refactor: extract vcard parsing helper

src/web/vcard.ts

@@ -0,0 +1,58 @@
+type ParsedVcard = {
+  name?: string;
+  phones: string[];
+};
+
+const ALLOWED_VCARD_KEYS = new Set(["FN", "N", "TEL"]);
+
+export function parseVcard(vcard?: string): ParsedVcard {
+  if (!vcard) return { phones: [] };
+  const lines = vcard.split(/\r?\n/);
+  let nameFromN: string | undefined;
+  let nameFromFn: string | undefined;
+  const phones: string[] = [];
+  for (const rawLine of lines) {
+    const line = rawLine.trim();
+    if (!line) continue;
+    const colonIndex = line.indexOf(":");
+    if (colonIndex === -1) continue;
+    const key = line.slice(0, colonIndex).toUpperCase();
+    const rawValue = line.slice(colonIndex + 1).trim();
+    if (!rawValue) continue;
+    const baseKey = normalizeVcardKey(key);
+    if (!baseKey || !ALLOWED_VCARD_KEYS.has(baseKey)) continue;
+    const value = cleanVcardValue(rawValue);
+    if (!value) continue;
+    if (baseKey === "FN" && !nameFromFn) {
+      nameFromFn = normalizeVcardName(value);
+      continue;
+    }
+    if (baseKey === "N" && !nameFromN) {
+      nameFromN = normalizeVcardName(value);
+      continue;
+    }
+    if (baseKey === "TEL") {
+      phones.push(value);
+    }
+  }
+  return { name: nameFromFn ?? nameFromN, phones };
+}
+
+function normalizeVcardKey(key: string): string | undefined {
+  const [primary] = key.split(";");
+  if (!primary) return undefined;
+  const segments = primary.split(".");
+  return segments[segments.length - 1] || undefined;
+}
+
+function cleanVcardValue(value: string): string {
+  return value
+    .replace(/\\n/gi, " ")
+    .replace(/\\,/g, ",")
+    .replace(/\\;/g, ";")
+    .trim();
+}
+
+function normalizeVcardName(value: string): string {
+  return value.replace(/;/g, " ").replace(/\s+/g, " ").trim();
+}