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|
// eslint-disable-next-line no-unused
import { h } from 'vue'
import isEmpty from 'lodash/isEmpty'
import { getComponentProps } from '../../services/component_utils/component_utils'
import './with_load_more.scss'
import { FontAwesomeIcon as FAIcon } from '@fortawesome/vue-fontawesome'
import { library } from '@fortawesome/fontawesome-svg-core'
import {
faCircleNotch
} from '@fortawesome/free-solid-svg-icons'
library.add(
faCircleNotch
)
const withLoadMore = ({
fetch, // function to fetch entries and return a promise
select, // function to select data from store
unmounted, // function called at "destroyed" lifecycle
childPropName = 'entries', // name of the prop to be passed into the wrapped component
additionalPropNames = [] // additional prop name list of the wrapper component
}) => (WrappedComponent) => {
const originalProps = Object.keys(getComponentProps(WrappedComponent))
const props = originalProps.filter(v => v !== childPropName).concat(additionalPropNames)
return {
props,
data () {
return {
loading: false,
bottomedOut: false,
error: false,
entries: []
}
},
created () {
window.addEventListener('scroll', this.scrollLoad)
if (this.entries.length === 0) {
this.fetchEntries()
}
},
unmounted () {
window.removeEventListener('scroll', this.scrollLoad)
unmounted && unmounted(this.$props, this.$store)
},
methods: {
// Entries is not a computed because computed can't track the dynamic
// selector for changes and won't trigger after fetch.
updateEntries () {
this.entries = select(this.$props, this.$store) || []
},
fetchEntries () {
if (!this.loading) {
this.loading = true
this.error = false
fetch(this.$props, this.$store)
.then((newEntries) => {
this.loading = false
this.bottomedOut = isEmpty(newEntries)
})
.catch(() => {
this.loading = false
this.error = true
})
.finally(() => {
this.updateEntries()
})
}
},
scrollLoad (e) {
const bodyBRect = document.body.getBoundingClientRect()
const height = Math.max(bodyBRect.height, -(bodyBRect.y))
if (this.loading === false &&
this.bottomedOut === false &&
this.$el.offsetHeight > 0 &&
(window.innerHeight + window.pageYOffset) >= (height - 750)
) {
this.fetchEntries()
}
}
},
render () {
const props = {
...this.$props,
[childPropName]: this.entries
}
const children = this.$slots
return (
<div class="with-load-more">
<WrappedComponent {...props}>
{children}
</WrappedComponent>
<div class="with-load-more-footer">
{this.error &&
<button onClick={this.fetchEntries} class="button-unstyled -link -fullwidth alert error">
{this.$t('general.generic_error')}
</button>
}
{!this.error && this.loading && <FAIcon spin icon="circle-notch"/>}
{!this.error && !this.loading && !this.bottomedOut && <a onClick={this.fetchEntries} role="button" tabindex="0">{this.$t('general.more')}</a>}
</div>
</div>
)
}
}
}
export default withLoadMore
|
