Replace $.ajax() with fetch()

assets/assetpack.def

@@ -150,6 +150,7 @@
 < ../node_modules/chosen-js/chosen.jquery.js
 < ../node_modules/jquery-ujs/src/rails.js
 < javascripts/disable_animations.js [mode==test]
+< javascripts/fetch_status.js [mode==test]
 
 ! anser.js
 < javascripts/anser-import.js

assets/javascripts/admin_assets.js

@@ -121,37 +121,42 @@ function reloadAssetsTable() {
 }
 
 function deleteAsset(assetId) {
-  $.ajax({
-    url: urlWithBase('/api/v1/assets/' + assetId),
-    method: 'DELETE',
-    dataType: 'json',
-    success: function () {
+  fetchWithCSRF(urlWithBase(`/api/v1/assets/${assetId}`), {method: 'DELETE'})
+    .then(response => {
+      // not checking for status code as 404 case also returns proper json
+      return response.json();
+    })
+    .then(response => {
+      if (response.error) throw response.error;
       addFlash(
         'info',
-        'The asset was deleted successfully. The asset table\'s contents are cached. Hence the removal is not immediately visible. To update the view use the "Trigger asset cleanup" button. Note that this is an expensive operation which might take a while.'
+        "The asset was deleted successfully. The asset table's contents are cached." +
+          'Hence the removal is not immediately visible. To update the view use the "Trigger asset cleanup" button.' +
+          'Note that this is an expensive operation which might take a while.'
       );
-    },
-    error: function (xhr, ajaxOptions, thrownError) {
-      var error_message = xhr.responseJSON.error;
-      addFlash('danger', error_message);
-    }
-  });
+    })
+    .catch(error => {
+      console.error(error);
+      addFlash('danger', `Error deleting asset: ${error}`);
+    });
 }
 
 function triggerAssetCleanup(form) {
-  $.ajax({
-    url: form.action,
-    method: form.method,
-    success: function () {
+  fetchWithCSRF(form.action, {method: form.method})
+    .then(response => {
+      if (!response.ok) throw `Server returned ${response.status}: ${response.statusText}`;
+      return response.json();
+    })
+    .then(response => {
       addFlash(
         'info',
-        'Asset cleanup has been triggered. Open the <a href="/minion/jobs?task=limit_assets">Minion dashboard</a> to keep track of the task.'
+        `Asset cleanup has been triggered. Open the <a href="/minion/jobs?task=limit_assets">Minion dashboard</a> to keep track of the task (gru_id #${response.gru_id}).`
       );
-    },
-    error: function (xhr, ajaxOptions, thrownError) {
-      addFlash('danger', 'Unable to trigger the asset cleanup: ' + thrownError);
-    }
-  });
+    })
+    .catch(error => {
+      console.error(error);
+      addFlash('danger', `Unable to trigger the asset cleanup: ${error}`);
+    });
 }
 
 function showLastAssetStatusUpdate(assetStatus) {

assets/javascripts/admin_groups.js

@@ -37,21 +37,23 @@ function showError(message) {
 }
 
 function fetchHtmlEntry(url, targetElement) {
-  $.ajax({
-    url: url,
-    method: 'GET',
-    success: function (response) {
+  fetch(url)
+    .then(response => {
+      if (!response.ok) throw `Server returned ${response.status}: ${response.statusText}`;
+      return response.text();
+    })
+    .then(response => {
       var element = $(response);
       element.hide();
       targetElement.prepend(element);
       $('#new_group_creating').hide();
       $('#add_group_modal').modal('hide');
       element.fadeIn('slow');
-    },
-    error: function (xhr, ajaxOptions, thrownError) {
-      showError(thrownError + ' (requesting entry HTML, group probably added though! - reload page to find out)');
-    }
-  });
+    })
+    .catch(error => {
+      console.error(error);
+      showError(`${error} (requesting entry HTML, group probably added though! - reload page to find out)`);
+    });
 }
 
 function countEmptyInputs(form) {
@@ -87,7 +89,7 @@ function createGroup(form) {
   $('#new_group_error').hide();
   $('#new_group_creating').show();
 
