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onInput.ts
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onInput.ts
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import {
InternalAutocompleteOptions,
AutocompleteSetters,
AutocompleteState,
AutocompleteStore,
AutocompleteRefresh,
} from './types';
import { getHighlightedItem } from './utils';
let lastStalledId: number | null = null;
interface OnInputParams<TItem> extends AutocompleteSetters<TItem> {
query: string;
event: any;
store: AutocompleteStore<TItem>;
props: InternalAutocompleteOptions<TItem>;
/**
* The next partial state to apply after the function is called.
*
* This is useful when we call `onInput` in a different scenario than an
* actual input. For example, we use `onInput` when we click on an item,
* but we want to close the dropdown in that case.
*/
nextState?: Partial<AutocompleteState<TItem>>;
refresh: AutocompleteRefresh;
}
export function onInput<TItem>({
query,
event,
store,
props,
setHighlightedIndex,
setQuery,
setSuggestions,
setIsOpen,
setStatus,
setContext,
nextState = {},
refresh,
}: OnInputParams<TItem>): Promise<void> {
if (props.onInput) {
return Promise.resolve(
props.onInput({
query,
state: store.getState(),
setHighlightedIndex,
setQuery,
setSuggestions,
setIsOpen,
setStatus,
setContext,
refresh,
})
);
}
if (lastStalledId) {
clearTimeout(lastStalledId);
}
setQuery(query);
setHighlightedIndex(props.defaultHighlightedIndex);
if (query.length === 0 && props.openOnFocus === false) {
setStatus('idle');
setSuggestions(
store.getState().suggestions.map((suggestion) => ({
...suggestion,
items: [],
}))
);
setIsOpen(
nextState.isOpen ?? props.shouldDropdownShow({ state: store.getState() })
);
return Promise.resolve();
}
setStatus('loading');
lastStalledId = props.environment.setTimeout(() => {
setStatus('stalled');
}, props.stallThreshold);
return props
.getSources({
query,
state: store.getState(),
setHighlightedIndex,
setQuery,
setSuggestions,
setIsOpen,
setStatus,
setContext,
refresh,
})
.then((sources) => {
setStatus('loading');
// @TODO: convert `Promise.all` to fetching strategy.
return Promise.all(
sources.map((source) => {
return Promise.resolve(
source.getSuggestions({
query,
state: store.getState(),
setHighlightedIndex,
setQuery,
setSuggestions,
setIsOpen,
setStatus,
setContext,
refresh,
})
).then((items) => {
return {
source,
items,
};
});
})
)
.then((suggestions) => {
setStatus('idle');
setSuggestions(suggestions as any);
setIsOpen(
nextState.isOpen ??
((query.length === 0 && props.openOnFocus) ||
props.shouldDropdownShow({ state: store.getState() }))
);
const highlightedItem = getHighlightedItem({
state: store.getState(),
});
if (store.getState().highlightedIndex !== null && highlightedItem) {
const { item, itemValue, itemUrl, source } = highlightedItem;
source.onHighlight({
suggestion: item,
suggestionValue: itemValue,
suggestionUrl: itemUrl,
source,
state: store.getState(),
setHighlightedIndex,
setQuery,
setSuggestions,
setIsOpen,
setStatus,
setContext,
event,
});
}
})
.catch((error) => {
setStatus('error');
throw error;
})
.finally(() => {
if (lastStalledId) {
clearTimeout(lastStalledId);
}
});
});
}