classroom-instruments/dist/workbox-27b29e6f.js

define(['exports'], function (t) {
  'use strict';
  try {
    self['workbox:core:7.0.0'] && _();
  } catch (t) {}
  const e = (t, ...e) => {
    let s = t;
    return e.length > 0 && (s += ` :: ${JSON.stringify(e)}`), s;
  };
  class s extends Error {
    constructor(t, s) {
      super(e(t, s)), (this.name = t), (this.details = s);
    }
  }
  try {
    self['workbox:routing:7.0.0'] && _();
  } catch (t) {}
  const n = t => (t && 'object' == typeof t ? t : { handle: t });
  class i {
    constructor(t, e, s = 'GET') {
      (this.handler = n(e)), (this.match = t), (this.method = s);
    }
    setCatchHandler(t) {
      this.catchHandler = n(t);
    }
  }
  class r extends i {
    constructor(t, e, s) {
      super(
        ({ url: e }) => {
          const s = t.exec(e.href);
          if (s && (e.origin === location.origin || 0 === s.index))
            return s.slice(1);
        },
        e,
        s
      );
    }
  }
  class o {
    constructor() {
      (this.t = new Map()), (this.i = new Map());
    }
    get routes() {
      return this.t;
    }
    addFetchListener() {
      self.addEventListener('fetch', t => {
        const { request: e } = t,
          s = this.handleRequest({ request: e, event: t });
        s && t.respondWith(s);
      });
    }
    addCacheListener() {
      self.addEventListener('message', t => {
        if (t.data && 'CACHE_URLS' === t.data.type) {
          const { payload: e } = t.data,
            s = Promise.all(
              e.urlsToCache.map(e => {
                'string' == typeof e && (e = [e]);
                const s = new Request(...e);
                return this.handleRequest({ request: s, event: t });
              })
            );
          t.waitUntil(s),
            t.ports && t.ports[0] && s.then(() => t.ports[0].postMessage(!0));
        }
      });
    }
    handleRequest({ request: t, event: e }) {
      const s = new URL(t.url, location.href);
      if (!s.protocol.startsWith('http')) return;
      const n = s.origin === location.origin,
        { params: i, route: r } = this.findMatchingRoute({
          event: e,
          request: t,
          sameOrigin: n,
          url: s
        });
      let o = r && r.handler;
      const c = t.method;
      if ((!o && this.i.has(c) && (o = this.i.get(c)), !o)) return;
      let a;
      try {
        a = o.handle({ url: s, request: t, event: e, params: i });
      } catch (t) {
        a = Promise.reject(t);
      }
      const h = r && r.catchHandler;
      return (
        a instanceof Promise &&
          (this.o || h) &&
          (a = a.catch(async n => {
            if (h)
              try {
                return await h.handle({
                  url: s,
                  request: t,
                  event: e,
                  params: i
                });
              } catch (t) {
                t instanceof Error && (n = t);
              }
            if (this.o) return this.o.handle({ url: s, request: t, event: e });
            throw n;
          })),
        a
      );
    }
    findMatchingRoute({ url: t, sameOrigin: e, request: s, event: n }) {
      const i = this.t.get(s.method) || [];
      for (const r of i) {
        let i;
        const o = r.match({ url: t, sameOrigin: e, request: s, event: n });
        if (o)
          return (
            (i = o),
            ((Array.isArray(i) && 0 === i.length) ||
              (o.constructor === Object && 0 === Object.keys(o).length) ||
              'boolean' == typeof o) &&
              (i = void 0),
            { route: r, params: i }
          );
      }
      return {};
    }
    setDefaultHandler(t, e = 'GET') {
      this.i.set(e, n(t));
    }
    setCatchHandler(t) {
      this.o = n(t);
    }
    registerRoute(t) {
      this.t.has(t.method) || this.t.set(t.method, []),
        this.t.get(t.method).push(t);
    }
    unregisterRoute(t) {
      if (!this.t.has(t.method))
        throw new s('unregister-route-but-not-found-with-method', {
