47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
import Component from '@ember/component';
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import { computed } from '@ember/object';
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import { computed as overridable } from 'ember-overridable-computed';
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export default Component.extend({
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source: overridable(() => []),
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size: 25,
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page: 1,
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spread: 2,
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startsAt: computed('size', 'page', function() {
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return (this.page - 1) * this.size + 1;
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}),
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endsAt: computed('source.[]', 'size', 'page', function() {
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return Math.min(this.page * this.size, this.get('source.length'));
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}),
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lastPage: computed('source.[]', 'size', function() {
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return Math.ceil(this.get('source.length') / this.size);
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}),
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pageLinks: computed('source.[]', 'page', 'spread', function() {
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const { spread, page, lastPage } = this;
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// When there is only one page, don't bother with page links
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if (lastPage === 1) {
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return [];
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}
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const lowerBound = Math.max(1, page - spread);
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const upperBound = Math.min(lastPage, page + spread) + 1;
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return Array(upperBound - lowerBound)
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.fill(null)
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.map((_, index) => ({
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pageNumber: lowerBound + index,
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}));
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}),
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list: computed('source.[]', 'page', 'size', function() {
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const size = this.size;
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const start = (this.page - 1) * size;
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return this.source.slice(start, start + size);
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}),
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});
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