added warning window when cancelling an expanded story

app/assets/javascripts/components/story/ExpandedStory/ExpandedStoryControls.js

@@ -1,33 +1,52 @@
-import React from 'react';
-
-const ExpandedStoryControls = ({ onCancel, onSave, onDelete, readOnly }) => {
-  return (
-    <div className="form-group Story__controls">
-      <input className="save"
-        onClick={onSave}
-        type="button"
-        value={I18n.t('save')}
-        disabled={readOnly}
-      />
-
-      <input className="delete"
-        onClick={() => {
-          if (window.confirm(I18n.t('story destroy confirm'))){
-            onDelete();
-          }
-        }}
-        type="button"
-        value={I18n.t('delete')}
-        disabled={readOnly}
-      />
-
-      <input className="cancel"
-        onClick={onCancel}
-        type="button"
-        value={I18n.t('cancel')}
-      />
-    </div>
-  );
+import React, { Component } from 'react';
+
+class ExpandedStoryControls extends Component {
+  constructor(props) {
+    super(props);
+
+    this.handleCancel = this.handleCancel.bind(this);
+  }
+
+  handleCancel() {
+    const { onCancel, isDirty } = this.props;
+
+    if (isDirty && !window.confirm(I18n.t('story unsaved changes'))) {
+      return;
+    }
+    onCancel();
+  }
+
+  render() {
+    const { onSave, onDelete, readOnly } = this.props;
+
+    return (
+      <div className="form-group Story__controls">
+        <input className="save"
+          onClick={onSave}
+          type="button"
+          value={I18n.t('save')}
+          disabled={readOnly}
+        />
+
+        <input className="delete"
+          onClick={() => {
+            if (window.confirm(I18n.t('story destroy confirm'))){
+              onDelete();
+            }
+          }}
+          type="button"
+          value={I18n.t('delete')}
+          disabled={readOnly}
+        />
+
+        <input className="cancel"
+          onClick={this.handleCancel}
+          type="button"
+          value={I18n.t('cancel')}
+        />
+      </div>
+    );
+  }
 };
 
 export default ExpandedStoryControls;

app/assets/javascripts/components/story/ExpandedStory/index.js

@@ -39,6 +39,7 @@ export const ExpandedStory = ({
     <div className="Story Story--expanded">
       <ExpandedStoryControls
         onCancel={onToggle}
+        isDirty={story._editing._isDirty}
         onSave={() => updateStory(story, project.id)}
         onDelete={() => deleteStory(story.id, project.id)}
         readOnly={Story.isAccepted(story)}

config/locales/en.yml

@@ -72,6 +72,7 @@ en:
   reset_tour_success: "Tour was successfully reset"
   reset_tour_fail: "An error has ocurred, please try again"
   story destroy confirm: "Are you sure you want to destroy this story?"
+  story unsaved changes: "You have unsaved changes, are you sure you want to cancel?"
   stories_destroy_success: "Stories were successfully destroyed"
   stories_destroy_fail: "Stories couldn't be destroyed due some validation errors"
   update_stories_successfully: "Stories were successfully updated"

config/locales/es.yml

@@ -68,6 +68,7 @@ es:
   reset_tour_success: "La excursión se restableció correctamente"
   reset_tour_fail: "Ha ocurrido un error, por favor intente otra vez"
   story destroy confirm: "¿Estás seguro de que quieres destruir esta historia?"
+  story unsaved changes: "¿Usted tiene cambios no guardados, está seguro de que desea cancelar?"
   stories_destroy_success: "Las historias fueron destruidas con éxito"
   stories_destroy_fail: "Las historias no se pudieron destruir debido a algunos errores de validación"
   update_stories_successfully: "Las historias se actualizaron con éxito"

config/locales/pt-BR.yml

@@ -69,6 +69,7 @@ pt-BR:
   reset_tour_success: "A tour foi resetada com sucesso"
   reset_tour_fail: "Ocorreu um erro, por favor tente novamente"
   story destroy confirm: "Você tem certeza que deseja excluir esta história?"
+  story unsaved changes: "Você tem mudanças não salvas, tem certeza que deseja cancelar?"
   stories_destroy_success: "As histórias foram destruídas com sucesso"
   stories_destroy_fail: "As histórias não puderam ser destruídas por alguns erros de validação"
   update_stories_successfully: "As histórias foram atualizadas com sucesso"

spec/javascripts/components/story/expanded_story/expanded_story_controls_spec.js

@@ -55,20 +55,60 @@ describe('<ExpandedStoryControls />', () => {
     });
   });
 
-  describe('when the user click on cancell', () => {
+  describe('when the user click on cancel', () => {
+    beforeEach(function() {
+      sinon.stub(window, 'confirm')
+    });
+
+    afterEach(function() {
+      window.confirm.restore();
+    });
+
     it('triggers the toggle callback', () => {
-      const onCancel = sinon.spy();
+      const handleCancel = sinon.spy();
+
+      const wrapper = shallow(
+        <ExpandedStoryControls
+          readOnly={false}
+          onCancel={handleCancel}
+        />
+      );
+
+      wrapper.find('.cancel').simulate('click');
+
+      expect(handleCancel).toHaveBeenCalled();
+    });
+
+    it('triggers a warning window when there is unsaved changes', () => {
+      const handleCancel = sinon.spy();
+
+      const wrapper = shallow(
+        <ExpandedStoryControls
+          readOnly={false}
+          isDirty={true}
+          onCancel={handleCancel}
+        />
+      );
+
+      wrapper.find('.cancel').simulate('click');      
+
+      expect(window.confirm).toHaveBeenCalled();
+    });
+
+    it('does not trigger a warning window when no changes were made', () => {
+      const handleCancel = sinon.spy();
 
       const wrapper = shallow(
         <ExpandedStoryControls
           readOnly={false}
-          onCancel={onCancel}
+          isDirty={false}
+          onCancel={handleCancel}
         />
       );
 
       wrapper.find('.cancel').simulate('click');
 
-      expect(onCancel).toHaveBeenCalled();
+      expect(window.confirm).not.toHaveBeenCalled();
     });
   });