          method: t.method
        });
      const e = this.t.get(t.method).indexOf(t);
      if (!(e > -1)) throw new s('unregister-route-route-not-registered');
      this.t.get(t.method).splice(e, 1);
    }
  }
  let c;
  const a = () => (
    c || ((c = new o()), c.addFetchListener(), c.addCacheListener()), c
  );
  function h(t, e, n) {
    let o;
    if ('string' == typeof t) {
      const s = new URL(t, location.href);
      o = new i(({ url: t }) => t.href === s.href, e, n);
    } else if (t instanceof RegExp) o = new r(t, e, n);
    else if ('function' == typeof t) o = new i(t, e, n);
    else {
      if (!(t instanceof i))
        throw new s('unsupported-route-type', {
          moduleName: 'workbox-routing',
          funcName: 'registerRoute',
          paramName: 'capture'
        });
      o = t;
    }
    return a().registerRoute(o), o;
  }
  const u = {
      googleAnalytics: 'googleAnalytics',
      precache: 'precache-v2',
      prefix: 'workbox',
      runtime: 'runtime',
      suffix: 'undefined' != typeof registration ? registration.scope : ''
    },
    l = t => [u.prefix, t, u.suffix].filter(t => t && t.length > 0).join('-'),
    f = t => t || l(u.precache),
    w = t => t || l(u.runtime);
  function d(t, e) {
    const s = e();
    return t.waitUntil(s), s;
  }
  try {
    self['workbox:precaching:7.0.0'] && _();
  } catch (t) {}
  function p(t) {
    if (!t) throw new s('add-to-cache-list-unexpected-type', { entry: t });
    if ('string' == typeof t) {
      const e = new URL(t, location.href);
      return { cacheKey: e.href, url: e.href };
    }
    const { revision: e, url: n } = t;
    if (!n) throw new s('add-to-cache-list-unexpected-type', { entry: t });
    if (!e) {
      const t = new URL(n, location.href);
      return { cacheKey: t.href, url: t.href };
    }
    const i = new URL(n, location.href),
      r = new URL(n, location.href);
    return (
      i.searchParams.set('__WB_REVISION__', e),
      { cacheKey: i.href, url: r.href }
    );
  }
  class y {
    constructor() {
      (this.updatedURLs = []),
        (this.notUpdatedURLs = []),
        (this.handlerWillStart = async ({ request: t, state: e }) => {
          e && (e.originalRequest = t);
        }),
        (this.cachedResponseWillBeUsed = async ({
          event: t,
          state: e,
          cachedResponse: s
        }) => {
          if (
            'install' === t.type &&
            e &&
            e.originalRequest &&
            e.originalRequest instanceof Request
          ) {
            const t = e.originalRequest.url;
            s ? this.notUpdatedURLs.push(t) : this.updatedURLs.push(t);
          }
          return s;
        });
    }
  }
  class g {
    constructor({ precacheController: t }) {
      (this.cacheKeyWillBeUsed = async ({ request: t, params: e }) => {
        const s =
          (null == e ? void 0 : e.cacheKey) || this.h.getCacheKeyForURL(t.url);
        return s ? new Request(s, { headers: t.headers }) : t;
      }),
        (this.h = t);
    }
  }
  let R;
  async function m(t, e) {
    let n = null;
    if (t.url) {
      n = new URL(t.url).origin;
    }
    if (n !== self.location.origin)
      throw new s('cross-origin-copy-response', { origin: n });
    const i = t.clone(),
      r = {
        headers: new Headers(i.headers),
        status: i.status,
        statusText: i.statusText
      },
      o = e ? e(r) : r,
      c = (function () {
        if (void 0 === R) {
          const t = new Response('');
          if ('body' in t)
            try {
              new Response(t.body), (R = !0);
            } catch (t) {
              R = !1;
            }
          R = !1;
        }
        return R;
      })()
        ? i.body
        : await i.blob();
    return new Response(c, o);
  }
  function v(t, e) {
    const s = new URL(t);
    for (const t of e) s.searchParams.delete(t);
    return s.href;
  }
  class q {
    constructor() {
      this.promise = new Promise((t, e) => {
        (this.resolve = t), (this.reject = e);
