X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/a85740df875a17b21d94b777b4152e77dbae6e28..c63cb9e4a92378f9a630f95faa3d4d167e7aa8ec:/redakcja/static/edumed/js/edumed.js?ds=sidebyside

diff --git a/redakcja/static/edumed/js/edumed.js b/redakcja/static/edumed/js/edumed.js
index a48e19ac..f720aca1 100644
--- a/redakcja/static/edumed/js/edumed.js
+++ b/redakcja/static/edumed/js/edumed.js
@@ -1,7 +1,8 @@
+// Generated by CoffeeScript 1.4.0
 (function() {
-  var $, Binding, EduModule, Excercise, Luki, Przyporzadkuj, Uporzadkuj, Wybor, Zastap, excercise,
-    __hasProp = Object.prototype.hasOwnProperty,
-    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor; child.__super__ = parent.prototype; return child; };
+  var $, Binding, EduModule, Exercise, Luki, PrawdaFalsz, Przyporzadkuj, Uporzadkuj, Wybor, Zastap, exercise,
+    __hasProp = {}.hasOwnProperty,
+    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };
 
   $ = jQuery;
 
@@ -22,49 +23,62 @@
     __extends(EduModule, _super);
 
     function EduModule(element) {
-      var _this = this;
       EduModule.__super__.constructor.call(this, 'edumodule', element);
-      $("[name=teacher-toggle]").change(function(ev) {
-        if ($(ev.target).is(":checked")) {
-          return $(".teacher", _this.element).addClass("show");
-        } else {
-          return $(".teacher", _this.element).removeClass("show");
-        }
-      });
     }
 
     return EduModule;
 
   })(Binding);
 
-  Excercise = (function(_super) {
+  Exercise = (function(_super) {
 
-    __extends(Excercise, _super);
+    __extends(Exercise, _super);
 
-    function Excercise(element) {
+    function Exercise(element) {
       var _this = this;
-      Excercise.__super__.constructor.call(this, 'excercise', element);
-      $(".check", this.element).click(function() {
-        return _this.check();
+      Exercise.__super__.constructor.call(this, 'exercise', element);
+      $(this.element).data("exercise-html", $(this.element).html());
+      $(".check", this.element).click(function(ev) {
+        _this.check();
+        $(ev.target).next(".retry").show();
+        return $(ev.target).hide();
+      });
+      $(".retry", this.element).click(function(ev) {
+        return _this.retry();
       });
       $('.solutions', this.element).click(function() {
-        return _this.show_solutions();
+        _this.show_solutions();
+        return $(".comment", _this.element).show();
+      });
+      $('.reset', this.element).click(function() {
+        return _this.reset();
       });
     }
 
-    Excercise.prototype.piece_correct = function(qpiece) {
+    Exercise.prototype.retry = function() {
+      $(".correct, .incorrect", this.element).removeClass("correct incorrect");
+      $(".check", this.element).show();
+      return $(".retry", this.element).hide();
+    };
+
+    Exercise.prototype.reset = function() {
+      $(this.element).html($(this.element).data('exercise-html'));
+      return exercise(this.element);
+    };
+
+    Exercise.prototype.piece_correct = function(qpiece) {
       return $(qpiece).removeClass('incorrect').addClass('correct');
     };
 
-    Excercise.prototype.piece_incorrect = function(qpiece) {
+    Exercise.prototype.piece_incorrect = function(qpiece) {
       return $(qpiece).removeClass('correct').addClass('incorrect');
     };
 
-    Excercise.prototype.check = function() {
+    Exercise.prototype.check = function() {
       var score, scores,
         _this = this;
       scores = [];
-      $(".question").each(function(i, question) {
+      $(".question", this.element).each(function(i, question) {
         return scores.push(_this.check_question(question));
       });
       score = [0, 0];
@@ -75,17 +89,141 @@
       return this.show_score(score);
     };
 
-    Excercise.prototype.get_value_list = function(elem, data_key) {
-      return $(elem).data(data_key).split(',').map($.trim).map(function(x) {
-        return parseInt(x);
+    Exercise.prototype.show_solutions = function() {
+      var _this = this;
+      this.reset();
+      return $(".question", this.element).each(function(i, question) {
+        return _this.solve_question(question);
       });
     };
 
