1 files changed, 285 insertions, 0 deletions
diff --git a/apps/web/src/animation/target-resolver.ts b/apps/web/src/animation/target-resolver.ts
new file mode 100644
index 00000000..32e7917c
--- /dev/null
+++ b/apps/web/src/animation/target-resolver.ts
@@ -0,0 +1,285 @@
+import type {
+	AnimationBindingKind,
+	AnimationInterpolation,
+	AnimationPath,
+	AnimationValue,
+} from "@/animation/types";
+import {
+	parseEffectParamPath,
+	isEffectParamPath,
+} from "@/animation/effect-param-channel";
+import {
+	isGraphicParamPath,
+	parseGraphicParamPath,
+} from "@/animation/graphic-param-channel";
+import type { ParamDefinition } from "@/params";
+import { effectsRegistry, registerDefaultEffects } from "@/effects";
+import { getGraphicDefinition } from "@/graphics";
+import type { TimelineElement } from "@/timeline";
+import { isVisualElement } from "@/timeline/element-utils";
+import { snapToStep } from "@/utils/math";
+import {
+	coerceAnimationValueForProperty,
+	getAnimationPropertyDefinition,
+	getElementBaseValueForProperty,
+	isAnimationPropertyPath,
+	type NumericSpec,
+	withElementBaseValueForProperty,
+} from "./property-registry";
+import { parseColorToLinearRgba } from "./binding-values";
+
+export interface AnimationPathDescriptor {
+	kind: AnimationBindingKind;
+	defaultInterpolation: AnimationInterpolation;
+	numericRanges?: Partial<Record<string, NumericSpec>>;
+	coerceValue: ({ value }: { value: AnimationValue }) => AnimationValue | null;
+	getBaseValue: () => AnimationValue | null;
+	setBaseValue: ({ value }: { value: AnimationValue }) => TimelineElement;
+}
+
+export function getParamValueKind({
+	param,
+}: {
+	param: ParamDefinition;
+}): AnimationBindingKind {
+	if (param.type === "number") {
+		return "number";
+	}
+
+	if (param.type === "color") {
+		return "color";
+	}
+
+	return "discrete";
+}
+
+export function getParamDefaultInterpolation({
+	param,
+}: {
+	param: ParamDefinition;
+}): AnimationInterpolation {
+	return param.type === "number" || param.type === "color" ? "linear" : "hold";
+}
+
+function getParamNumericRange({
+	param,
+}: {
+	param: ParamDefinition;
+}): Partial<Record<string, NumericSpec>> | undefined {
+	if (param.type !== "number") {
+		return undefined;
+	}
+
+	return {
+		value: {
+			min: param.min,
+			max: param.max,
+			step: param.step,
+		},
+	};
+}
+
+export function coerceAnimationValueForParam({
+	param,
+	value,
+}: {
+	param: ParamDefinition;
+	value: AnimationValue;
+}): number | string | boolean | null {
+	if (param.type === "number") {
+		if (typeof value !== "number" || Number.isNaN(value)) {
+			return null;
+		}
+
+		const steppedValue = snapToStep({ value, step: param.step });
+		const minValue = param.min;
+		const maxValue = param.max ?? Number.POSITIVE_INFINITY;
+		return Math.min(maxValue, Math.max(minValue, steppedValue));
+	}
+
+	if (param.type === "color") {
+		return typeof value === "string" ? value : null;
+	}
+
+	if (param.type === "boolean") {
+		return typeof value === "boolean" ? value : null;
+	}
+
+	if (typeof value !== "string") {
+		return null;
+	}
+
+	return param.options.some((option) => option.value === value) ? value : null;
+}
+
+function buildGraphicParamDescriptor({
+	element,
+	paramKey,
+}: {
+	element: TimelineElement;
+	paramKey: string;
+}): AnimationPathDescriptor | null {
+	if (element.type !== "graphic") {
+		return null;
+	}
+
+	const definition = getGraphicDefinition({
+		definitionId: element.definitionId,
+	});
+	const param = definition.params.find((candidate) => candidate.key === paramKey);
+	if (!param) {
+		return null;
+	}
+
+	return {
+		kind: getParamValueKind({ param }),
+		defaultInterpolation: getParamDefaultInterpolation({ param }),
