1119 lines
30 KiB
PHP
1119 lines
30 KiB
PHP
<?php
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/**
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* All the imageboard-specific bits of code should be in this file, everything
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* else in /core should be standard SCore bits.
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*/
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/**
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* \page search Shimmie2: Searching
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*
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* The current search system is built of several search item -> image ID list
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* translators, eg:
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*
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* \li the item "fred" will search the image_tags table to find image IDs with the fred tag
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* \li the item "size=640x480" will search the images table to find image IDs of 640x480 images
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*
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* So the search "fred size=640x480" will calculate two lists and take the
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* intersection. (There are some optimisations in there making it more
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* complicated behind the scenes, but as long as you can turn a single word
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* into a list of image IDs, making a search plugin should be simple)
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*/
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Classes *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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$tag_n = 0; // temp hack
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$_flexihash = null;
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$_fh_last_opts = null;
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require_once "lib/flexihash.php";
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/**
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* An object representing an entry in the images table. As of 2.2, this no
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* longer necessarily represents an image per se, but could be a video,
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* sound file, or any other supported upload type.
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*/
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class Image {
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var $id = null;
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var $height, $width;
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var $hash, $filesize;
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var $filename, $ext;
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var $owner_ip;
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var $posted;
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var $source;
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var $locked;
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/**
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* One will very rarely construct an image directly, more common
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* would be to use Image::by_id, Image::by_hash, etc
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*/
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public function Image($row=null) {
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if(!is_null($row)) {
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foreach($row as $name => $value) {
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// some databases use table.name rather than name
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$name = str_replace("images.", "", $name);
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$this->$name = $value; // hax
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}
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$this->posted_timestamp = strtotime($this->posted); // pray
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$this->locked = bool_escape($this->locked);
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assert(is_numeric($this->id));
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assert(is_numeric($this->height));
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assert(is_numeric($this->width));
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}
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}
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/**
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* Find an image by ID
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*
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* @retval Image
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*/
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public static function by_id(/*int*/ $id) {
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assert(is_numeric($id));
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global $database;
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$image = null;
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$row = $database->get_row("SELECT * FROM images WHERE images.id=:id", array("id"=>$id));
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return ($row ? new Image($row) : null);
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}
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/**
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* Find an image by hash
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*
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* @retval Image
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*/
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public static function by_hash(/*string*/ $hash) {
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assert(is_string($hash));
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global $database;
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$image = null;
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$row = $database->get_row("SELECT images.* FROM images WHERE hash=:hash", array("hash"=>$hash));
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return ($row ? new Image($row) : null);
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}
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/**
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* Pick a random image out of a set
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*
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* @retval Image
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*/
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public static function by_random($tags=array()) {
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assert(is_array($tags));
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$max = Image::count_images($tags);
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if ($max < 1) return null; // From Issue #22 - opened by HungryFeline on May 30, 2011.
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$rand = mt_rand(0, $max-1);
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$set = Image::find_images($rand, 1, $tags);
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if(count($set) > 0) return $set[0];
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else return null;
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}
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/**
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* Search for an array of images
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*
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* @retval Array
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*/
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public static function find_images(/*int*/ $start, /*int*/ $limit, $tags=array()) {
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assert(is_numeric($start));
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assert(is_numeric($limit));
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assert(is_array($tags));
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global $database, $user;
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$images = array();
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if($start < 0) $start = 0;
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if($limit < 1) $limit = 1;
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if(SPEED_HAX) {
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if(!$user->can("big_search") and count($tags) > 3) {
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die("Anonymous users may only search for up to 3 tags at a time"); // FIXME: throw an exception?
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}
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}
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$querylet = Image::build_search_querylet($tags);
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$querylet->append(new Querylet("ORDER BY images.id DESC LIMIT :limit OFFSET :offset", array("limit"=>$limit, "offset"=>$start)));
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#var_dump($querylet->sql); var_dump($querylet->variables);
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$result = $database->execute($querylet->sql, $querylet->variables);
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while($row = $result->fetch()) {
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$images[] = new Image($row);
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}
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return $images;
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}
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/*
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* Image-related utility functions
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*/
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/**
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* Count the number of image results for a given search
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*/
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public static function count_images($tags=array()) {
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assert(is_array($tags));
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global $database;
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if(count($tags) == 0) {
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$total = $database->cache->get("image-count");
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if(!$total) {
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$total = $database->get_one("SELECT COUNT(*) FROM images");
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$database->cache->set("image-count", $total, 600);
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}
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return $total;
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}
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else if(count($tags) == 1 && !preg_match("/[:=><\*\?]/", $tags[0])) {
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$term = Tag::resolve_alias($tags[0]);
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return $database->get_one(
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$database->scoreql_to_sql("SELECT count FROM tags WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)"),
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array("tag"=>$term));
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}
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else {
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$querylet = Image::build_search_querylet($tags);
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$result = $database->execute($querylet->sql, $querylet->variables);
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return $result->rowCount();
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}
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}
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/**
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* Count the number of pages for a given search
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*/
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public static function count_pages($tags=array()) {
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assert(is_array($tags));
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global $config, $database;
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return ceil(Image::count_images($tags) / $config->get_int('index_images'));
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}
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/*
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* Accessors & mutators
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*/
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/**
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* Find the next image in the sequence.
