merged: fixing warnings in stats lib - rather than doing an include_o…

…nce and noticing for every missing mod, check the file exists first from MOODLE_16_STABLE, and fixed up some weirdness in the reports

course/report/stats/graph.php

@@ -103,6 +103,16 @@
                 $times[$stat->timeend] = userdate($stat->timeend,get_string('strftimedate'),$CFG->timezone);
             }
         }
+        foreach (array_keys($times) as $t) {
+            foreach ($data as $roleid => $stuff) {
+                if (!array_key_exists($t, $stuff)) {
+                    $data[$roleid][$t] = 0;
+                }
+            }
+        }
+        foreach ($data as $role => $stuff) {
+            ksort($data[$role]);
+        }
         $nonzeroroleid = 0;
         foreach (array_keys($data) as $roleid) {
             if ($roleid == 0) {

course/report/stats/report.php

@@ -175,6 +175,13 @@
                             $rolesdata[$roleid] = 0;
                         }
                     }
+                    else {
+                        foreach (array_keys($roles) as $r) {
+                            if (!array_key_exists($r, $rolesdata)) {
+                                $rolesdata[$r] = 0;
+                            }
+                        }
+                    }
                     krsort($rolesdata); 
                     $row = array_merge(array($times[$time]),$rolesdata);
                     if (empty($CFG->loglifetime) || ($stat->timeend-(60*60*24)) >= (time()-60*60*24*$CFG->loglifetime)) {
@@ -197,4 +204,4 @@
         }
     }    
 
-?>
+?>