ember – Page 5 – blog.fossasia.org

Stubbed Routing Inbuilt Service used in Open Event Frontend

Post author:sumedh123
Post published:July 28, 2017
Post category:FOSSASIA Open Event
Post comments:0 Comments

In Open Event Frontend, we have used services like ‘auth-manager’, ‘l10n’, ‘loader’, ‘sanitizer’, etc to ease our work with the help of predefined-functions in those services. However, while dealing with an issue in the project, there was a need to use ‘Routing’ as a service.

In the issue, we wanted to generate an access link dynamically from the access code entered by the user. The format of the access link was as follows:

“base_url + event_id + access_code”

So, for the above URL, we needed to have ‘event_id’ and ‘access_code’.

The ‘access_code’ can be readily accessed from the user’s input itself, whereas to get the event_id, we used the ‘Routing’ service in Ember.

Generally to use a service in Ember, it has to be written first,then registered, injected and then used.

‘Routing’ service in Ember is an inbuilt service unlike the ones listed at the beginning.

There is no need to write it. It can be simply registered, injected and used.

this.register('service:routing', routingStub);
this.inject.service('routing', { as: 'routing' });

where ‘register’ and ‘inject’ are the methods on Ember objects.

The integration tests in Open Event Frontend are written such that the services can be used without injecting, but the tests will fail. To pass those tests, we had to register and inject the service in the required component.

The Routing service could thus be registered and injected into the specific component( injection in the component’s integration test ) only but for future needs, this service might be needed in any other component too. For this purpose, this service was registered and injected in ‘component-helper.js’.

const routingStub = Service.extend({
  router: {
    router: {
      state: {
        params: {
          'events.view': {
            event_id: 1
          }
        }
      }
    },
    generate() {
      return 'http://dummy-url.com';
    }
  }
});


export default function(path, name, testCase = null) {
  moduleForComponent(path, name, {
    integration: true,

    beforeEach() {
      this.register('service:routing', routingStub);
      this.inject.service('routing', { as: 'routing' });
      this.register('service:l10n', L10n);
      this.inject.service('l10n', { as: 'l10n' });
      this.application = startApp();
      l10nTestHelper(this);
      run(() => fragmentTransformInitializer.initialize(getOwner(this)));
    }
  }
}

Stubbing a Service: This is a process of faking an app of importing a service when no path is available to import. Stubbing of a service is mainly done when one needs to deal with the testing of the app. In our case, the same is done. We have stubbed the ‘Routing’ service in order to deal with the testing part. It can be seen from the above code that we have generated a ‘routingStub’ which fakes the app while registering the service in the ‘beforeModel’. The next line of code shows the ‘injection’ of service into the app.

Now we are just left with one task i.e to pass ‘routing’ from our integration tests to the component.

test('it renders', function(assert) {
  this.render(hbs`{{forms/events/view/create-access-code routing=routing}}`);
  assert.ok(this.$().html().trim().includes('Save'));
});

Above code shows the same.

Thus we can stub the services in Ember when any component depends on them.

Resources:

Official Ember guide: https://guides.emberjs.com/v2.1.0/testing/testing-components

Blog by Todd Jordan: http://presentationtier.com/stubbing-services-in-emberjs-integration-tests/

Source code: https://github.com/sumedh123/open-event-frontend/blob/0b193ca679ce3b51f65e19ee0d03ac6a679258de/tests/helpers/component-helper.js

Creating System Images UI in Open Event Frontend

Post author:sumedh123
Post published:July 28, 2017
Post category:FOSSASIA Open Event
Post comments:0 Comments

In Open Event Frontend, under the ‘admin/content’ route, ‘system-images’ route is present in which a user can update the image of the event topic he has uploaded at the time of creating an event. We achieved this as follows:

First, we create a route called ‘system/images’.

ember g route admin/content/system-images

This will generate three files:
1) routes/admin/content/system-images.js (route)
2) templates/admin/content/system-images.hbs (template)
3) test/unit/routes/admin/content/system-images-test.js (test file)
We also create a subroute of system-images route so as to render the subtopics queried through API.

ember g route admin/content/system-images/list

This will generate three files:
1) routes/admin/content/system-images/list.js(subroute)
2) templates/admin/content/system-images/list.hbs(template)
3) test/unit/routes/admin/content/system-imageslist-test.js(test file)

From our ‘system-images’ route, we render the ‘system-images’ template. We have a subroute of system-images route called as ‘list’ in which we render the subtopics available to us via API. The left side menu is the content of ‘system-images.hbs’ and the content on the right is it’s subroute i.e ‘list.hbs’. The ‘list’ subroute provides a facility to upload the system image. The API returns an array of objects containing subtopics as follows(single object is shown here, there will be multiple in the array)

{
            id          : 4545,
            name        : 'avatar',
            placeholder : {
              originalImageUrl : 'https://placeimg.com/360/360/any',
              copyright        : 'All rights reserved',
              origin           : 'Google Images'
            }
          },

Following is the content of our uploader i.e ‘list.hbs’ which is a subroute of the system-images.hbs.