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*
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* Rather than simply $this_id + 1, one must take into account
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* deleted images and search queries
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*
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* @retval Image
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*/
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public function get_next($tags=array(), $next=true) {
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assert(is_array($tags));
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assert(is_bool($next));
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global $database;
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if($next) {
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$gtlt = "<";
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$dir = "DESC";
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}
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else {
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$gtlt = ">";
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$dir = "ASC";
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}
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if(count($tags) == 0) {
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$row = $database->get_row('SELECT images.* FROM images WHERE images.id '.$gtlt.' '.$this->id.' ORDER BY images.id '.$dir.' LIMIT 1');
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}
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else {
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$tags[] = 'id'. $gtlt . $this->id;
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$querylet = Image::build_search_querylet($tags);
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$querylet->append_sql(' ORDER BY images.id '.$dir.' LIMIT 1');
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$row = $database->get_row($querylet->sql, $querylet->variables);
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}
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return ($row ? new Image($row) : null);
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}
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/**
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* The reverse of get_next
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*
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* @retval Image
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*/
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public function get_prev($tags=array()) {
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return $this->get_next($tags, false);
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}
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/**
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* Find the User who owns this Image
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*
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* @retval User
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*/
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public function get_owner() {
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return User::by_id($this->owner_id);
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}
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/**
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* Set the image's owner
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*/
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public function set_owner(User $owner) {
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global $database;
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if($owner->id != $this->owner_id) {
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$database->execute("UPDATE images SET owner_id=:owner_id WHERE id=:id", array("owner_id"=>$owner->id, "id"=>$this->id));
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log_info("core-image", "Owner for Image #{$this->id} set to {$owner->name}");
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}
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}
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/**
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* Get this image's tags as an array
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*/
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public function get_tag_array() {
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global $database;
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if(!isset($this->tag_array)) {
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$this->tag_array = $database->get_col("SELECT tag FROM image_tags JOIN tags ON image_tags.tag_id = tags.id WHERE image_id=:id ORDER BY tag", array("id"=>$this->id));
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}
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return $this->tag_array;
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}
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/**
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* Get this image's tags as a string
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*/
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public function get_tag_list() {
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return Tag::implode($this->get_tag_array());
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}
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/**
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* Get the URL for the full size image
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*
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* @retval string
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*/
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public function get_image_link() {
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global $config;
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$image_ilink = $config->get_string('image_ilink'); // store a copy for speed.
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if( !empty($image_ilink) ) { /* empty is faster than strlen */
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if(!startsWith($image_ilink, "http://") && !startsWith($image_ilink, "/")) {
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$image_ilink = make_link($image_ilink);
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}
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return $this->parse_link_template($image_ilink);
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}
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else if($config->get_bool('nice_urls', false)) {
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return $this->parse_link_template(make_link('_images/$hash/$id%20-%20$tags.$ext'));
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}
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else {
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return $this->parse_link_template(make_link('image/$id.$ext'));
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}
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}
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/**
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* Get a short link to the full size image
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*
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* @deprecated
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* @retval string
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*/
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public function get_short_link() {
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global $config;
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return $this->parse_link_template($config->get_string('image_slink'));
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}
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/**
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* Get the URL for the thumbnail
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*
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* @retval string
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*/
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public function get_thumb_link() {
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global $config;
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$image_tlink = $config->get_string('image_tlink'); // store a copy for speed.
