diff -r ceb381f5b0c7 -r e7086d345a7c hdalab/filter.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hdalab/filter.php	Tue Jan 17 00:19:27 2012 +0100
@@ -0,0 +1,154 @@
+<?php
+header('Content-type: application/json');
+
+require('connect.inc.php');
+
+$periode = (isset($_REQUEST['period']) ? pg_escape_string($_REQUEST['period']) : NULL);
+$label = (isset($_REQUEST['label']) ? pg_escape_string($_REQUEST['label']) : NULL);
+$contentlist = (isset($_REQUEST['contentlist']) ? pg_escape_string($_REQUEST['contentlist']) : NULL);
+$max_tag_order = (isset($_REQUEST['mto']) ? pg_escape_string($_REQUEST['mto']) : 12);
+$content_count = (isset($_REQUEST['contentcount']) ? pg_escape_string($_REQUEST['contentcount']) : 12);
+$tag_count = (isset($_REQUEST['tagcount']) ? pg_escape_string($_REQUEST['tagcount']) : 30);
+$cont_count = 0;
+
+if ($label || $periode || $contentlist) {
+    $globalsql = "SELECT id, title, description, url FROM hdabo_datasheet E";
+    $globalids = array();
+    $globalfilters = array();
+    if ($periode) {
+        $years = split(',',$periode);
+        $start_year = $years[0];
+        $end_year = (count($years) > 1 ? $years[1] : $start_year);
+        $delta = max( 1, floor( ($end_year - $start_year ) / 2 ) );
+        $minstart = $start_year - $delta;
+        $maxend = $end_year + $delta;
+        $rq = pg_query("SELECT tag_id FROM hdaviz_years WHERE end_year >= $start_year AND start_year <= $end_year AND end_year <= $maxend AND start_year >= $minstart");
+        $ids = array();
+        while($ligne = pg_fetch_row($rq)) {
+            $ids[] = $ligne[0];
+        }
+        pg_free_result($rq);
+        $globalids = $ids;
+        $globalfilters[] = "EXISTS (SELECT * FROM hdabo_taggedsheet F WHERE F.tag_id IN (" . join(",", $ids) . ") AND F.order <= $max_tag_order AND F.datasheet_id = E.id)";
+    }
+    if ($label) {
+        $lblist = split(',',$label);
+        foreach ($lblist as $txtlbl) {
+            $rq = pg_query("SELECT id FROM hdabo_tag WHERE label ILIKE '$txtlbl'");
+            $ids = array();
+            while($ligne = pg_fetch_row($rq)) {
+                $ids[] = $ligne[0];
+            }
+            pg_free_result($rq);
+            $globalids = array_merge($globalids,$ids);
+            $globalfilters[] = "EXISTS (SELECT * FROM hdabo_taggedsheet G WHERE G.tag_id IN (" . join(",", $ids) . ") AND G.order <= $max_tag_order AND G.datasheet_id = E.id)";
+        }
+    }
+    if ($contentlist) {
+        $globalfilters[] = "id IN ($contentlist)";
+    }
+    $globalsql = $globalsql.(count($globalfilters) ? " WHERE ".join($globalfilters," AND ") : "" );
+    if (!$label && !$periode && !$contentlist) {
+        $globalsql = $globalsql." ORDER BY RANDOM()";
+    }
+    $rq = pg_query($globalsql);
+    $contenus = array();
+    while($ligne = pg_fetch_assoc($rq)) {
+        $cont_count++;
+        $ligne["score"] = 0;
+        $ligne["tags"] = array();
+        $contenus[$ligne["id"]] = $ligne;
+    }
+    pg_free_result($rq);
+    $rq = pg_query("SELECT label, isocode FROM hdaviz_cc");
+    $countries = array();
+    while($ligne = pg_fetch_row($rq)) {
+        $countries[$ligne[0]] = array("isocode" => $ligne[1], "score" => 0);
+    }
+    pg_free_result($rq);
+    $tags = array();
+    $contentids = join(",",array_keys($contenus));
+    $rq = pg_query("SELECT L.datasheet_id, L.tag_id, M.label, L.order FROM hdabo_taggedsheet L, hdabo_tag M WHERE L.datasheet_id IN ($contentids) AND L.tag_id = M.id AND L.order <= $max_tag_order ORDER BY L.order ASC");
+    while($ligne = pg_fetch_row($rq)) {
+        $match_tag = in_array($ligne[1], $globalids);
+        $contenus[$ligne[0]]["tags"][] = array("id" => $ligne[1], "label" => $ligne[2], "order" => $ligne[3], "match" => $match_tag);
+        $tagscore = 2*$max_tag_order-$ligne[3];
+        if (!isset($tags[$ligne[1]])) {
+            $tags[$ligne[1]] = array("id" => $ligne[1], "label" => $ligne[2], "score" => 0);
+        }
