PodTui/tasks/episode-infinite-scroll/11-paginated-episode-loading.md

11. Implement Paginated Episode Fetching

meta: id: episode-infinite-scroll-11 feature: episode-infinite-scroll priority: P2 depends_on: [episode-infinite-scroll-10] tags: [rss, pagination, data-fetching]

objective:

• Fetch episodes in chunks with MAX_EPISODES_REFRESH limit
• Merge new episodes with existing list
• Maintain episode ordering (newest first)

deliverables:

• Paginated episode fetch function
• Episode list merging logic
• Integration with feed store

steps:

1. Create paginated fetch function in feed store
2. Implement chunk-based episode fetching (50 episodes at a time)
3. Add logic to merge new episodes with existing list
4. Maintain reverse chronological order (newest first)
5. Deduplicate episodes by title or URL

tests:

• Unit: Test paginated fetch logic
• Integration: Test with real RSS feeds
• Edge case: Test with feeds having < 50 episodes

acceptance_criteria:

• Episodes fetched in chunks of MAX_EPISODES_REFRESH
• New episodes merged correctly with existing list
• Episode ordering maintained (newest first)

validation:

• Test with RSS feed having 100+ episodes
• Verify pagination works correctly
• Check episode ordering after merge

notes:

• Use existing MAX_EPISODES_REFRESH = 50 constant
• Add episode deduplication logic
• Preserve episode metadata during merge
• Handle cases where feed has fewer episodes