Send the invitation as a light letter that names the community, the inviter by email, and who can read the Rule.

lib/create/ruleInviteCardMeta.ts

@@ -0,0 +1,56 @@
+import { parsePublishedDocumentForCommunityRuleDisplay } from "./publishedDocumentToDisplaySections";
+import { RULE_SECTION_CATEGORY } from "./ruleSectionsFromMethodSelections";
+import sharedTerms from "../../messages/en/create/sharedTerms.json";
+
+const DESCRIPTION_MAX = 140;
+
+/** Initials for the invite email disc when the group has no photo. */
+export function communityInviteInitials(name: string): string {
+  const words = name
+    .trim()
+    .split(/\s+/)
+    .filter((word) => word.length > 0);
+  if (words.length === 0) return "·";
+  if (words.length === 1) {
+    const word = words[0] ?? "";
+    return word.slice(0, 2).toUpperCase();
+  }
+  const first = words[0]?.charAt(0) ?? "";
+  const second = words[1]?.charAt(0) ?? "";
+  return `${first}${second}`.toUpperCase();
+}
+
+/** Possessive for footer copy (`Share’s` / `Members’`). */
+export function communityPossessive(name: string): string {
+  const trimmed = name.trim();
+  if (trimmed.length === 0) return "this community’s";
+  if (/s$/i.test(trimmed)) return `${trimmed}’`;
+  return `${trimmed}’s`;
+}
+
+/** Community description on the invite card, cut at 140 characters. */
+export function clipCommunityInviteDescription(
+  raw: string | null | undefined,
+): string {
+  const trimmed = typeof raw === "string" ? raw.trim() : "";
+  if (trimmed.length <= DESCRIPTION_MAX) return trimmed;
+  return trimmed.slice(0, DESCRIPTION_MAX).trimEnd();
+}
+
+/** Tag on the invite Rule card (`3 VALUES AND 6 CARDS`). Shared terms do not count. */
+export function inviteRuleCountsLabel(document: unknown): string {
+  const sections = parsePublishedDocumentForCommunityRuleDisplay(document);
+  let values = 0;
+  let cards = 0;
+  for (const section of sections) {
+    const n = section.entries.length;
+    if (section.categoryName === RULE_SECTION_CATEGORY.values) {
+      values += n;
+    } else if (section.categoryName !== sharedTerms.sectionTitle) {
+      cards += n;
+    }
+  }
+  const valuePart = values === 1 ? "1 VALUE" : `${values} VALUES`;
+  const cardPart = cards === 1 ? "1 CARD" : `${cards} CARDS`;
+  return `${valuePart} AND ${cardPart}`;
+}