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if( !empty($image_tlink) ) { /* empty is faster than strlen */
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if(!startsWith($image_tlink, "http://") && !startsWith($image_tlink, "/")) {
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$image_tlink = make_link($image_tlink);
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}
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return $this->parse_link_template($image_tlink);
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}
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else if($config->get_bool('nice_urls', false)) {
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return $this->parse_link_template(make_link('_thumbs/$hash/thumb.jpg'));
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}
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else {
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return $this->parse_link_template(make_link('thumb/$id.jpg'));
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}
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}
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/**
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* Get the tooltip for this image, formatted according to the
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* configured template
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*
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* @retval string
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*/
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public function get_tooltip() {
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global $config;
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$tt = $this->parse_link_template($config->get_string('image_tip'), "no_escape");
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// Removes the size tag if the file is an mp3
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if($this->ext === 'mp3'){
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$iitip = $tt;
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$mp3tip = array("0x0");
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$h_tip = str_replace($mp3tip, " ", $iitip);
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// Makes it work with a variation of the default tooltips (I.E $tags // $filesize // $size)
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$justincase = array(" //", "// ", " //", "// ", " ");
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if(strstr($h_tip, " ")) {
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$h_tip = html_escape(str_replace($justincase, "", $h_tip));
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}else{
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$h_tip = html_escape($h_tip);
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}
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return $h_tip;
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}
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else {
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return $tt;
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}
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}
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/**
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* Figure out where the full size image is on disk
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*
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* @retval string
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*/
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public function get_image_filename() {
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return warehouse_path("images", $this->hash);
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}
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/**
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* Figure out where the thumbnail is on disk
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*
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* @retval string
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*/
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public function get_thumb_filename() {
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return warehouse_path("thumbs", $this->hash);
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}
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/**
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* Get the original filename
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*
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* @retval string
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*/
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public function get_filename() {
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return $this->filename;
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}
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/**
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* Get the image's mime type
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*
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* @retval string
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*/
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public function get_mime_type() {
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return getMimeType($this->get_image_filename(), $this->get_ext());
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}
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/**
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* Get the image's filename extension
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*
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* @retval string
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*/
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public function get_ext() {
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return $this->ext;
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}
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/**
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* Get the image's source URL
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*
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* @retval string
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*/
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public function get_source() {
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return $this->source;
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}
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/**
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* Set the image's source URL
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*/
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public function set_source(/*string*/ $new_source) {
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global $database;
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$old_source = $this->source;
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if(empty($new_source)) $new_source = null;
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if($new_source != $old_source) {
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$database->execute("UPDATE images SET source=:source WHERE id=:id", array("source"=>$new_source, "id"=>$this->id));
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log_info("core-image", "Source for Image #{$this->id} set to: $new_source (was $old_source)");
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}
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}
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/**
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* Check if the image is locked.
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* @retval bool
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*/
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public function is_locked() {
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return $this->locked;
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}
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public function set_locked($tf) {
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global $database;
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$ln = $tf ? "Y" : "N";
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$sln = $database->scoreql_to_sql('SCORE_BOOL_'.$ln);
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$sln = str_replace("'", "", $sln);
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$sln = str_replace('"', "", $sln);
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if(bool_escape($sln) !== $this->locked) {
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$database->execute("UPDATE images SET locked=:yn WHERE id=:id", array("yn"=>$sln, "id"=>$this->id));
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log_info("core-image", "Setting Image #{$this->id} lock to: $ln");
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}
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}
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/**
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* Delete all tags from this image.
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*
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* Normally in preparation to set them to a new set.
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*/
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public function delete_tags_from_image() {
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global $database;
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$database->execute(
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"UPDATE tags SET count = count - 1 WHERE id IN ".
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"(SELECT tag_id FROM image_tags WHERE image_id = :id)", array("id"=>$this->id));
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$database->execute("DELETE FROM image_tags WHERE image_id=:id", array("id"=>$this->id));
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}
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/**
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* Set the tags for this image
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*/
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public function set_tags($tags) {
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global $database;
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$tags = Tag::resolve_list($tags);
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assert(is_array($tags));
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assert(count($tags) > 0);
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$new_tags = implode(" ", $tags);
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if($new_tags != $this->get_tag_list()) {
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// delete old
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$this->delete_tags_from_image();
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// insert each new tags
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foreach($tags as $tag) {
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$id = $database->get_one(
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$database->scoreql_to_sql(
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"SELECT id FROM tags WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)"
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),
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array("tag"=>$tag));
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if(empty($id)) {
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// a new tag
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$database->execute(
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"INSERT INTO tags(tag) VALUES (:tag)",
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array("tag"=>$tag));
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$database->execute(
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"INSERT INTO image_tags(image_id, tag_id)
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VALUES(:id, (SELECT id FROM tags WHERE tag = :tag))",
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array("id"=>$this->id, "tag"=>$tag));
|
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}
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else {
|
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// user of an existing tag
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$database->execute(
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"INSERT INTO image_tags(image_id, tag_id) VALUES(:iid, :tid)",
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array("iid"=>$this->id, "tid"=>$id));
|
|
}
|
|
$database->execute(
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$database->scoreql_to_sql(
|
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"UPDATE tags SET count = count + 1 WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)"
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),
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array("tag"=>$tag));
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}
|
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|
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log_info("core-image", "Tags for Image #{$this->id} set to: ".implode(" ", $tags));
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$database->cache->delete("image-{$this->id}-tags");
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}
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}
|
|
|
|
/**
|
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* Delete this image from the database and disk
|
|
*/
|
|
public function delete() {
|
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global $database;
|
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$this->delete_tags_from_image();
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$database->execute("DELETE FROM images WHERE id=:id", array("id"=>$this->id));
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log_info("core-image", 'Deleted Image #'.$this->id.' ('.$this->hash.')');
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|
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unlink($this->get_image_filename());
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unlink($this->get_thumb_filename());
|
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}
|
|
|
|
/**
|
|
* This function removes an image (and thumbnail) from the DISK ONLY.
