✨ 楽天ブックス書籍検索APIのAPIエンドポイントを作成

package.json

@@ -12,11 +12,13 @@
     "@headlessui/react": "^1.3.0",
     "@supabase/supabase-js": "^1.18.0",
     "@supabase/ui": "0.27.3",
+    "moji": "^0.5.1",
     "next": "11.0.1",
     "react": "17.0.2",
     "react-dom": "17.0.2"
   },
   "devDependencies": {
+    "@types/moji": "^0.5.0",
     "@types/react": "17.0.11",
     "autoprefixer": "^10.2.6",
     "eslint": "7.29.0",

src/pages/api/rakuten.ts

@@ -0,0 +1,107 @@
+import moji from "moji";
+import type { NextApiRequest, NextApiResponse } from "next";
+
+const compare = (a: bookData, b: bookData) => {
+  if (a.title < b.title) {
+    return -1;
+  } else {
+    return 1;
+  }
+};
+
+type rakutenItem = {
+  Item: bookItem;
+};
+
+type bookItem = {
+  title: string;
+  author: string;
+  publisherName: string;
+  largeImageUrl: string;
+  isbn: string;
+};
+
+export type bookData = {
+  title: string;
+  author: string;
+  publisherName: string;
+  imageUrl: string;
+  isbn: string;
+};
+
+const convertToUtf8 = (text: string) => {
+  return unescape(encodeURIComponent(text));
+};
+
+const extractData = (item: rakutenItem) => {
+  let titleString = item.Item.title;
+  titleString = moji(titleString).convert("ZE", "HE").toString();
+  titleString = moji(titleString).convert("ZS", "HS").toString();
+  let authorString = item.Item.author;
+  authorString = moji(authorString).convert("ZE", "HE").toString();
+  authorString = moji(authorString).convert("ZS", "HS").reject("HS").toString();
+  const data: bookData = {
+    title: titleString,
+    author: authorString,
+    publisherName: item.Item.publisherName,
+    imageUrl: item.Item.largeImageUrl,
+    isbn: item.Item.isbn,
+  };
+  return data;
+};
+
+const Rakuten = async (req: NextApiRequest, res: NextApiResponse) => {
+  let url =
+    "https://app.rakuten.co.jp/services/api/BooksBook/Search/20170404?applicationId=" +
+    process.env.RAKUTEN_APP_ID +
+    "&booksGenreId=001001";
+
+  let { title } = req.query;
+  if (title) {
+    title = title.toString();
+    url += "&title=" + convertToUtf8(title);
+  }
+
+  let { author } = req.query;
+  if (author) {
+    author = author.toString();
+    url += "&author=" + convertToUtf8(author);
+  }
+
+  if (title || author) {
+    let bookList: bookData[] = [];
+    let count = -1;
+    const response = await fetch(url);
+    const data = await response.json();
+    if (data) {
+      data.Items.map((item: rakutenItem) => {
+        bookList = [...bookList, extractData(item)];
+      });
+      count = data.count;
+
+      for (let i = 1; i < data.pageCount; i++) {
+        await new Promise((resolve) => setTimeout(resolve, 300));
+        const response = await fetch(url + "&page=" + (i + 1));
+        const data = await response.json();
+        if (data) {
+          data.Items.map((item: rakutenItem) => {
+            bookList = [...bookList, extractData(item)];
+          });
+        }
+      }
+    }
+
+    if (count != bookList.length) {
+      res.status(500).json({ massege: "Error: Rakuten Book API." });
+    } else {
+      bookList.sort(compare);
+      res.status(200).json({ data: bookList, size: count });
+    }
+  } else {
+    res
+      .status(500)
+      .json({ massege: "Error: Please set title or author to query." });
+  }
+};
+
+export default Rakuten;

yarn.lock

@@ -223,6 +223,11 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha1-7ihweulOEdK4J7y+UnC86n8+ce4=
 
+"@types/moji@^0.5.0":
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/@types/moji/-/moji-0.5.0.tgz#4b68f789702baeb9aa5482ea68191ca4080c8b2b"
+  integrity sha512-oZhMgrG0iv5u1yICABzV4NrlpGOE7hNapc3atIMiQ1ebWOTkay/x1eMYbQPXjCxxk14Td3cqy7S+kvmGdE7NGA==
+
 "@types/node@*":
   version "15.12.5"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-15.12.5.tgz#9a78318a45d75c9523d2396131bd3cca54b2d185"
@@ -2232,6 +2237,13 @@ modern-normalize@^1.1.0:
   resolved "https://registry.yarnpkg.com/modern-normalize/-/modern-normalize-1.1.0.tgz#da8e80140d9221426bd4f725c6e11283d34f90b7"
   integrity sha512-2lMlY1Yc1+CUy0gw4H95uNN7vjbpoED7NNRSBHE25nWfLBdmMzFCsPshlzbxHz+gYMcBEUN8V4pU16prcdPSgA==
 
+moji@^0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/moji/-/moji-0.5.1.tgz#088eecd1c22c8f31a240adcf9c95e54f33eb54fb"
+  integrity sha1-CI7s0cIsjzGiQK3PnJXlTzPrVPs=
+  dependencies:
+    object-assign "^3.0.0"
+
 [email protected]:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
@@ -2403,6 +2415,11 @@ normalize-range@^0.1.2:
   resolved "https://registry.yarnpkg.com/normalize-range/-/normalize-range-0.1.2.tgz#2d10c06bdfd312ea9777695a4d28439456b75942"
   integrity sha1-LRDAa9/TEuqXd2laTShDlFa3WUI=
 
+object-assign@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-3.0.0.tgz#9bedd5ca0897949bca47e7ff408062d549f587f2"
+  integrity sha1-m+3VygiXlJvKR+f/QIBi1Un1h/I=
+
 object-assign@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"