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24 * RateIt: A recommender system, based on MovieLens and "suggest".
25 * Store user ratings per pagename. The wikilens theme displays a navbar image bar
26 * with some nice javascript magic and this plugin shows various recommendations.
28 * There should be two methods to store ratings:
29 * In a SQL database as in wikilens http://dickens.cs.umn.edu/dfrankow/wikilens
31 * The most important fact: A page has more than one rating. There can
32 * be (and will be!) many ratings per page (ratee): different raters
33 * (users), in different dimensions. Are those stored per page
34 * (ratee)? Then what if I wish to access the ratings per rater
36 * wikilens plans several user-centered applications like:
38 * b) show my buddies' ratings
39 * c) show how my ratings are like my buddies'
40 * d) show where I agree/disagree with my buddy
41 * e) show what this group of people agree/disagree on
43 * If the ratings are stored in a real DB in a table, we can index the
44 * ratings by rater and ratee, and be confident in
45 * performance. Currently MovieLens has 80,000 users, 7,000 items,
46 * 10,000,000 ratings. This is an average of 1400 ratings/page if each
47 * page were rated equally. However, they're not: the most popular
48 * things have tens of thousands of ratings (e.g., "Pulp Fiction" has
49 * 42,000 ratings). If ratings are stored per page, you would have to
50 * save/read huge page metadata every time someone submits a
51 * rating. Finally, the movie domain has an unusually small number of
52 * items-- I'd expect a lot more in music, for example.
54 * For a simple rating system one can also store the rating in the page
57 * Recommender Engines:
58 * Recommendation/Prediction is a special field of "Data Mining"
59 * For a list of (also free) software see
60 * http://www.the-data-mine.com/bin/view/Software/WebIndex
61 * - movielens: (Java Server) will be gpl'd in summer 2004 (weighted)
62 * - suggest: is free for non-commercial use, available as compiled library
64 * - Autoclass: simple public domain C library
65 * - MLC++: C++ library http://www.sgi.com/tech/mlc/
67 * Usage: <<RateIt >> just the widget without text
68 * Note: The wikilens theme or any derivate must be enabled, to enable this plugin!
69 * <<RateIt show=top >> text plus widget below
70 * <<RateIt show=ratings >> to show my ratings
71 * TODO: <<RateIt show=buddies >> to show my buddies
72 * <<RateIt show=ratings dimension=1 >>
73 * TODO: <<RateIt show=text >> just text, no widget, for dumps
75 * @author: Dan Frankowski (wikilens author), Reini Urban (as plugin)
78 * - finish mysuggest.c (external engine with data from mysql)
81 require_once 'lib/WikiPlugin.php';
82 require_once 'lib/wikilens/RatingsDb.php';
84 class WikiPlugin_RateIt
90 function getDescription()
92 return _("Rating system. Store user ratings per page.");
95 function RatingWidgetJavascript()
98 if (!empty($this->imgPrefix))
99 $imgPrefix = $this->imgPrefix;
100 elseif (defined("RATEIT_IMGPREFIX"))
101 $imgPrefix = RATEIT_IMGPREFIX; else $imgPrefix = '';
102 if ($imgPrefix and !$WikiTheme->_findData("images/RateIt" . $imgPrefix . "Nk0.png", 1))
104 $img = substr($WikiTheme->_findData("images/RateIt" . $imgPrefix . "Nk0.png"), 0, -7);
105 $urlprefix = WikiURL("", 0, 1); // TODO: check actions USE_PATH_INFO=false
106 $js_globals = "var rateit_imgsrc = '" . $img . "';
107 var rateit_action = '" . urlencode("RateIt") . "';