|
|
* It DOES NOT remove anything from the database.
|
|
*/
|
|
public function remove_image_only() {
|
|
log_info("core-image", 'Removed Image File ('.$this->hash.')');
|
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@unlink($this->get_image_filename());
|
|
@unlink($this->get_thumb_filename());
|
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}
|
|
|
|
/**
|
|
* Someone please explain this
|
|
*
|
|
* @retval string
|
|
*/
|
|
public function parse_link_template($tmpl, $_escape="url_escape") {
|
|
global $config;
|
|
|
|
// don't bother hitting the database if it won't be used...
|
|
$tags = "";
|
|
if(strpos($tmpl, '$tags') !== false) { // * stabs dynamically typed languages with a rusty spoon *
|
|
$tags = $this->get_tag_list();
|
|
$tags = str_replace("/", "", $tags);
|
|
$tags = preg_replace("/^\.+/", "", $tags);
|
|
}
|
|
|
|
$base_href = $config->get_string('base_href');
|
|
$fname = $this->get_filename();
|
|
$base_fname = strpos($fname, '.') ? substr($fname, 0, strrpos($fname, '.')) : $fname;
|
|
|
|
$tmpl = str_replace('$id', $this->id, $tmpl);
|
|
$tmpl = str_replace('$hash_ab', substr($this->hash, 0, 2), $tmpl);
|
|
$tmpl = str_replace('$hash_cd', substr($this->hash, 2, 2), $tmpl);
|
|
$tmpl = str_replace('$hash', $this->hash, $tmpl);
|
|
$tmpl = str_replace('$tags', $_escape($tags), $tmpl);
|
|
$tmpl = str_replace('$base', $base_href, $tmpl);
|
|
$tmpl = str_replace('$ext', $this->ext, $tmpl);
|
|
$tmpl = str_replace('$size', "{$this->width}x{$this->height}", $tmpl);
|
|
$tmpl = str_replace('$filesize', to_shorthand_int($this->filesize), $tmpl);
|
|
$tmpl = str_replace('$filename', $_escape($base_fname), $tmpl);
|
|
$tmpl = str_replace('$title', $_escape($config->get_string("title")), $tmpl);
|
|
|
|
// nothing seems to use this, sending the event out to 50 exts is a lot of overhead
|
|
if(!SPEED_HAX) {
|
|
$plte = new ParseLinkTemplateEvent($tmpl, $this);
|
|
send_event($plte);
|
|
$tmpl = $plte->link;
|
|
}
|
|
|
|
global $_flexihash, $_fh_last_opts;
|
|
$matches = array();
|
|
if(preg_match("/(.*){(.*)}(.*)/", $tmpl, $matches)) {
|
|
$pre = $matches[1];
|
|
$opts = $matches[2];
|
|
$post = $matches[3];
|
|
|
|
if($opts != $_fh_last_opts) {
|
|
$_fh_last_opts = $opts;
|
|
$_flexihash = new Flexihash();
|
|
foreach(explode(",", $opts) as $opt) {
|
|
$parts = explode("=", $opt);
|
|
$opt_val = "";
|
|
$opt_weight = 0;
|
|
if(count($parts) == 2) {
|
|
$opt_val = $parts[0];
|
|
$opt_weight = $parts[1];
|
|
}
|
|
elseif(count($parts) == 1) {
|
|
$opt_val = $parts[0];
|
|
$opt_weight = 1;
|
|
}
|
|
$_flexihash->addTarget($opt_val, $opt_weight);
|
|
}
|
|
}
|
|
|
|
$choice = $_flexihash->lookup($pre.$post);
|
|
$tmpl = $pre.$choice.$post;
|
|
}
|
|
|
|
return $tmpl;
|
|
}
|
|
|
|
private static function build_search_querylet($terms) {
|
|
assert(is_array($terms));
|
|
global $database;
|
|
if($database->get_driver_name() === "mysql")
|
|
return Image::build_ugly_search_querylet($terms);
|
|
else
|
|
return Image::build_accurate_search_querylet($terms);
|
|
}
|
|
|
|
/**
|
|
* WARNING: this description is no longer accurate, though it does get across
|
|
* the general idea - the actual method has a few extra optimisiations
|
|
*
|
|
* "foo bar -baz user=foo" becomes
|
|
*
|
|
* SELECT * FROM images WHERE
|
|
* images.id IN (SELECT image_id FROM image_tags WHERE tag='foo')
|
|
* AND images.id IN (SELECT image_id FROM image_tags WHERE tag='bar')
|
|
* AND NOT images.id IN (SELECT image_id FROM image_tags WHERE tag='baz')
|
|
* AND images.id IN (SELECT id FROM images WHERE owner_name='foo')
|
|
*
|
|
* This is:
|
|
* A) Incredibly simple:
|
|
* Each search term maps to a list of image IDs
|
|
* B) Runs really fast on a good database:
|
|
* These lists are calucalted once, and the set intersection taken
|
|
* C) Runs really slow on bad databases:
|
|
* All the subqueries are executed every time for every row in the
|
|
* images table. Yes, MySQL does suck this much.
