Issue 7: Offline-First Local Cache Management Engine Using IndexedDB - #28
Merged
elizabetheonoja-art merged 1 commit intoJun 17, 2026
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- Offline queue store (DB v2) when navigator.onLine === false - replayOfflineQueue() with exponential backoff (1s-60s, max 5 retries) - cacheSetBulk() with requestAnimationFrame batching - useOnlineStatus hook for online/offline detection
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Closes #7
Summary
Implements a full offline-first cache management engine on top of the existing IndexedDB layer, enabling field engineers to operate utility meters in areas with intermittent or no connectivity.
Changes
\src/services/cache.ts\
avigator.onLine === false, \cacheSet\ enqueues mutations instead of writing directly
eplayOfflineQueue()**: on reconnect, replays queued writes in FIFO order with exponential backoff (1s, 5s, 15s, 30s, 60s) and max 5 retries
equestAnimationFrame\ for efficient bulk mutations
\src/hooks/useOnlineStatus.ts\
avigator.onLine\ state via \online/\offline\ events
eplayOfflineQueue()\ when coming back online
Verification
px tsc --noEmit) passes