-    Excercise.prototype.show_score = function(score) {
-      return $(".message", this.element).text("Wynik: " + score[0] + " / " + score[1]);
+    Exercise.prototype.get_value_list = function(elem, data_key, numbers) {
+      var vl;
+      vl = $(elem).attr("data-" + data_key).split(/[ ,]+/).map($.trim);
+      if (numbers) {
+        vl = vl.map(function(x) {
+          return parseInt(x);
+        });
+      }
+      return vl;
+    };
+
+    Exercise.prototype.get_value_optional_list = function(elem, data_key) {
+      var mandat, opt, v, vals, _i, _len;
+      vals = this.get_value_list(elem, data_key);
+      mandat = [];
+      opt = [];
+      for (_i = 0, _len = vals.length; _i < _len; _i++) {
+        v = vals[_i];
+        if (v.slice(-1) === "?") {
+          opt.push(v.slice(0, -1));
+        } else {
+          mandat.push(v);
+        }
+      }
+      return [mandat, opt];
     };
 
-    return Excercise;
+    Exercise.prototype.show_score = function(score) {
+      var $msg;
+      $msg = $(".message", this.element);
+      $msg.text("Wynik: " + score[0] + " / " + score[1]);
+      if (score[0] === score[1]) {
+        return $msg.addClass("maxscore");
+      } else {
+        return $msg.removeClass("maxscore");
+      }
+    };
+
+    Exercise.prototype.draggable_equal = function($draggable1, $draggable2) {
+      return false;
+    };
+
+    Exercise.prototype.draggable_accept = function($draggable, $droppable) {
+      var d, dropped, _i, _len;
+      dropped = $droppable.closest("ul, ol").find(".draggable");
+      for (_i = 0, _len = dropped.length; _i < _len; _i++) {
+        d = dropped[_i];
+        if (this.draggable_equal($draggable, $(d))) {
+          return false;
+        }
+      }
+      return true;
+    };
+
+    Exercise.prototype.draggable_move = function($draggable, $placeholder, ismultiple) {
+      var $added,
+        _this = this;
+      $added = $draggable.clone();
+      $added.data("original", $draggable.get(0));
+      if (!ismultiple) {
+        $draggable.addClass('disabled').draggable('disable');
+      }
+      $placeholder.after($added);
+      if (!$placeholder.hasClass('multiple')) {
+        $placeholder.hide();
+      }
+      if ($added.is(".add-li")) {
+        $added.wrap("<li/>");
+      }
+      $added.append('<span class="remove">x</span><div class="clr"></div>');
+      return $('.remove', $added).click(function(ev) {
+        _this.retry();
+        if (!ismultiple) {
+          $($added.data('original')).removeClass('disabled').draggable('enable');
+        }
+        if ($added.is(".add-li")) {
+          $added = $added.closest('li');
+        }
+        $added.prev(".placeholder:not(.multiple)").show();
+        return $added.remove();
+      });
+    };
+
+    Exercise.prototype.dragging = function(ismultiple, issortable) {
+      var _this = this;
+      return $(".question", this.element).each(function(i, question) {
+        var draggable_opts, self;
+        draggable_opts = {
+          revert: 'invalid',
+          helper: 'clone',
+          start: _this.retry
+        };
+        $(".draggable", question).draggable(draggable_opts);
+        self = _this;
+        return $(".placeholder", question).droppable({
+          accept: function(draggable) {
+            var $draggable, is_accepted;
+            $draggable = $(draggable);
+            is_accepted = true;
+            if (!$draggable.is(".draggable")) {
+              is_accepted = false;
+            }
+            if (is_accepted) {
+              is_accepted = self.draggable_accept($draggable, $(this));
+            }
+            if (is_accepted) {
+              $(this).addClass('accepting');
+            } else {
+              $(this).removeClass('accepting');
+            }
+            return is_accepted;
+          },
+          drop: function(ev, ui) {
+            $(ev.target).removeClass('accepting dragover');
+            return _this.draggable_move($(ui.draggable), $(ev.target), ismultiple);
+          },
+          over: function(ev, ui) {
+            return $(ev.target).addClass('dragover');
+          },
+          out: function(ev, ui) {
+            return $(ev.target).removeClass('dragover');
+          }
+        });
+      });
+    };
+
+    return Exercise;
 