      });
    }
  }
  const U = new Set();
  try {
    self['workbox:strategies:7.0.0'] && _();
  } catch (t) {}
  function L(t) {
    return 'string' == typeof t ? new Request(t) : t;
  }
  class b {
    constructor(t, e) {
      (this.u = {}),
        Object.assign(this, e),
        (this.event = e.event),
        (this.l = t),
        (this.p = new q()),
        (this.g = []),
        (this.R = [...t.plugins]),
        (this.m = new Map());
      for (const t of this.R) this.m.set(t, {});
      this.event.waitUntil(this.p.promise);
    }
    async fetch(t) {
      const { event: e } = this;
      let n = L(t);

      // 检查预加载响应
      if ("navigate" === n.mode && e instanceof FetchEvent && e.preloadResponse) {
          const t = await e.preloadResponse;
          if (t) return t;
      }

      const i = this.hasCallback("fetchDidFail") ? n.clone() : null;

      try {
          // 执行 requestWillFetch 回调
          for (const t of this.iterateCallbacks("requestWillFetch")) {
              n = await t({
                  request: n.clone(),
                  event: e
              });
          }
      } catch (t) {
          if (t instanceof Error) {
              console.error("requestWillFetch error:", t);
              throw new s("plugin-error-request-will-fetch", {
                  thrownErrorMessage: t.message
              });
          }
      }

      const r = n.clone();

      try {
          // 发起 fetch 请求
          let t = await fetch(n, "navigate" === n.mode ? void 0 : this.l.fetchOptions);

          // 执行 fetchDidSucceed 回调
          for (const s of this.iterateCallbacks("fetchDidSucceed")) {
              t = await s({
                  event: e,
                  request: r,
                  response: t
              });
          }

          return t;
      } catch (t) {
          console.error("Fetch failed:", t);

          // 执行 fetchDidFail 回调
          if (i) {
              await this.runCallbacks("fetchDidFail", {
                  error: t,
                  event: e,
                  originalRequest: i.clone(),
                  request: r.clone()
              });
          }

          throw t;
      }
  }
    async fetchAndCachePut(t) {
      const e = await this.fetch(t),
        s = e.clone();
      return this.waitUntil(this.cachePut(t, s)), e;
    }
    async cacheMatch(t) {
      const e = L(t);
      let s;
      const { cacheName: n, matchOptions: i } = this.l,
        r = await this.getCacheKey(e, 'read'),
        o = Object.assign(Object.assign({}, i), { cacheName: n });
      s = await caches.match(r, o);
      for (const t of this.iterateCallbacks('cachedResponseWillBeUsed'))
        s =
          (await t({
            cacheName: n,
            matchOptions: i,
            cachedResponse: s,
            request: r,
            event: this.event
          })) || void 0;
      return s;
    }
    async cachePut(t, e) {
      const n = L(t);
      var i;
      await ((i = 0), new Promise(t => setTimeout(t, i)));
      const r = await this.getCacheKey(n, 'write');
      if (!e)
        throw new s('cache-put-with-no-response', {
          url:
            ((o = r.url),
            new URL(String(o), location.href).href.replace(
              new RegExp(`^${location.origin}`),
              ''
            ))
        });
      var o;
      const c = await this.v(e);
      if (!c) return !1;
      const { cacheName: a, matchOptions: h } = this.l,
        u = await self.caches.open(a),
        l = this.hasCallback('cacheDidUpdate'),
        f = l
          ? await (async function (t, e, s, n) {
              const i = v(e.url, s);
              if (e.url === i) return t.match(e, n);
              const r = Object.assign(Object.assign({}, n), {
                  ignoreSearch: !0
                }),
                o = await t.keys(e, r);
              for (const e of o) if (i === v(e.url, s)) return t.match(e, n);
            })(u, r.clone(), ['__WB_REVISION__'], h)
          : null;
      try {