|
|
*/
|
|
private static function build_accurate_search_querylet($terms) {
|
|
global $config, $database;
|
|
|
|
$tag_querylets = array();
|
|
$img_querylets = array();
|
|
$positive_tag_count = 0;
|
|
|
|
$stpe = new SearchTermParseEvent(null, $terms);
|
|
send_event($stpe);
|
|
if($stpe->is_querylet_set()) {
|
|
foreach($stpe->get_querylets() as $querylet) {
|
|
$img_querylets[] = new ImgQuerylet($querylet, true);
|
|
}
|
|
}
|
|
|
|
// parse the words that are searched for into
|
|
// various types of querylet
|
|
foreach($terms as $term) {
|
|
$positive = true;
|
|
if(is_string($term) && !empty($term) && ($term[0] == '-')) {
|
|
$positive = false;
|
|
$term = substr($term, 1);
|
|
}
|
|
if(strlen($term) == 0) {
|
|
continue;
|
|
}
|
|
|
|
$term = Tag::resolve_alias($term);
|
|
|
|
$stpe = new SearchTermParseEvent($term, $terms);
|
|
send_event($stpe);
|
|
if($stpe->is_querylet_set()) {
|
|
foreach($stpe->get_querylets() as $querylet) {
|
|
$img_querylets[] = new ImgQuerylet($querylet, $positive);
|
|
}
|
|
}
|
|
else {
|
|
$expansions = Tag::resolve_wildcard($term);
|
|
if($expansions && $positive) $positive_tag_count++;
|
|
foreach($expansions as $term) {
|
|
$tag_querylets[] = new TagQuerylet($term, $positive);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// merge all the image metadata searches into one generic querylet
|
|
$n = 0;
|
|
$sql = "";
|
|
$terms = array();
|
|
foreach($img_querylets as $iq) {
|
|
if($n++ > 0) $sql .= " AND";
|
|
if(!$iq->positive) $sql .= " NOT";
|
|
$sql .= " (" . $iq->qlet->sql . ")";
|
|
$terms = array_merge($terms, $iq->qlet->variables);
|
|
}
|
|
$img_search = new Querylet($sql, $terms);
|
|
|
|
|
|
// no tags, do a simple search (+image metadata if we have any)
|
|
if(count($tag_querylets) == 0) {
|
|
$query = new Querylet("SELECT images.* FROM images ");
|
|
|
|
if(!empty($img_search->sql)) {
|
|
$query->append_sql(" WHERE ");
|
|
$query->append($img_search);
|
|
}
|
|
}
|
|
|
|
// one positive tag (a common case), do an optimised search
|
|
else if(count($tag_querylets) == 1 && $tag_querylets[0]->positive) {
|
|
$query = new Querylet($database->scoreql_to_sql("
|
|
SELECT images.* FROM images
|
|
JOIN image_tags ON images.id=image_tags.image_id
|
|
JOIN tags ON image_tags.tag_id=tags.id
|
|
WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)
|
|
"), array("tag"=>$tag_querylets[0]->tag));
|
|
|
|
if(!empty($img_search->sql)) {
|
|
$query->append_sql(" AND ");
|
|
$query->append($img_search);
|
|
}
|
|
}
|
|
|
|
// more than one positive tag, or more than zero negative tags
|
|
else {
|
|
$positive_tag_id_array = array();
|
|
$negative_tag_id_array = array();
|
|
$tags_ok = true;
|
|
|
|
foreach($tag_querylets as $tq) {
|
|
$tag_ids = $database->get_col(
|
|
$database->scoreql_to_sql(
|
|
"SELECT id FROM tags WHERE SCORE_STRNORM(tag) = SCORE_STRNORM(:tag)"
|
|
),
|
|
array("tag"=>$tq->tag));
|
|
if($tq->positive) {
|
|
$positive_tag_id_array = array_merge($positive_tag_id_array, $tag_ids);
|
|
$tags_ok = count($tag_ids) > 0;
|
|
if(!$tags_ok) break;
|
|
}
|
|
else {
|
|