   })(Binding);
 
@@ -95,6 +233,7 @@
 
     function Wybor(element) {
       Wybor.__super__.constructor.call(this, element);
+      $(".question-piece input", element).change(this.retry);
     }
 
     Wybor.prototype.check_question = function(question) {
@@ -104,11 +243,18 @@
       good = 0;
       solution = this.get_value_list(question, 'solution');
       $(".question-piece", question).each(function(i, qpiece) {
-        var is_checked, piece_no, should_be_checked;
-        piece_no = parseInt($(qpiece).attr('data-no'));
-        should_be_checked = solution.indexOf(piece_no) >= 0;
+        var is_checked, piece_name, piece_no, should_be_checked;
+        piece_no = $(qpiece).attr('data-no');
+        piece_name = $(qpiece).attr('data-name');
+        if (piece_name) {
+          should_be_checked = solution.indexOf(piece_name) >= 0;
+        } else {
+          should_be_checked = solution.indexOf(piece_no) >= 0;
+        }
         is_checked = $("input", qpiece).is(":checked");
-        if (should_be_checked) all += 1;
+        if (should_be_checked) {
+          all += 1;
+        }
         if (is_checked) {
           if (should_be_checked) {
             good += 1;
@@ -123,11 +269,27 @@
       return [good, all];
     };
 
-    Wybor.prototype.show_solutions = function() {};
+    Wybor.prototype.solve_question = function(question) {
+      var solution,
+        _this = this;
+      solution = this.get_value_list(question, 'solution');
+      return $(".question-piece", question).each(function(i, qpiece) {
+        var piece_name, piece_no, should_be_checked;
+        piece_no = $(qpiece).attr('data-no');
+        piece_name = $(qpiece).attr('data-name');
+        if (piece_name) {
+          should_be_checked = solution.indexOf(piece_name) >= 0;
+        } else {
+          should_be_checked = solution.indexOf(piece_no) >= 0;
+        }
+        console.log("check " + $("input[type=checkbox]", qpiece).attr("id") + " -> " + should_be_checked);
+        return $("input[type=checkbox],input[type=radio]", qpiece).prop('checked', should_be_checked);
+      });
+    };
 
     return Wybor;
 
-  })(Excercise);
+  })(Exercise);
 
   Uporzadkuj = (function(_super) {
 
@@ -136,18 +298,19 @@
     function Uporzadkuj(element) {
       Uporzadkuj.__super__.constructor.call(this, element);
       $('ol, ul', this.element).sortable({
-        items: "> li"
+        items: "> li",
+        start: this.retry
       });
     }
 
     Uporzadkuj.prototype.check_question = function(question) {
-      var all, correct, pkt, pkts, positions, sorted, _ref;
-      positions = this.get_value_list(question, 'original');
+      var all, correct, pkt, pkts, positions, sorted, _i, _ref;
+      positions = this.get_value_list(question, 'original', true);
       sorted = positions.sort();
       pkts = $('.question-piece', question);
       correct = 0;
       all = 0;
-      for (pkt = 0, _ref = pkts.length; 0 <= _ref ? pkt < _ref : pkt > _ref; 0 <= _ref ? pkt++ : pkt--) {
+      for (pkt = _i = 0, _ref = pkts.length; 0 <= _ref ? _i < _ref : _i > _ref; pkt = 0 <= _ref ? ++_i : --_i) {
         all += 1;
         if (pkts.eq(pkt).data('pos') === sorted[pkt]) {
           correct += 1;
@@ -159,9 +322,35 @@
       return [correct, all];
     };
 
+    Uporzadkuj.prototype.solve_question = function(question) {
+      var p, parent, pkts, positions, sorted, _i, _len, _results;
+      positions = this.get_value_list(question, 'original', true);
+      sorted = positions.sort();
+      pkts = $('.question-piece', question);
+      pkts.sort(function(a, b) {
+        var q, w;
+        q = $(a).data('pos');
+        w = $(b).data('pos');
+        if (q < w) {
+          return 1;
+        }
+        if (q > w) {
+          return -1;
+        }
+        return 0;
+      });
+      parent = pkts.eq(0).parent();
+      _results = [];
+      for (_i = 0, _len = pkts.length; _i < _len; _i++) {
+        p = pkts[_i];
+        _results.push(parent.prepend(p));
+      }
+      return _results;
+    };
+
     return Uporzadkuj;
 
