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<script>
const PAGINATION_UI_BUTTON_LIMIT = 4;
const UI_LIMIT = 6;
const SPREAD = '...';
const PREV = 'Prev';
const NEXT = 'Next';
const FIRST = '« First';
const LAST = 'Last »';
export default {
props: {
/**
This function will take the information given by the pagination component
Here is an example `change` method:
change(pagenum) {
gl.utils.visitUrl(`?page=${pagenum}`);
},
*/
change: {
type: Function,
required: true,
},
/**
pageInfo will come from the headers of the API call
in the `.then` clause of the VueResource API call
there should be a function that contructs the pageInfo for this component
This is an example:
const pageInfo = headers => ({
perPage: +headers['X-Per-Page'],
page: +headers['X-Page'],
total: +headers['X-Total'],
totalPages: +headers['X-Total-Pages'],
nextPage: +headers['X-Next-Page'],
previousPage: +headers['X-Prev-Page'],
});
*/
pageInfo: {
type: Object,
required: true,
},
},
methods: {
changePage(e) {
const text = e.target.innerText;
const { totalPages, nextPage, previousPage } = this.pageInfo;
switch (text) {
case SPREAD:
break;
case LAST:
this.change(totalPages);
break;
case NEXT:
this.change(nextPage);
break;
case PREV:
this.change(previousPage);
break;
case FIRST:
this.change(1);
break;
default:
this.change(+text);
break;
}
},
},
computed: {
prev() {
return this.pageInfo.previousPage;
},
next() {
return this.pageInfo.nextPage;
},
getItems() {
const total = this.pageInfo.totalPages;
const page = this.pageInfo.page;
const items = [];
if (page > 1) items.push({ title: FIRST });
if (page > 1) {
items.push({ title: PREV, prev: true });
} else {
items.push({ title: PREV, disabled: true, prev: true });
}
if (page > UI_LIMIT) items.push({ title: SPREAD, separator: true });
const start = Math.max(page - PAGINATION_UI_BUTTON_LIMIT, 1);
const end = Math.min(page + PAGINATION_UI_BUTTON_LIMIT, total);
for (let i = start; i <= end; i += 1) {
const isActive = i === page;
items.push({ title: i, active: isActive, page: true });
}
if (total - page > PAGINATION_UI_BUTTON_LIMIT) {
items.push({ title: SPREAD, separator: true, page: true });
}
if (page === total) {
items.push({ title: NEXT, disabled: true, next: true });
} else if (total - page >= 1) {
items.push({ title: NEXT, next: true });
}
if (total - page >= 1) items.push({ title: LAST, last: true });
return items;
},
},
};
</script>
<template>
<div class="gl-pagination">
<ul class="pagination clearfix">
<li
v-for="item in getItems"
:class="{
page: item.page,
prev: item.prev,
next: item.next,
separator: item.separator,
active: item.active,
disabled: item.disabled
}">
<a @click="changePage($event)">{{item.title}}</a>
</li>
</ul>
</div>
</template>
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