Filter out gacha entries with no items at the query level (EXISTS
subquery) and reorder Play methods to validate the pool before
calling transact(), so players are never charged for a misconfigured
gacha.
getRandomEntries panics with rand.Intn(0) when box gacha has more rolls
than available entries. Fix by clamping rolls, guarding empty entries
and zero-weight pools, and fixing an out-of-bounds slice in the receive
handler overflow path.
Move payment processing, reward selection, stepup state management,
and box gacha tracking from handlers into a dedicated service layer.
Handlers now delegate to GachaService methods and only handle
protocol serialization.
Cover critical paths that previously had no test coverage:
- Session: login success/error paths, ping, logkey, record log,
global sema lock/unlock, rights reload, announce
- Gacha: point queries, coin deduction, item receive with overflow
and freeze, normal/stepup/box gacha play, stepup status lifecycle,
weighted random selection
- Shop: enumeration across all shop types, exchange purchases,
fpoint-to-item and item-to-fpoint exchange, fpoint exchange list
with Z2 vs ZZ encoding
- Plate: load/save for platedata, platebox, platemyset with
oversized payload rejection, diff path, and cache invalidation
Add mockSessionRepo, mockGachaRepo, mockShopRepo, and
mockUserRepoGacha to support the new test scenarios. Add
loadColumnErr field to mockCharacterRepo for diff-path error
testing.
