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https://github.com/sukima/ember-confirmed

An Ember asynchronous confirmation addon
https://github.com/sukima/ember-confirmed

ember ember-addon javascript

Last synced: 8 months ago
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An Ember asynchronous confirmation addon

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# ember-confirmed



An Ember asynchronous confirmation addon



A very simple *promise-like* API for easily showing a confirmation and

resolving to the result of the user input. Its main goal is to replace or

enhance the typical `window.confirm` and many adhoc event based solutions (see

example below).



Special thanks to [FunnelCloud Inc.](http://funnelcloud.io/) for graciously

providing inspiration, R+D, and support.



License: MIT



## Installation



```

ember install ember-confirmed

```



## Usage



```

import Confirmer from 'confirmer';

```



Much like the `Promise` API the constructor for the `Confirmer` takes

a function. That function is passed a resolver object which has four functions

on it that you can use to *fulfill* the `Confirmer`.



```js

new Confirmer(function (resolver) {

  // Affirm confirmation

  resolver.confirm();

  // Reject confirmation

  resolver.reject();

  // Cancel confirmation

  resolver.cancel();

  // Reject with an Error

  resolver.error(new Error());

})

```



Each state can take an optional value. The `Confirmer` is a wrapper around

a `Promise` and can be treated as a promise. For example to capture any errors

or exceptions you may trigger you would use the `catch()` function.



```js

new Confirmer(function (resolver) { … })

  .catch(function (reason) { console.error(reason); });

```



The `then()` function will be passed the underlying data object:



```

new Confirmer(function (resolver) { … })

  .then(function (result) {

    console.log(result.reason);

    console.log(result.value);

  });

```



The `reason` being one of `rejected`, `confirmed`, or `cancelled`. And the

`value` is the value passed to one of the resolver functions.



The following methods are chainable:



#### `onCanceled`



Is called when `resolver.cancel()` is triggered. Used to denote that the

confirmation was cancelled and perhaps should do nothing.



#### `onConfirmed`



Is called when `resolver.confirm()` is triggered. Used to denote that the user

has confirmed in some way. ("OK" button, correct login credentials, etc.)



#### `onRejected`



Is called when `resolver.rejected()` is triggered. Used to denote that the user

has performed an action that denied the confirmation. ("No" button, bad

password, etc.)



#### `onDone`



Is called when **any** of the resolver functions are triggered. This is used for

clean up like closing the dialog and removing stale event handlers. This is also

called if the `resolver.error` is triggered or something throws an exception in

the initialization function (which can be captued by the `catch()` function just

like a promise).



## Examples



The following are example situations that I've run into and how this module can

help reason about them.



### Basic `window.confirm`



In this example we will wrap the `window.confirm`. Although this is **not**

asynchronous it does illustrate the API.



```js

new Confirmer(function (resolver) {

  if (confirm('Whould you like to do this?')) {

    resolver.confirm();

  } else {

    resolver.cancel();

  }

})

  .onConfirmed(function () { console.log('Ok! let\'s crack on!'); })

  .onCancelled(function () { console.log('Maybe next time then?'); })

  .onDone(function () { console.log('Confirm completed') });

```



### Example component



```hbs

Result was confirmed: {{if confirmed 'YES' 'NO'}}



{{#if resolver}}

  
Confirmation?


  Cancel

  Ok

{{else}}

  Show Dialog

{{/if}}

```



```js

import Component from '@ember/component';

import Confirmer from 'confirmer';



export default Component.extend({

  actions: {

    showDialog() {

      new Confirmer(resolver => this.set('resolver', resolver))

        .onConfirmed(() => this.set('confirmed', true))

        .onCancelled(() => this.set('confirmed', false))

        .onDone(() => this.set('resolver', null));

    }

  }

});

```



### Password prompt



Maybe the resolution of the confirmation needs more logic. For example asking

for a password.



```hbs

Result was confirmed: {{if confirmed 'YES' 'NO'}}



{{#if resolver}}

  

    Password: {{input type="password" value=password}}

  

  Cancel

  Ok

{{else}}

  Show Dialog

{{/if}}

```



```js

import Component from '@ember/component';

import Confirmer from 'confirmer';



const REAL_PASSWORD = 'password';



export default Component.extend({

  actions: {

    showDialog() {

      new Confirmer(resolver => this.set('resolver', resolver))

        .onConfirmed(password => {

          this.set('confirmed', password === REAL_PASSWORD);

        })

        .onCancelled(() => this.set('confirmed', false))

        .onDone(() => this.set('resolver', null));

    }

  }

});

```



### Auto closing message box



Here is an example of a message box that auto closes after 5 seconds.



