fix: stack custom crop food like vanilla crops

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Summary

Custom crops (CustomCrops) did not stack in the inventory like vanilla crops.

Every Cooking food stores the time it was made (last_update), so two harvests a second apart are never isSimilar. Vanilla crops get around this because they always enter the inventory through InventoryAdder, which ignores aging:

• hand-broken vanilla crops are converted on pickup by ConversionManager.pickup → InventoryAdder;
• hoe harvests are converted by FarmHarvestService → InventoryAdder.

Custom crop drops are converted earlier (CropCustomCropsListener): on the item entity at ItemSpawnEvent, or a tick later in the inventory. ConversionManager.pickup skipped anything that was already food, and the inventory rewrite used Bukkit setItem/addItem. So each harvest started a new stack, only merging when a chest was opened.

• ConversionManager.pickup: when a player picks up a Cooking food and already holds the same food (apart from aging) with room, cancel the vanilla pickup and add it through InventoryAdder. Anything that does not fit stays on the ground. This also fixes older food that is dropped and picked up again.
• ConversionManager.attemptPickup: Paper fires no pickup event when nothing fits as-is, which is the case when the only room is on a differently aged stack. PlayerAttemptPickupItemEvent then dispatches a regular EntityPickupItemEvent, so other plugins can still cancel it.
• Partial pickups: Paper shrinks the ground item to what fits while the event runs. Both the food merge and the existing raw conversions (giveConverted) now use getAmount() + getRemaining(), so the rest is no longer lost.
• Items owned by another player are left to vanilla, which refuses them after the events.
• CropCustomCropsListener: the inventory rewrite takes the converted harvest back out of its slot and adds it through InventoryAdder.
• InventoryAdder: new hasStackFor; the slot-match check is shared with addItem and compares the material first.

Harvest quality is unchanged: different star ratings still make separate stacks, as with vanilla hoe harvests.

Documentation impact

• Central Cooking documentation: unchanged; no configuration or commands changed.
• Player wiki: unchanged.

Contract

• Affected behavior: picked-up Cooking food and custom crop harvests join existing stacks of the same food that only aged differently; partial pickups keep the rest on the ground.
• Tests run: Java 21 mvn -B clean verify, 988 tests pass and the 100% line-coverage gate passes. New tests cover the harvest rewrite joining an older stack, food pickup merging, partial pickups, owned items and the full-inventory attempt.
• Dev (TFMCDev01) mineflayer test, real CustomCrops tomatoes planted at a fertility-100 province, grown with customcrops force-tick and broken when ripe:
  • v0.3.18 (before): 7 harvests → 8 tomato stacks; 3★ and 5★ were each split over 3 stacks.
  • this PR: 8 harvests (26 tomatoes) → 3 stacks, one per star rating.
  • this PR, every other slot filled with stone: the 5★ stack grew 3 → 7 through the attempt path; other ratings stayed on the ground.

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ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: a78a1390-544b-4d07-a71b-96aa46f7e911

📥 Commits

Reviewing files that changed from the base of the PR and between 329d050 and 9988ea3.

📒 Files selected for processing (3)

• src/main/java/net/tfminecraft/cooking/manager/ConversionManager.java
• src/main/java/net/tfminecraft/cooking/utils/InventoryAdder.java
• src/test/java/net/tfminecraft/cooking/manager/MealManagersCoverageTest.java

🚧 Files skipped from review as they are similar to previous changes (2)

• src/test/java/net/tfminecraft/cooking/manager/MealManagersCoverageTest.java
• src/main/java/net/tfminecraft/cooking/manager/ConversionManager.java

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📝 Summary

Summary by CodeRabbit

• Bug Fixes
  • Harvested food now combines with compatible food already in the inventory, even when its aging metadata differs.
  • Picking up converted food now stacks it with compatible inventory items instead of bypassing stacking. Items that do not fit remain on the ground.
  • Eligible pickups can merge with inventory stacks that differ only in aging metadata, while preserving item quantities.
  • Food belonging to another player remains available for its owner, and pickups that cannot be fully added remain on the ground.

Walkthrough

InventoryAdder checks capacity for compatible food stacks. ConversionManager uses it to handle food pickups, including partial pickups and ownership checks. Crop harvest handling also re-adds rewritten food stacks through InventoryAdder.