<div class="ui segment">
  {{#each model as |subTopic|}}
    <h4>{{subTopic.name}}</h4>
    <img src="{{subTopic.placeholder.originalImageUrl}}" class="ui fluid image" alt={{subTopic.name}}>
    <div class="ui hidden divider"></div>
    <button class="ui button primary" {{action 'openModal' subTopic}} id="changebutton">{{t 'Change'}}</button>
  {{/each}}
</div>
{{modals/change-image-modal isOpen=isModalOpen subTopic=selectedSubTopic}}

We can see from the above template that we are iterating the response(subtopics) from the API. For now, we are just using the mock server response since we don’t have API ready for it. There is one ‘upload’ button which opens up the ‘change-image-modal’ to upload the image which looks as follows:

The ‘change-image-modal.hbs’ has a content as follows:

<div class="sixteen wide column">
        {{widgets/forms/image-upload
          needsCropper=true
          label=(t 'Update Image')
          id='user_image'
          aspectRatio=(if (eq subTopic.name 'avatar') (array 1 1))
          icon='photo'
          hint=(t 'Select Image')
          maxSizeInKb=10000
          helpText=(t 'For Cover Photos : 300x150px (2:1 ratio) image.
                    For Avatar Photos : 150x150px (1:1 ratio) image.')}}

        <form class="ui form">
          <div class="field">
            <label class="ui label">{{t 'Copyright information'}}</label>
            <div class="ui input">
              {{input type="text"}}
            </div>
          </div>
          <div class="field">
            <label class="ui label">{{t 'Origin information'}}</label>
            <div class="ui input">
              {{input type="text"}}
            </div>
          </div>
        </form>

      </div>

The above uploader has a custom ‘image-upload’ widget which we are using throughout the Open Event Frontend. Also, there are two input fields i.e ‘copyright’ and ‘origin’ information of the image. On clicking the ‘Select Image’ button and after selecting our image from the file input, we get a cropper for the image to be uploaded. The image can be cropped there according to the aspect ration maintained for it. The cropper looks like:

Thus, a user can update the image of the Event Topic that he created.

Resources:

Ember JS Official guide.

Mastering modals in Ember JS by Ember Guru.

Source code: https://github.com/fossasia/open-event-frontend

Implementing JSON API for ‘settings/contact-info’ route in Open Event Frontend

Post author:sumedh123
Post published:July 28, 2017
Post category:FOSSASIA Open Event
Post comments:0 Comments

In Open Event Frontend, under the settings route, there is a ‘contact-info’ route which allows the user to change his info (email and contact). Previously to achieve this we were using the mock response from the server. But since we have the JSON API now we could integrate and use the JSON API for it so as to let the user modify his/her email and contact info. In the following section, I will explain how it is built:

The first thing to do is to create the model for the user so as to have a skeleton of the database and include our required fields in it. The user model looks like:

export default ModelBase.extend({
  email        : attr('string'),
  password     : attr('string'),
  isVerified   : attr('boolean', { readOnly: true }),
  isSuperAdmin : attr('boolean', { readOnly: true }),
  isAdmin      : attr('boolean', { readOnly: true }),

  firstName : attr('string'),
  lastName  : attr('string'),
  details   : attr('string'),
  contact   : attr('string'),
});

Above is the user’s model, however just the related fields are included here(there are more fields in user’s model). The above code shows that email and contact are two attributes which will accept ‘string’ values as inputs. We have a contact-info form located at ‘settings/contact-info’ route. It has two input fields as follows:

<form class="ui form {{if isLoading 'loading'}}" {{action 'submit' on='submit'}} novalidate>
  <div class="field">
    <label>{{t 'Email'}}</label>
    {{input type='email' name='email' value=data.email}}
  </div>
  <div class="field">
    <label>{{t 'Phone'}}</label>
    {{input type='text' name='phone' value=data.contact}}
  </div>
  <button class="ui teal button" type="submit">{{t 'Save'}}</button>
</form>

