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import { translate } from 'i18n-calypso';
import { useCallback, useState } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import { getCurrentUserName } from 'calypso/state/current-user/selectors';
import {
addRecommendedBlogsSite as addFeedRecommendation,
removeRecommendedBlogsSite as removeFeedRecommendation,
} from 'calypso/state/reader/lists/actions';
import { getListByOwnerAndSlug, getMatchingItem } from 'calypso/state/reader/lists/selectors';
import type { ReaderList } from 'calypso/reader/list-manage/types';
import type { AppState } from 'calypso/types';
interface useFeedRecommendationsMutationResult {
isRecommended: boolean;
isUpdating: boolean;
canToggle: boolean;
toggleRecommended: () => void;
}
/**
* Custom hook for managing the feed recommendations state with optimistic updates
* @param feedId - The feed ID to add/remove from recommended feeds list
* @returns Object with recommendation state and toggle function
*/
export const useFeedRecommendationsMutation = (
feedId: number
): useFeedRecommendationsMutationResult => {
const dispatch = useDispatch();
const currentUserName = useSelector( getCurrentUserName );
// Get the recommended blogs list for the current user
const recommendedBlogsList = useSelector( ( state: AppState ) => {
if ( ! currentUserName ) {
return null;
}
return getListByOwnerAndSlug( state, currentUserName, 'recommended-blogs' ) as ReaderList;
} );
// Memoized selector to check if item is in recommended list
const selectIsInRecommendedList = useCallback(
( state: AppState ) => {
if ( ! currentUserName || ! recommendedBlogsList?.ID ) {
return false;
}
// Match by feedId only
const matchByFeedId = getMatchingItem( state, { listId: recommendedBlogsList.ID, feedId } );
return !! matchByFeedId;
},
[ currentUserName, recommendedBlogsList?.ID, feedId ]
);
// Get actual state from Redux (includes optimistic updates handled by reducer)
const isRecommended = useSelector( selectIsInRecommendedList );
// Local state for loading state only
const [ isUpdating, setIsUpdating ] = useState( false );
// Determine if toggle is available
const canToggle = Boolean(
currentUserName && typeof currentUserName === 'string' && recommendedBlogsList?.ID
);
// Toggle function - Redux reducer handles optimistic updates
const toggleRecommended = useCallback( () => {
if ( ! canToggle || isUpdating || ! recommendedBlogsList?.ID ) {
return;
}
const newValue = ! isRecommended;
setIsUpdating( true );
// Add a small delay before allowing the next toggle to prevent rapid toggling
setTimeout( () => setIsUpdating( false ), 300 );
if ( newValue ) {
dispatch(
addFeedRecommendation( recommendedBlogsList.ID, feedId, currentUserName as string, {
successMessage: translate( 'Site added to your recommended blogs.' ),
errorMessage: translate( 'Failed to add site to recommended blogs. Please try again.' ),
} )
);
} else {
dispatch(
removeFeedRecommendation( recommendedBlogsList.ID, feedId, currentUserName as string, {
successMessage: translate( 'Site removed from your recommended blogs.' ),
errorMessage: translate( 'Failed to remove site from recommended blogs.' ),
} )
);
}
}, [
canToggle,
isUpdating,
isRecommended,
feedId,
currentUserName,
recommendedBlogsList?.ID,
dispatch,
] );
return {
isRecommended,
isUpdating,
canToggle,
toggleRecommended,
};
};
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