-  let data = $(form).serialize();
+  let data = new FormData(form);
   let postUrl, rowUrl, targetElement;
   if (form.dataset.createParent !== 'false') {
     postUrl = form.dataset.postParentGroupUrl;
@@ -99,36 +101,26 @@ function createGroup(form) {
     const parentId = form.dataset.parentId;
     if (parentId !== 'none') {
       targetElement = $('#parent_group_' + parentId).find('ul');
-      data += '&parent_id=' + parentId;
+      data.set('parent_id', parentId);
     } else {
       targetElement = $('#job_group_list');
     }
   }
 
-  $.ajax({
-    url: postUrl,
-    method: 'POST',
-    data: data,
-    success: function (response) {
-      if (!response) {
-        showError('Server returned no response');
-        return;
-      }
-      var id = response.id;
-      if (!id) {
-        showError('Server returned no ID');
-        return;
-      }
+  fetchWithCSRF(postUrl, {method: 'POST', body: data})
+    .then(response => {
+      if (!response.ok) throw `Server returned ${response.status}: ${response.statusText}`;
+      return response.json();
+    })
+    .then(response => {
+      if (!response) throw 'Server returned no response';
+      if (!response.id) throw 'Server returned no ID';
       fetchHtmlEntry(rowUrl + response.id, targetElement);
-    },
-    error: function (xhr, ajaxOptions, thrownError) {
-      if (xhr.responseJSON.error) {
-        showError(xhr.responseJSON.error);
-      } else {
-        showError(thrownError);
-      }
-    }
-  });
+    })
+    .catch(error => {
+      console.error(error);
+      showError(error);
+    });
 
   return false;
 }
@@ -262,24 +254,25 @@ function saveReorganizedGroups() {
   var updateJobGroupUrl = jobGroupList.data('put-job-group-url');
 
   // event handlers for AJAX queries
-  var handleError = function (xhr, ajaxOptions, thrownError) {
+  var handleError = function (error) {
+    console.error(error);
     $('#reorganize_groups_panel').show();
     $('#reorganize_groups_error').show();
     $('#reorganize_groups_progress').hide();
-    $('#reorganize_groups_error_message').text(thrownError ? thrownError : 'something went wrong');
+    $('#reorganize_groups_error_message').text(error ? error : 'something went wrong');
     $('html, body').animate({scrollTop: 0}, 1000);
   };
 
   var handleSuccess = function (response, groupLi, index, parentId) {
     if (!response) {
-      handleError(undefined, undefined, 'Server returned nothing');
+      handleError('Server returned nothing');
       return;
     }
 
     if (!response.nothingToDo) {
       var id = response.id;
       if (!id) {
-        handleError(undefined, undefined, 'Server returned no ID');
+        handleError('Server returned no ID');
         return;
       }
 
@@ -292,7 +285,7 @@ function saveReorganizedGroups() {
 
     if (ajaxQueries.length) {
       // do next query
-      $.ajax(ajaxQueries.shift());
+      handleQuery(ajaxQueries.shift());
     } else {
       // all queries done
       if (showPanelTimeout) {
@@ -325,7 +318,7 @@ function saveReorganizedGroups() {
       ajaxQueries.push({
         url: updateGroupUrl + groupId,
         method: 'PUT',
-        data: {
+        body: {
           sort_order: groupIndex,
           parent_id: 'none',
           drag: 1
@@ -350,7 +343,7 @@ function saveReorganizedGroups() {
             ajaxQueries.push({
               url: updateJobGroupUrl + jobGroupId,
               method: 'PUT',
-              data: {
+              body: {
                 sort_order: childGroupIndex,
                 parent_id: groupId,
                 drag: 1
@@ -366,9 +359,30 @@ function saveReorganizedGroups() {
   });
 
   if (ajaxQueries.length) {
-    $.ajax(ajaxQueries.shift());
+    handleQuery(ajaxQueries.shift());
   } else {
     handleSuccess({nothingToDo: true});
   }
   return false;
 }
+
+function handleQuery(query) {
+  const url = query.url;
+  delete query.url;
+  const success = query.success;
+  delete query.success;
+  const error = query.error;
+  delete query.error;
+  const body = new FormData();
+  for (const key in query.body) {
+    body.append(key, query.body[key]);
+  }
+  query.body = body;
+  fetchWithCSRF(url, query)
+    .then(response => {
+      if (!response.ok) throw `Server returned ${response.status}: ${response.statusText}`;
+      return response.json();
+    })
+    .then(success)
+    .catch(error);
+}

assets/javascripts/admin_needle.js

@@ -158,10 +158,12 @@ function setupAdminNeedles() {
         deleteBunchOfNeedles();
       };
 
