ModernUO/Distribution/Data/Spawns/shared/felucca/Graveyards.json
Kamron Batman d8a64f3316
refactor(spawners): replace DynamicJson with typed SpawnerDto records (#2505)
## Summary

Removes the dated `DynamicJson` JSON helper and migrates spawner JSON (de)serialization to a polymorphic `record SpawnerDto` hierarchy. `DynamicJson` was the last remaining consumer (regions moved off it in #1400).

The key correctness improvement: **System.Text.Json deserializes plain DTO records, never a live `Item`.** Previously, deserializing directly into an `Item` meant STJ constructed world-registered objects *before* the data was validated — a malformed/hand-edited spawn file could leave orphaned spawner Items in the world save. Now a parse failure is GC-only; `dto.ToSpawner()` constructs the spawner only from a fully-validated DTO and self-cleans on failure.

## What changed

- **New:** `SpawnerDto` (abstract) + `SpawnerDataDto` / `RegionSpawnerDto` / `ProximitySpawnerDto`, each marked with a reusable `[JsonDiscoverableType]` opt-in attribute. Auto-discovered at the `Configure` phase — no manual registration list (avoids the regions `Register<T>()` footgun), open to custom spawner subtypes.
- **Symmetric mapping:** `BaseSpawner.ToDto()` (export) ⇄ `SpawnerDto.ToSpawner()` (import). `ToSpawner()` deletes-and-rethrows on any failure, so the importer can never orphan an Item.
- **`SpawnerJsonSerializer`** wires `$type` polymorphism on the `SpawnerDto` root with loud collision/constructibility validation.
- **Import/export commands** rewired to the typed DTO path (reflection `FindTypeByName`/`CreateInstance` removed).
- **Data migration:** the 109 `Distribution/Data/Spawns/**` files moved from `"type"`→`"$type"` and legacy `homeRange`→`spawnBounds`. The runtime still *reads* legacy `homeRange` for external files. The `homeRange→spawnBounds` formula is proven equivalent to the runtime conversion (`BoundsEquivalenceTests`, hr=0/1/3/7).
- **Deleted:** `Projects/Server/Json/DynamicJson.cs`.

Sparse export output matches the legacy `ToJson` (nullable DTO properties + `WhenWritingNull`). Binary world-save serialization is untouched.

## Tests

- DTO round-trip per spawner type; sparse-default omission; legacy `homeRange` read; export/import file round-trip.
- `Import_MalformedFile_LeaksNoWorldItems` — proves a mid-array parse failure constructs zero world Items.
- `AllSpawnFilesLoadTests` — every migrated spawn file deserializes and builds.
- Duplicate-discriminator validation.
- UOContent.Tests 485/485, Server.Tests 710/710, build clean.

## Follow-up (not in this PR)

`Rectangle3DConverter.Write` (in `Projects/Server/`) omits `z1/z2` when `Start.Z == -128`, so a future server-side export of a `homeRange`-style spawner round-trips depth 256→255. Pre-existing and out of scope here (Server change); the migrated data reads correctly. Worth a separate small converter PR.
2026-06-25 23:24:45 -07:00

