friendica/mod/wall_upload.php

<?php

require_once('Photo.php');

function wall_upload_post(&$a) {

	if($a->argc > 1) {
		$nick = $a->argv[1];
		$r = q("SELECT * FROM `user` WHERE `nickname` = '%s' AND `blocked` = 0 LIMIT 1",
			dbesc($nick)
		);
		if(! count($r))
			return;

	}
	else
		return;

	$can_post  = false;
	$visitor   = 0;

	$page_owner_uid   = $r[0]['uid'];
	$page_owner_nick  = $r[0]['nickname'];
	$community_page   = (($r[0]['page-flags'] == PAGE_COMMUNITY) ? true : false);

	if((local_user()) && (local_user() == $page_owner_uid))
		$can_post = true;
	else {
		if($community_page && remote_user()) {
			$r = q("SELECT `uid` FROM `contact` WHERE `blocked` = 0 AND `pending` = 0 AND `id` = %d AND `uid` = %d LIMIT 1",
				intval(remote_user()),
				intval($page_owner_uid)
			);
			if(count($r)) {
				$can_post = true;
				$visitor = remote_user();
			}
		}
	}

	if(! $can_post) {
		notice( t('Permission denied.') . EOL );
		killme();
	}

	if(! x($_FILES,'userfile'))
		killme();

	$src      = $_FILES['userfile']['tmp_name'];
	$filename = basename($_FILES['userfile']['name']);
	$filesize = intval($_FILES['userfile']['size']);

	$maximagesize = get_config('system','maximagesize');

	if(($maximagesize) && ($filesize > $maximagesize)) {
		echo  sprintf( t('Image exceeds size limit of %d'), $maximagesize) . EOL;
		@unlink($src);
		return;
	}

	$imagedata = @file_get_contents($src);
	$ph = new Photo($imagedata);

	if(! $ph->is_valid()) {
		echo ( t('Unable to process image.') . EOL);
		@unlink($src);
		killme();
	}

	@unlink($src);

	$width = $ph->getWidth();
	$height = $ph->getHeight();

	$hash = photo_new_resource();
	
	$smallest = 0;

	$defperm = '<' . $page_owner_uid . '>';

	$r = $ph->store($page_owner_uid, $visitor, $hash, $filename, t('Wall Photos'), 0, 0, $defperm);

	if(! $r) {
		echo ( t('Image upload failed.') . EOL);
		killme();
	}

	if($width > 640 || $height > 640) {
		$ph->scaleImage(640);
		$r = $ph->store($page_owner_uid, $visitor, $hash, $filename, t('Wall Photos'), 1, 0, $defperm);
		if($r) 
			$smallest = 1;
	}

	if($width > 320 || $height > 320) {
		$ph->scaleImage(320);
		$r = $ph->store($page_owner_uid, $visitor, $hash, $filename, t('Wall Photos'), 2, 0, $defperm);
		if($r)
			$smallest = 2;
	}

	$basename = basename($filename);
	echo  '<br /><br /><a href="' . $a->get_baseurl() . '/photos/' . $page_owner_nick . '/image/' . $hash . '" ><img src="' . $a->get_baseurl() . "/photo/{$hash}-{$smallest}.jpg\" alt=\"$basename\" /></a><br /><br />";

	killme();
	// NOTREACHED
}