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import { normalizeNewsletterFilter } from '@common/utils/newsletterUtils';
import { useCallback, useMemo } from 'react';
import { useLocation } from 'react-router-dom';
import type { NewsletterFilter, NewsletterWithRelations } from '../types';
import { useInfiniteNewsletters } from './infiniteScroll';
import { useInboxFilters } from './useInboxFilters';
import { useReadingQueue } from './useReadingQueue';
export interface NewsletterNavigationState {
currentNewsletter: NewsletterWithRelations | null;
previousNewsletter: NewsletterWithRelations | null;
nextNewsletter: NewsletterWithRelations | null;
currentIndex: number;
totalCount: number;
hasPrevious: boolean;
hasNext: boolean;
isLoading: boolean;
}
export interface NewsletterNavigationActions {
navigateToPrevious: () => string | null;
navigateToNext: () => string | null;
preloadAdjacent: () => void;
}
export interface UseNewsletterNavigationOptions {
enabled?: boolean;
preloadAdjacent?: boolean;
debug?: boolean;
/** Override context detection and use specific filter */
overrideFilter?: NewsletterFilter;
/** Force use of reading queue context */
forceReadingQueue?: boolean;
/** Force use of specific source filter */
forceSourceFilter?: string;
}
export interface UseNewsletterNavigationReturn
extends NewsletterNavigationState,
NewsletterNavigationActions { }
/**
* Custom hook for newsletter navigation functionality
* Provides next/previous navigation within the current context
* Respects current view (inbox, reading queue, source) filters and maintains navigation state
*/
export const useNewsletterNavigation = (
currentNewsletterId: string | null,
options: UseNewsletterNavigationOptions = {}
): UseNewsletterNavigationReturn => {
const log = useLogger('useNewsletterNavigation');
const location = useLocation();
const {
enabled = false,
preloadAdjacent = true,
debug = false,
overrideFilter,
forceReadingQueue = false,
forceSourceFilter,
} = options;
// Get current inbox filters and reading queue
const { newsletterFilter } = useInboxFilters();
const { readingQueue = [] } = useReadingQueue() || {};
// Determine the context and build appropriate filter
const contextualFilter: NewsletterFilter = useMemo(() => {
// Use override filter if provided
if (overrideFilter) {
console.log('🔍 DEBUG: useNewsletterNavigation using overrideFilter', {
overrideFilter,
currentNewsletterId,
});
return {
...overrideFilter,
orderBy: 'received_at',
ascending: false,
};
}
// Detect context from URL and options
const isReadingQueueContext =
forceReadingQueue ||
location.pathname.includes('/reading-queue') ||
location.pathname.includes('/queue');
const isNewsletterSourceContext =
forceSourceFilter ||
location.pathname.includes('/sources/') ||
location.search.includes('source=');
if (isReadingQueueContext) {
// For reading queue, we don't use the regular filter system
// Instead we'll use the reading queue data directly
return {
is_read: undefined,
search: 'reading_queue',
order_by: 'received_at',
ascending: false,
} as NewsletterFilter;
}
if (isNewsletterSourceContext) {
// Extract source from URL or use forced source
const sourceId =
forceSourceFilter ||
new URLSearchParams(location.search).get('source') ||
location.pathname.split('/sources/')[1]?.split('/')[0];
if (sourceId) {
return {
...newsletterFilter,
source_id: sourceId,
order_by: 'received_at',
ascending: false,
};
}
}
// Default to current inbox filters
console.log('🔍 DEBUG: useNewsletterNavigation using default newsletterFilter', {
newsletterFilter,
currentNewsletterId,
});
return {
...newsletterFilter,
order_by: 'received_at',
ascending: false,
};
}, [
overrideFilter,
forceReadingQueue,
forceSourceFilter,
location.pathname,
location.search,
newsletterFilter,
]);
// Normalize contextualFilter before passing to useInfiniteNewsletters
const normalizedContextualFilter = useMemo(() => normalizeNewsletterFilter(contextualFilter), [contextualFilter]);
// Handle reading queue context separately
const isUsingReadingQueue = contextualFilter.search === 'reading_queue';
// For reading queue, use the queue data directly
const readingQueueNewsletters = useMemo(() => {
