Implement validation for ProjectTimeNightBackgroundSettings in scene-document-validation.ts

src/document/scene-document-validation.ts

@@ -662,8 +662,62 @@ function validateProjectTimePhaseProfile(
   }
 }
 
+function validateProjectTimeNightBackgroundSettings(
+  nightBackground: ProjectTimeNightBackgroundSettings,
+  assets: Record<string, ProjectAssetRecord>,
+  diagnostics: SceneDiagnostic[],
+  path: string
+) {
+  if (nightBackground.assetId !== null) {
+    if (nightBackground.assetId.trim().length === 0) {
+      diagnostics.push(
+        createDiagnostic(
+          "error",
+          "invalid-project-time-night-background-asset-id",
+          "Night background image ids must be non-empty when authored.",
+          `${path}.assetId`
+        )
+      );
+    } else {
+      const backgroundAsset = assets[nightBackground.assetId];
+
+      if (backgroundAsset === undefined) {
+        diagnostics.push(
+          createDiagnostic(
+            "error",
+            "missing-project-time-night-background-asset",
+            `Night background image asset ${nightBackground.assetId} does not exist.`,
+            `${path}.assetId`
+          )
+        );
+      } else if (backgroundAsset.kind !== "image") {
+        diagnostics.push(
+          createDiagnostic(
+            "error",
+            "invalid-project-time-night-background-asset-kind",
+            "Night background images must reference image assets.",
+            `${path}.assetId`
+          )
+        );
+      }
+    }
+  }
+
+  if (!isNonNegativeFiniteNumber(nightBackground.environmentIntensity)) {
+    diagnostics.push(
+      createDiagnostic(
+        "error",
+        "invalid-project-time-night-background-environment-intensity",
+        "Night background environment intensity must be a non-negative finite number.",
+        `${path}.environmentIntensity`
+      )
+    );
+  }
+}
+
 function validateProjectTimeSettings(
   time: ProjectTimeSettings,
+  assets: Record<string, ProjectAssetRecord>,
   diagnostics: SceneDiagnostic[],
   path = "time"
 ) {
@@ -804,6 +858,12 @@ function validateProjectTimeSettings(
   validateProjectTimePhaseProfile(time.dawn, diagnostics, `${path}.dawn`, "dawn");
   validateProjectTimePhaseProfile(time.dusk, diagnostics, `${path}.dusk`, "dusk");
   validateProjectTimePhaseProfile(time.night, diagnostics, `${path}.night`, "night");
+  validateProjectTimeNightBackgroundSettings(
+    time.nightBackground,
+    assets,
+    diagnostics,
+    `${path}.nightBackground`
+  );
 }
 
 function validatePointLightEntity(