refactor(web): extract allocation release classification

apps/web/src/hooks/timelineAllocationRelease.ts

@@ -0,0 +1,62 @@
+import { buildAllocationBlockClickInfo, buildAllocationMutationPlan } from "./timelineAllocationActions.js";
+import { hasAllocationDateChange, shouldTreatAllocationDragAsClick } from "./timelineAllocationFinalize.js";
+
+type AllocationReleaseLike = {
+  isActive: boolean;
+  mode: "move" | "resize-start" | "resize-end";
+  pointerDeltaX: number;
+  daysDelta: number;
+  allocationId: string | null;
+  mutationAllocationId: string | null;
+  projectId: string | null;
+  projectName: string | null;
+  scope: "allocation" | "segment";
+  allocationStartDate: Date | null;
+  allocationEndDate: Date | null;
+  originalStartDate: Date | null;
+  originalEndDate: Date | null;
+  currentStartDate: Date | null;
+  currentEndDate: Date | null;
+};
+
+type AllocationBlockClickInfo = ReturnType<typeof buildAllocationBlockClickInfo>;
+type AllocationMutationPlan = NonNullable<ReturnType<typeof buildAllocationMutationPlan>>;
+
+export type AllocationReleaseOutcome =
+  | { kind: "ignore"; preservePreview: false }
+  | { kind: "reset"; preservePreview: boolean }
+  | { kind: "shift-click"; allocationId: string; preservePreview: boolean }
+  | { kind: "click"; clickInfo: NonNullable<AllocationBlockClickInfo>; preservePreview: boolean }
+  | { kind: "mutation"; mutationPlan: AllocationMutationPlan; preservePreview: true };
+
+export function resolveAllocationRelease(
+  alloc: AllocationReleaseLike,
+  { clickThresholdPx, wasShift }: { clickThresholdPx: number; wasShift: boolean },
+): AllocationReleaseOutcome {
+  if (!alloc.isActive) {
+    return { kind: "ignore", preservePreview: false };
+  }
+
+  const preservePreview = hasAllocationDateChange(alloc);
+  const shouldTreatAsClick = shouldTreatAllocationDragAsClick(alloc, clickThresholdPx);
+
+  if (shouldTreatAsClick && alloc.allocationId) {
+    if (wasShift) {
+      return { kind: "shift-click", allocationId: alloc.allocationId, preservePreview };
+    }
+
+    const clickInfo = buildAllocationBlockClickInfo(alloc);
+    if (clickInfo) {
+      return { kind: "click", clickInfo, preservePreview };
+    }
+  }
+
+  if (preservePreview && alloc.allocationId && alloc.currentStartDate && alloc.currentEndDate) {
+    const mutationPlan = buildAllocationMutationPlan(alloc);
+    if (mutationPlan) {
+      return { kind: "mutation", mutationPlan, preservePreview: true };
+    }
+  }
+
+  return { kind: "reset", preservePreview };
+}