open-consul/ui-v2/app/mixins/with-event-source.js

62 lines
2.3 KiB
JavaScript

import Mixin from '@ember/object/mixin';
import { set } from '@ember/object';
import { computed as catchable } from 'consul-ui/computed/catchable';
import purify from 'consul-ui/utils/computed/purify';
import WithListeners from 'consul-ui/mixins/with-listeners';
const PREFIX = '_';
export default Mixin.create(WithListeners, {
setProperties: function(model) {
const _model = {};
Object.keys(model).forEach(prop => {
// here (see comment below on deleting)
if (model[prop] && typeof model[prop].addEventListener === 'function') {
let meta;
// TODO: metaForProperty throws an error if the property is not
// computed-like, this is far from ideal but happy with this
// until we can find a better way in an ember post 2.18 world
// of finding out if a property is computed or not
// (or until we switch all this out for <DataSource /> compoments
try {
meta = this.constructor.metaForProperty(prop);
} catch (e) {
meta = {};
}
if (typeof meta.catch === 'function') {
_model[`${PREFIX}${prop}`] = model[prop];
this.listen(_model[`_${prop}`], 'error', meta.catch.bind(this));
} else {
_model[prop] = model[prop];
}
} else {
_model[prop] = model[prop];
}
});
return this._super(_model);
},
reset: function(exiting) {
Object.keys(this).forEach(prop => {
if (this[prop] && typeof this[prop].close === 'function') {
this[prop].willDestroy();
// ember doesn't delete on 'resetController' by default
// right now we only call reset when we are exiting, therefore a full
// setProperties will be called the next time we enter the Route so this
// is ok for what we need and means that the above conditional works
// as expected (see 'here' comment above)
// delete this[prop];
// TODO: Check that nulling this out instead of deleting is fine
// pretty sure it is as above is just a falsey check
set(this, prop, null);
}
});
return this._super(...arguments);
},
willDestroy: function() {
this.reset(true);
this._super(...arguments);
},
});
export const listen = purify(catchable, function(props) {
return props.map(item => `${PREFIX}${item}`);
});