Fix unloaded postbox voiding packages #8553
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There seems to be an area of chunks where `Level.isLoaded` returns `false`, but `PostboxBlockEntity.onChunkUnloaded` has not yet been called. Any trains delivering to that area will use the offline buffer, but when the block entity is eventually unloaded, it will overwrite the delivered packages with an older version of the inventory, causing them to be lost. I made the following changes to fix this: - Sync the offline buffer whenever the inventory changes, rather than in `onChunkUnloaded`. - Fix `StationBlockEntity.attachPackagePort` incorrectly replacing `GlobalPackagePort` instances with new ones, resetting their data. - During mail transfer, get the `Level` from `ServerLifecycleHooks` rather than `CarriageContraptionEntity`: this ensures a loaded postbox will always be discovered, regardless of whether the train itself is loaded. Fixes Creators-of-Create#7491
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There seems to be an area of chunks where
Level.isLoadedreturnsfalse, butPostboxBlockEntity.onChunkUnloadedhas not yet been called. Any trains delivering to that area will use the offline buffer, but when the block entity is eventually unloaded, it will overwrite the delivered packages with an older version of the inventory, causing them to be lost.I made the following changes to fix this:
onChunkUnloaded.StationBlockEntity.attachPackagePortincorrectly replacingGlobalPackagePortinstances with new ones, resetting their data.LevelfromServerLifecycleHooksrather thanCarriageContraptionEntity: this ensures a loaded postbox will always be discovered, regardless of whether the train itself is loaded.Fixes #7491 (see my comment there for how to reproduce the bug)