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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | 1x 1x 1x 1x 1x 1x 1x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x | import React from "react"
import { SubNavId } from "../../clientUtils/owidTypes"
import { getSubnavItem, SubnavItem, subnavs } from "../SiteSubnavigation"
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome"
import { faAngleRight } from "@fortawesome/free-solid-svg-icons/faAngleRight"
export const getSubnavParent = (
currentItem: SubnavItem | undefined,
subnavItems: SubnavItem[]
) => {
const parentId = currentItem?.parentId
// We want to avoid matching elements with potentially undefined id.
// Static typing prevents id from being undefined but this might not be
// the case in a future API powered version.
return parentId
? subnavItems.find((item) => item.id === parentId)
: undefined
}
export const getBreadcrumbItems = (
subnavCurrentId: string | undefined,
subnavItems: SubnavItem[]
): SubnavItem[] | undefined => {
const breadcrumb = []
let currentItem = getSubnavItem(subnavCurrentId, subnavItems)
if (!currentItem) return
breadcrumb.push(currentItem)
while (currentItem && currentItem.parentId) {
currentItem = getSubnavParent(currentItem, subnavItems)
if (currentItem) breadcrumb.push(currentItem)
}
if (currentItem !== subnavItems[0]) breadcrumb.push(subnavItems[0]) // add topic as parent
return breadcrumb.reverse()
}
const BreadcrumbSeparator = () => (
<span className="separator">
<FontAwesomeIcon icon={faAngleRight} />
</span>
)
export const Breadcrumb = ({
subnavId,
subnavCurrentId,
}: {
subnavId?: SubNavId
subnavCurrentId?: string
}) => {
const breadcrumbItems = subnavId
? getBreadcrumbItems(subnavCurrentId, subnavs[subnavId])
: null
return breadcrumbItems ? (
<div className="breadcrumb">
<a href="/">Home</a>
<BreadcrumbSeparator />
{breadcrumbItems.map((item, idx) => (
<React.Fragment key={item.href}>
{idx !== breadcrumbItems.length - 1 ? (
<>
<a data-track-note="breadcrumb" href={item.href}>
{item.label}
</a>
<BreadcrumbSeparator />
</>
) : (
<span>{item.label}</span>
)}
</React.Fragment>
))}
</div>
) : null
}
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