-  })(Excercise);
+  })(Exercise);
 
   Luki = (function(_super) {
 
@@ -169,6 +358,7 @@
 
     function Luki(element) {
       Luki.__super__.constructor.call(this, element);
+      this.dragging(false, false);
     }
 
     Luki.prototype.check = function() {
@@ -176,8 +366,10 @@
         _this = this;
       all = 0;
       correct = 0;
-      $(".question-piece", this.element).each(function(i, qpiece) {
-        if ($(qpiece).data('solution') === $(qpiece).val()) {
+      $(".placeholder + .question-piece", this.element).each(function(i, qpiece) {
+        var $placeholder;
+        $placeholder = $(qpiece).prev(".placeholder");
+        if ($placeholder.data('solution') === $(qpiece).data('no')) {
           _this.piece_correct(qpiece);
           correct += 1;
         } else {
@@ -188,9 +380,18 @@
       return this.show_score([correct, all]);
     };
 
+    Luki.prototype.solve_question = function(question) {
+      var _this = this;
+      return $(".placeholder", question).each(function(i, placeholder) {
+        var $qp;
+        $qp = $(".question-piece[data-no=" + $(placeholder).data('solution') + "]", question);
+        return _this.draggable_move($qp, $(placeholder), false);
+      });
+    };
+
     return Luki;
 
-  })(Excercise);
+  })(Exercise);
 
   Zastap = (function(_super) {
 
@@ -200,14 +401,9 @@
       var _this = this;
       Zastap.__super__.constructor.call(this, element);
       $(".paragraph", this.element).each(function(i, par) {
-        var spans;
-        _this.wrap_words($(par), $('<span class="zastap question-piece"/>'));
-        spans = $("> span", par).attr("contenteditable", "true");
-        return spans.click(function(ev) {
-          spans.filter(':not(:empty)').removeClass('editing');
-          return $(ev.target).addClass('editing');
-        });
+        return _this.wrap_words($(par), $('<span class="placeholder zastap"/>'));
       });
+      this.dragging(false, false);
     }
 
     Zastap.prototype.check = function() {
@@ -215,30 +411,38 @@
         _this = this;
       all = 0;
       correct = 0;
-      $(".question-piece", this.element).each(function(i, qpiece) {
-        var should_be_changed, txt;
-        txt = $(qpiece).data('original');
-        should_be_changed = false;
-        if (!(txt != null)) {
-          txt = $(qpiece).data('solution');
-          should_be_changed = true;
-        }
-        if (!(txt != null)) return;
-        if (should_be_changed) all += 1;
-        if (txt !== $(qpiece).text()) {
-          return _this.piece_incorrect(qpiece);
-        } else {
-          if (should_be_changed) {
-            _this.piece_correct(qpiece);
-            return correct += 1;
+      $(".paragraph", this.element).each(function(i, par) {
+        return $(".placeholder", par).each(function(j, qpiece) {
+          var $dragged, $qp;
+          $qp = $(qpiece);
+          $dragged = $qp.next(".draggable");
+          if ($qp.data("solution")) {
+            if ($dragged && $qp.data("solution") === $dragged.data("no")) {
+              _this.piece_correct($dragged);
+              correct += 1;
+            }
+            return all += 1;
           }
-        }
+        });
       });
       return this.show_score([correct, all]);
     };
 
