From f9404514ffad818bc071b1e7a393775a8bf6b62c Mon Sep 17 00:00:00 2001
From: nickw <nickw@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Wed, 28 Oct 2009 18:38:17 +0000
Subject: Creating an upgrade script for new user filepath.

git-svn-id: http://code.elgg.org/elgg/trunk@3593 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/upgrades/2009102801.php | 189 +++++++++++++++++++++++++++++++++++++
 1 file changed, 189 insertions(+)
 create mode 100644 engine/lib/upgrades/2009102801.php

(limited to 'engine/lib/upgrades/2009102801.php')

diff --git a/engine/lib/upgrades/2009102801.php b/engine/lib/upgrades/2009102801.php
new file mode 100644
index 000000000..01d7a9ad2
--- /dev/null
+++ b/engine/lib/upgrades/2009102801.php
@@ -0,0 +1,189 @@
+<?php
+
+/**
+	Elgg 1.0
+ */
+function file_matrix_1_0($username)
+{
+	$matrix = "";
+	
+	$len = strlen($username);
+	if ($len > 5)
+		$len = 5;
+	
+	for ($n = 0; $n < $len; $n++) {
+		if (ctype_alnum($username[$n]))
+			$matrix .= $username[$n] . "/";
+	}	
+
+	return $matrix.$username."/";
+}
+
+
+/**
+	Elgg 1.1, 1.2 and 1.5
+ */
+function file_matrix_1_1($filename)
+{
+	$matrix = "";
+	
+	$name = $filename;
+	$filename = mb_str_split($filename);
+	if (!$filename) return false;
+	
+	$len = count($filename);
+	if ($len > 5)
+		$len = 5;
+	
+	for ($n = 0; $n < $len; $n++) {
+		$matrix .= $filename[$n] . "/";
+	}	
+
+	return $matrix.$name."/";
+}
+
+function mb_str_split($string, $charset = 'UTF8')
+{
+	if (is_callable('mb_substr'))
+	{
+		$length = mb_strlen($string);
+		$array = array();
+		
+		while ($length)
+		{
+			$array[] = mb_substr($string, 0, 1, $charset);
+			$string = mb_substr($string, 1, $length, $charset);
+			
+			$length = mb_strlen($string);
+		}
+		
+		return $array;
+	}
+	else
+		return str_split($string);
+	
+	return false;
+}
+
+
+/**
+	Elgg 1.6
+ */
+function file_matrix_1_6($filename)
+{
+	$invalid_fs_chars = '*\'\\/"!$%^&*.%(){}[]#~?<>;|¬`@-+=';
+	
+	$matrix = "";
+	
+	$name = $filename;
+	$filename = mb_str_split($filename);
+	if (!$filename) return false;
+	
+	$len = count($filename);
+	if ($len > 5)
+		$len = 5;
+	
+	for ($n = 0; $n < $len; $n++) {
+		
+		// Prevent a matrix being formed with unsafe characters
+		$char = $filename[$n];
+		if (strpos($invalid_fs_chars, $char)!==false)
+			$char = '_';
+		
+		$matrix .= $char . "/";
+	}	
+
+	return $matrix.$name."/";
+}
+
+
+/**
+ * Scans a directory and moves any files from $from to $to 
+ * preserving structure and handling existing paths.
+ * Will no overwrite files in $to.
+ *
+ * TRAILING SLASHES REQUIRED.
+ *
+ * @param $from From dir.
+ * @param $to To dir.
+ * @param $move Bool. True to move, false to copy.
+ * @param $preference str to|from If file collisions, which dir has preference.
+ */
+function merge_directories($from, $to, $move=false, $preference='to') {
+	if (!$entries = scandir($from)) {
+		return false;
+	}
+	
+	// character filtering needs to be elsewhere.
+	if (!is_dir($to)) {
+		mkdir($to, 0700, true);
+	}
+	
+	if ($move === true) {
+		$f = 'rename';
+	} else {
+		$f = 'copy';
+	}
+	
+	foreach ($entries as $entry) {
+		if ($entry == '.' || $entry == '..') {
+			continue;
+		}
+		
+		$from_path = $from . $entry;
+		$to_path = $to . $entry;
+		
+		// check to see if the path exists and is a dir, if so, recurse.
+		if (is_dir($from_path) && is_dir($to_path)) {
+			$from_path .= '/';
+			$to_path .= '/';
+			merge_directories($from_path, $to_path, $move, $preference);
+			
+			// since it's a dir that already exists we don't need to move it
+			continue;
+		}
+		
+		// only move if target doesn't exist or if preference is for the from dir
+		if (!file_exists($to_path) || $preference == 'from') {
+			
+			if ($f($from_path, $to_path)) {
+				//elgg_dump("Moved/Copied $from_path to $to_path");
+			}
+		} else {
+			//elgg_dump("Ignoring $from_path -> $to_path");
+		}
+	}
+}
+
+function user_file_matrix($guid) {
+	// lookup the entity
+	$user = get_entity($guid);
+	if ($user->type != 'user')
+	{
+		// only to be used for user directories
+		return FALSE;
+	}
+	
+	if (!$user->time_created) {
+		// fall back to deprecated method
+		return $this->deprecated_file_matrix($user->username);
+	}
+	
+	$time_created = date('Y/m/d', $user->time_created);
+	return "$time_created/$user->guid/";
+}
+
+
+/**
+	Upgrade file locations
+ */
+// loop over all users
+$users = get_data("SELECT * FROM {$CONFIG->dbprefix}users_entity");
+foreach ($users as $user) {
+	$to = $CONFIG->dataroot . user_file_matrix($user->guid);
+	foreach (array('1_0', '1_1', '1_6') as $version) {
+		$function = "file_matrix_$version";
+		$from = $CONFIG->dataroot . $function($user->username);
+		merge_directories($from, $to, $move=TRUE, $preference='from');
+	}
+}
-- 
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