The form has a submit button which triggers the submit action. We redirect the submit action from the component to the controller so as to maintain ‘Data down, actions up’. The code is irrelevant, hence not shown here. Following is the action which is used to update the user which we are handling in the contact-info.js controller.

updateContactInfo() {
      this.set('isLoading', true);
      let currentUser = this.get('model');
      currentUser.save({
        adapterOptions: {
          updateMode: 'contact-info'
        }
      })
        .then(user => {
          this.set('isLoading', false);
          let userData = user.serialize(false).data.attributes;
          userData.id = user.get('id');
          this.get('authManager').set('currentUserModel', user);
          this.get('session').set('data.currentUserFallback', userData);
          this.get('notify', 'Updated information successfully');
        })
        .catch(() => {
        });
    }

We are returning the current user’s model from the route’s model method and storing it into ‘currentUser’ variable. Since we have data binding ember inputs in our contact-info form, the values will be grabbed automatically once the form submits. Thus, we can call ‘save’ method on the ‘currentUser’ model and pass an object called ‘adapterOptions’ which has key ‘updateMode’. We send this key to the ‘user’ serializer so that it picks only the attributes to be updated and omits the other ones. We have customized our user serializer as:

if (snapshot.adapterOptions && snapshot.adapterOptions.updateMode === 'contact-info') {
        json.data.attributes = pick(json.data.attributes, ['email', 'contact']);
}

The ‘save’ method on the ‘currentUser’ ‘currentUser.save()’ returns a promise. We resolve the promise by setting the ‘currentUserModel’ as the updated ‘user’ as returned by the promise. Thus, we are able to update the email and contact-info using the JSON API.

Resources:

Ember data official guide

Blog on models and Ember data by Embedly

Maintaining Aspect Ratio of Images while Uploading in Open Event Frontend

Post author:sumedh123
Post published:July 21, 2017
Post category:FOSSASIA Open Event
Post comments:0 Comments

In Open Event Frontend, we are using the image-upload at many places such as the cover photo of the event on the create event page, also at the system images (in the admin routes) where the user gets to change the image uploaded by him earlier, and also at the ‘profile’ route where the user can change his photo. But at different places, different dimensions of photos are needed since we are keeping standard in Open Event Frontend.

Therefore the image needs to be in a size with the correct ratio at the time of uploading. We are using the cropper component for achieving this. The cropper is a modal which pops up after the image upload modal so that a user can crop the image according to the aspect ratio kept specific for that purpose. It looks as follows:

While dealing with an issue in Open Event Frontend, we had to have change in aspect ratio for ‘avatar’ images, unlike the other images. So, we had to modify our cropper modal so as to have different aspect ratios for different images when needed.

We solved the above problem as follows:

In our image-modal, we pass the aspect ratio as a parameter. So in our case, we wanted to set the aspect ratio 1:1 for the ‘avatar’ images only. Following is the code snippet of what we wanted:

{{widgets/forms/image-upload
needsCropper=true
label=(t 'Update Image')
id='user_image'
aspectRatio=(if (eq subTopic.name 'avatar') (array 1 1))
icon='photo'
hint=(t 'Select Image')
maxSizeInKb=10000
helpText=(t 'For Cover Photos : 300x150px (2:1 ratio) image.
For Avatar Photos : 150x150px (1:1 ratio) image.')}}

Thus, we passed the ‘aspectRatio’ as a parameter to the ‘image-upload’ modal. The image-upload further calls the cropper modal and passes ‘aspectRatio’.

{{#if needsCropper}}
{{modals/cropper-modal isOpen=cropperModalIsShown imgData=imgData onImageCrop=(action 'imageCropped') aspectRatio=aspectRatio}}
{{/if}}

Thus, we can use the passed param i.e ‘aspectRatio’ in our cropper to modify the logic for the aspect ratio. Following is what we did so as to obtain the aspect Ratio of 1:1 for ‘avatar’ images only. The default aspect ratio for all other images is 2:1.

onVisible() {
let viewPort = {};
let factor = 150;
const aspectRatio = this.getWithDefault('aspectRatio', [2, 1]);
viewPort.width = aspectRatio[0] * factor;
viewPort.height = aspectRatio[1] * factor;
viewPort.type = 'square';
this.$('.content').css('height', '300px');
this.$('img').croppie({
customClass : 'croppie',
viewport : viewPort,
boundary : {
height: 250
}
});
},

As shown above, we have kept a multiplying factor which is fixed. According to the aspect ratio specified, we calculate and set the width and height in the viewport object.

