Something kind of working for this WaniKani cli app

index.ts

@@ -0,0 +1,194 @@
+import { LocalStorage } from "https://deno.land/x/storage@0.0.5/mod.ts";
+import * as Colors from "https://deno.land/std/fmt/colors.ts";
+import wanakana from 'https://cdn.esm.sh/v27/wanakana@4.0.2/esnext/wanakana.js';
+import { readKeypress } from "https://deno.land/x/keypress@0.0.7/mod.ts";
+import { Select, Input, Confirm } from "https://deno.land/x/cliffy/prompt/mod.ts";
+
+const API_BASE = "https://api.wanikani.com/v2";
+const store = new LocalStorage<string>();
+
+async function getToken() {
+  if (!store.get('token')) {
+    store.set({ token: await Input.prompt('Enter your API Token') });
+    store.save();
+  }
+}
+
+const wkFetch = (url: string, options = {}) =>
+  fetch(url, {
+    ...options,
+    headers: {
+      "Wanikani-Revision": "20170710",
+      Authorization: `Bearer ${store.get("token")}`,
+    },
+  });
+
+const subjects = JSON.parse(store.get('subjects') || '{}');
+
+const getSubject = async (id: number) => {
+  if (!subjects[id]) {
+    subjects[id] = await wkFetch(`${API_BASE}/subjects/${id}`).then((res) => res.json());
+    store.set('subjects', JSON.stringify(subjects));
+    store.save();
+  }
+
+  return subjects[id];
+}
+
+const getSummary = async () =>
+  await wkFetch(`${API_BASE}/summary`)
+    .then((res) => {
+      if (res.ok) {
+        return res.json();
+      } else {
+        throw "Error";
+      }
+    })
+
+function authError() {
+  console.error('Error authenticating.');
+  store.delete('token');
+}
+
+// const availableReviews = (summary: any) =>
+const availableNow = (type: string, summary: { data: any }) =>
+  summary.data[type].filter((rev: any) => {
+    const date = new Date(rev.available_at);
+    return date < new Date();
+  }).flatMap((e: { subject_ids: any }) => e.subject_ids);
+
+async function loop(summary: { data: any }) {
+  const reviews = availableNow("reviews", summary);
+  const lessons = availableNow("lessons", summary);
+  console.log("W A N I 🦀 🐊 K A N I");
+  console.log(Colors.red(lessons.length.toString() + " Lessons") + ' ' + Colors.blue(reviews.length.toString() + ' Reviews'));
+
+  const command: string = await Select.prompt({
+    message: "What would you like to do?",
+    options: [
+      { name: "Reviews", value: "reviews" },
+      { name: "Lessons", value: "lessons", disabled: true },
+      Select.separator("--------"),
+      { name: "Quit", value: "quit" },
+    ],
+  });
+
+  switch (command) {
+    case "quit":
+      break;
+    case "reviews":
+      await startReviews(reviews);
+      loop(summary);
+      break;
+    default:
+      loop(summary);
+  }
+}
+
+const startReviews = async (reviews: any) => {
+  const [first, ...rest] = reviews;
+  const subject = await getSubject(first);
+
+  try {
+    if (subject.object !== 'radical') {
+      const incorrectReadings = await readingPrompt(subject);
+      const audio = subject.data.pronunciation_audios?.[0].url;
+      if (audio) {
+        const cmd = Deno.run({ cmd: ["mpv", audio], stdout: "null", stderr: "null" }); // TODO
+        await cmd.status();
+        cmd.close();
+      }
+
+      if (!incorrectReadings) {
+        console.log("Correct!");
+      }
+    }
+    const incorrectMeanings = await meaningPrompt(subject);
+    if (!incorrectMeanings) {
+      console.log("Correct!");
+    }
+  } catch(e) {
+    console.log('error', e);
+    // TODO wrap up
+    // loop(summary);
+    return;
+  }
+
+  await startReviews(rest);
+}
+
+const readingPrompt = async (subject: any): Promise<number> => {
+  const { object, data: { characters, readings } } = subject;
+
+  console.log(`${characters} (${object} reading)`);
+
+  let input = '';
+  for await (const key of readKeypress()) {
+    if (key.key === 'return') {
+      break;
+    } else if (key.ctrlKey && key.key === 'c') {
+      throw 'Cancelled';
+    } else if (key.key === 'backspace') {
+      input = input.slice(0, -1);
+    } else {
+      input = input + key.sequence;
+    }
+
+    const kana = wanakana.toHiragana(input);
+    const text = new TextEncoder().encode('\r' + kana);
+    Deno.writeAll(Deno.stdout, text);
+  }
+  const reading = wanakana.toHiragana(input);
+
+  const text = new TextEncoder().encode('\r\n');
+  Deno.writeAll(Deno.stdout, text);
+
+  if (readings.find((r: any) => r.reading === reading && r.accepted_answer)) {
+    return 0;
+  } else if (readings.find((r: any) => r.reading === reading && !r.accepted_answer)) {
+    console.log('Looking for the other reading...');
+    return await readingPrompt(subject);
+  } else {
+    const tryAgain: boolean = await Confirm.prompt({ message: "Try again?", default: true });
+    if (!tryAgain) {
+      console.log(readings);
+      return 1;
+    } else {
+      return 1 + await readingPrompt(subject);
+    }
+  }
+};
+
+const meaningPrompt = async (subject: any): Promise<number> => {
+  const { object, data: { characters, meanings } } = subject;
+
+  console.log(`${characters} (${object} meaning)`);
+
+  const meaning = await Input.prompt('');
+
+  if (meanings.find((r: any) => r.meaning.toLowerCase() === meaning.toLowerCase() && r.accepted_answer)) {
+    return 0;
+  } else {
+    const tryAgain: boolean = await Confirm.prompt({ message: "Try again?", default: true });
+    if (!tryAgain) {
+      console.log(meanings);
+      return 1;
+    } else {
+      return 1 + await meaningPrompt(subject);
+    }
+  }
+};
+
+async function start() {
+  await getToken();
+
+  try {
+    const summary = await getSummary();
+    loop(summary);
+  } catch(e) {
+    authError();
+    start();
+  }
+}
+
+start();