New Feature: save searches (and display a searchhistory box)

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@80 b3834d28-1941-0410-a4f8-b48e95affb8f

1 files changed, 108 insertions, 0 deletions

diff --git a/services/searchhistoryservice.php b/services/searchhistoryservice.php
new file mode 100644
index 0000000..7389906
--- /dev/null
+++ b/services/searchhistoryservice.php
@@ -0,0 +1,108 @@
+<?php
+class SearchHistoryService {
+    var $db;
+    var $tablename;
+    var $sizeSearchHistory;
+
+    function &getInstance(&$db) {
+        static $instance;
+        if (!isset($instance))
+            $instance =& new SearchHistoryService($db);
+        return $instance;
+    }
+
+    function SearchHistoryService(& $db) {
+        $this->db =& $db;
+        $this->tablename = $GLOBALS['tableprefix'] .'searchhistory';
+	if(isset($GLOBALS['sizeSearchHistory'])) {
+            $this->sizeSearchHistory = $GLOBALS['sizeSearchHistory'];
+	} else {
+	    $this->sizeSearchHistory = 10;
+	}
+    }
+
+    function addSearch($terms, $range, $nbResults, $uId=0) {
+	if(strlen($terms) == 0) {
+	    return false;
+	}
+        $datetime = gmdate('Y-m-d H:i:s', time());
+
+	//Insert values
+	$values = array('shTerms'=>$terms, 'shRange'=>$range, 'shDatetime'=>$datetime, 'shNbResults'=>$nbResults, 'uId'=>$uId);
+	$sql = 'INSERT INTO '. $this->getTableName() .' '. $this->db->sql_build_array('INSERT', $values);
+        $this->db->sql_transaction('begin');
+        if (!($dbresult = & $this->db->sql_query($sql))) {
+            $this->db->sql_transaction('rollback');
+            message_die(GENERAL_ERROR, 'Could not insert search history', '', __LINE__, __FILE__, $sql, $this->db);
+            return false;
+        }
+
+	if($this->sizeSearchHistory != -1 && 
+		$this->countSearches() > $this->sizeSearchHistory) {
+	    $this->deleteOldestSearch();
+	}
+    }
+
+    function getAllSearches($range = NULL, $uId = NULL, $nb = NULL, $start = NULL, $distinct = false) {
+	$sql = 'SELECT DISTINCT(shTerms), shId, shRange, shNbResults, shDatetime, uId';
+	$sql.= ' FROM '. $this->getTableName();
+	$sql.= ' WHERE 1=1';
+	if($range != NULL) {
+	    $sql.= ' AND shRange = "'.$range.'"';
+	} else {
+	    $sql.= ' AND shRange = "all"';
+	}
+	if($uId != NULL) {
+	    $sql.= ' AND uId = '.$uId;
+	}
+	if($distinct) {
+	    $sql.= ' GROUP BY shTerms';
+	}
+	$sql.= ' ORDER BY shId DESC';
+
+        if (!($dbresult = & $this->db->sql_query_limit($sql, $nb, $start))) {
+            message_die(GENERAL_ERROR, 'Could not get searches', '', __LINE__, __FILE__, $sql, $this->db);
+            return false;
+        }
+
+        $searches = array();
+        while ($row = & $this->db->sql_fetchrow($dbresult)) {
+            $searches[] = $row;
+        }
+        return $searches;
+    }
+
+    function countSearches() {
+	$sql = 'SELECT COUNT(*) AS `total` FROM '. $this->getTableName();
+        if (!($result = & $this->db->sql_query($sql)) || (!($row = & $this->db->sql_fetchrow($result)))) {
+            message_die(GENERAL_ERROR, 'Could not get total searches', '', __LINE__, __FILE__, $sql, $this->db);
+            return false;
+        }
+
+	return $row['total'];
+    }
+
+    /* This function allows to limit the number of saved searches
+       by deleting the oldest one */
+    function deleteOldestSearch() {
+	$sql = 'DELETE FROM '.$this->getTableName();
+	$sql.= ' ORDER BY shId ASC LIMIT 1';  // warning: here the limit is important
+
+        $this->db->sql_transaction('begin');
+        if (!($dbresult = & $this->db->sql_query($sql))) {
+            $this->db->sql_transaction('rollback');
+            message_die(GENERAL_ERROR, 'Could not delete bookmarks', '', __LINE__, __FILE__, $query, $this->db);
+            return false;
+        }
+    }
+
+    function deleteAll() {
+	$query = 'TRUNCATE TABLE `'. $this->getTableName() .'`';
+	$this->db->sql_query($query);
+    }   
+
+    // Properties
+    function getTableName()       { return $this->tablename; }
+    function setTableName($value) { $this->tablename = $value; }
+}
+?>