Thus, following is the thing (Aspect Ratio 1:1 ) we achieved for the ‘avatar’ images:

Resources
Official Ember JS guide: https://guides.emberjs.com/v1.10.0/templates/actions/

Blog on making our own modals: http://ember.guru/2014/master-your-modals-in-ember-js

Source code: https://github.com/sumedh123/open-event-frontend/tree/system-images

Rendering Child Route Templates Independent of Parent Template in Open Event Frontend

Post author:sumedh123
Post published:July 17, 2017
Post category:FOSSASIA Open Event
Post comments:0 Comments

In the Open Event Frontend, we are having routes and it’s child routes so as to render our content on the webpage. Child routes are needed when we want to have multiple routes under a single route as a subroute. In Ember js, the child routes of a route inherit the parent content in them by default . But, in some cases, we may not want the parent template’s content to get rendered into the child route and may want the child template to be entirely different. This issue deals with the same that how can we achieve the child template entirely different from the parent one.

events/tickets/index

events/tickets/attendees

events/tickets/orders

Above screenshots show the ‘events/tickets’ and it’s child routes. Since the ‘tickets’ is the parent and it contains the left side menu as it’s content which is common in all the child routes shown (orders, attendees, index). The content on the right of the side menu is the child’s own content. Now let’s take the case of ‘tickets/access-codes’ route which has a child route ‘tickets/access-codes/create’ where we do not want to have the parent content in it.

Following screenshots show the above thing that we want to replicate:

events/tickets/access-codes

This is the parent template (in the issue) whose child template had to be entirely different which is shown as follows:

events/tickets/access-codes/create

By default, the content of the parent template i.e ‘tickets/access-codes’ would have been rendered in create.hbs which is it’s child as shown above.

To avoid this behavior, I used the current route path which helps to customize the contents to be rendered in the child. For this I implemented a check which matches the currentRouteName with the one which we want to render (child). If it does not match, then the content of the parent will be rendered along with the child, otherwise, a separate template (only child) without the parent’s content will be rendered. Following code illustrates the same:

{{#if (not-includes session.currentRouteName 'events.view.tickets.access-codes.create')}}
<!-- Things you want to show with the parent content in it.-->
{{else}}
<!-- Things you don't want parent to be in.-->
 {{outlet}}
{{/if}}

Conclusion:

In this way we can customize whether to include the parent’s content in child routes or completely render different child route independent of parent’s content in it.

Resources:

Ember js guide: https://guides.emberjs.com/v1.10.0/routing/rendering-a-template/
Ember js guide on conditionals: https://guides.emberjs.com/v2.2.0/templates/conditionals/
oX blog on Medium: https://ox.sk/nested-routing-in-ember-js-50fa7dc82444

Using ember semantic UI radio buttons to render form elements selectively on Open Event Front End

Post author:CosmicCoder96
Post published:July 8, 2017
Post category:FOSSASIA GSoC Open Event
Post comments:0 Comments

This blog article will illustrate how ember semantic ui radio buttons have been used to render form elements selectively on Open Event Front End and in the process will learn, how to make use of the powerful binding features offered by ember semantic ui for radio buttons via the mut action.

So what do we have to begin with ?

The sample form which we want to create

A form which allows us to chose one of the modes of Paypal payments and displays corresponding fields for it.

What we want is that the radio button should allow us to make a choice and then display the corresponding fields. Now that seems a trivial process, but there is some thought process which goes into this, to end up with the most efficient choice. So first just make the basic form where in all the fields are visible.

Now let’s learn how to make use of the mut action on the radio buttons. What it allows us to do is pass a parameter while calling it, and that parameter name is shared by all the radio buttons belonging to a particular group of radio buttons. And what that action does is, store the name of the currently selected radio button in it. So we can easily keep track of which button has been selected and use that variable in selective rendering of templates. The action is triggered whenever the radio button’s property changes and the trigger is aptly called onChange. So essentially the syntax boils down to this :

<!-- The first radio button -->
{{ui-radio label=(t 'Sandbox mode - Used during development and testing')
           name='paypal_integration_mode'
           value='sandbox'
           onChange=(action (mut selectedMode))}}
<!-- The second radio button -->
{{ui-radio label=(t 'Live mode - Used during production') 
           name='paypal_integration_mode'
           value='live'
           onChange=(action (mut selectedMode))}}

Now whichever button is selected it’s name will be stored in selectedMode in this case. And hence we can use the conditional helpers of handle bars to render elements based on the selected radio button.

