'rename' is this ONLY for directories??
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*
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* @param string $source - the source directory path
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* @param string $dest - the destination directory name
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* @param string &$err_arr - ref to error array for client feedback
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*
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* @ret bool -true if the directory/file is renamed and file record(s)
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* updated if dir/file under db control
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*/
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function dbfm_rename($source, $dest, &$err_arr) {
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//check what the $source is - a file or directory ZZZZ will need extra code here to deal with versions
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$qsource = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'",$source);
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$source_rec = db_fetch_object ($qsource);
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//the source MUST already exist otherwise the user wouldn't have been able to select it
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//does the destination already exist?
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$qdest = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'",$dest);
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$numret = db_num_rows($qdest);
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if ($numret > 0) {
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$err_arr = "Rename failed - destination " . $dest . " already exists";
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return FALSE;
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}
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// a line to split the filename away from the file path
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// reverse the path and look for the first slash. Get a substring of the reversed path from the beginning up to,
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//but not including, the slash. Now reverse it to give you the filename
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// hmnnn - someone not heard of strrchr? perhaps
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// $filename = substr(strrchr($dest, '/'), 1); //substr allows you to start after the slash
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$filename = strrev(substr(strrev($dest), 0, strpos(strrev($dest), '/')));
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// simplified code - we'd need to check here for a valid name and extension, things like apostrophes etc. need catching
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// i'd sure like to use a dbfm function for this but the current update function
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// only changes path and doesn't deal with fname. For now I'll put some inline code
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// ZZZZ I think I'll update the last modified date too
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$result = db_query("UPDATE {dbfm_file} SET fpath = '%s', fname = '%s' WHERE fid = %d", $dest, $filename, $source_rec->fid);
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if($result === FALSE) {
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$err_arr = "ERROR: Rename failed. Couldn't change name to " . $filename;
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return FALSE;
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}
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if ($source_rec->fmime == 'directory' && $source_rec->fsize > 0) {
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//if it's a directory we need to recurse through the database changing the path for all the children
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//need to update the sourec record first
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$source_rec->fpath = $dest;
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$ret = TRUE;
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return dbfm_recur_dbrename($source_rec, $ret , $err_arr);
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}
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return TRUE;
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}
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/**
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* dbfm_recur_dbrename -the function to recursively rename (actually repath) database records
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*
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* @param record $source - the source directory record
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* @param bool $ret - the return value from the recursive function
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* @param string &$err_arr - ref to error array for client feedback
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*
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* @ret bool -true if the directory/file is updated in the database
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*
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*/
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//new function to recursively change the database fpath entries where a directory has been renamed or moved
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//only used where storage is to the database
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// the first parameter is a file record for the source directory (which has already had it's fpath changed to the correct one)
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// the second parameter allows the return condition to be passed on, the third is the address of an array where error messages
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// can be stored
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function dbfm_recur_dbrename($source, $ret, &$err_arr) {
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//look in the database for children of the directory
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//for each child, re-path it. If it's a directory recurse and re-path all its children
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$qkidlist = db_query("SELECT * FROM {dbfm_file} WHERE fparent = %d", $source->fid);
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while ($sdata = db_fetch_object($qkidlist)) {
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//update the object
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$new_path = $source->fpath . "/" . $sdata->fname;
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$result = db_query("UPDATE {dbfm_file} SET fpath = '%s' WHERE fid = %d", $new_path, $sdata->fid);
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if ($result === FALSE) {
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$err_arr[] = "ERROR: Rename to " . $new_path . " for " . $sdata->fname . " failed";
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$ret = FALSE;
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}
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// if it's a directory, has it got any entries, if so recurse
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if ($sdata->fmime == 'directory' AND $sdata->fsize > 0) {
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// update the source record first
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$sdata->fpath = $new_path;
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$ret = dbfm_recur_dbrename($sdata, $ret, $err_arr);
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}
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} // end of while loop
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return $ret;
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}
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/**
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* dbfm_delete - called from the ajax action - switch case 'delete':
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*
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* @param string $source - the source directory path
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* @param string &$err_arr - ref to error array for client feedback
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*
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* @ret bool -true if the directory or file is deleted and all file records updated
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*/
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function dbfm_delete($source, &$err_arr) {
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// bring back the source record from the database
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$qsource = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'", $source);
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$numret = db_num_rows($qsource);
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if ($numret != 1) {
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//either no records or too many records have been found
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$err_arr[] = "ERROR: Unable to recover the database entry for " . $source;
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return FALSE;
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}
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$rec_to_delete = db_fetch_object($qsource);
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// in fact there's a sneaky way of dealing with the whole thing... we'll just mark the parent record id as -1
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// fill in the last modified date. then have an admin function that REALLY deletes these entries at a later date
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// this means we don't need a recursive directory delete (at least not here, it will be in admin).
