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simoleo89
107 lines
4.0 KiB
Markdown
107 lines
4.0 KiB
Markdown
# Earnings Center Design
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## Goal
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Add an emulator-owned rewards hub for the "Guadagni" UI. The client and renderer may decide how it looks, but the emulator must own reward amounts, claim eligibility, cooldowns, and anti-abuse checks.
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## Scope
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The first emulator version exposes ten earnings categories:
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- `daily_gift`
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- `games`
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- `achievements`
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- `marketplace`
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- `hc_payday`
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- `level_progress`
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- `donations`
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- `bonus_bag`
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- `mystery_boxes`
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- `club_job`
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Every category can be enabled, disabled, configured with one or more reward currencies, and claimed through a single-row claim or a claim-all request. Categories that are not yet backed by a native hotel subsystem still work through static configuration, so the UI contract is stable while deeper integrations are added later.
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Supported configured reward types are credits, pixels/duckets, seasonal points, badges, furni items, and HC days.
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## Architecture
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Add a focused `com.eu.habbo.habbohotel.earnings` package:
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- `EarningsCenterManager` loads category definitions from emulator settings, builds per-user state, and performs claims.
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- `EarningsCategory` is the allowlisted category enum and carries the client key.
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- `EarningsReward` represents one configured reward.
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- `EarningsEntry` is the serializable row state sent to the client.
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- `EarningsClaimResult` reports single/all claim outcomes.
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The packet layer only parses category keys and delegates to the manager. The client never sends amounts, cooldowns, or reward definitions.
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## Persistence
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Add a database update that creates `users_earnings_claims`:
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- `id`
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- `user_id`
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- `category`
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- `period_key`
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- `claimed_at`
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- unique key on `user_id`, `category`, `period_key`
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The unique key is the main double-claim guard. `period_key` is calculated by the emulator from the category cooldown. Daily-style rewards use the UTC date key by default. One-time or long cooldown rows can use the cooldown bucket derived from `claimed_at`.
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## Configuration
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Add emulator settings with safe defaults:
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- `earnings.enabled=0`
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- `earnings.<category>.enabled=1`
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- `earnings.<category>.cooldown.seconds=86400`
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- `earnings.<category>.credits=0`
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- `earnings.<category>.pixels=0`
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- `earnings.<category>.points=0`
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- `earnings.<category>.points.type=5`
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- `earnings.<category>.badge=`
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- `earnings.<category>.item_id=0`
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- `earnings.<category>.item.quantity=1`
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- `earnings.<category>.hc.days=0`
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The feature defaults off so existing hotels do not receive surprise economy changes after deploying the jar.
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## Packet Contract
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Add three incoming handlers:
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- `RequestEarningsCenterEvent`
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- `ClaimEarningsRewardEvent`
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- `ClaimAllEarningsRewardsEvent`
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Add two outgoing composers:
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- `EarningsCenterComposer`
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- `EarningsClaimResultComposer`
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Composer format is intentionally simple and renderer-friendly: category key, enabled state, claimable state, next claim timestamp, rewards, and result code. Header IDs must be wired through `messages.ini`/packet registration in the same style as the rest of the emulator. If the renderer side chooses final IDs later, only the packet mapping should need adjustment.
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## Security
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- Reject unknown category keys.
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- Reject all claims when `earnings.enabled=0`.
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- Never trust reward amounts from the client.
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- Clamp configured rewards to non-negative values and bounded item/HC limits.
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- Roll back the claim record if a DB-backed reward grant fails.
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- Use the database unique key to prevent concurrent double claims.
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- `claim all` processes only claimable rows and returns per-category results.
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## Tests
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Add unit tests around the manager-level logic:
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- disabled global feature returns disabled rows and rejects claims
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- unknown category is rejected
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- successful claim grants configured currency once
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- duplicate claim in the same period is rejected
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- claim-all grants all claimable rows and skips already claimed rows
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- badge/item/HC reward rows are included in state
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- failed reward grants roll back the claim record
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Packet tests can remain light because renderer IDs may be finalized separately; the critical behavior is the server-side claim guard.
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