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import ReactDOM from "react-dom"
import { fetchText, isMobile } from "../../clientUtils/Util"
import { isPresent } from "../../clientUtils/isPresent"
import { GRAPHER_EMBEDDED_FIGURE_ATTR } from "../../grapher/core/GrapherConstants"
import { deserializeJSONFromHTML } from "../../clientUtils/serializers"
import {
Grapher,
GrapherProgrammaticInterface,
} from "../../grapher/core/Grapher"
import { Explorer, ExplorerProps } from "../../explorer/Explorer"
import {
EMBEDDED_EXPLORER_DELIMITER,
EMBEDDED_EXPLORER_GRAPHER_CONFIGS,
EXPLORER_EMBEDDED_FIGURE_SELECTOR,
} from "../../explorer/ExplorerConstants"
import {
GLOBAL_ENTITY_SELECTOR_DEFAULT_COUNTRY,
GLOBAL_ENTITY_SELECTOR_ELEMENT,
} from "../../grapher/controls/globalEntitySelector/GlobalEntitySelectorConstants"
import { getWindowUrl, Url } from "../../clientUtils/urls/Url"
import { SelectionArray } from "../../grapher/selection/SelectionArray"
import {
getSelectedEntityNamesParam,
migrateSelectedEntityNamesParam,
} from "../../grapher/core/EntityUrlBuilder"
import { hydrateGlobalEntitySelectorIfAny } from "../../grapher/controls/globalEntitySelector/GlobalEntitySelector"
import { action } from "mobx"
import { Annotation } from "../../clientUtils/owidTypes"
import { hydrateAnnotatingDataValue } from "../AnnotatingDataValue"
const figuresFromDOM = (
container: HTMLElement | Document = document,
selector: string
) =>
Array.from(
container.querySelectorAll<HTMLElement>(`*[${selector}]`)
).filter(isPresent)
// Determine whether this device is powerful enough to handle
// loading a bunch of inline interactive charts
// 680px is also used in CSS – keep it in sync if you change this
export const shouldProgressiveEmbed = () =>
!isMobile() ||
window.screen.width > 680 ||
pageContainsGlobalEntitySelector()
const pageContainsGlobalEntitySelector = () =>
globalEntitySelectorElement() !== null
const globalEntitySelectorElement = () =>
document.querySelector(GLOBAL_ENTITY_SELECTOR_ELEMENT)
class MultiEmbedder {
private figuresObserver: IntersectionObserver | undefined
selection: SelectionArray = new SelectionArray()
graphersAndExplorersToUpdate: Set<SelectionArray> = new Set()
constructor() {
if (typeof window !== "undefined" && "IntersectionObserver" in window) {
this.figuresObserver = new IntersectionObserver(
this.onIntersecting.bind(this),
{
rootMargin: "200%",
}
)
} else {
console.warn(
"IntersectionObserver not available; interactive embeds won't load on this page"
)
}
}
/**
* Finds all <figure data-grapher-src="..."> and <figure
* data-explorer-src="..."> elements in the document and loads the
* iframeless interactive charts when the user's viewport approaches them.
* Uses an IntersectionObserver (see constructor).
*
* BEWARE: this method is hardcoded in some scripts, make sure to check
* thoroughly before making any changes.
*/
embedAll() {
this.observeFigures()
}
/**
* Make the embedder aware of new <figure> elements that are injected into the DOM.
*
* Use this when you programmatically create/replace charts.
*/
observeFigures(container: HTMLElement | Document = document) {
const figures = figuresFromDOM(
container,
GRAPHER_EMBEDDED_FIGURE_ATTR
).concat(figuresFromDOM(container, EXPLORER_EMBEDDED_FIGURE_SELECTOR))
figures.forEach((figure) => {
this.figuresObserver?.observe(figure)
})
}
async onIntersecting(entries: IntersectionObserverEntry[]) {
entries.forEach((entry) => {
if (entry.isIntersecting) {
this.renderInteractiveFigure(entry.target)
}
})
}
@action.bound
async renderInteractiveFigure(figure: Element, annotation?: Annotation) {
const isExplorer = figure.hasAttribute(
EXPLORER_EMBEDDED_FIGURE_SELECTOR
)
const dataSrc = figure.getAttribute(
isExplorer
? EXPLORER_EMBEDDED_FIGURE_SELECTOR
: GRAPHER_EMBEDDED_FIGURE_ATTR
)
if (!dataSrc) return
const hasPreview = isExplorer ? false : !!figure.querySelector("img")
if (!shouldProgressiveEmbed() && hasPreview) return
// Stop observing visibility as soon as possible, that is not before
// shouldProgressiveEmbed gets a chance to reevaluate a possible change
// in screen size on mobile (i.e. after a rotation). Stopping before
// shouldProgressiveEmbed would prevent rendering interactive charts
// when going from portrait to landscape mode (without page reload).
this.figuresObserver?.unobserve(figure)
const { fullUrl, queryStr } = Url.fromURL(dataSrc)
const common: GrapherProgrammaticInterface = {
isEmbeddedInAnOwidPage: true,
queryStr,
}
const html = await fetchText(fullUrl)
if (isExplorer) {
const props: ExplorerProps = {
...common,
...deserializeJSONFromHTML(html, EMBEDDED_EXPLORER_DELIMITER),
grapherConfigs: deserializeJSONFromHTML(
html,
EMBEDDED_EXPLORER_GRAPHER_CONFIGS
),
queryStr,
selection: new SelectionArray(
this.selection.selectedEntityNames
),
}
if (props.selection)
this.graphersAndExplorersToUpdate.add(props.selection)
ReactDOM.render(<Explorer {...props} />, figure)
} else {
figure.classList.remove("grapherPreview")
const config: GrapherProgrammaticInterface = {
...deserializeJSONFromHTML(html),
...common,
manager: {
selection: new SelectionArray(
this.selection.selectedEntityNames
),
},
annotation,
}
if (config.manager?.selection)
this.graphersAndExplorersToUpdate.add(config.manager.selection)
const grapherInstance = Grapher.renderGrapherIntoContainer(
config,
figure
)
if (!grapherInstance) return
hydrateAnnotatingDataValue(grapherInstance, figure)
}
}
setUpGlobalEntitySelectorForEmbeds() {
const element = globalEntitySelectorElement()
if (!element) return
const embeddedDefaultCountriesParam = element.getAttribute(
GLOBAL_ENTITY_SELECTOR_DEFAULT_COUNTRY
)
const [defaultEntityNames, windowEntityNames] = [
Url.fromQueryParams({
country: embeddedDefaultCountriesParam || undefined,
}),
getWindowUrl(),
]
.map(migrateSelectedEntityNamesParam)
.map(getSelectedEntityNamesParam)
this.selection = new SelectionArray(
windowEntityNames ?? defaultEntityNames
)
hydrateGlobalEntitySelectorIfAny(
this.selection,
this.graphersAndExplorersToUpdate
)
}
}
export const MultiEmbedderSingleton = new MultiEmbedder()
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