From 552796286e4a2a61cc6020b7aa785dc88553e2d0 Mon Sep 17 00:00:00 2001
From: Max Kostikov <max@kostikov.co>
Date: Sun, 24 Jan 2021 21:03:34 +0100
Subject: Add support filesystem storage for xchan profile photos

---
 Zotlabs/Lib/Hashpath.php      | 55 +++++++++++++++++++++++++++++++++++++++++++
 Zotlabs/Module/Photo.php      |  6 ++---
 Zotlabs/Photo/PhotoDriver.php | 31 +++++++++++++++---------
 3 files changed, 78 insertions(+), 14 deletions(-)
 create mode 100644 Zotlabs/Lib/Hashpath.php

(limited to 'Zotlabs')

diff --git a/Zotlabs/Lib/Hashpath.php b/Zotlabs/Lib/Hashpath.php
new file mode 100644
index 000000000..f3b25d2b6
--- /dev/null
+++ b/Zotlabs/Lib/Hashpath.php
@@ -0,0 +1,55 @@
+<?php
+namespace Zotlabs\Lib;
+
+/*
+ * Zotlabs\Lib\Hashpath
+ *
+ * Creates hashed directory structures for fast access and resistance to overloading any single directory with files.
+ *
+ * Takes a $hash which could be any string
+ * a $prefix which is where to place the hash directory in the filesystem, default is current directory
+ * use an empty string for $prefix to place hash directories directly off the root directory
+ * an optional $depth and $slice (default is 2) to indicate the hash level
+ * $depth = 1, 256 directories, suitable for < 384K records/files
+ * $depth = 2, 65536 directories, suitable for < 98M records/files
+ * $depth = 3, 16777216 directories, suitable for < 2.5B records/files
+ * ...
+ * The total number of records anticipated divided by the number of hash directories should generally be kept to
+ * less than 1500 entries for optimum performance though this varies by operating system and filesystem type.
+ * ext4 uses 32 bit inode numbers (~4B record limit) so use caution or alternative filesystem types with $depth above 3. 
+ * an optional $mkdir (boolean) to recursively create the directory (ignoring errors) before returning
+ *
+ * examples: for a $hash of 'abcdefg' and prefix of 'path' the following paths are returned for $depth = 1 and $depth = 3
+ *    path/7d/7d1a54127b222502f5b79b5fb0803061152a44f92b37e23c6527baf665d4da9a
+ *    path/7d/1a/54/7d1a54127b222502f5b79b5fb0803061152a44f92b37e23c6527baf665d4da9a
+ *
+ * see also: boot.php:os_mkdir() - here we provide the equivalent of mkdir -p with permissions of 770. 
+ *
+ */
+ 
+class Hashpath {
+
+	static function path($hash, $prefix = '.', $depth = 1, $slice = 2, $mkdir = true, $alg = false) {
+
+		if ($alg)
+			$hash = hash($alg, $hash);
+
+		$start = 0;
+		if ($depth < 1)
+			$depth = 1;
+		$sluglen = $depth * $slice;
+
+		do {
+			$slug	  = substr($hash, $start, $slice);
+			$prefix  .= '/' . $slug;
+			$start	 += $slice;
+			$sluglen -= $slice;
+		}
+		while ($sluglen);
+
+		if ($mkdir)
+			os_mkdir($prefix, STORAGE_DEFAULT_PERMISSIONS, true);
+		
+		return $prefix . '/' . $hash;
+	}
+}
diff --git a/Zotlabs/Module/Photo.php b/Zotlabs/Module/Photo.php
index 041bdf5a2..ee360dac5 100644
--- a/Zotlabs/Module/Photo.php
+++ b/Zotlabs/Module/Photo.php
@@ -194,9 +194,9 @@ class Photo extends \Zotlabs\Web\Controller {
 					$mimetype = $e[0]['mimetype'];
 					$modified = strtotime($e[0]['edited'] . 'Z');
 
-					if(intval($e[0]['os_storage'])) {
+					if(intval($e[0]['os_storage']))
 						$streaming = $data;
-					}
+
 					if($e[0]['allow_cid'] != '' || $e[0]['allow_gid'] != '' || $e[0]['deny_gid'] != '' || $e[0]['deny_gid'] != '')
 						$prvcachecontrol = 'no-store, no-cache, must-revalidate';
 				}
@@ -282,7 +282,7 @@ class Photo extends \Zotlabs\Web\Controller {
 		header("Content-Length: " . (isset($filesize) ? $filesize : strlen($data)));
 
 		// If it's a file resource, stream it. 
-		if($streaming && $channel) {
+		if($streaming) {
 			if(strpos($streaming,'store') !== false)
 				$istream = fopen($streaming,'rb');
 			else
diff --git a/Zotlabs/Photo/PhotoDriver.php b/Zotlabs/Photo/PhotoDriver.php
index 94d2c3436..4c4f26e32 100644
--- a/Zotlabs/Photo/PhotoDriver.php
+++ b/Zotlabs/Photo/PhotoDriver.php
@@ -2,6 +2,8 @@
 
 namespace Zotlabs\Photo;
 
+use Zotlabs\Lib\Hashpath; 
+
 /**
  * @brief Abstract photo driver class.
  *
@@ -505,18 +507,25 @@ abstract class PhotoDriver {
 	 * @return boolean
 	 */
 	public function storeThumbnail($arr, $scale = 0) {
-	    
-	    // We only process thumbnails here
-	    if($scale == 0)
-	        return false;
-	    
-	    $arr['imgscale'] = $scale;
-
-		if(boolval(get_config('system','filesystem_storage_thumbnails', 0))) {
-			$channel = channelx_by_n($arr['uid']);
+
+		// We only process thumbnails here
+		if($scale == 0)
+			return false;
+
+		$arr['imgscale'] = $scale;
+
+		if(boolval(get_config('system','photo_storage_type', 1))) {
+
 			$arr['os_storage'] = 1;
-			$arr['os_syspath'] = 'store/' . $channel['channel_address'] . '/' . $arr['os_path'] . '-' . $scale;
-			if(! $this->saveImage($arr['os_syspath']))
+
+			if (array_key_exists('uid', $arr) && ! in_array($scale, [ PHOTO_RES_PROFILE_300, PHOTO_RES_PROFILE_80, PHOTO_RES_PROFILE_48 ])) {
+				$channel = channelx_by_n($arr['uid']);
+				$arr['os_syspath'] = 'store/' . $channel['channel_address'] . '/' . $arr['os_path'] . '-' . $scale;
+			}
+			else
+				$arr['os_syspath'] = Hashpath::path($arr['resource_id'], 'store/[data]/[xchan]', 2, 1) . '-' . $scale;
+
+			if (! $this->saveImage($arr['os_syspath']))
 				return false;
 		}
 		else
-- 
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