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// Directories and their contents become invisible
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$currentdate = date("Y-m-d H:i:s");
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//need to update the parent record
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$qparent = db_query("SELECT * FROM {dbfm_file} WHERE fid = %d", $rec_to_delete->parentid);
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$parentrec = db_fetch_object($qsource);
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$newfilecount = $parentrec->fsize - 1;
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$result = db_query("UPDATE {dbfm_file} SET fsize = %d, flastmod = '%s' WHERE fid = %d", $newfilecount, $currentdate, $parentrec->fid);
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if ($result === FALSE) {
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$err_arr[] = "ERROR: Unable to update filecount for directory " . $parentrec->fname;
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return FALSE;
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}
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$result = db_query("UPDATE {dbfm_file} SET fparent = %d, flastmod = '%s' WHERE fid = %d", '-1', $currentdate, $rec_to_delete->fid);
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if ($result === FALSE) {
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$err_arr[] = "ERROR: Delete Failed for " . $rec_to_delete->fname;
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Move a directory or file and update database
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*
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* @param string $source - the source directory path (what you're moving)
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* @param string $dest - the destination directory name (where you're moving it)
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* @param string &$err_arr - ref to error array for client feedback
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*
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* @ret bool -true if the file and the database entries are updated successfully
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*
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*/
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function dbfm_move($source, $dest, &$err_arr) {
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//read the db record for that path
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$qsource = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'",$source);
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$source_rec = db_fetch_object($qsource);
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//the source MUST already exist otherwise the user wouldn't have been able to select it
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//also open the $source files current parent - we need to strip back to the last slash
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$parentpath = substr($source, 0, strrpos($source, '/'));
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$qoldparent = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'",$parentpath);
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$numret = db_num_rows($qoldparent);
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if ($numret != 1) {
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$err_arr[] = "Move failed - unable to open parent directory " . $parentpath;
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return FALSE;
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}
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$parent_rec = db_fetch_object($qoldparent);
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//does the destination directory already exist - it should do - error if not!
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$qdest = db_query("SELECT * FROM {dbfm_file} WHERE fpath = '%s'",$dest);
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$numret = db_num_rows($qdest);
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if ($numret != 1) {
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// this can't happen! the record must exist for it to have been displayed on screen
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$err_arr[] = "Move failed - destination " . $dest . " does not exist";
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return FALSE;
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}
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// check the destination is a directory and not a file
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$dest_rec = db_fetch_object ($qdest);
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if ($dest_rec->fmime != 'directory') {
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$err_arr[] = "Move failed - destination " . $dest . " must be a directory";
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return FALSE;
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}
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$new_path = $dest . '/' . $source_rec->fname;
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// we first check whether a file / directory of that name already exists in the destination
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// directory. (that's if the directory has any entries)
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if ($dest_rec->fsize > 0) {
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$qdestkids = db_query("SELECT * FROM {dbfm_file} WHERE fparent = %d", $dest_rec->fid);
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//look through the children in the destination directory - if one has the same name then
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while ($dest_kidrec = db_fetch_object ($qdestkids)) {
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if ($dest_kidrec-> fpath == $new_path) {
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$err_arr[] = "ERROR: An object of that name already exists in the destination directory";
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return FALSE;
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}
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}
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}
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//edit the curent record to correct the parent and change the path
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$result = db_query("UPDATE {dbfm_file} SET fpath = '%s', fparent = %d WHERE fid = %d", $new_path, $dest_rec->fid, $source_rec->fid);
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if ($result === FALSE) {
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$err_arr[] = "ERROR: Unable to update the database path for move to " . $new_path;
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return FALSE;
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}
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//edit the destination parent record to add one to the number of entries held in the fsize field
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$result = db_query("UPDATE {dbfm_file} SET fsize = %d WHERE fid = %d", $dest_rec->fsize + 1, $dest_rec->fid);
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if ($result === FALSE) {
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$err_arr[] = "ERROR: Unable to update the destination parent directory " . $dest_rec->fpath;
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return FALSE;
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}
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//edit the previous parent record to deduct one from the number of entries held in the fsize field
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$result = db_query("UPDATE {dbfm_file} SET fsize = %d WHERE fid = %d", $parent_rec->fsize - 1, $parent_rec->fid);
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if ($result === FALSE) {
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$err_arr[] = "ERROR: Unable to update the previous parent directory " . $parentpath;
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return FALSE;
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}
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$ret = TRUE;
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//test whether the source is a directory, if so we need to recursively change all the children of the directory
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if ($source_rec->fmime == 'directory' && $source_rec->fsize > 0) {
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//we need to update the source record first
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$source_rec->fpath = $new_path;
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$ret = dbfm_recur_dbrename($source_rec, $ret, $err_arr);
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}
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return $ret;
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}
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/**
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* dbfm_insert_file - inserts a file into the dbfm_file table
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*
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* @param string $path - path relative to drupal root
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* @param string &$err_arr - ref to error array for client feedback
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*
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* @return bool - TRUE if query executed successfully, otherwise FALSE
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*/
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function dbfm_insert_file($path, &$err_arr){
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$file = new stdClass();
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$file->filepath = $path;
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if(dbfm_enum_validate($file, $err_arr)) {
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if(($ret = dbfm_dbinsert_file($file, $err)) === FALSE) {
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$err_arr[] = $err;
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}
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return $ret;
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}
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return FALSE;
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}
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?>
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