Add custom intervention modals

lib/create/removeMethodCardFromFacetSelection.ts

@@ -0,0 +1,86 @@
+import type { CreateFlowState } from "../../app/(app)/create/types";
+import {
+  CUSTOM_RULE_FACET_BY_GROUP,
+  type TemplateFacetGroupKey,
+} from "./customRuleFacets";
+import { isCustomMethodCardId } from "./isCustomMethodCardId";
+
+export type MethodFacetGroupKey = Exclude<TemplateFacetGroupKey, "coreValues">;
+
+/**
+ * Removes one method card id from a facet’s selection and clears its detail
+ * override row; if the id is a custom wizard card, also drops meta + field blocks.
+ */
+export function removeMethodCardFromFacetSelection(
+  state: CreateFlowState,
+  facetGroupKey: MethodFacetGroupKey,
+  cardId: string,
+): Partial<CreateFlowState> {
+  const row = CUSTOM_RULE_FACET_BY_GROUP.get(facetGroupKey);
+  if (!row || row.kind !== "method") {
+    throw new Error(
+      `removeMethodCardFromFacetSelection: not a method facet (${facetGroupKey})`,
+    );
+  }
+
+  const selectedIds = [...row.selectionIds(state)];
+  if (!selectedIds.includes(cardId)) {
+    return {};
+  }
+  const nextSelected = selectedIds.filter((id) => id !== cardId);
+
+  const detailKey = row.detailOverridesStateKey as
+    | "communicationMethodDetailsById"
+    | "membershipMethodDetailsById"
+    | "decisionApproachDetailsById"
+    | "conflictManagementDetailsById";
+  const prevDetails = state[detailKey] as Record<string, unknown> | undefined;
+  const nextDetails: Record<string, unknown> = { ...(prevDetails ?? {}) };
+  delete nextDetails[cardId];
+
+  const patch: Partial<CreateFlowState> = {};
+
+  (patch as Record<string, unknown>)[row.selectedIdsStateKey] = nextSelected;
+
+  const detailsPatch =
+    Object.keys(nextDetails).length > 0 ? nextDetails : undefined;
+  switch (detailKey) {
+    case "communicationMethodDetailsById":
+      patch.communicationMethodDetailsById =
+        detailsPatch as CreateFlowState["communicationMethodDetailsById"];
+      break;
+    case "membershipMethodDetailsById":
+      patch.membershipMethodDetailsById =
+        detailsPatch as CreateFlowState["membershipMethodDetailsById"];
+      break;
+    case "decisionApproachDetailsById":
+      patch.decisionApproachDetailsById =
+        detailsPatch as CreateFlowState["decisionApproachDetailsById"];
+      break;
+    case "conflictManagementDetailsById":
+      patch.conflictManagementDetailsById =
+        detailsPatch as CreateFlowState["conflictManagementDetailsById"];
+      break;
+    default: {
+      const _exhaustive: never = detailKey;
+      throw new Error(
+        `removeMethodCardFromFacetSelection: unknown detail key ${_exhaustive}`,
+      );
+    }
+  }
+
+  const meta = state.customMethodCardMetaById ?? {};
+  if (isCustomMethodCardId(cardId, meta)) {
+    const nextMeta = { ...meta };
+    delete nextMeta[cardId];
+    patch.customMethodCardMetaById =
+      Object.keys(nextMeta).length > 0 ? nextMeta : undefined;
+
+    const nextBlocks = { ...(state.customMethodCardFieldBlocksById ?? {}) };
+    delete nextBlocks[cardId];
+    patch.customMethodCardFieldBlocksById =
+      Object.keys(nextBlocks).length > 0 ? nextBlocks : undefined;
+  }
+
+  return patch;
+}