        await u.put(r, l ? c.clone() : c);
      } catch (t) {
        if (t instanceof Error)
          throw (
            ('QuotaExceededError' === t.name &&
              (await (async function () {
                for (const t of U) await t();
              })()),
            t)
          );
      }
      for (const t of this.iterateCallbacks('cacheDidUpdate'))
        await t({
          cacheName: a,
          oldResponse: f,
          newResponse: c.clone(),
          request: r,
          event: this.event
        });
      return !0;
    }
    async getCacheKey(t, e) {
      const s = `${t.url} | ${e}`;
      if (!this.u[s]) {
        let n = t;
        for (const t of this.iterateCallbacks('cacheKeyWillBeUsed'))
          n = L(
            await t({
              mode: e,
              request: n,
              event: this.event,
              params: this.params
            })
          );
        this.u[s] = n;
      }
      return this.u[s];
    }
    hasCallback(t) {
      for (const e of this.l.plugins) if (t in e) return !0;
      return !1;
    }
    async runCallbacks(t, e) {
      for (const s of this.iterateCallbacks(t)) await s(e);
    }
    *iterateCallbacks(t) {
      for (const e of this.l.plugins)
        if ('function' == typeof e[t]) {
          const s = this.m.get(e),
            n = n => {
              const i = Object.assign(Object.assign({}, n), { state: s });
              return e[t](i);
            };
          yield n;
        }
    }
    waitUntil(t) {
      return this.g.push(t), t;
    }
    async doneWaiting() {
      let t;
      for (; (t = this.g.shift()); ) await t;
    }
    destroy() {
      this.p.resolve(null);
    }
    async v(t) {
      let e = t,
        s = !1;
      for (const t of this.iterateCallbacks('cacheWillUpdate'))
        if (
          ((e =
            (await t({
              request: this.request,
              response: e,
              event: this.event
            })) || void 0),
          (s = !0),
          !e)
        )
          break;
      return s || (e && 200 !== e.status && (e = void 0)), e;
    }
  }
  class C {
    constructor(t = {}) {
      (this.cacheName = w(t.cacheName)),
        (this.plugins = t.plugins || []),
        (this.fetchOptions = t.fetchOptions),
        (this.matchOptions = t.matchOptions);
    }
    handle(t) {
      const [e] = this.handleAll(t);
      return e;
    }
    handleAll(t) {
      t instanceof FetchEvent && (t = { event: t, request: t.request });
      const e = t.event,
        s = 'string' == typeof t.request ? new Request(t.request) : t.request,
        n = 'params' in t ? t.params : void 0,
        i = new b(this, { event: e, request: s, params: n }),
        r = this.q(i, s, e);
      return [r, this.U(r, i, s, e)];
    }
    async q(t, e, n) {
      let i;
      await t.runCallbacks('handlerWillStart', { event: n, request: e });
      try {
        if (((i = await this.L(e, t)), !i || 'error' === i.type))
          throw new s('no-response', { url: e.url });
      } catch (s) {
        if (s instanceof Error)
          for (const r of t.iterateCallbacks('handlerDidError'))
            if (((i = await r({ error: s, event: n, request: e })), i)) break;
        if (!i) throw s;
      }
      for (const s of t.iterateCallbacks('handlerWillRespond'))
        i = await s({ event: n, request: e, response: i });
      return i;
    }
    async U(t, e, s, n) {
      let i, r;
      try {
        i = await t;
      } catch (r) {}
      try {
        await e.runCallbacks('handlerDidRespond', {
          event: n,
          request: s,
          response: i
        }),
          await e.doneWaiting();
      } catch (t) {
        t instanceof Error && (r = t);
      }
      if (
        (await e.runCallbacks('handlerDidComplete', {
          event: n,
          request: s,
          response: i,
          error: r
        }),
        e.destroy(),
        r)
      )
        throw r;
    }
  }
  class E extends C {
    constructor(t = {}) {
      (t.cacheName = f(t.cacheName)),