Notice that you can call the resolver functions multiple times and only the

first one wins.



```js

import Component from '@ember/component';

import { later } from '@ember/runloop';

import Confirmer from 'confirmer';



const DIALOG_AUTO_CLOSE_DELAY = 5000;



export default Component.extend({

  actions: {

    showDialog() {

      new Confirmer(resolver => {

        later(resolver.cancel, DIALOG_AUTO_CLOSE_DELAY);

        this.set('resolver', resolver);

      })

        .onConfirmed(() => this.set('confirmed', true))

        .onCancelled(() => this.set('confirmed', false))

        .onDone(() => this.set('resolver', null));

    }

  }

});

```



### Unsaved changes confirmation on route transition



Here is an example if trapping a route transition and showing a confirmation

dialog if the data is not saved (dirty).



It shows how you can pass a Confirmer object around between each other.



#### `app/routes/index.js`



```js

import Route from '@ember/routing/route';



export default Route.extend({

  actions: {

    willTransition(transition) {

      let confirmer = this.controller.showDirtyConfirmation();

      if (confirmer) {

        transition.abort();

        confirmer.onConfirmed(() => transition.retry());

      }

    }

  }

});

```



#### `app/controllers/index.js`



```js

import Controller from '@ember/controller';

import Confirmer from 'confirmer';



export default Controller.extend({

  showDirtyConfirmation() {

    if (!this.get('model.hasDirtyAttributes')) { return; }

    return new Confirmer(resolver => {

      this.set('modalAction', resolver);

      this.set('showConfirmationModal', true);

    })

      .onConfirmed(() => this.get('model').rollbackAttributes())

      .onDone(() => this.set('showConfirmationModal', false));

  }

});

```



#### `app/templates/index.hbs`



```hbs

{{#if showConfirmationModal}}

  


    
You have unsaved changes. Are you sure wish to abandon them?




    No

    Yes

  




{{/if}}

```



### Example using ember-remodal



We have an `{{#ember-remodal-redux}}` component to handle the complexity of

using remodal as a component instead of a global/service. If this does not fit

your needs then you can still use remodal manually.



This is an example using the [ember-remodal addon](http://sethbrasile.github.io/ember-remodal/) on your own.



```js

import Controller from '@ember/controller';

import { inject as service } from '@ember/service';

import Confirmer from 'confirmer';



export default Controller.extend({

  remodal: service(),



  showConfirmationModal() {

    const remodal = this.get('remodal');

    let modalName = 'confirmation'; // Change as needed

    return new Confirmer(resolver => {

      this.set('modalResolver', resolver);

      let promise = remodal.open(modalName);

      resolver.dispose(() => {

        // https://github.com/sethbrasile/ember-remodal/issues/3

        return promise

          .then(() => {

            let modalState = tryInvoke(this.get('modal'), 'getState');

            // https://github.com/vodkabears/Remodal/issues/291

            if (modalState !== 'opened') { return; }

            return remodal.close(modalName);

          })

          .then(() => this.set('modalResolver', null));

      });

    });

  },



  actions: {

    resolveModal(method, value) {

      this.get('modalResolver')[method](value);

    }

  }

});

```



```hbs

{{#ember-remodal

    forService=true

    name="confirmation"

    onConfirm=(action "resolveModal" "confirm")

    onCancel=(action "resolveModal" "reject")

    onClose=(action "resolveModal" "cancel")

    as |modal|}}

  {{#modal.cancel}}Close{{/modal.cancel}}

  
Pick yes or no:


  {{#modal.cancel}}No{{/modal.cancel}}

  {{#modal.confirm}}Yes{{/modal.confirm}}

{{/ember-remodal}}

```



### Example using ember-sweetalert



This is an example of wrapping the [ember-sweetalert addon](https://github.com/Tonkpils/ember-sweetalert) in a Confirmer object.



```js

import Confirmer from 'confirmer';

import sweetAlert from 'ember-sweetalert';



export default function sweetAlertConfirmer(sweetAlertOptions) {

  return new Confirmer(resolver => {

    sweetAlert(sweetAlertOptions)

      .then(result => {

        if (result.dismiss) {

          resolver.cancel(result.dismiss);

        } else {

          resolver.confirm(result.value);

        }

      })

      .catch(resolver.error);

  });

}

```