+		numericRanges: getParamNumericRange({ param }),
+		coerceValue: ({ value }) => coerceAnimationValueForParam({ param, value }),
+		getBaseValue: () => element.params[param.key] ?? param.default,
+		setBaseValue: ({ value }) => {
+			const coercedValue = coerceAnimationValueForParam({ param, value });
+			if (coercedValue === null) {
+				return element;
+			}
+
+			return {
+				...element,
+				params: {
+					...element.params,
+					[param.key]: coercedValue,
+				},
+			};
+		},
+	};
+}
+
+function buildEffectParamDescriptor({
+	element,
+	effectId,
+	paramKey,
+}: {
+	element: TimelineElement;
+	effectId: string;
+	paramKey: string;
+}): AnimationPathDescriptor | null {
+	if (!isVisualElement(element)) {
+		return null;
+	}
+
+	const effect = element.effects?.find((candidate) => candidate.id === effectId);
+	if (!effect) {
+		return null;
+	}
+
+	registerDefaultEffects();
+	const definition = effectsRegistry.get(effect.type);
+	const param = definition.params.find((candidate) => candidate.key === paramKey);
+	if (!param) {
+		return null;
+	}
+
+	return {
+		kind: getParamValueKind({ param }),
+		defaultInterpolation: getParamDefaultInterpolation({ param }),
+		numericRanges: getParamNumericRange({ param }),
+		coerceValue: ({ value }) => coerceAnimationValueForParam({ param, value }),
+		getBaseValue: () => effect.params[param.key] ?? param.default,
+		setBaseValue: ({ value }) => {
+			const coercedValue = coerceAnimationValueForParam({ param, value });
+			if (coercedValue === null) {
+				return element;
+			}
+
+			return {
+				...element,
+				effects:
+					element.effects?.map((candidate) =>
+						candidate.id !== effectId
+							? candidate
+							: {
+									...candidate,
+									params: {
+										...candidate.params,
+										[param.key]: coercedValue,
+									},
+								},
+					) ?? element.effects,
+			};
+		},
+	};
+}
+
+export function isAnimationPath(
+	propertyPath: string,
+): propertyPath is AnimationPath {
+	return (
+		isAnimationPropertyPath(propertyPath) ||
+		isGraphicParamPath(propertyPath) ||
+		isEffectParamPath(propertyPath)
+	);
+}
+
+export function resolveAnimationTarget({
+	element,
+	path,
+}: {
+	element: TimelineElement;
+	path: AnimationPath;
+}): AnimationPathDescriptor | null {
+	if (isAnimationPropertyPath(path)) {
+		const propertyDefinition = getAnimationPropertyDefinition({
+			propertyPath: path,
+		});
+		if (!propertyDefinition.supportsElement({ element })) {
+			return null;
+		}
+
+		return {
+			kind: propertyDefinition.kind,
+			defaultInterpolation: propertyDefinition.defaultInterpolation,
+			numericRanges: propertyDefinition.numericRanges,
+			coerceValue: ({ value }) =>
+				coerceAnimationValueForProperty({
+					propertyPath: path,
+					value,
+				}),
+			getBaseValue: () =>
+				getElementBaseValueForProperty({
+					element,
+					propertyPath: path,
+				}),
+			setBaseValue: ({ value }) => {
+				const coercedValue = propertyDefinition.coerceValue({ value });
+				if (coercedValue === null) {
+					return element;
+				}
+
+				return withElementBaseValueForProperty({
+					element,
+					propertyPath: path,
+					value: coercedValue,
+				});
+			},
+		};
+	}
+
+	const graphicParamTarget = parseGraphicParamPath({ propertyPath: path });
+	if (graphicParamTarget) {
+		return buildGraphicParamDescriptor({
+			element,
+			paramKey: graphicParamTarget.paramKey,
+		});
+	}
+
+	const effectParamTarget = parseEffectParamPath({ propertyPath: path });
+	if (effectParamTarget) {
+		return buildEffectParamDescriptor({
+			element,
+			effectId: effectParamTarget.effectId,
+			paramKey: effectParamTarget.paramKey,
+		});
+	}
+
+	return null;
+}