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[
{
"$type": "Spawner",
"guid": "04856160-7e89-4672-a7d9-468b8634c3d6",
"name": "Spawner (208)",
"location": [4545, 1317, 8],
"map": "Felucca",
"count": 4,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"spawnBounds": {
"start": { "x": 4535, "y": 1307, "z": -128 },
"end": { "x": 4555, "y": 1327, "z": 25 }
},
"walkingRange": 20,
"entries": [
{ "name": "Spectre", "maxCount": 1, "probability": 100 },
{ "name": "Shade", "maxCount": 1, "probability": 100 },
{ "name": "Wraith", "maxCount": 1, "probability": 100 },
{ "name": "Skeleton", "maxCount": 1, "probability": 100 },
{ "name": "Zombie", "maxCount": 2, "probability": 100 }
]
},
{
"$type": "Spawner",
"guid": "14b45cdf-987e-4dff-9e9f-10e90e3662e6",
"name": "Spawner (208)",
"location": [2758, 867, 0],
"map": "Felucca",
"count": 9,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"spawnBounds": {
"start": { "x": 2738, "y": 847, "z": -128 },
"end": { "x": 2778, "y": 887, "z": 15 }
},
"walkingRange": 20,
"entries": [
{ "name": "Spectre", "maxCount": 2, "probability": 100 },
{ "name": "Wraith", "maxCount": 2, "probability": 100 },
{ "name": "Skeleton", "maxCount": 3, "probability": 100 },
{ "name": "Zombie", "maxCount": 4, "probability": 100 }
]
},
{
"$type": "Spawner",
"guid": "43d53b7d-95f9-4332-8d22-33e5f5a1fcf6",
"name": "Spawner (208)",
"location": [722, 1119, 0],
"map": "Felucca",
"count": 10,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"homeRange": 20,
"walkingRange": 20,
"entries": [
{ "name": "Skeleton", "maxCount": 10, "probability": 100 }
]
},
{
"$type": "Spawner",
"guid": "47aa8449-5b66-401f-ac38-c5b6538627b6",
"name": "Spawner (208)",
"location": [4543, 1314, 8],
"map": "Felucca",
"count": 1,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"spawnBounds": {
"start": { "x": 4533, "y": 1304, "z": -128 },
"end": { "x": 4553, "y": 1324, "z": 25 }
},
"walkingRange": 20,
"entries": [
{ "name": "Lich", "maxCount": 1, "probability": 100 }
]
},
{
"$type": "Spawner",
"guid": "522530f4-50ea-4fbf-9119-b783bd955678",
"name": "Spawner (208)",
"location": [2438, 1100, 8],
"map": "Felucca",
"count": 4,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"spawnBounds": {
"start": { "x": 2428, "y": 1090, "z": -128 },
"end": { "x": 2448, "y": 1110, "z": 30 }
},
"walkingRange": 20,
"entries": [
{ "name": "Spectre", "maxCount": 1, "probability": 100 },
{ "name": "Shade", "maxCount": 1, "probability": 100 },
{ "name": "Wraith", "maxCount": 1, "probability": 100 },
{ "name": "Lich", "maxCount": 1, "probability": 100 },
{ "name": "Skeleton", "maxCount": 1, "probability": 100 },
{ "name": "Zombie", "maxCount": 1, "probability": 100 }
]
},
{
"$type": "Spawner",
"guid": "7dfee8fd-49f0-457d-a88c-f38c65bf2474",
"name": "Spawner (208)",
"location": [1369, 1475, 10],
"map": "Felucca",
"count": 9,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"homeRange": 20,
"walkingRange": 30,
"entries": [
{ "name": "Spectre", "maxCount": 2, "probability": 100 },
{ "name": "Wraith", "maxCount": 2, "probability": 100 },
{ "name": "Skeleton", "maxCount": 3, "probability": 100 },
{ "name": "Zombie", "maxCount": 4, "probability": 100 }
]
},
{
"$type": "Spawner",
"guid": "8bdfe6b3-df80-48b6-8d1e-8e052efde18b",
"name": "Spawner (208)",
"location": [3407, 2652, 48],
"map": "Felucca",
"count": 4,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"homeRange": 10,
"walkingRange": 15,
"entries": [
{ "name": "Zombie", "maxCount": 4, "probability": 100 },
{ "name": "Skeleton", "maxCount": 4, "probability": 100 }
]
},
{
"$type": "Spawner",
"guid": "b3ba766a-4852-4c5e-adf1-0276e193317f",
"name": "Spawner (208)",
"location": [1285, 3731, 0],
"map": "Felucca",
"count": 9,
"minDelay": "00:05:00",
"maxDelay": "00:10:00",
"team": 0,
"spawnBounds": {
"start": { "x": 1275, "y": 3721, "z": -128 },
"end": { "x": 1295, "y": 3741, "z": 15 }
},
"walkingRange": 15,
"entries": [
{ "name": "Spectre", "maxCount": 2, "probability": 100 },
{ "name": "Wraith", "maxCount": 2, "probability": 100 },
{ "name": "Shade", "maxCount": 2, "probability": 100 },
{ "name": "Skeleton", "maxCount": 3, "probability": 100 },
{ "name": "Zombie", "maxCount": 4, "probability": 100 }
]
}
]