+    Zastap.prototype.show_solutions = function() {
+      var _this = this;
+      this.reset();
+      return $(".paragraph", this.element).each(function(i, par) {
+        return $(".placeholder[data-solution]", par).each(function(j, qpiece) {
+          var $dr, $qp;
+          $qp = $(qpiece);
+          $dr = $(".draggable[data-no=" + $qp.data('solution') + "]", _this.element);
+          return _this.draggable_move($dr, $qp, false);
+        });
+      });
+    };
+
     Zastap.prototype.wrap_words = function(element, wrapper) {
-      var chld, i, ignore, insertWrapped, j, len, space, wordb, _ref, _results;
+      var chld, i, ignore, insertWrapped, j, len, space, wordb, _i, _ref, _results;
       ignore = /^[ \t.,:;()]+/;
       insertWrapped = function(txt, elem) {
         var nw;
@@ -246,7 +450,7 @@
         return $(document.createTextNode(txt)).wrap(nw).parent().attr("data-original", txt).insertBefore(elem);
       };
       _results = [];
-      for (j = _ref = element.get(0).childNodes.length - 1; _ref <= 0 ? j <= 0 : j >= 0; _ref <= 0 ? j++ : j--) {
+      for (j = _i = _ref = element.get(0).childNodes.length - 1; _ref <= 0 ? _i <= 0 : _i >= 0; j = _ref <= 0 ? ++_i : --_i) {
         chld = element.get(0).childNodes[j];
         if (chld.nodeType === document.TEXT_NODE) {
           len = chld.textContent.length;
@@ -278,70 +482,173 @@
 
     return Zastap;
 
-  })(Excercise);
+  })(Exercise);
 
   Przyporzadkuj = (function(_super) {
 
     __extends(Przyporzadkuj, _super);
 
+    Przyporzadkuj.prototype.is_multiple = function() {
+      var qp, _i, _len, _ref;
+      _ref = $(".question-piece", this.element);
+      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+        qp = _ref[_i];
+        if ($(qp).attr('data-solution').split(/[ ,]+/).length > 1) {
+          return true;
+        }
+      }
+      return false;
+    };
+
     function Przyporzadkuj(element) {
-      var _this = this;
       Przyporzadkuj.__super__.constructor.call(this, element);
-      if (this.element.attr('multiple') != null) {
-        this.multiple = true;
-      } else {
-        this.multiple = false;
+      this.multiple = this.is_multiple();
+      this.dragging(this.multiple, true);
+    }
+
+    Przyporzadkuj.prototype.draggable_equal = function(d1, d2) {
+      return d1.data("no") === d2.data("no");
+    };
+
+    Przyporzadkuj.prototype.check_question = function(question) {
+      var all, count, mandatory, minimum, optional, pn, pred, qp, v, _i, _j, _len, _len1, _ref, _ref1;
+      minimum = $(question).data("minimum");
+      count = 0;
+      all = 0;
+      if (!minimum) {
+        all = $(".subject .question-piece", question).length;
       }
-      $(".question", this.element).each(function(i, question) {
-        var draggable_opts;
-        draggable_opts = {
-          revert: 'invalid',
-          helper: _this.multiple ? "clone" : null
-        };
-        $(".draggable", question).draggable(draggable_opts).droppable({
-          accept: ".draggable"
-        });
-        $(".predicate .droppable", question).droppable({
-          accept: ".draggable",
-          drop: function(ev, ui) {
-            var added, is_multiple;
-            is_multiple = ui.draggable.is(".multiple");
-            added = ui.draggable.clone();
-            added.attr('style', '');
-            $(this).append(added);
-            added.draggable(draggable_opts);
-            if (!is_multiple) return ui.draggable.remove();
+      _ref = $(".predicate [data-predicate]", question);
+      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+        pred = _ref[_i];
+        pn = $(pred).attr('data-predicate');
+        if (minimum != null) {
+          all += minimum;
+        }
+        _ref1 = $(".question-piece", pred);
+        for (_j = 0, _len1 = _ref1.length; _j < _len1; _j++) {
+          qp = _ref1[_j];
+          v = this.get_value_optional_list(qp, 'solution');
+          mandatory = v[0];
+          optional = v[1];
+          if (mandatory.indexOf(pn) >= 0 || (minimum && optional.indexOf(pn) >= 0)) {
+            count += 1;
+            this.piece_correct(qp);
+          } else {
+            this.piece_incorrect(qp);
           }
-        });
-        return $(".subject", question).droppable({
-          accept: ".draggable",
-          drop: function(ev, ui) {
-            var added, is_multiple;
-            is_multiple = ui.draggable.is(".multiple");
-            added = ui.draggable.clone();
-            added.attr('style', '');
-            if (!is_multiple) {
-              $(this).append(added);
-              added.draggable(draggable_opts);
-            }
-            return ui.draggable.remove();
+        }
+      }
+      return [count, all];
+    };
+
+    Przyporzadkuj.prototype.solve_question = function(question) {
+      var $ph, $pr, draggables, m, mandatory, minimum, optional, qp, v, _i, _len, _ref, _results;
+      minimum = $(question).data("min");
+      _ref = $(".subject .question-piece", question);
+      _results = [];
+      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+        qp = _ref[_i];
+        v = this.get_value_optional_list(qp, 'solution');
+        mandatory = v[0];
+        optional = v[1];
+        if (minimum) {
+          draggables = mandatory.count(optional).slice(0, minimum);
+        } else {
+          draggables = mandatory;
+        }
+        _results.push((function() {
+          var _j, _len1, _results1;
+          _results1 = [];
+          for (_j = 0, _len1 = draggables.length; _j < _len1; _j++) {
+            m = draggables[_j];
+            $pr = $(".predicate [data-predicate=" + m + "]", question);
+            $ph = $pr.find(".placeholder:visible");
+            _results1.push(this.draggable_move($(qp), $ph.eq(0), this.multiple));
           }
+          return _results1;
+        }).call(this));
+      }
+      return _results;
+    };
+
+    return Przyporzadkuj;
+
+  })(Exercise);
+
+  PrawdaFalsz = (function(_super) {
+
+    __extends(PrawdaFalsz, _super);
+
+    function PrawdaFalsz(element) {
+      var qp, _i, _len, _ref,
+        _this = this;
+      PrawdaFalsz.__super__.constructor.call(this, element);
+      _ref = $(".question-piece", this.element);
+      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+        qp = _ref[_i];
+        $(".true", qp).click(function(ev) {
+          ev.preventDefault();
+          _this.retry();
+          $(ev.target).closest(".question-piece").data("value", "true");
+          return $(ev.target).addClass('chosen').siblings('a').removeClass('chosen');
         });
-      });
+        $(".false", qp).click(function(ev) {
+          ev.preventDefault();
+          _this.retry();
+          $(ev.target).closest(".question-piece").data("value", "false");
+          return $(ev.target).addClass('chosen').siblings('a').removeClass('chosen');
+        });
+      }
     }
 