        super(t),
        (this._ = !1 !== t.fallbackToNetwork),
        this.plugins.push(E.copyRedirectedCacheableResponsesPlugin);
    }
    async L(t, e) {
      const s = await e.cacheMatch(t);
      return (
        s ||
        (e.event && 'install' === e.event.type
          ? await this.C(t, e)
          : await this.O(t, e))
      );
    }
    async O(t, e) {
      let n;
      const i = e.params || {};
      if (!this._)
        throw new s('missing-precache-entry', {
          cacheName: this.cacheName,
          url: t.url
        });
      {
        const s = i.integrity,
          r = t.integrity,
          o = !r || r === s;
        (n = await e.fetch(
          new Request(t, { integrity: 'no-cors' !== t.mode ? r || s : void 0 })
        )),
          s &&
            o &&
            'no-cors' !== t.mode &&
            (this.N(), await e.cachePut(t, n.clone()));
      }
      return n;
    }
    async C(t, e) {
      this.N();
      const n = await e.fetch(t);
      if (!(await e.cachePut(t, n.clone())))
        throw new s('bad-precaching-response', {
          url: t.url,
          status: n.status
        });
      return n;
    }
    N() {
      let t = null,
        e = 0;
      for (const [s, n] of this.plugins.entries())
        n !== E.copyRedirectedCacheableResponsesPlugin &&
          (n === E.defaultPrecacheCacheabilityPlugin && (t = s),
          n.cacheWillUpdate && e++);
      0 === e
        ? this.plugins.push(E.defaultPrecacheCacheabilityPlugin)
        : e > 1 && null !== t && this.plugins.splice(t, 1);
    }
  }
  (E.defaultPrecacheCacheabilityPlugin = {
    cacheWillUpdate: async ({ response: t }) =>
      !t || t.status >= 400 ? null : t
  }),
    (E.copyRedirectedCacheableResponsesPlugin = {
      cacheWillUpdate: async ({ response: t }) =>
        t.redirected ? await m(t) : t
    });
  class O {
    constructor({
      cacheName: t,
      plugins: e = [],
      fallbackToNetwork: s = !0
    } = {}) {
      (this.k = new Map()),
        (this.K = new Map()),
        (this.P = new Map()),
        (this.l = new E({
          cacheName: f(t),
          plugins: [...e, new g({ precacheController: this })],
          fallbackToNetwork: s
        })),
        (this.install = this.install.bind(this)),
        (this.activate = this.activate.bind(this));
    }
    get strategy() {
      return this.l;
    }
    precache(t) {
      this.addToCacheList(t),
        this.T ||
          (self.addEventListener('install', this.install),
          self.addEventListener('activate', this.activate),
          (this.T = !0));
    }
    addToCacheList(t) {
      const e = [];
      for (const n of t) {
        'string' == typeof n
          ? e.push(n)
          : n && void 0 === n.revision && e.push(n.url);
        const { cacheKey: t, url: i } = p(n),
          r = 'string' != typeof n && n.revision ? 'reload' : 'default';
        if (this.k.has(i) && this.k.get(i) !== t)
          throw new s('add-to-cache-list-conflicting-entries', {
            firstEntry: this.k.get(i),
            secondEntry: t
          });
        if ('string' != typeof n && n.integrity) {
          if (this.P.has(t) && this.P.get(t) !== n.integrity)
            throw new s('add-to-cache-list-conflicting-integrities', {
              url: i
            });
          this.P.set(t, n.integrity);
        }
        if ((this.k.set(i, t), this.K.set(i, r), e.length > 0)) {
          const t = `Workbox is precaching URLs without revision info: ${e.join(
            ', '
          )}\nThis is generally NOT safe. Learn more at https://bit.ly/wb-precache`;
          console.warn(t);
        }
      }
    }
    install(t) {
      return d(t, async () => {
        const e = new y();
        this.strategy.plugins.push(e);
        for (const [e, s] of this.k) {
          const n = this.P.get(s),
            i = this.K.get(e),
            r = new Request(e, {
              integrity: n,
              cache: i,
              credentials: 'same-origin'
            });
