Refine use cases rule examples

lib/useCaseCompletedRule.ts

@@ -0,0 +1,52 @@
+import type { CommunityRuleSection } from "../app/components/type/CommunityRule/CommunityRule.types";
+import { parsePublishedDocumentForCommunityRuleDisplay } from "./create/publishedDocumentToDisplaySections";
+import type useCasesCompletedRules from "../messages/en/pages/useCasesCompletedRules.json";
+import {
+  isUseCaseDetailSlug,
+  useCaseContentKeyForSlug,
+  type UseCaseDetailSlug,
+} from "./useCaseSyntheticPost";
+
+export type UseCasesCompletedRulesMessages = typeof useCasesCompletedRules;
+
+export type UseCaseCompletedRuleFixture =
+  UseCasesCompletedRulesMessages[keyof UseCasesCompletedRulesMessages];
+
+export function getUseCaseCompletedRuleFixture(
+  slug: UseCaseDetailSlug,
+  completedRules: UseCasesCompletedRulesMessages,
+): UseCaseCompletedRuleFixture {
+  const contentKey = useCaseContentKeyForSlug(slug);
+  return completedRules[contentKey];
+}
+
+export function buildUseCaseCompletedRuleSections(
+  fixture: UseCaseCompletedRuleFixture,
+): CommunityRuleSection[] {
+  return parsePublishedDocumentForCommunityRuleDisplay(fixture.document);
+}
+
+export function resolveUseCaseCompletedRule(
+  slug: string,
+  completedRules: UseCasesCompletedRulesMessages,
+):
+  | {
+      slug: UseCaseDetailSlug;
+      fixture: UseCaseCompletedRuleFixture;
+      sections: CommunityRuleSection[];
+    }
+  | null {
+  if (!isUseCaseDetailSlug(slug)) {
+    return null;
+  }
+  const fixture = getUseCaseCompletedRuleFixture(slug, completedRules);
+  const sections = buildUseCaseCompletedRuleSections(fixture);
+  if (sections.length === 0) {
+    return null;
+  }
+  return {
+    slug,
+    fixture,
+    sections,
+  };
+}