The final code looks something like this:

  <.h3 class="ui header">{{t 'PayPal Credentials'}}<./h3>
    <.div class="sub header">
       {{t 'See here on how to obtain these keys.'}}
    <./div>
   <.h5 class="ui header">{{t 'PayPal Integration Mode'}}<./h5>
   <.div class="field">
     {{ui-radio label=(t 'Sandbox mode')
                name='paypal_integration_mode' 
                value='sandbox' 
                current='sandbox'
                onChange=(action (mut selectedMode))}}
   <./div>
   {{#unless (eq selectedMode 'live')}}
     <.div class="field">
       <.label>{{t 'Sandbox username'}}<./label>
       {{input type='text' name='sandbox_username'}}
     <./div>
     <.div class="field">
       <.label>{{t 'Sandbox password'}}<./label>
       {{input type='password' name='sandbox_password'}}
     <./div>
     <.div class="field">
       <.label>{t 'Sandbox signature'}}<./label>
       {{input type='text' name='sandbox_signature'}}
     <./div>
   {{/unless}}
   <.div class="field">
     {{ui-radio label=(t 'Live mode')
                name='paypal_integration_mode'
                value='live' 
                onChange=(action (mut selectedMode))}}
   <./div>
   {{#if (eq selectedMode 'live')}}
     <.div class="field">
      <.label>{{t 'Live username'}}<./label>
       {{input type='text' name='live_username'}}
     <./div>
     <.div class="field">
       <.label>{{t 'Live password'}}<./label>
       {{input type='password' name='live_password'}}
     <./div>
     <.div class="field">
       <.label>{{t 'Live signature'}}<./label>
       {{input type='text' name='live_signature'}}
     <./div>
   {{/if}}
   <.button class="ui teal button" type="submit">
   {{t 'Save'}}
   <./button>

Important tip

The action is triggered by the onChange action, hence the variable doesn’t have the value when the template is rendered for the very first time and hence at that instant, none of the fields will be rendered, to avoid that we have used both if and unless condition helpers instead of identical conditional helpers to cleverly avoid this situation. You can read about the ember radio buttons further more through the official documentation

Resources

Efficient use of event card component on Open Event Frontend

Post author:CosmicCoder96
Post published:June 30, 2017
Post category:FOSSASIA GSoC Open Event
Post comments:0 Comments

Ember JS is a powerful framework when it comes to code reusability. Components are at it’s core and enable the developers to reuse the same code at different places. The event-card component on Open event-front-end is one such component. It is used on various routes across the app thereby illustrating the usefulness. However, in this article we are going to see how components can be made even more efficient by rendering them differently for different situations.Originally the component was used to display events in the card format on the public page.

And this was the code :

<.div class="ui fluid event card">
 <.a class="image" href="{{href-to 'public' event.identifier}}">
   {{widgets/safe-image src=(if event.large event.large event.placeholderUrl)}}
 <./a>
 <.div class="content">
   <.a class="header" href="{{href-to 'public' event.identifier}}">
     <.span>{{event.name}}<./span>
   <./a>
   <.div class="meta">
     <.span class="date">
       {{moment-format event.startTime 'ddd, MMM DD HH:mm A'}}
     <./span>
   <./div>
   <.div class="description">
     {{event.shortLocationName}}
   <./div>
 <./div>
 <.div class="extra content small text">
   <.span class="right floated">
     <.i role="button" class="share alternate link icon" {{action shareEvent event}}><./i>
   <./span>
   <.span>
     {{#each tags as |tag|}}
       <.a>{{tag}}<./a>
     {{/each}}
   <./span>
 <./div>
<./div>

Next we modify it in such a way that it is suitable to be displayed on the explore route as well, and that requires it to be such that is instead of being box-like it should be possible to render it such that it is wide and takes the width of the container it is in. So How do we determine which version should be rendered when. In ember it is really easy to pass on parameters to components while calling them, and they can make use of these paraemeters as they are being rendered. It is best if the name of the parameters is chosen logically, here we want to make it wide for selected routes so we name it : isWide

And the code after modification, would be something like this with isWide taken into account. We will just wrap it an extra div which will conditionally add an extra class ‘wide’ if isWide is true.

