sql = $sql;
$this->variables = $variables;
}
public function append($querylet) {
assert(!is_null($querylet));
$this->sql .= $querylet->sql;
$this->variables = array_merge($this->variables, $querylet->variables);
}
public function append_sql($sql) {
$this->sql .= $sql;
}
public function add_variable($var) {
$this->variables[] = $var;
}
}
class TagQuerylet {
var $tag;
var $positive;
public function TagQuerylet($tag, $positive) {
$this->tag = $tag;
$this->positive = $positive;
}
}
class ImgQuerylet {
var $qlet;
var $positive;
public function ImgQuerylet($qlet, $positive) {
$this->qlet = $qlet;
$this->positive = $positive;
}
}
// }}}
// {{{ dbengines
class DBEngine {
var $name = null;
var $auto_increment = null;
var $create_table_extras = "";
}
class MySQL extends DBEngine {
var $name = "mysql";
var $auto_increment = "INTEGER PRIMARY KEY auto_increment";
var $create_table_extras = "TYPE=INNODB DEFAULT CHARSET='utf8'";
function init($db) {
$db->Execute("SET NAMES utf8;");
}
}
class PostgreSQL extends DBEngine {
var $name = "pgsql";
var $auto_increment = "SERIAL PRIMARY KEY";
function init($db) {
}
}
//}}}
/*
* A class for controlled database access, available through "global $database"
*/
class Database {
var $db;
var $extensions;
var $cache_hits = 0, $cache_misses = 0;
var $engine = null;
/*
* Create a new database object using connection info
* stored in config.php in the root shimmie folder
*/
public function Database() {
if(is_readable("config.php")) {
require_once "config.php";
$this->engine = new MySQL();
$this->db = @NewADOConnection($database_dsn);
$this->use_memcache = isset($memcache);
if($this->db) {
$this->db->SetFetchMode(ADODB_FETCH_ASSOC);
$this->engine->init($this->db);
}
else {
$version = VERSION;
print "
Internal error - Shimmie-$version
Internal error: Could not connect to database
";
exit;
}
if($this->use_memcache) {
$this->memcache = new Memcache;
$this->memcache->pconnect('localhost', 11211) or ($this->use_memcache = false);
}
}
else {
header("Location: install.php");
exit;
}
}
// memcache {{{
public function cache_get($key) {
assert(!is_null($key));
if($this->use_memcache) {
$val = $this->memcache->get($key);
if($val) {
$this->cache_hits++;
return $val;
}
else {
$this->cache_misses++;
}
}
return false;
}
public function cache_set($key, $val, $time=0) {
assert(!is_null($key));
if($this->use_memcache) {
$this->memcache->set($key, $val, false, $time);
}
}
public function cache_delete($key) {
assert(!is_null($key));
if($this->use_memcache) {
$this->memcache->delete($key);
}
}
// }}}
// misc {{{
public function execute($query, $args=array()) {
$result = $this->db->Execute($query, $args);
if($result === False) {
print "SQL Error: " . $this->db->ErrorMsg();
print "
Query: $query";
print "
Args: "; print_r($args);
exit;
}
return $result;
}
public function get_all($query, $args=array()) {
$result = $this->db->GetAll($query, $args);
if($result === False) {
print "SQL Error: " . $this->db->ErrorMsg();
print "
Query: $query";
print "
Args: "; print_r($args);
exit;
}
return $result;
}
public function get_row($query, $args=array()) {
$result = $this->db->GetRow($query, $args);
if($result === False) {
print "SQL Error: " . $this->db->ErrorMsg();
print "
Query: $query";
print "
Args: "; print_r($args);
exit;
}
if(count($result) == 0) {
return null;
}
else {
return $result;
}
}
public function upgrade_schema($filename) {
$this->install_schema($filename);
}
public function install_schema($filename) {
//print "
upgrading $filename";
global $config;
if($config->get_bool("in_upgrade")) return;
$config->set_bool("in_upgrade", true);
require_once "lib/adodb/adodb-xmlschema03.inc.php";
$schema = new adoSchema($this->db);
$sql = $schema->ParseSchema($filename);
//echo ""; var_dump($sql); echo "
";
$result = $schema->ExecuteSchema();
if(!$result) {
die("Error creating tables from XML schema ($filename)");
}
$config->set_bool("in_upgrade", false);
}
// }}}
// tags {{{
public function resolve_alias($tag) {
assert(is_string($tag));
$newtag = $this->db->GetOne("SELECT newtag FROM aliases WHERE oldtag=?", array($tag));
if(!empty($newtag)) {
return $newtag;
} else {
return $tag;
}
}
public function resolve_wildcard($tag) {
if(strpos($tag, "%") === false && strpos($tag, "_") === false) {
return array($tag);
}
else {
$newtags = $this->db->GetCol("SELECT tag FROM tags WHERE tag LIKE ?", array($tag));
if(count($newtags) > 0) {
$resolved = $newtags;
} else {
$resolved = array($tag);
}
return $resolved;
}
}
public function sanitise($tag) {
assert(is_string($tag));
$tag = preg_replace("/[\s?*]/", "", $tag);
$tag = preg_replace("/\.+/", ".", $tag);
$tag = preg_replace("/^(\.+[\/\\\\])+/", "", $tag);
return $tag;
}
public function delete_tags_from_image($image_id) {
assert(is_numeric($image_id));
$this->execute("UPDATE tags SET count = count - 1 WHERE id IN (SELECT tag_id FROM image_tags WHERE image_id = ?)", array($image_id));
$this->execute("DELETE FROM image_tags WHERE image_id=?", array($image_id));
}
public function set_tags($image_id, $tags) {
assert(is_numeric($image_id));
$tags = tag_explode($tags);
$tags = array_map(array($this, 'resolve_alias'), $tags);
$tags = array_map(array($this, 'sanitise'), $tags);
$tags = array_iunique($tags); // remove any duplicate tags
// delete old
$this->delete_tags_from_image($image_id);
// insert each new tag
foreach($tags as $tag) {
$this->execute("INSERT IGNORE INTO tags(tag) VALUES (?)", array($tag));
$this->execute("INSERT INTO image_tags(image_id, tag_id) VALUES(?, (SELECT id FROM tags WHERE tag = ?))", array($image_id, $tag));
$this->execute("UPDATE tags SET count = count + 1 WHERE tag = ?", array($tag));
}
}
public function set_source($image_id, $source) {
assert(is_numeric($image_id));
if(empty($source)) $source = null;
$this->execute("UPDATE images SET source=? WHERE id=?", array($source, $image_id));
}
// }}}
}
?>