Add configurable homepage social links

lib/site-settings.ts

@@ -0,0 +1,89 @@
+import { getDb } from "@/lib/mongo";
+import { SiteSettings, SocialLink } from "@/types/site";
+
+const SETTINGS_COLLECTION = "settings";
+const SITE_SETTINGS_ID = "site";
+
+type SiteSettingsDocument = {
+  _id: string;
+  socialLinks?: SocialLink[];
+};
+
+const DEFAULT_SOCIAL_LINKS: SocialLink[] = [
+  {
+    id: "github",
+    label: "GitHub",
+    url: "",
+    iconUrl: ""
+  },
+  {
+    id: "bilibili",
+    label: "B站",
+    url: "",
+    iconUrl: ""
+  }
+];
+
+function normalizeSocialLink(link: any, index: number): SocialLink | null {
+  if (!link || typeof link !== "object") {
+    return null;
+  }
+
+  const label = typeof link.label === "string" ? link.label.trim() : "";
+  const url = typeof link.url === "string" ? link.url.trim() : "";
+  const iconUrl = typeof link.iconUrl === "string" ? link.iconUrl.trim() : "";
+  const id =
+    typeof link.id === "string" && link.id.trim()
+      ? link.id.trim()
+      : `social-link-${index + 1}`;
+
+  if (!label && !url && !iconUrl) {
+    return null;
+  }
+
+  return {
+    id,
+    label: label || `链接 ${index + 1}`,
+    url,
+    iconUrl
+  };
+}
+
+function getSettingsCollection() {
+  return getDb().then((db) => db.collection<SiteSettingsDocument>(SETTINGS_COLLECTION));
+}
+
+export function getDefaultSocialLinks() {
+  return DEFAULT_SOCIAL_LINKS.map((item) => ({ ...item }));
+}
+
+export function normalizeSiteSettings(doc?: Partial<SiteSettingsDocument> | null): SiteSettings {
+  const socialLinks = Array.isArray(doc?.socialLinks)
+    ? doc.socialLinks
+        .map((item: any, index: number) => normalizeSocialLink(item, index))
+        .filter(Boolean)
+    : [];
+
+  return {
+    socialLinks: socialLinks.length > 0 ? (socialLinks as SocialLink[]) : getDefaultSocialLinks()
+  };
+}
+
+export async function getSiteSettings(): Promise<SiteSettings> {
+  const collection = await getSettingsCollection();
+  const doc = await collection.findOne({ _id: SITE_SETTINGS_ID });
+  return normalizeSiteSettings(doc);
+}
+
+export async function updateSiteSettings(settings: SiteSettings) {
+  const collection = await getSettingsCollection();
+  await collection.updateOne(
+    { _id: SITE_SETTINGS_ID },
+    {
+      $set: {
+        socialLinks: settings.socialLinks
+      }
+    },
+    { upsert: true }
+  );
+}