109 $WikiTheme->addMoreHeaders
111 array('src' => $WikiTheme->_findData('themes/wikilens/wikilens.js'))));
112 return JavaScript($js_globals);
115 function actionImgPath()
118 return $WikiTheme->_findFile("images/RateItAction.png", 1);
122 * Take a string and quote it sufficiently to be passed as a Javascript
125 private function _javascript_quote_string($s)
127 return str_replace("'", "\'", $s);
130 function getDefaultArguments()
132 return array('pagename' => '[pagename]',
135 'imgPrefix' => '', // '' or BStar or Star
136 'dimension' => false,
144 { // early side-effects (before body)
147 if (!empty($_already)) return;
149 $WikiTheme->addMoreHeaders(JavaScript(
150 "var prediction = new Array; var rating = new Array;
151 var avg = new Array; var numusers = new Array;
152 var canRate = new Array;
153 var msg_rating_votes = '" . _("Rating: %.1f (%d votes)") . "';
154 var msg_curr_rating = '" . _("Your current rating: ") . "';
155 var msg_curr_prediction = '" . _("Your current prediction: ") . "';
156 var msg_chg_rating = '" . _("Change your rating from ") . "';
157 var msg_to = '" . _(" to ") . "';
158 var msg_add_rating = '" . _("Add your rating: ") . "';
159 var msg_thanks = '" . _("Thanks!") . "';
160 var msg_rating_deleted = '" . _("Rating deleted!") . "';
162 $WikiTheme->addMoreHeaders($this->RatingWidgetJavascript());
165 function displayActionImg($mode)
167 global $WikiTheme, $request;
168 if (!empty($request->_is_buffering_output))
169 ob_end_clean(); // discard any previous output
171 $page = $request->getPage();
172 //$page->set('_cached_html', false);
173 $request->cacheControl('MUST-REVALIDATE');
174 $dbi = $request->getDbh();
176 //fake validators without args
177 $request->appendValidators(array('wikiname' => WIKI_NAME,
178 'args' => wikihash('')));
179 $request->discardOutput();
180 $actionImg = $WikiTheme->_path . $this->actionImgPath();
181 if (file_exists($actionImg)) {
182 header('Content-type: image/png');
183 readfile($actionImg);
185 header('Content-type: image/png');
186 echo base64_decode('iVBORw0KGgoAAAANSUhEUgAAAAIAAAACAQMAAABIeJ9nAAAAA1BMVEX///'
187 . '+nxBvIAAAAAXRSTlMAQObYZgAAABNJREFUeF4NwAEBAAAAgJD+r5YGAAQAAXHhfPAAAAAASUVORK5CYII=');
192 // Only for signed users done in template only yet.
193 function run($dbi, $argstr, &$request, $basepage)
196 //$this->_request = & $request;
197 //$this->_dbi = & $dbi;
198 $user = $request->getUser();
199 //FIXME: fails on test with DumpHtml:RateIt
200 if (!is_object($user)) {
201 return HTML::raw('');
203 $this->userid = $user->getId();
204 if (!$this->userid) {
205 return HTML::raw('');
207 $args = $this->getArgs($argstr, $request);
208 $this->dimension = $args['dimension'];
209 $this->imgPrefix = $args['imgPrefix'];
210 if ($this->dimension == '') {
211 $this->dimension = 0;
212 $args['dimension'] = 0;
214 if ($args['pagename']) {
215 // Expand relative page names.
216 $page = new WikiPageName($args['pagename'], $basepage);
217 $args['pagename'] = $page->name;
219 if (empty($args['pagename'])) {
220 return $this->error(_("no page specified"));
222 $this->pagename = $args['pagename'];
224 $rdbi = RatingsDb::getTheRatingsDb();
225 $this->_rdbi =& $rdbi;
227 if ($args['mode'] === 'add') {
228 //if (!$user->isSignedIn()) return $this->error(_("You must sign in"));
229 $this->rating = $request->getArg('rating');
230 $rdbi->addRating($this->rating, $this->userid, $this->pagename, $this->dimension);
231 $this->displayActionImg('add');
