add problem reset link to staff debug page

lms/templates/courseware/instructor_dashboard.html

@@ -592,7 +592,7 @@ function goto( mode)
 ##-----------------------------------------------------------------------------
 
 %if msg:
-    <p></p><p>${msg}</p>
+    <p></p><p id="idash_msg">${msg}</p>
 %endif
 
 ##-----------------------------------------------------------------------------

lms/templates/staff_problem_info.html

@@ -52,6 +52,70 @@ ${block_content}
     <header>
       <h2>${_('Staff Debug')}</h2>
     </header>
+
+<script type="text/javascript">
+var StaffDebug = (function(){
+
+  geturl = function(action){
+    var pathname = window.location.pathname;
+    var url = pathname.substr(0,pathname.indexOf('/courseware')) + '/' + action;
+    return url;
+  }
+
+  get_user = function(locname){
+    var uname = $('#sd_fu_' + locname).val();
+    if (uname==""){
+        uname = "${user.username}";
+    }
+    return uname;
+  }
+
+  do_idash_action = function(locname, idaction){
+    var pdata = {'csrfmiddlewaretoken': "${csrf_token}",
+                 'action': idaction,
+                 'problem_for_student': locname,
+                 'unique_student_identifier': get_user(locname)
+                 }
+    $.ajax({
+        type: "POST",
+        url: geturl('instructor'),
+        data: pdata,
+        success: function(data){
+            var msg = $("#idash_msg", data);
+            $( "#result_"+locname ).html( msg );
+        },
+        dataType: 'html'
+    });
+  }
+
+  reset = function(locname){
+    do_idash_action(locname, "Reset student's attempts");
+  }
+
+  sdelete = function(locname){
+    do_idash_action(locname, "Delete student state for module");
+  }
+
+  reload = function(locname){
+    var url = geturl('jump_to_id/' + locname);
+    window.location.replace(url);
+  }
+
+  return {reset: reset,
+          reload: reload,
+          sdelete: sdelete,
+          do_idash_action: do_idash_action
+          }
+})();
+</script>
+
+    [ <a href='javascript:StaffDebug.reset("${location.name}")'>${_('Reset Attempts')}</a> |
+      <a href='javascript:StaffDebug.reload("${location.name}")'>${_('Reload Page')}</a> |
+      <a href='javascript:StaffDebug.sdelete("${location.name}")'>${_('Delete State')}</a>
+    ]
+    <span style="float:right">For user:<input type="text" id="sd_fu_${location.name}" /></span>
+    <div id="result_${location.name}"/>
+
     <div class="staff_info" style="display:block">
 is_released = ${is_released}
 location = ${location | h}