infer file type from uploaded file

2015-03-10 11:20:48 +01:00
parent 0c47337d5a
commit 8ef0e92914
1 changed files with 5 additions and 1 deletions
--- a/app/assets/javascripts/exercises.js.erb
+++ b/app/assets/javascripts/exercises.js.erb
@ -0,0 +1,95 @@
+$(function() {
+  var ACE_FILES_PATH = '/assets/ace/';
+  var FILE_TYPES = <%= FileType.where('file_extension IS NOT NULL').map { |file_type| [file_type.file_extension, file_type.id] }.to_h.to_json %>;
+  var TAB_KEY_CODE = 9;
+
+  var addFileForm = function(event) {
+    event.preventDefault();
+    var element = $('#dummies').children().first().clone();
+    var html = $('<div>').append(element).html().replace(/index/g, new Date().getTime());
+    $('#files').append(html);
+    $('#files select').chosen({
+      disable_search_threshold: 5,
+      search_contains: true
+    });
+    $('body, html').scrollTo('#add-file');
+  };
+
+  var discardFile = function(event) {
+    event.preventDefault();
+    $(this).parents('li').remove();
+  };
+
+  var enableInlineFileCreation = function() {
+    $('#add-file').on('click', addFileForm);
+    $('#files').on('click', 'li .discard-file', discardFile);
+    $('form.edit_exercise, form.new_exercise').on('submit', function() {
+      $('#dummies').html('');
+    });
+  };
+
+  var highlightCode = function() {
+    $('pre code').each(function(index, element) {
+      hljs.highlightBlock(element);
+    });
+  };
+
+  var inferFileAttributes = function() {
+    $(document).on('change', 'input[type="file"]', function(event) {
+      var filename = $(this).val().split(/\\|\//g).pop();
+      var file_type_id = FILE_TYPES['.' + filename.split('.')[1]];
+      var parent = $(this).parents('li');
+      parent.find('input[name*="name"]').val(filename.split('.')[0]);
+      parent.find('select[name*="file_type_id"]').val(file_type_id);
+      parent.find('select[name*="file_type_id"]').trigger('chosen:updated');
+    });
+  };
+
+  var insertTabAtCursor = function(textarea) {
+    var selection_start = textarea.get(0).selectionStart;
+    var selection_end = textarea.get(0).selectionEnd;
+    textarea.val(textarea.val().substring(0, selection_start) + "\t" + textarea.val().substring(selection_end));
+    textarea.get(0).selectionStart = selection_start + 1;
+    textarea.get(0).selectionEnd = selection_start + 1;
+  };
+
+  var observeFileRoleChanges = function() {
+    $(document).on('change', 'select[name$="[role]"]', function() {
+      var is_test_file = $(this).val() === 'teacher_defined_test';
+      var parent = $(this).parents('.panel');
+      parent.find('[name$="[feedback_message]"]').attr('disabled', !is_test_file);
+      parent.find('[name$="[weight]"]').attr('disabled', !is_test_file);
+    });
+  };
+
+  var overrideTextareaTabBehavior = function() {
+    $('.form-group textarea').on('keydown', function(event) {
+      if (event.which === TAB_KEY_CODE) {
+        event.preventDefault();
+        insertTabAtCursor($(this));
+      }
+    });
+  };
+
+  var toggleCodeHeight = function() {
+    $('code').on('click', function() {
+      $(this).css({
+        'max-height': 'initial'
+      });
+    });
+  };
+
+  if ($.isController('exercises')) {
+    if ($('.edit_exercise, .new_exercise').isPresent()) {
+      new MarkdownEditor('#exercise_instructions');
+      enableInlineFileCreation();
+      inferFileAttributes();
+      observeFileRoleChanges();
+      overrideTextareaTabBehavior();
+    }
+    toggleCodeHeight();
+    if (window.hljs) {
+      highlightCode();
+    }
+  }
+});