refactor(web): extract range release resolution

apps/web/src/hooks/timelineRangeRelease.ts

@@ -0,0 +1,53 @@
+import { finalizeRangeSelection, type RangeSelectionResult } from "./timelineRangeSelection.js";
+
+type RangeStateLike = {
+  isSelecting: boolean;
+  resourceId: string | null;
+  startDate: Date | null;
+  currentDate: Date | null;
+  suggestedProjectId: string | null;
+  startClientX: number;
+};
+
+export type RangeReleaseResolution<TState> =
+  | { kind: "noop"; nextState: TState; selection: null }
+  | { kind: "complete"; nextState: TState; selection: RangeSelectionResult };
+
+export function resolveRangeSelectionRelease<TState extends RangeStateLike>(
+  state: TState,
+  anchorX: number,
+  anchorY: number,
+  initialState: TState,
+): RangeReleaseResolution<TState> {
+  const selection = finalizeRangeSelection(state, anchorX, anchorY);
+  if (!selection) {
+    return {
+      kind: "noop",
+      nextState: state,
+      selection: null,
+    };
+  }
+
+  return {
+    kind: "complete",
+    nextState: initialState,
+    selection,
+  };
+}
+
+export function resolveRangeSelectionCancel<TState extends RangeStateLike>(
+  state: TState,
+  initialState: TState,
+): { didReset: boolean; nextState: TState } {
+  if (!state.isSelecting) {
+    return {
+      didReset: false,
+      nextState: state,
+    };
+  }
+
+  return {
+    didReset: true,
+    nextState: initialState,
+  };
+}