+        $tags[$ligne[1]]["score"] += $tagscore;
+        if ($match_tag) {
+            $contenus[$ligne[0]]["score"] += $tagscore;
+            $tags[$ligne[1]]["match"] = True;
+        }
+        if (isset($countries[$ligne[2]])) {
+            $countries[$ligne[2]]["score"] += $tagscore;
+        }
+    }
+    pg_free_result($rq);
+    function triscore($a, $b) {
+        return $b["score"] - $a["score"];
+    }
+    if (!$contentlist) {
+        usort($contenus,"triscore");
+        $contenus = array_slice($contenus, 0, $content_count);
+    } else {
+        $contenus = array_values($contenus);
+    }
+    usort($tags,"triscore");
+    $countries = array_values($countries);
+    $tags = array_slice($tags, 0, $tag_count);
+    $rq = pg_query("SELECT U.start_year, U.end_year, SUM(".(2*$max_tag_order)." - V.order)/(U.end_year + 1 - U.start_year) score FROM hdaviz_years U, hdabo_taggedsheet V WHERE U.tag_id = V.tag_id AND V.order <= $max_tag_order AND V.datasheet_id IN ($contentids) GROUP BY U.start_year, U.end_year");
+    $years = array();
+    while($ligne = pg_fetch_row($rq)) {
+        foreach(range($ligne[0], $ligne[1]) as $year) {
+            $years[$year] = $ligne[2] + ( isset($years[$year]) ? $years[$year] : 0 );
+        }
+    }
+    pg_free_result($rq);
+} else {
+    $rq = pg_query("SELECT id, title, description, url FROM hdabo_datasheet ORDER BY RANDOM() LIMIT $content_count");
+    while($ligne = pg_fetch_assoc($rq)) {
+        $ligne["tags"] = array();
+        $contenus[$ligne["id"]] = $ligne;
+    }
+    $rq = pg_query("SELECT COUNT(*) FROM hdabo_datasheet");
+    $ligne = pg_fetch_row($rq);
+    $cont_count = $ligne[0];
+    pg_free_result($rq);
+    $rq = pg_query("SELECT L.datasheet_id, L.tag_id, M.label, L.order FROM hdabo_taggedsheet L, hdabo_tag M WHERE L.datasheet_id IN (".join(",",array_keys($contenus)).") AND L.tag_id = M.id AND L.order <= $max_tag_order ORDER BY L.order ASC");
+    while($ligne = pg_fetch_row($rq)) {
+        $contenus[$ligne[0]]["tags"][] = array("id" => $ligne[1], "label" => $ligne[2], "order" => $ligne[3]);
+    }
+    pg_free_result($rq);
+    $contenus = array_values($contenus);
+    $rq = pg_query("SELECT hdabo_tag.id, label, SUM(".(2*$max_tag_order)." - hdabo_taggedsheet.order) score FROM hdabo_tag, hdabo_taggedsheet WHERE hdabo_tag.id = hdabo_taggedsheet.tag_id AND hdabo_taggedsheet.order <= $max_tag_order GROUP BY hdabo_tag.id, label ORDER BY score DESC LIMIT $tag_count");
+    $tags = pg_fetch_all($rq);
+    pg_free_result($rq);
+    $rq = pg_query("SELECT C.isocode, SUM(".(2*$max_tag_order)." - B.order) score FROM hdabo_tag A, hdabo_taggedsheet B, hdaviz_cc C WHERE A.id = B.tag_id AND B.order <= $max_tag_order AND A.label = C.label GROUP BY C.isocode");
+    $countries = pg_fetch_all($rq);
+    pg_free_result($rq);
+    $rq = pg_query("SELECT U.start_year, U.end_year, SUM(".(2*$max_tag_order)." - hdabo_taggedsheet.order)/(U.end_year + 1 - U.start_year) score FROM hdaviz_years U, hdabo_taggedsheet WHERE U.tag_id = hdabo_taggedsheet.tag_id AND hdabo_taggedsheet.order <= $max_tag_order GROUP BY U.start_year, U.end_year");
+    $years = array();
+    while($ligne = pg_fetch_row($rq)) {
+        foreach(range($ligne[0], $ligne[1]) as $year) {
+            $years[$year] = $ligne[2] + ( isset($years[$year]) ? $years[$year] : 0 );
+        }
+    }
+    pg_free_result($rq);
+}
+ksort($years);
+$yearchange = array();
+foreach($years as $year => $score) {
+    if ($year < 2011) {
+        if (!isset($years[$year-1]) || $years[$year-1] != $score) {
+            $yearchange[] = array('year' => $year, 'score' => $score);
+        }
+        if (!isset($years[$year+1]) && ($year != -1)) {
+            $yearchange[] = array('year' => $year + 1, 'score' => 0);
+        }
+    }
+}
+$output = array("count" => $cont_count, "contents" => $contenus, "tags" => $tags, "sparkline" => $yearchange, "countries" => $countries);
+echo json_encode($output);
+?>
\ No newline at end of file