233 } elseif ($args['mode'] === 'delete') {
234 //if (!$user->isSignedIn()) return $this->error(_("You must sign in"));
235 $rdbi->deleteRating($this->userid, $this->pagename, $this->dimension);
236 unset($this->rating);
237 $this->displayActionImg('delete');
238 } elseif (!$args['show']) {
239 return $this->RatingWidgetHtml($args['pagename'], $args['version'], $args['imgPrefix'],
240 $args['dimension'], $args['small']);
242 //if (!$user->isSignedIn()) return $this->error(_("You must sign in"));
244 $this->rating = $rdbi->getRating($this->userid, $this->pagename, $this->dimension);
245 $this->avg = $rdbi->getAvg($this->pagename, $this->dimension);
246 $this->numusers = $rdbi->getNumUsers($this->pagename, $this->dimension);
247 // Update this text on rateit in javascript. needed: NumUsers, Avg
250 HTML::span(array('class' => 'rateit'),
251 sprintf(_("Rating: %.1f (%d votes)"),
252 $this->avg, $this->numusers)));
253 if ($args['show'] == 'top') {
254 if (ENABLE_PAGE_PUBLIC) {
255 $page = $dbi->getPage($this->pagename);
256 if ($page->get('public'))
257 $html->setAttr('class', "public");
259 $html->setAttr('id', "rateit-widget-top");
260 $html->pushContent(HTML::br(),
261 $this->RatingWidgetHtml($args['pagename'], $args['version'],
263 $args['dimension'], $args['small']));
264 } elseif ($args['show'] == 'text') {
265 if (!$WikiTheme->DUMP_MODE)
266 $html->pushContent(HTML::br(),
267 sprintf(_("Your rating was %.1f"),
269 } elseif ($this->rating) {
270 $html->pushContent(HTML::br(),
271 sprintf(_("Your rating was %.1f"),
274 $this->pred = $rdbi->getPrediction($this->userid, $this->pagename, $this->dimension);
275 if (is_string($this->pred))
276 $html->pushContent(HTML::br(),
277 sprintf(_("Prediction: %s"),
280 $html->pushContent(HTML::br(),
281 sprintf(_("Prediction: %.1f"),
289 // box is used to display a fixed-width, narrow version with common header
290 function box($args = false, $request = false, $basepage = false)
292 if (!$request) $request =& $GLOBALS['request'];
293 if (!$request->_user->isSignedIn()) {
296 if (!isset($args)) $args = array();
299 foreach ($args as $key => $value)
300 $argstr .= $key . "=" . $value;
301 $widget = $this->run($request->_dbi, $argstr, $request, $basepage);
303 return $this->makeBox(WikiLink(_("RateIt"), '', _("Rate It")),
308 * HTML widget display
310 * This needs to be put in the <body> section of the page.
312 * @param pagename Name of the page to rate
313 * @param version Version of the page to rate (may be "" for current)
314 * @param imgPrefix Prefix of the names of the images that display the rating
315 * You can have two widgets for the same page displayed at
316 * once iff the imgPrefix-s are different.
317 * @param dimension Id of the dimension to rate
318 * @param small Makes a smaller ratings widget if non-false
320 * Limitations: Currently this can only print the current users ratings.
321 * And only the widget, but no value (for buddies) also.
323 function RatingWidgetHtml($pagename, $version, $imgPrefix, $dimension, $small = false)
325 global $WikiTheme, $request;
327 $dbi =& $request->_dbi;
328 $version = $dbi->_backend->get_latest_version($pagename);
329 $pageid = sprintf("%u", crc32($pagename)); // MangleXmlIdentifier($pagename)
330 $imgId = 'RateIt' . $pageid;
331 $actionImgName = 'RateIt' . $pageid . 'Action';
333 //$rdbi =& $this->_rdbi;
334 $rdbi = RatingsDb::getTheRatingsDb();
336 // check if the imgPrefix icons exist.