$negative_tag_id_array = array_merge($negative_tag_id_array, $tag_ids);
|
|
}
|
|
}
|
|
|
|
if($tags_ok) {
|
|
$have_pos = count($positive_tag_id_array) > 0;
|
|
$have_neg = count($negative_tag_id_array) > 0;
|
|
|
|
$sql = "SELECT images.* FROM images WHERE images.id IN (";
|
|
if($have_pos) {
|
|
$positive_tag_id_list = join(', ', $positive_tag_id_array);
|
|
$sql .= "
|
|
SELECT image_id
|
|
FROM image_tags
|
|
WHERE tag_id IN ($positive_tag_id_list)
|
|
GROUP BY image_id
|
|
HAVING COUNT(image_id)>=$positive_tag_count
|
|
";
|
|
}
|
|
if($have_pos && $have_neg) {
|
|
$sql .= " EXCEPT ";
|
|
}
|
|
if($have_neg) {
|
|
$negative_tag_id_list = join(', ', $negative_tag_id_array);
|
|
$sql .= "
|
|
SELECT image_id
|
|
FROM image_tags
|
|
WHERE tag_id IN ($negative_tag_id_list)
|
|
";
|
|
}
|
|
$sql .= ")";
|
|
$query = new Querylet($sql);
|
|
|
|
if(strlen($img_search->sql) > 0) {
|
|
$query->append_sql(" AND ");
|
|
$query->append($img_search);
|
|
}
|
|
}
|
|
else {
|
|
# one of the positive tags had zero results, therefor there
|
|
# can be no results; "where 1=0" should shortcut things
|
|
$query = new Querylet("
|
|
SELECT images.*
|
|
FROM images
|
|
WHERE 1=0
|
|
");
|
|
}
|
|
}
|
|
|
|
return $query;
|
|
}
|
|
|
|
/**
|
|
* this function exists because mysql is a turd, see the docs for
|
|
* build_accurate_search_querylet() for a full explanation
|
|
*/
|
|
private static function build_ugly_search_querylet($terms) {
|
|
global $config, $database;
|
|
|
|
$tag_querylets = array();
|
|
$img_querylets = array();
|
|
$positive_tag_count = 0;
|
|
$negative_tag_count = 0;
|
|
|
|
$stpe = new SearchTermParseEvent(null, $terms);
|
|
send_event($stpe);
|
|
if($stpe->is_querylet_set()) {
|
|
foreach($stpe->get_querylets() as $querylet) {
|
|
$img_querylets[] = new ImgQuerylet($querylet, true);
|
|
}
|
|
}
|
|
|
|
reset($terms); // rewind to first element in array.
|
|
|
|
// turn each term into a specific type of querylet
|
|
foreach($terms as $term) {
|
|
$negative = false;
|
|
if( !empty($term) && ($term[0] == '-')) {
|
|
$negative = true;
|
|
$term = substr($term, 1);
|
|
}
|
|
|
|
$term = Tag::resolve_alias($term);
|
|
|
|
$stpe = new SearchTermParseEvent($term, $terms);
|
|
send_event($stpe);
|
|
if($stpe->is_querylet_set()) {
|
|
foreach($stpe->get_querylets() as $querylet) {
|
|
$img_querylets[] = new ImgQuerylet($querylet, !$negative);
|
|
}
|
|
}
|
|
else {
|
|
$term = str_replace("*", "%", $term);
|
|
$term = str_replace("?", "_", $term);
|
|
if(!preg_match("/^[%_]+$/", $term)) {
|
|
$tag_querylets[] = new TagQuerylet($term, !$negative);
|
|
}
|
|
}
|
|
}
|
|
|
|
// merge all the tag querylets into one generic one
|
|
$sql = "0";
|
|
$terms = array();
|
|
foreach($tag_querylets as $tq) {
|
|
global $tag_n;
|
|
$sign = $tq->positive ? "+" : "-";
|
|
//$sql .= " $sign (tag LIKE :tag$tag_n)";
|
|
$sql .= ' '.$sign.' (tag LIKE :tag'.$tag_n.')';
|
|
//$terms["tag$tag_n"] = $tq->tag;
|
|
$terms['tag'.$tag_n] = $tq->tag;
|
|
$tag_n++;
|
|
|
|
if($sign === "+") $positive_tag_count++;
|
|
else $negative_tag_count++;
|
|
}
|
|
$tag_search = new Querylet($sql, $terms);
|
|
|
|
