Refactor Stall Interaction and Optimize Placement Validation - #168
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- Extracted special mode and stall build/selection logic from onCellClick into specialized handler methods. - Optimized validateStallPlacement to avoid redundant A* pathfinding for enemies whose paths are not intersected by new stalls. - Improved atomicity of sellStall and undoSell by moving hex map and validation logic into _gameState.update blocks. - Streamlined Tray Return Uncle rule check using idiomatic Kotlin. - Updated fixes.md with REF-013 and marked REF-012 as Resolved. Co-authored-by: candour <4670475+candour@users.noreply.github.com>
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📝 WalkthroughWalkthrough
ChangesStall Placement Validation and Interaction Refactoring
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Possibly related PRs
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Actionable comments posted: 1
🧹 Nitpick comments (1)
app/src/main/java/com/messark/hawker/MainViewModel.kt (1)
1111-1134: 💤 Low valueConsider moving validation inside
_gameState.updatefor consistency.
handleBuildStallperforms gold validation andvalidateStallPlacementchecks againstcurrentStatecaptured outside the update block, then applies modifications usingstateinside. This creates a potential TOCTOU window and is inconsistent with the atomic pattern applied tosellStallandundoSell.On single-threaded Compose UI this is unlikely to cause issues, but aligning all stall operations to the same atomic pattern would improve consistency.
♻️ Suggested refactor to match sellStall/undoSell pattern
private fun handleBuildStall(coord: AxialCoordinate, tile: HexTile, currentState: GameState) { - val stallToPlace = currentState.selectedStallType ?: return - if (currentState.gold >= stallToPlace.cost && (tile.type == TileType.FLOOR || tile.type == TileType.DRAIN)) { - val blocked = validateStallPlacement(coord, stallToPlace, currentState) - - if (blocked != null) { - val newHexes = currentState.hexes.toMutableMap() - newHexes[coord] = tile.copy( - stall = stallToPlace.copy(id = UUID.randomUUID().toString()), - isPermanentlyWet = false - ) - - _gameState.update { state -> - val updatedEnemies = recalculateEnemyPaths(state, blocked, newHexes) - state.copy( - hexes = newHexes, - gold = state.gold - stallToPlace.cost, - enemies = updatedEnemies, - lastSoldStall = null - ) - } - } - } + _gameState.update { state -> + val stallToPlace = state.selectedStallType ?: return@update state + val currentTile = state.hexes[coord] ?: return@update state + if (state.gold < stallToPlace.cost) return@update state + if (currentTile.type != TileType.FLOOR && currentTile.type != TileType.DRAIN) return@update state + + val blocked = validateStallPlacement(coord, stallToPlace, state) ?: return@update state + + val newHexes = state.hexes.toMutableMap() + newHexes[coord] = currentTile.copy( + stall = stallToPlace.copy(id = UUID.randomUUID().toString()), + isPermanentlyWet = false + ) + + val updatedEnemies = recalculateEnemyPaths(state, blocked, newHexes) + state.copy( + hexes = newHexes, + gold = state.gold - stallToPlace.cost, + enemies = updatedEnemies, + lastSoldStall = null + ) + } }
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app/src/main/java/com/messark/hawker/MainViewModel.ktfixes.md
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Date appears to be incorrect. |
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Consider moving validation inside _gameState.update for consistency. handleBuildStall performs gold validation and validateStallPlacement checks against currentState captured outside the update block, then applies modifications using state inside. This creates a potential TOCTOU window and is inconsistent with the atomic pattern applied to sellStall and undoSell. On single-threaded Compose UI this is unlikely to cause issues, but aligning all stall operations to the same atomic pattern would improve consistency. |
Good point! I've refactored |
- Extracted special mode and stall build/selection logic from onCellClick into specialized handler methods. - Optimized validateStallPlacement to avoid redundant A* pathfinding for enemies whose paths are not intersected by new stalls. - Improved atomicity of handleBuildStall, sellStall and undoSell by moving all validation and hex map updates inside _gameState.update blocks. - Streamlined Tray Return Uncle rule check using idiomatic Kotlin. - Updated fixes.md with REF-013 and marked REF-012 as Resolved. Co-authored-by: candour <4670475+candour@users.noreply.github.com>
Build Successful! 🚀Note: This link will be removed when the PR is closed. |
1 participant
I have refactored the stall interaction logic in
MainViewModel.ktto improve modularity and performance. Specifically:onCellClickhas been simplified into a router that delegates to specialized methods likehandleBuildStall,handleStallSelection, and mode-specific handlers for pillar removal and outdoor puddles.validateStallPlacementnow skips expensive A* pathfinding for any enemy whose current path doesn't actually pass through the coordinate of the new stall. This significantly reduces the computational overhead during stall placement.sellStallandundoSellnow perform their validation and state modifications entirely within the_gameState.updateblock, ensuring atomic state transitions and better thread safety.anyandnonefor better readability.I have also updated
fixes.mdto reflect these improvements and marked the previous engine optimization (REF-012) as resolved. All relevant unit tests passed successfully.PR created automatically by Jules for task 11767897202155615896 started by @candour
Summary by CodeRabbit
Refactor
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