-    return Przyporzadkuj;
+    PrawdaFalsz.prototype.check_question = function() {
+      var all, good, qp, _i, _len, _ref;
+      all = 0;
+      good = 0;
+      _ref = $(".question-piece", this.element);
+      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+        qp = _ref[_i];
+        if ($(qp).data("solution").toString() === $(qp).data("value")) {
+          good += 1;
+          this.piece_correct(qp);
+        } else {
+          this.piece_incorrect(qp);
+        }
+        all += 1;
+      }
+      return [good, all];
+    };
+
+    PrawdaFalsz.prototype.show_solutions = function() {
+      var qp, _i, _len, _ref, _results;
+      this.reset();
+      _ref = $(".question-piece", this.element);
+      _results = [];
+      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
+        qp = _ref[_i];
+        if ($(qp).data('solution') === true) {
+          _results.push($(".true", qp).click());
+        } else {
+          _results.push($(".false", qp).click());
+        }
+      }
+      return _results;
+    };
+
+    return PrawdaFalsz;
 
-  })(Excercise);
+  })(Exercise);
 
-  excercise = function(ele) {
+  exercise = function(ele) {
     var cls, es;
     es = {
       wybor: Wybor,
       uporzadkuj: Uporzadkuj,
       luki: Luki,
       zastap: Zastap,
-      przyporzadkuj: Przyporzadkuj
+      przyporzadkuj: Przyporzadkuj,
+      prawdafalsz: PrawdaFalsz
     };
     cls = es[$(ele).attr('data-type')];
     return new cls(ele);
@@ -353,8 +660,8 @@
 
   $(document).ready(function() {
     new EduModule($("#book-text"));
-    return $(".excercise").each(function(i, el) {
-      return excercise(this);
+    return $(".exercise").each(function(i, el) {
+      return exercise(this);
     });
   });