if (!isUsingReadingQueue) return [];
return readingQueue.map((item) => item.newsletter).filter(Boolean);
}, [isUsingReadingQueue, readingQueue]);
// Fetch newsletters using normalized contextual filters (skip if using reading queue)
const {
newsletters: fetchedNewsletters,
isLoading,
totalCount,
hasNextPage,
fetchNextPage,
isFetchingNextPage,
} = useInfiniteNewsletters(normalizedContextualFilter, {
enabled: enabled && !!currentNewsletterId && !isUsingReadingQueue &&
(window.location.pathname.includes('/newsletters/') &&
window.location.pathname.split('/').length > 2),
pageSize: 50, // Larger page size for better navigation experience
debug,
});
// Use appropriate newsletter list based on context
const newsletters = useMemo(() => {
return isUsingReadingQueue ? readingQueueNewsletters : fetchedNewsletters;
}, [isUsingReadingQueue, readingQueueNewsletters, fetchedNewsletters]);
const contextTotalCount = useMemo(() => {
return isUsingReadingQueue ? readingQueue.length : totalCount;
}, [isUsingReadingQueue, readingQueue.length, totalCount]);
// Find current newsletter and its position
const navigationState = useMemo(() => {
if (!currentNewsletterId || !newsletters.length) {
return {
currentNewsletter: null,
currentIndex: -1,
previousNewsletter: null,
nextNewsletter: null,
};
}
const currentIndex = newsletters.findIndex((n) => n.id === currentNewsletterId);
if (currentIndex === -1) {
if (debug) {
log.debug('Current newsletter not found in list', {
action: 'find_current_newsletter',
metadata: {
currentNewsletterId,
newslettersCount: newsletters.length,
firstFewIds: newsletters.slice(0, 5).map((n) => n.id),
},
});
}
return {
currentNewsletter: null,
currentIndex: -1,
previousNewsletter: null,
nextNewsletter: null,
};
}
const currentNewsletter = newsletters[currentIndex];
const previousNewsletter = currentIndex > 0 ? newsletters[currentIndex - 1] : null;
const nextNewsletter =
currentIndex < newsletters.length - 1 ? newsletters[currentIndex + 1] : null;
if (debug) {
log.debug('Navigation state calculated', {
action: 'calculate_navigation_state',
metadata: {
currentIndex,
totalNewsletters: newsletters.length,
hasPrevious: !!previousNewsletter,
hasNext: !!nextNewsletter,
previousId: previousNewsletter?.id,
nextId: nextNewsletter?.id,
context: isUsingReadingQueue ? 'reading_queue' : 'filtered_inbox',
contextFilter: contextualFilter,
},
});
}
return {
currentNewsletter,
currentIndex,
previousNewsletter,
nextNewsletter,
};
}, [currentNewsletterId, newsletters, debug, log]);
// Check if we need to fetch more pages for navigation (only for non-reading-queue contexts)
const needsMoreData = useMemo(() => {
if (isUsingReadingQueue) return false; // Reading queue is already fully loaded
const { currentIndex } = navigationState;
if (currentIndex === -1) return false;
// If we're near the end and there are more pages, we should fetch
const isNearEnd = currentIndex >= newsletters.length - 5;
return isNearEnd && hasNextPage && !isFetchingNextPage;
}, [isUsingReadingQueue, navigationState, newsletters.length, hasNextPage, isFetchingNextPage]);
// Auto-fetch more data when needed (only for non-reading-queue contexts)
const preloadAdjacentNewsletters = useCallback(() => {
if (needsMoreData && preloadAdjacent && !isUsingReadingQueue) {
if (debug) {
log.debug('Preloading adjacent newsletters', {
action: 'preload_adjacent',
metadata: {
currentIndex: navigationState.currentIndex,
totalLoaded: newsletters.length,
hasNextPage,
context: 'filtered_inbox',
},
});
}
fetchNextPage();
}
}, [
needsMoreData,
preloadAdjacent,
isUsingReadingQueue,
fetchNextPage,
debug,
log,
navigationState.currentIndex,
newsletters.length,
hasNextPage,
]);
// Navigation functions
const navigateToPrevious = useCallback((): string | null => {
const { previousNewsletter } = navigationState;
if (!previousNewsletter) {
if (debug) {
log.debug('No previous newsletter available', {
action: 'navigate_previous',
metadata: { currentIndex: navigationState.currentIndex },
});
}
return null;
}
if (debug) {
log.debug('Navigating to previous newsletter', {
action: 'navigate_previous',
metadata: {
fromId: currentNewsletterId,