// merge all the image metadata searches into one generic querylet
|
|
$n = 0;
|
|
$sql = "";
|
|
$terms = array();
|
|
foreach($img_querylets as $iq) {
|
|
if($n++ > 0) $sql .= " AND";
|
|
if(!$iq->positive) $sql .= " NOT";
|
|
$sql .= " (" . $iq->qlet->sql . ")";
|
|
$terms = array_merge($terms, $iq->qlet->variables);
|
|
}
|
|
$img_search = new Querylet($sql, $terms);
|
|
|
|
|
|
// no tags, do a simple search (+image metadata if we have any)
|
|
if($positive_tag_count + $negative_tag_count == 0) {
|
|
$query = new Querylet("SELECT images.*,UNIX_TIMESTAMP(posted) AS posted_timestamp FROM images ");
|
|
|
|
if(!empty($img_search->sql)) {
|
|
$query->append_sql(" WHERE ");
|
|
$query->append($img_search);
|
|
}
|
|
}
|
|
|
|
// one positive tag (a common case), do an optimised search
|
|
else if($positive_tag_count === 1 && $negative_tag_count === 0) {
|
|
$query = new Querylet(
|
|
// MySQL is braindead, and does a full table scan on images, running the subquery once for each row -_-
|
|
// "{$this->get_images} WHERE images.id IN (SELECT image_id FROM tags WHERE tag LIKE ?) ",
|
|
"
|
|
SELECT images.*, UNIX_TIMESTAMP(posted) AS posted_timestamp
|
|
FROM tags, image_tags, images
|
|
WHERE
|
|
tag LIKE :tag0
|
|
AND tags.id = image_tags.tag_id
|
|
AND image_tags.image_id = images.id
|
|
",
|
|
$tag_search->variables);
|
|
|
|
if(!empty($img_search->sql)) {
|
|
$query->append_sql(" AND ");
|
|
$query->append($img_search);
|
|
}
|
|
}
|
|
|
|
// more than one positive tag, or more than zero negative tags
|
|
else {
|
|
$s_tag_array = array_map("sql_escape", $tag_search->variables);
|
|
$s_tag_list = join(', ', $s_tag_array);
|
|
|
|
$tag_id_array = array();
|
|
$tags_ok = true;
|
|
foreach($tag_search->variables as $tag) {
|
|
$tag_ids = $database->get_col("SELECT id FROM tags WHERE tag LIKE :tag", array("tag"=>$tag));
|
|
$tag_id_array = array_merge($tag_id_array, $tag_ids);
|
|
$tags_ok = count($tag_ids) > 0;
|
|
if(!$tags_ok) break;
|
|
}
|
|
if($tags_ok) {
|
|
$tag_id_list = join(', ', $tag_id_array);
|
|
|
|
$subquery = new Querylet('
|
|
SELECT images.*, SUM('.$tag_search->sql.') AS score
|
|
FROM images
|
|
LEFT JOIN image_tags ON image_tags.image_id = images.id
|
|
JOIN tags ON image_tags.tag_id = tags.id
|
|
WHERE tags.id IN ('.$tag_id_list.')
|
|
GROUP BY images.id
|
|
HAVING score = :score',
|
|
array_merge(
|
|
$tag_search->variables,
|
|
array("score"=>$positive_tag_count)
|
|
)
|
|
);
|
|
$query = new Querylet('
|
|
SELECT *, UNIX_TIMESTAMP(posted) AS posted_timestamp
|
|
FROM ('.$subquery->sql.') AS images ', $subquery->variables);
|
|
|
|
if(!empty($img_search->sql)) {
|
|
$query->append_sql(" WHERE ");
|
|
$query->append($img_search);
|
|
}
|
|
}
|
|
else {
|
|
# there are no results, "where 1=0" should shortcut things
|
|
$query = new Querylet("
|
|
SELECT images.*
|
|
FROM images
|
|
WHERE 1=0
|
|
");
|
|
}
|
|
}
|
|
|
|
$tag_n = 0;
|
|
return $query;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A class for organising the tag related functions.
|
|
*
|
|
* All the methods are static, one should never actually use a tag object.