337 if (!$WikiTheme->_findData("images/RateIt" . $imgPrefix . "Nk0.png", true))
340 // Protect against \'s, though not \r or \n
341 $reImgPrefix = $this->_javascript_quote_string($imgPrefix);
342 $reImgId = $this->_javascript_quote_string($imgId);
343 $reActionImgName = $this->_javascript_quote_string($actionImgName);
344 $rePagename = $this->_javascript_quote_string($pagename);
345 //$dimension = $args['pagename'] . "rat";
347 $html = HTML::span(array("class" => "rateit-widget", "id" => $imgId));
348 for ($i = 0; $i < 2; $i++) {
349 $ok[$i] = $WikiTheme->_findData("images/RateIt" . $imgPrefix . "Ok" . $i . ".png"); // empty
350 $nk[$i] = $WikiTheme->_findData("images/RateIt" . $imgPrefix . "Nk" . $i . ".png"); // rated
351 $rk[$i] = $WikiTheme->_findData("images/RateIt" . $imgPrefix . "Rk" . $i . ".png"); // pred
354 if (empty($this->userid)) {
355 $user = $request->getUser();
356 $this->userid = $user->getId();
358 if (empty($this->rating)) {
359 $this->rating = $rdbi->getRating($this->userid, $pagename, $dimension);
360 if (!$this->rating and empty($this->pred)) {
361 $this->pred = $rdbi->getPrediction($this->userid, $pagename, $dimension);
365 for ($i = 1; $i <= 10; $i++) {
367 $a1 = HTML::a(array('href' => "javascript:clickRating('$reImgPrefix','$rePagename','$version',"
368 . "'$reImgId','$dimension',$j)"));
370 $img_attr['src'] = $nk[$i % 2];
372 $img_attr['src'] = $ok[$i % 2];
373 $img_attr['onmouseover'] = "displayRating('$reImgId','$reImgPrefix',$j,0,1)";
374 $img_attr['onmouseout'] = "displayRating('$reImgId','$reImgPrefix',$this->rating,0,1)";
375 } else if (!$this->rating and $this->pred) {
376 $img_attr['src'] = $rk[$i % 2];
377 $img_attr['onmouseover'] = "displayRating('$reImgId','$reImgPrefix',$j,1,1)";
378 $img_attr['onmouseout'] = "displayRating('$reImgId','$reImgPrefix',$this->pred,1,1)";
380 $img_attr['onmouseover'] = "displayRating('$reImgId','$reImgPrefix',$j,0,1)";
381 $img_attr['onmouseout'] = "displayRating('$reImgId','$reImgPrefix',0,0,1)";
383 //$imgName = 'RateIt'.$reImgId.$i;
384 $img_attr['id'] = $imgId . $i;
385 $img_attr['alt'] = $img_attr['id'];
386 $a1->pushContent(HTML::img($img_attr));
387 //$a1->addToolTip(_("Rate the topic of this page"));
388 $html->pushContent($a1);
390 //This adds a space between the rating smilies:
391 //if (($i%2) == 0) $html->pushContent("\n");
393 $html->pushContent(HTML::raw(" "));
395 $a0 = HTML::a(array('href' => "javascript:clickRating('$reImgPrefix','$rePagename','$version',"
396 . "'$reImgId','$dimension','X')"));
397 $msg = _("Cancel your rating");
398 $imgprops = array('src' => $WikiTheme->getImageUrl("RateIt" . $imgPrefix . "Cancel"),
399 'id' => $imgId . $imgPrefix . 'Cancel',
403 $imgprops['style'] = 'display:none';
404 $a0->pushContent(HTML::img($imgprops));
405 $a0->addToolTip($msg);
406 $html->pushContent($a0);
409 $msg = _("No opinion");
410 $html->pushContent(HTML::img(array('src' => $WikiTheme->getImageUrl("RateItCancelN"),
411 'id' => $imgPrefix.'Cancel',
413 //$a0->addToolTip($msg);
414 //$html->pushContent($a0);
417 $img_attr['src'] = $WikiTheme->_findData("images/spacer.png");
418 $img_attr['id'] = $actionImgName;
419 $img_attr['alt'] = $img_attr['id'];
420 $img_attr['height'] = 15;
421 $img_attr['width'] = 20;
422 $html->pushContent(HTML::img($img_attr));
424 // Display your current rating if there is one, or the current prediction
425 // or the empty widget.
426 $pred = empty($this->pred) ? 0 : $this->pred;
428 if (!empty($this->avg))
429 $js .= "avg['$reImgId']=$this->avg; numusers['$reImgId']=$this->numusers;\n";
431 $js .= "rating['$reImgId']=$this->rating; prediction['$reImgId']=$pred;\n";
432 $html->pushContent(JavaScript($js
433 . "displayRating('$reImgId','$reImgPrefix',$this->rating,0,1);"));
434 } elseif (!empty($this->pred)) {
435 $js .= "rating['$reImgId']=0; prediction['$reImgId']=$this->pred;\n";
436 $html->pushContent(JavaScript($js
437 . "displayRating('$reImgId','$reImgPrefix',$this->pred,1,1);"));
439 $js .= "rating['$reImgId']=0; prediction['$reImgId']=0;\n";
440 $html->pushContent(JavaScript($js
441 . "displayRating('$reImgId','$reImgPrefix',0,0,1);"));
452 // c-hanging-comment-ender-p: nil
453 // indent-tabs-mode: nil