<.div class="{{if isWide 'event wide ui grid row'}}">
<.!-- Previous code -->
<./div>

//And the corresponding styling for wide class


.event.wide {
  border-radius: 0 !important;
  margin: 0 !important;

  .column {
    margin: 0;
    padding: 0 !important;
  }

  img {
    height: 170px !important;
    object-fit: cover;
  }

.main.content {

  height: 130px;

  display: block;

}

}

Next What we are going to do is, modify the component to become yieldable. So that they can also be used to display the tickets of a user! `{{yield}}` allows code outside the component to be rendered inside it.

Let’s make a change so that, if the event card component is rendered on the my tickets page, then instead of hashtags it should display the ticket details. Which we will conveniently provide to the component externally (via {{yield}} ) Next we need to determine which version of the component should be rendered when? The hasBlock helper enables us to do just that. So the final code should look something just like this 😉 The hasBlock helper allows us to differentiate between the yieldable and non yieldable forms of the component.

<.div class="{{if isWide 'event wide ui grid row'}}"
 {{#if isWide}}
   {{#unless device.isMobile}}
     <.div class="ui card three wide computer six wide tablet column">
       <.a class="image" href="{{href-to 'public' event.identifier}}">
         {{widgets/safe-image src=(if event.large event.large event.placeholderUrl)}}
       <./a>
     <./div>
   {{/unless}}
 {{/if}}
 <.div class="ui card {{unless isWide 'event fluid' 'thirteen wide computer ten wide tablet sixteen wide mobile column'}}">
   {{#unless isWide}}
     <.a class="image" href="{{href-to 'public' event.identifier}}">
       {{widgets/safe-image src=(if event.large event.large event.placeholderUrl)}}
     <./a>
   {{/unless}}
   <.div class="main content">
     <.a class="header" href="{{href-to 'public' event.identifier}}">
       <.span>{{event.name}}<./span>
     <./a>
     <.div class="meta">
       <.span class="date">
         {{moment-format event.startTime 'ddd, MMM DD HH:mm A'}}
       <./span>
     <./div>
     <.div class="description">
       {{event.shortLocationName}}
     <./div>
   <./div>
   <.div class="extra content small text">
     <.span class="right floated">
       <.i role="button" class="share alternate link icon" {{action shareEvent event}}><./i>
     <./span>
     <.span>
       {{#if hasBlock}}
         {{yield}}
       {{else}}
         {{#each tags as |tag|}}
           <.a>{{tag}}<./a>
         {{/each}}
       {{/if}}
     <./span>
   <./div>
 <./div>
<./div>

And now the component can be used for displaying the tickets, with the area displaying hashtags now being replaced by the order details.

Creating nested routes in Open Event Front-end and Navigating them with Tabs via semantic UI – Ember Integration

Post author:CosmicCoder96
Post published:June 5, 2017
Post category:FOSSASIA Open Event
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Semantic UI is a modern development framework which helps build responsive and aesthetically beautiful layouts. While it is a really powerful framework in itself, it additionally offers seamless integrations with some of the other open source frameworks including ember js.

Open Event Front-end is a project of FOSSASIA organisation, which was created with the aim of decoupling the front end and the back end for the open event orga server. It is primarily based on ember JS and uses semantic UI for it’s UI.

Here we will be making a nested route /events/ with /events/live/, events/draft, events/past , events/import as it’s subroutes.

To get started with it, we simply use the ember CLI to generate the routes

$ ember generate route events

Then we go on to generate the successive sub routes as follows

$ ember generate route events/live
$ ember generate route events/past
$ ember generate route events/draft
$ ember generate route events/import

The router.js file should be looking like this now.

this.route('events', function() {
    this.route('live');
    this.route('draft');
    this.route('past');
    this.route('import');
  });

This means that our routes and sub routes are in place. Since we used the ember CLI to generate these routes, the template files for them would have generated automatically. Now these routes exist and we need to write the data in the templates of these routes which will get displayed to the end user.

Since the routes are nested, the content of the parent route can be made available to all the children routes via the outlet in ember js.

Next, we go to the template file of events/ route which is at templates/events.hbs And write the following code to create a menu and use ember integration of semantic UI link-to to link the tabs of the menu with the corresponding correct route. It will take care of selecting the appropriate data for the corresponding route and display it in the correct tab via the outlet

<.div class="row">
  <.div class="sixteen wide column">
    <.div class="ui fluid pointing secondary menu">
      {{#link-to 'events.live' class='item'}}
        {{t 'Live'}}
      {{/link-to}}
      {{#link-to 'events.draft' class='item'}}
        {{t 'Draft'}}
      {{/link-to}}
      {{#link-to 'events.past' class='item'}}
        {{t 'Past'}}
      {{/link-to}}
      {{#link-to 'events.import' class='item'}}
        {{t 'Import'}}
      {{/link-to}}
    <./div>
  <./div>
<./div>
<.div class="ui segment">
  {{outlet}}
<./div>