|
|
*/
|
|
class Tag {
|
|
/**
|
|
* Remove any excess fluff from a user-input tag
|
|
*/
|
|
public static function sanitise($tag) {
|
|
assert(is_string($tag));
|
|
$tag = preg_replace("/[\s?*]/", "", $tag);
|
|
$tag = preg_replace("/\.+/", ".", $tag);
|
|
$tag = preg_replace("/^(\.+[\/\\\\])+/", "", $tag);
|
|
return $tag;
|
|
}
|
|
|
|
/**
|
|
* Turn any string or array into a valid tag array
|
|
*/
|
|
public static function explode($tags) {
|
|
assert(is_string($tags) || is_array($tags));
|
|
|
|
if(is_string($tags)) {
|
|
$tags = explode(' ', $tags);
|
|
}
|
|
//else if(is_array($tags)) {
|
|
// do nothing
|
|
//}
|
|
|
|
$tag_array = array();
|
|
foreach($tags as $tag) {
|
|
$tag = trim($tag, ", \t\n\r\0\x0B");
|
|
if(is_string($tag) && !empty($tag)) {
|
|
$tag_array[] = $tag;
|
|
}
|
|
}
|
|
|
|
if(count($tag_array) == 0) {
|
|
$tag_array = array("tagme");
|
|
}
|
|
|
|
sort($tag_array);
|
|
|
|
return $tag_array;
|
|
}
|
|
|
|
public static function implode($tags) {
|
|
assert(is_string($tags) || is_array($tags));
|
|
|
|
if(is_array($tags)) {
|
|
sort($tags);
|
|
$tags = implode(' ', $tags);
|
|
}
|
|
//else if(is_string($tags)) {
|
|
// do nothing
|
|
//}
|
|
|
|
return $tags;
|
|
}
|
|
|
|
public static function resolve_alias($tag) {
|
|
assert(is_string($tag));
|
|
|
|
global $database;
|
|
$newtag = $database->get_one(
|
|
$database->scoreql_to_sql("SELECT newtag FROM aliases WHERE SCORE_STRNORM(oldtag)=SCORE_STRNORM(:tag)"),
|
|
array("tag"=>$tag));
|
|
if(!empty($newtag)) {
|
|
return $newtag;
|
|
} else {
|
|
return $tag;
|
|
}
|
|
}
|
|
|
|
public static function resolve_wildcard($tag) {
|
|
// if there is no wildcard, return the tag
|
|
if(strpos($tag, "*") === false) {
|
|
return array($tag);
|
|
}
|
|
|
|
// if the whole match is wild, return null to save the database
|
|
else if(str_replace("*", "", $tag) == "") {
|
|
return array();
|
|
}
|
|
|
|
// else find some matches
|
|
else {
|
|
global $database;
|
|
$db_wild_tag = str_replace("%", "\%", $tag);
|
|
$db_wild_tag = str_replace("*", "%", $tag);
|
|
$newtags = $database->get_col($database->scoreql_to_sql("SELECT tag FROM tags WHERE SCORE_STRNORM(tag) LIKE SCORE_STRNORM(?)"), array($db_wild_tag));
|
|
if(count($newtags) > 0) {
|
|
$resolved = $newtags;
|
|
} else {
|
|
$resolved = array($tag);
|
|
}
|
|
return $resolved;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This function takes a list (array) of tags and changes any tags that have aliases
|
|
*
|
|
* @param $tags Array of tags
|
|
* @return Array of tags
|
|
*/
|
|
public static function resolve_list($tags) {
|
|
$tags = Tag::explode($tags);
|
|
reset($tags); // rewind array to the first element.
|
|
$new = array();
|
|
foreach($tags as $tag) {
|
|
$new_set = explode(' ', Tag::resolve_alias($tag));
|
|
foreach($new_set as $new_one) {
|
|
$new[] = $new_one;
|
|
}
|
|
}
|
|
$new = array_map(array('Tag', 'sanitise'), $new);
|
|
$new = array_iunique($new); // remove any duplicate tags
|
|
return $new;
|
|
}
|
|
}
|
|
|
|
|
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
|
|
* Misc functions *
|
|
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
|
|
|
/**
|
|
* Move a file from PHP's temporary area into shimmie's image storage
|
|
* heirachy, or throw an exception trying
|
|
*/
|
|
function move_upload_to_archive(DataUploadEvent $event) {
|
|
$target = warehouse_path("images", $event->hash);
|
|
if(!@copy($event->tmpname, $target)) {
|
|
$errors = error_get_last(); // note: requires php 5.2
|
|
throw new UploadException("Failed to copy file from uploads ({$event->tmpname}) to archive ($target): {$errors['type']} / {$errors['message']}");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Given a full size pair of dimentions, return a pair scaled down to fit
|
|
* into the configured thumbnail square, with ratio intact
|
|
*/
|
|
function get_thumbnail_size(/*int*/ $orig_width, /*int*/ $orig_height) {
|
|
global $config;
|
|
|
|
if($orig_width == 0) $orig_width = 192;
|
|
if($orig_height == 0) $orig_height = 192;
|
|
|
|
if($orig_width > $orig_height * 5) $orig_width = $orig_height * 5;
|
|
if($orig_height > $orig_width * 5) $orig_height = $orig_width * 5;
|
|
|
|
$max_width = $config->get_int('thumb_width');
|
|
$max_height = $config->get_int('thumb_height');
|
|
|
|
$xscale = ($max_height / $orig_height);
|
|
$yscale = ($max_width / $orig_width);
|
|
$scale = ($xscale < $yscale) ? $xscale : $yscale;
|
|
|
|
if($scale > 1 && $config->get_bool('thumb_upscale')) {
|
|
return array((int)$orig_width, (int)$orig_height);
|
|
}
|
|
else {
|
|
return array((int)($orig_width*$scale), (int)($orig_height*$scale));
|
|
}
|
|
}
|
|
|
|
?>
|