-      $.ajax({
-        url: url + nextIDs.join('&id='),
-        type: 'DELETE',
-        success: function (response) {
+      fetchWithCSRF(url + nextIDs.join('&id='), {method: 'DELETE'})
+        .then(response => {
+          if (!response.ok) throw `Server returned ${response.status}: ${response.statusText}`;
+          return response.json();
+        })
+        .then(response => {
           // add error affecting all deletions
           var singleError = response.error;
           if (singleError) {
@@ -191,11 +193,11 @@ function setupAdminNeedles() {
           });
 
           deleteBunchOfNeedles();
-        },
-        error: function (xhr, ajaxOptions, thrownError) {
-          handleSingleError(thrownError);
-        }
-      });
+        })
+        .catch(error => {
+          console.error(error);
+          handleSingleError(error);
+        });
 
       return true;
     };

assets/javascripts/admin_user.js

@@ -22,46 +22,43 @@ function setup_admin_user() {
       return;
     }
 
-    var data = form.serializeArray();
-    var newRole = data[1].value;
+    var data = new FormData(form[0]);
+    var newRole = data.get('role');
 
-    $.ajax({
-      type: 'POST',
-      url: form.attr('action'),
-      data: jQuery.param(data),
-      success: function (data) {
+    fetch(form.attr('action'), {method: 'POST', body: data})
+      .then(response => {
+        if (!response.ok) throw `Server returned ${response.status}: ${response.statusText}`;
         findDefault(form).removeClass('default');
         form.find('input[value="' + newRole + '"]').addClass('default');
-      },
-      error: function (err) {
+      })
+      .catch(error => {
+        console.error(error);
         rollback(form);
-        addFlash('danger', 'An error occurred when changing the user role');
-      }
-    });
+        addFlash('danger', `An error occurred when changing the user role: ${error}`);
+      });
   });
 
   window.deleteUser = function (id) {
     if (!confirm('Are you sure you want to delete this user?')) return;
 
-    $.ajax({
-      url: urlWithBase('/api/v1/user/' + id),
-      method: 'DELETE',
-      dataType: 'json',
-      success: function () {
+    fetchWithCSRF(urlWithBase('/api/v1/user/' + id), {method: 'DELETE'})
+      .then(response => {
+        if (response.status >= 500 && response.status < 600)
+          throw 'An internal server error has occurred. Maybe there are unsatisfied foreign key restrictions in the DB for this user.';
+        if (!response.ok) throw `Server returned ${response.status}: ${response.statusText}`;
+        return response.json();
+      })
+      .then(response => {
+        if (response.error) throw response.error;
         addFlash('info', 'The user was deleted successfully.');
         window.admin_user_table
           .row($('#user_' + id))
           .remove()
           .draw();
-      },
-      error: function (xhr, ajaxOptions, thrownError) {
-        if (xhr.responseJSON && xhr.responseJSON.error) addFlash('danger', xhr.responseJSON.error);
-        else
-          addFlash(
-            'danger',
-            'An error has occurred. Maybe there are unsatisfied foreign key restrictions in the DB for this user.'
-          );
-      }
-    });
+      })
+      .catch(error => {
+        console.error(error);
+        addFlash('danger', error);
+      });
   };
 }

assets/javascripts/admin_worker.js

@@ -61,18 +61,17 @@ function loadWorkerTable() {
 
 function deleteWorker(deleteBtn) {
   var post_url = $(deleteBtn).attr('post_delete_url');
-  $.ajax({
-    url: post_url,
-    method: 'DELETE',
-    dataType: 'json',
-    success: function (data) {
+  fetchWithCSRF(post_url, {method: 'DELETE'})
+    .then(response => {
+      return response.json();
+    })
+    .then(response => {
+      if (response.error) throw response.error;
       var table = $('#workers').DataTable();
       table.row($(deleteBtn).parents('tr')).remove().draw();
-      addFlash('info', data.message);
-    },
-    error: function (xhr, ajaxOptions, thrownError) {
-      var message = xhr.responseJSON.error;
-      addFlash('danger', "The worker couldn't be deleted: " + message);
-    }
-  });
+      addFlash('info', response.message);
+    })
+    .catch(error => {
+      addFlash('danger', "The worker couldn't be deleted: " + error);
+    });
 }