So finally, we start filling in the data for each of these routes. Let’s fill some dummy data at templates/events/live.hbs

<.div class="row">
  <.div class="sixteen wide column">
    <.table class="ui tablet stackable very basic table">
      <.thead>
        <.tr>
          <.th>{{t 'Name'}}<./th>
          <.th>{{t 'Date'}}<./th>
          <.th>{{t 'Roles'}}<./th>
          <.th>{{t 'Sessions'}}<./th>
          <.th>{{t 'Speakers'}}<./th>
          <.th>{{t 'Tickets'}}<./th>
          <.th>{{t 'Public URL'}}<./th>
          <.th><./th>
        <./tr>
      <./thead>
      <.tbody>
        <.tr>
          <.td>
            <.div class="ui header weight-400">
              <.img src="http://placehold.it/200x200" alt="Event logo" class="ui image">
              Sample Event
            <./div>
          <./td>
          <.td>
            March 18, 2016 - 09:30 AM
            <.br>(to)<.br>
            March 20, 2016 - 05:30 PM
          <./td>
          <.td>
            <.div class="ui ordered list">
              <.div class="item">sample@gmail.com ({{t 'Organizer'}})<./div>
              <.div class="item">sample2@gmail.com ({{t 'Manager'}})<./div>
            <./div>
          <./td>
          <.td>
            <.div class="ui list">
              <.div class="item">{{t 'Drafts'}}: 0<./div>
              <.div class="item">{{t 'Submitted'}}: 0<./div>
              <.div class="item">{{t 'Accepted'}}: 0<./div>
              <.div class="item">{{t 'Confirmed'}}: 0<./div>
              <.div class="item">{{t 'Pending'}}: 0<./div>
              <.div class="item">{{t 'Rejected'}}: 0<./div>
            <./div>
          <./td>
          <.td>
            2
          <./td>
          <.td>
            <.div class="ui bulleted list">
              <.div class="item">{{t 'Premium'}} (12/100)<./div>
              <.div class="item">{{t 'VIP'}} (10/15)<./div>
              <.div class="item">{{t 'Normal'}} (100/200)<./div>
              <.div class="item">{{t 'Free'}} (100/500)<./div>
            <./div>
          <./td>
          <.td>
            <.div class="ui link list">
              <.a class="item" target="_blank" rel="noopener" href="http://nextgen.eventyay.com/e/ecc2001a">
                http://nextgen.eventyay.com/e/ecc2001a
              <./a>
            <./div>
          <./td>
          <.td class="center aligned">
            <.div class="ui vertical compact basic buttons">
              {{#ui-popup content=(t 'Edit event details') class='ui icon button'}}
                <.i class="edit icon"><./i>
              {{/ui-popup}}
              {{#ui-popup content=(t 'View event details') class='ui icon button'}}
                <.i class="unhide icon"><./i>
              {{/ui-popup}}
              {{#ui-popup content=(t 'Delete event') class='ui icon button'}}
                <.i class="trash outline icon"><./i>
              {{/ui-popup}}
            <./div>
          <./td>
        <./tr>
      <./tbody>
    <./table>
  <./div>
<./div>

Similarly we can fill the required data for each of the routes.And this is it, our nested route is ready. Here is a screenshot what you might expect.

Resources

ember.js – the right choice for the Open Event Front-end

Post author:CosmicCoder96
Post published:May 30, 2017
Post category:Event Management FOSSASIA GSoC Open Event
Post comments:0 Comments

With the development of the API server for the Open Event project we needed to decide which framework to choose for the new Open Event front-end. With the plethora of javascript frameworks available, it got really difficult to decide, which one is actually the right choice. Every month a new framework arrives, and the existing ones keep actively updating themselves often. We decided to go with Ember.js. This article covers the emberJS framework and highlights its advantages over others and demonstrates its usefulness.

EmberJS is an open-source JavaScript application front end framework for creating web applications, and uses Model-View-Controller (MVC) approach. The framework provides universal data binding. It’s focus lies on scalability.

Why is Ember JS great?

Convention over configuration – It does all the heavy lifting.

Ember JS mandates best practices, enforces naming conventions and generates the boilerplate code for the various components and routes itself. This has advantages other than uniformity. It is easier for other developers to join the project and start working right away, instead of spending hours on existing codebase to understand it, as the core structure of all ember apps is similar. To get an ember app started with the basic route, user doesn’t has to do much, ember does all the heavy lifting.

ember new my-app
ember server

After installing this is all it takes to create your app.