toId: previousNewsletter.id,
currentIndex: navigationState.currentIndex,
},
});
}
return previousNewsletter.id;
}, [navigationState, currentNewsletterId, debug, log]);
const navigateToNext = useCallback((): string | null => {
const { nextNewsletter, currentIndex } = navigationState;
// For reading queue, no need to fetch more pages
if (isUsingReadingQueue) {
if (!nextNewsletter) {
if (debug) {
log.debug('No next newsletter available in reading queue', {
action: 'navigate_next',
metadata: {
currentIndex: navigationState.currentIndex,
totalInQueue: readingQueue.length,
},
});
}
return null;
}
if (debug) {
log.debug('Navigating to next newsletter in reading queue', {
action: 'navigate_next',
metadata: {
fromId: currentNewsletterId,
toId: nextNewsletter.id,
currentIndex: navigationState.currentIndex,
},
});
}
return nextNewsletter.id;
}
// For filtered inbox, try to fetch more if needed
if (!nextNewsletter && hasNextPage && !isFetchingNextPage) {
if (debug) {
log.debug('Fetching next page for navigation', {
action: 'navigate_next_fetch',
metadata: { currentIndex, totalLoaded: newsletters.length },
});
}
fetchNextPage();
return null; // User will need to try again after fetch
}
if (!nextNewsletter) {
if (debug) {
log.debug('No next newsletter available', {
action: 'navigate_next',
metadata: {
currentIndex: navigationState.currentIndex,
hasNextPage,
isFetchingNextPage,
},
});
}
return null;
}
if (debug) {
log.debug('Navigating to next newsletter', {
action: 'navigate_next',
metadata: {
fromId: currentNewsletterId,
toId: nextNewsletter.id,
currentIndex: navigationState.currentIndex,
},
});
}
return nextNewsletter.id;
}, [
navigationState,
currentNewsletterId,
isUsingReadingQueue,
readingQueue.length,
hasNextPage,
isFetchingNextPage,
fetchNextPage,
debug,
log,
newsletters.length,
]);
// Determine navigation availability
const hasPrevious = navigationState.currentIndex > 0;
const hasNext = useMemo(() => {
const { currentIndex } = navigationState;
if (currentIndex === -1) return false;
// For reading queue, only check current data
if (isUsingReadingQueue) {
return currentIndex < newsletters.length - 1;
}
// For filtered inbox, has next if there's a next newsletter in current data OR more pages to fetch
return currentIndex < newsletters.length - 1 || hasNextPage;
}, [navigationState, newsletters.length, hasNextPage, isUsingReadingQueue]);
// Auto-preload when position changes
if (enabled && preloadAdjacent) {
preloadAdjacentNewsletters();
}
return {
// State
currentNewsletter: navigationState.currentNewsletter,
previousNewsletter: navigationState.previousNewsletter,
nextNewsletter: navigationState.nextNewsletter,
currentIndex: navigationState.currentIndex,
totalCount: contextTotalCount,
hasPrevious,
hasNext,
isLoading: isUsingReadingQueue ? false : isLoading || isFetchingNextPage,
// Actions
navigateToPrevious,
navigateToNext,
preloadAdjacent: preloadAdjacentNewsletters,
};
};
/**
* Hook variant that provides only navigation state without actions
* Useful for read-only navigation information
*/
export const useNewsletterNavigationState = (
currentNewsletterId: string | null,
options: UseNewsletterNavigationOptions = {}
): NewsletterNavigationState => {
const navigation = useNewsletterNavigation(currentNewsletterId, options);
return {
currentNewsletter: navigation.currentNewsletter,
previousNewsletter: navigation.previousNewsletter,
nextNewsletter: navigation.nextNewsletter,
currentIndex: navigation.currentIndex,
totalCount: navigation.totalCount,
hasPrevious: navigation.hasPrevious,
hasNext: navigation.hasNext,
isLoading: navigation.isLoading,
};
};
/**
* Hook variant that provides only navigation actions
* Useful when you only need the navigation functions
*/
export const useNewsletterNavigationActions = (
currentNewsletterId: string | null,
options: UseNewsletterNavigationOptions = {}
): NewsletterNavigationActions => {
const navigation = useNewsletterNavigation(currentNewsletterId, options);
return {
navigateToPrevious: navigation.navigateToPrevious,
navigateToNext: navigation.navigateToNext,
preloadAdjacent: navigation.preloadAdjacent,
};
};
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