✨ Implement wrappers of /api/embed-text/url

Author: takker99

deps/scrapbox.ts

@@ -1,8 +1,10 @@
 export type {
+  BadRequestError,
   ErrorLike,
   ExportedData,
   GuestUser,
   ImportedData,
+  InvalidURLError,
   MemberProject,
   MemberUser,
   NotFoundError,
@@ -14,7 +16,9 @@ export type {
   PageList,
   Scrapbox,
   SearchedTitle,
-} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.0.8/mod.ts";
-import type { Page } from "https://raw.githubusercontent.com/scrapbox-jp/types/0.0.8/mod.ts";
+  SessionError,
+  TweetInfo,
+} from "https://raw.githubusercontent.com/scrapbox-jp/types/0.1.2/mod.ts";
+import type { Page } from "https://raw.githubusercontent.com/scrapbox-jp/types/0.1.2/mod.ts";
 export * from "https://esm.sh/@progfay/[email protected]";
 export type Line = Page["lines"][0];

rest/getWebPageTitle.ts

@@ -0,0 +1,75 @@
+import type {
+  BadRequestError,
+  InvalidURLError,
+  SessionError,
+} from "../deps/scrapbox.ts";
+import { cookie, getCSRFToken } from "./auth.ts";
+import { UnexpectedResponseError } from "./error.ts";
+import { tryToErrorLike } from "../is.ts";
+import { ExtendedOptions, Result, setDefaults } from "./util.ts";
+
+/** 指定したURLのweb pageのtitleをscrapboxのserver経由で取得する
+ *
+ * @param url 取得したいURL
+ * @param init connect.sidなど
+ * @return web pageのtilte
+ */
+export const getWebPageTitle = async (
+  url: string | URL,
+  init?: ExtendedOptions,
+): Promise<
+  Result<
+    string,
+    | SessionError
+    | InvalidURLError
+    | BadRequestError
+  >
+> => {
+  const { sid, hostName, fetch, csrf } = setDefaults(init ?? {});
+  const path = `https://${hostName}/api/embed-text/url?url=${
+    encodeURIComponent(url.toString())
+  }`;
+
+  const res = await fetch(
+    path,
+    {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json;charset=utf-8",
+        "X-CSRF-TOKEN": csrf ?? await getCSRFToken(init),
+        ...(sid ? { Cookie: cookie(sid) } : {}),
+      },
+      body: JSON.stringify({ timeout: 3000 }),
+    },
+  );
+
+  if (!res.ok) {
+    if (res.status === 422) {
+      return {
+        ok: false,
+        value: {
+          name: "InvalidURLError",
+          message: (await res.json()).message as string,
+        },
+      };
+    }
+    const text = await res.json();
+    const value = tryToErrorLike(text);
+    if (!value) {
+      throw new UnexpectedResponseError({
+        path: new URL(path),
+        ...res,
+        body: await res.text(),
+      });
+    }
+    return {
+      ok: false,
+      value: value as
+        | SessionError
+        | BadRequestError,
+    };
+  }
+
+  const { title } = (await res.json()) as { title: string };
+  return { ok: true, value: title };
+};