Ember CLI

Similar to Ruby on Rails, ember has a powerful CLI. It can be used to generate boiler plate codes for components, routes, tests and much more. Testing is possible via the CLI as well.

ember generate component my-component
ember generate route my-route
ember test

These are some of the examples which show how easy it is to manage the code via the ember CLI.

Tests.Tests.Tests.

Ember JS makes it incredibly easy to use test-first approach. Integration tests, acceptance tests, and unit tests are in built into the framework. And can be generated from the CLI itself, the documentation on them is well written and it’s really easy to customise them.

ember generate acceptance-test my-test

This is all it takes to set up the entire boiler plate for the test, which you can customise

Excellent documentation and guides

Ember JS has one of the best possible documentations available for a framework. The guides are a breeze to follow. It is highly recommended that, if starting out on ember, make the demo app from the official ember Guides. That should be enough to get familiar with ember.

Ember Guides is all you need to get started.

Ember Data

It sports one of the best implemented API data fetching capabilities. Fetching and using data in your app is a breeze. Ember comes with an inbuilt data management library Ember Data.

To generate a data model via ember CLI , all you have to do is

ember generate model my-model

Where is it being used?

Ember has a huge community and is being used all around. This article focuses on it’s salient features via the example of Open Event Orga Server project of FOSSASIA. The organizer server is primarily based on FLASK with jinja2 being used for rendering templates. At the small scale, it was efficient to have both the front end and backend of the server together, but as it grew larger in size with more refined features it became tough to keep track of all the minor edits and customizations of the front end and the code started to become complex in nature. And that gave birth to the new project Open Event Front End which is based on ember JS which will be covered in the next week.

With the orga server being converted into a fully functional API, the back end and the front end will be decoupled thereby making the code much cleaner and easy to understand for the other developers that may wish to contribute in the future. Also, since the new front end is being designed with ember JS, it’s UI will have a lot of enhanced features and enforcing uniformity across the design would be much easier with the help of components in ember. For instance, instead of making multiple copies of the same code, components are used to avoid repetition and ensure uniformity (change in one place will reflect everywhere)

<.div class="{{if isWide 'event wide ui grid row'}}">
  {{#if isWide}}
    {{#unless device.isMobile}}
      <.div class="ui card three wide computer six wide tablet column">
        <.a class="image" href="{{href-to 'public' event.identifier}}">
          {{widgets/safe-image src=(if event.large event.large event.placeholderUrl)}}
        <./a>
      <./div>
    {{/unless}}
  {{/if}}
  <.div class="ui card {{unless isWide 'event fluid' 'thirteen wide computer ten wide tablet sixteen wide mobile column'}}">
    {{#unless isWide}}
      <.a class="image" href="{{href-to 'public' event.identifier}}">
        {{widgets/safe-image src=(if event.large event.large event.placeholderUrl)}}
      <./a>
    {{/unless}}
    <.div class="main content">
      <.a class="header" href="{{href-to 'public' event.identifier}}">
        <.span>{{event.name}}<./span>
      <./a>
      <.div class="meta">
        <.span class="date">
          {{moment-format event.startTime 'ddd, MMM DD HH:mm A'}}
        <./span>
      <./div>
      <.div class="description">
        {{event.shortLocationName}}
      <./div>
    <./div>
    <.div class="extra content small text">
      <.span class="right floated">
        <.i role="button" class="share alternate link icon" {{action shareEvent event}}><./i>
      <./span>
      <.span>
        {{#if isYield}}
          {{yield}}
        {{else}}
          {{#each tags as |tag|}}
            <.a>{{tag}}<./a>
          {{/each}}
        {{/if}}
      <./span>
    <./div>
  <./div>
<./div>

This is a perfect example of the power of components in ember, this is a component for event information display in a card format which in addition to being rendered differently for various screen sizes can act differently based on passed parameters, thereby reducing the redundancy of writing separate components for the same.

Ember is a step forward towards the future of the web. With the help of Babel.js it is possible to write ES6/2015 syntax and not worry about it’s compatibility with the browsers. It will take care of it.

This is perfectly valid and will be compatible with majority of the supported browsers.

actions: {
  submit() {
    this.onValid(()=> {
    });
  }
}

Some references used for the blog article:

This page/product/etc is unaffiliated with the Ember project. Ember is a trademark of Tilde Inc