          await Promise.all(
            this.strategy.handleAll({
              params: { cacheKey: s },
              request: r,
              event: t
            })
          );
        }
        const { updatedURLs: s, notUpdatedURLs: n } = e;
        return { updatedURLs: s, notUpdatedURLs: n };
      });
    }
    activate(t) {
      return d(t, async () => {
        const t = await self.caches.open(this.strategy.cacheName),
          e = await t.keys(),
          s = new Set(this.k.values()),
          n = [];
        for (const i of e) s.has(i.url) || (await t.delete(i), n.push(i.url));
        return { deletedURLs: n };
      });
    }
    getURLsToCacheKeys() {
      return this.k;
    }
    getCachedURLs() {
      return [...this.k.keys()];
    }
    getCacheKeyForURL(t) {
      const e = new URL(t, location.href);
      return this.k.get(e.href);
    }
    getIntegrityForCacheKey(t) {
      return this.P.get(t);
    }
    async matchPrecache(t) {
      const e = t instanceof Request ? t.url : t,
        s = this.getCacheKeyForURL(e);
      if (s) {
        return (await self.caches.open(this.strategy.cacheName)).match(s);
      }
    }
    createHandlerBoundToURL(t) {
      const e = this.getCacheKeyForURL(t);
      if (!e) throw new s('non-precached-url', { url: t });
      return s => (
        (s.request = new Request(t)),
        (s.params = Object.assign({ cacheKey: e }, s.params)),
        this.strategy.handle(s)
      );
    }
  }
  let x;
  const N = () => (x || (x = new O()), x);
  class k extends i {
    constructor(t, e) {
      super(({ request: s }) => {
        const n = t.getURLsToCacheKeys();
        for (const i of (function* (
          t,
          {
            ignoreURLParametersMatching: e = [/^utm_/, /^fbclid$/],
            directoryIndex: s = 'index.html',
            cleanURLs: n = !0,
            urlManipulation: i
          } = {}
        ) {
          const r = new URL(t, location.href);
          (r.hash = ''), yield r.href;
          const o = (function (t, e = []) {
            for (const s of [...t.searchParams.keys()])
              e.some(t => t.test(s)) && t.searchParams.delete(s);
            return t;
          })(r, e);
          if ((yield o.href, s && o.pathname.endsWith('/'))) {
            const t = new URL(o.href);
            (t.pathname += s), yield t.href;
          }
          if (n) {
            const t = new URL(o.href);
            (t.pathname += '.html'), yield t.href;
          }
          if (i) {
            const t = i({ url: r });
            for (const e of t) yield e.href;
          }
        })(s.url, e)) {
          const e = n.get(i);
          if (e) {
            return { cacheKey: e, integrity: t.getIntegrityForCacheKey(e) };
          }
        }
      }, t.strategy);
    }
  }
  (t.NavigationRoute = class extends i {
    constructor(t, { allowlist: e = [/./], denylist: s = [] } = {}) {
      super(t => this.W(t), t), (this.j = e), (this.M = s);
    }
    W({ url: t, request: e }) {
      if (e && 'navigate' !== e.mode) return !1;
      const s = t.pathname + t.search;
      for (const t of this.M) if (t.test(s)) return !1;
      return !!this.j.some(t => t.test(s));
    }
  }),
    (t.cleanupOutdatedCaches = function () {
      self.addEventListener('activate', t => {
        const e = f();
        t.waitUntil(
          (async (t, e = '-precache-') => {
            const s = (await self.caches.keys()).filter(
              s =>
                s.includes(e) && s.includes(self.registration.scope) && s !== t
            );
            return await Promise.all(s.map(t => self.caches.delete(t))), s;
          })(e).then(t => {})
        );
      });
    }),
    (t.createHandlerBoundToURL = function (t) {
      return N().createHandlerBoundToURL(t);
    }),
    (t.precacheAndRoute = function (t, e) {
      !(function (t) {
        N().precache(t);
      })(t),
        (function (t) {
          const e = N();
          h(new k(e, t));
        })(e);
    }),
    (t.registerRoute = h);
});