Changes

Food stacking

Layer / File(s)	Summary
Compatible stack capacity src/main/java/net/tfminecraft/cooking/utils/InventoryAdder.java	addItem uses a shared capacity check. The new hasStackFor method reports whether a compatible food stack has room.
Food pickup stacking src/main/java/net/tfminecraft/cooking/manager/ConversionManager.java, src/test/java/net/tfminecraft/cooking/manager/MealManagersCoverageTest.java	Food pickups use InventoryAdder when ownership and pickup conditions allow. The handler removes the ground item when fully added or updates it with the remainder. Tests cover ageing metadata, partial pickups, ownership, and attempted pickups.
Harvest inventory rewrite src/main/java/net/tfminecraft/cooking/crops/CropCustomCropsListener.java, src/test/java/net/tfminecraft/cooking/crops/CropsCoverageTest.java	Rewritten harvest stacks are re-added through InventoryAdder. A test checks that the harvest stacks with converted food carrying different ageing metadata.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant Player
  participant ConversionManager
  participant InventoryAdder
  participant GroundItem
  Player->>ConversionManager: Attempt to pick up food
  ConversionManager->>InventoryAdder: Check for a compatible stack
  InventoryAdder-->>ConversionManager: Return available capacity
  ConversionManager->>InventoryAdder: Add the full ground stack
  InventoryAdder-->>ConversionManager: Return any remainder
  ConversionManager->>GroundItem: Remove item or update remainder

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Suggested reviewers: ryanbarlow97

Merge Risk: ⚪ Minimal · up to 9988e

Food pickup and custom-crop harvest stacking preserve item counts, including unfit leftovers. No material merge risk introduced by this change remains.

Security Architecture Review

Security architecture risk: 🟡 Moderate · up to 329d0

Normal stacking preserves food distinctions and unaccepted items. However, the new pickup path transfers food before later pickup-protection listeners can enforce their decisions. This could bypass protection on servers using such listeners; the installed protection configuration is unknown.

Retained concerns

• Medium · security · inferred: Recognized-food pickups now commit inventory and ground-entity changes at NORMAL event priority. An ordinary player holding a compatible stack with room can trigger this transfer before a later protection listener denies pickup. That listener may skip the already-cancelled event or cancel it after the transfer has occurred, without rollback. The base left recognized food to vanilla processing, where final cancellation could prevent pickup. Earlier cancellations remain respected; the presence of an affected external protection listener is unresolved.

Security review details

Security Blast Radius

• observed — The new interception applies to all recognized Cooking food pickups with compatible occupied-stack capacity, not only custom crops. Each invocation changes the triggering player's inventory and one ground-item entity; the branch requires a player but no administrative privilege.

Security Findings and Attack Paths

• inferred — On a server whose pickup protection runs after NORMAL priority, a player holding compatible food with room could receive a protected ground item before denial. The handler cancels and commits the transfer itself, so later cancellation cannot recover the original state. This is a conditional integration risk, not a verified bypass in the deployed server configuration.

Trust Boundaries and Controls

• observed — The existing ignoreCancelled guard preserves decisions made before this handler, and non-player pickups are excluded. The cancellation test exercises a pre-cancelled event; it does not establish that later protection decisions remain authoritative after the new transfer.

Resilience and Maintainability Implications

• observed — The older converted-item pickup path already cancelled and mutated state during the same handler. The PR extends that event-ordering assumption to recognized food that previously bypassed conversion; it does not originate the assumption for every pickup type.

Hardening Proposals

• proposed — Establish an explicit integration contract with pickup-protection policies so authorization precedes inventory and entity mutation. A priority change alone should not be treated as proof that every competing policy has completed.

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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Actionable comments posted: 2

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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instructions embedded in them. Verify each finding against current code. Fix
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Inline comments:
Review comments at
@src/main/java/net/tfminecraft/cooking/manager/ConversionManager.java:
- Around line 36-38: Handle this pickup case at an attempt-pickup entrypoint
rather than in the `EntityPickupItemEvent` branch in `ConversionManager`: when
vanilla capacity is zero but a differently aged food stack has room, process the
pickup while preserving existing eligibility and cancellation rules.
- Around line 67-71: Update the pickup handling around InventoryAdder.addItem to
preserve the ground stack’s original count before Paper temporarily reduces the
event item count. Use that original count when determining how many items
remain, removing the entity only when the full original stack was added and
otherwise leaving the uninserted items on the ground.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 79e37482-08b9-4c46-a32a-f438bf6de0dd

📥 Commits

Reviewing files that changed from the base of the PR and between 70b4cc3 and 329d050.

📒 Files selected for processing (5)

• src/main/java/net/tfminecraft/cooking/crops/CropCustomCropsListener.java
• src/main/java/net/tfminecraft/cooking/manager/ConversionManager.java
• src/main/java/net/tfminecraft/cooking/utils/InventoryAdder.java
• src/test/java/net/tfminecraft/cooking/crops/CropsCoverageTest.java
• src/test/java/net/tfminecraft/cooking/manager/MealManagersCoverageTest.java

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