✨Feature: enhance encounter resolution with creature names and result labels

src/rules/encounters.ts

@@ -0,0 +1,110 @@
+import { findTableByCode } from "@/data/contentHelpers";
+import type { ContentPack } from "@/types/content";
+import type { EncounterState, RoomState } from "@/types/state";
+
+import { lookupTable, type TableLookupResult } from "./tables";
+import type { DiceRoller } from "./dice";
+
+export type EncounterResolutionResult = {
+  room: RoomState;
+  encounter?: EncounterState;
+  lookup?: TableLookupResult;
+};
+
+const ROOM_HINT_TO_TABLE: Array<{ pattern: RegExp; tableCode: string }> = [
+  { pattern: /\bdogs?\b/i, tableCode: "L1D" },
+  { pattern: /\bguards?\b/i, tableCode: "L1G" },
+  { pattern: /\bmartial\b/i, tableCode: "L1M" },
+  { pattern: /\bworkers?\b/i, tableCode: "L1W" },
+  { pattern: /\blabourers?\b/i, tableCode: "L1P" },
+  { pattern: /\bpreacher\b/i, tableCode: "L1P" },
+  { pattern: /\banimals?\b/i, tableCode: "L1A" },
+  { pattern: /\bsnakes?\b/i, tableCode: "L1A" },
+  { pattern: /\bfungal\b/i, tableCode: "L1F" },
+  { pattern: /\bslimy\b/i, tableCode: "L1F" },
+  { pattern: /\bcrate\b/i, tableCode: "L1CE" },
+];
+
+function splitEncounterLabel(label: string) {
+  return label
+    .split(/\sand\s/i)
+    .map((part) => part.trim())
+    .filter(Boolean);
+}
+
+function inferEncounterTableCode(room: RoomState) {
+  const noteText = room.notes.join(" ");
+  const flagText = room.flags.join(" ");
+  const combinedText = `${noteText} ${flagText}`;
+
+  for (const mapping of ROOM_HINT_TO_TABLE) {
+    if (mapping.pattern.test(combinedText)) {
+      return mapping.tableCode;
+    }
+  }
+
+  return undefined;
+}
+
+function isNonEncounterRoom(room: RoomState) {
+  const noteText = room.notes.join(" ").toLowerCase();
+  return noteText.includes("nothing here") || noteText.includes("no encounter");
+}
+
+export function resolveRoomEncounter(
+  content: ContentPack,
+  room: RoomState,
+  roller?: DiceRoller,
+): EncounterResolutionResult {
+  if (room.encounter?.resolved) {
+    return {
+      room,
+      encounter: room.encounter,
+    };
+  }
+
+  if (isNonEncounterRoom(room)) {
+    const emptyEncounter: EncounterState = {
+      id: `${room.id}.encounter`,
+      creatureIds: [],
+      creatureNames: [],
+      resultLabel: "No encounter",
+      resolved: true,
+    };
+
+    return {
+      room: {
+        ...room,
+        encounter: emptyEncounter,
+      },
+      encounter: emptyEncounter,
+    };
+  }
+
+  const tableCode = inferEncounterTableCode(room);
+
+  if (!tableCode) {
+    return { room };
+  }
+
+  const table = findTableByCode(content, tableCode);
+  const lookup = lookupTable(table, { roller });
+  const creatureNames = splitEncounterLabel(lookup.entry.label);
+  const encounter: EncounterState = {
+    id: `${room.id}.encounter`,
+    sourceTableCode: tableCode,
+    creatureIds: creatureNames.map((_, index) => `${room.id}.creature.${index + 1}`),
+    creatureNames,
+    resultLabel: lookup.entry.label,
+    resolved: true,
+  };
+
+  return {
+    room: {
+      ...room,
+      encounter,
+    },
+    encounter,
+    lookup,
+  };
+}