Merge pull request #69 from NatLibFi/ekir-magazines

EKIR-754 Handle opening of magazines

Author: natlibfi-burger

src/auth/ekirjastoFetch.ts

@@ -8,13 +8,18 @@ export async function fetchEAuthToken(
   url: string | undefined,
   token: string | undefined
 ) {
-  if (!url) {
+  if (!url || !token) {
     throw new ApplicationError({
       title: "Incomplete Authentication Info",
       detail: "No URL or Token was provided for authentication"
     });
   }
 
+  //If in some case, the bearer text is present, remove it so there is no repetition in the request
+  if (token?.startsWith("Bearer ")) {
+    token = token.replace("Bearer ", "");
+  }
+
   const response = await fetchWithHeaders(url, `Bearer ${token}`, {}, "POST");
   const json = await response.json();
 
@@ -24,3 +29,24 @@ export async function fetchEAuthToken(
 
   return json;
 }
+
+export async function fetchEkirjastoToken(
+  url: string | undefined,
+  token: string | undefined
+) {
+  if (!url || !token) {
+    throw new ApplicationError({
+      title: "Incomplete Authentication Info",
+      detail: "No URL or Token was provided for authentication"
+    });
+  }
+
+  const response = await fetchWithHeaders(url, token, {}, "GET");
+  const json = await response.json();
+
+  if (!response.ok) {
+    throw new ServerError(url, response.status, json);
+  }
+
+  return json;
+}

src/auth/useCredentials.ts

@@ -113,6 +113,10 @@ function getCredentialsCookie(
   if (librarySlug === "ekirjasto") {
     // Get access token, for ekirjasto login credentials
     const accessToken = Cookie.get(cookieNameEkirjasto());
+    if (!accessToken) {
+      console.log("No access token");
+      return undefined;
+    }
     // Create ekirjasto authentication credentials
     const authCredentials: AuthCredentials = {
       token: `Bearer ${accessToken}`,

src/components/context/UserContext.tsx

@@ -8,6 +8,7 @@ import * as React from "react";
 import useSWR from "swr";
 import { BasicTokenAuthType, EkirjastoAuthType } from "types/opds1";
 import { addHours, isBefore } from "date-fns";
+import { fetchEkirjastoToken } from "auth/ekirjastoFetch";
 
 type Status = "authenticated" | "loading" | "unauthenticated";
 export type UserState = {
@@ -22,6 +23,10 @@ export type UserState = {
     authenticationUrl: string | undefined
   ) => void;
   signOut: () => void;
+  getEkirjastoToken: (
+    token: string,
+    fetchUrl: string | undefined
+  ) => Promise<string>;
   setBook: (book: AnyBook, id?: string) => void;
   error: any;
   token: string | undefined;
@@ -117,6 +122,17 @@ export const UserProvider = ({ children }: UserProviderProps) => {
     }
   );
 
+  async function getEkirjastoToken(
+    token: string,
+    fetchUrl: string | undefined
+  ): Promise<string> {
+    const { token: ekirjastoToken } = await fetchEkirjastoToken(
+      fetchUrl,
+      token
+    );
+    return ekirjastoToken;
+  }
+
   function signIn(
     token: string | Token,
     method: AppAuthMethod,
@@ -160,6 +176,7 @@ export const UserProvider = ({ children }: UserProviderProps) => {
     refetchLoans: mutate,
     signIn,
     signOut,
+    getEkirjastoToken,
     setBook,
     error,
     token: stringifyToken(credentials),

src/config/magazines.ts

@@ -73,5 +73,5 @@ export const MAGAZINE_CONFIG = {
 
   // Default iframe sandbox permissions
   IFRAME_SANDBOX:
-    "allow-scripts allow-same-origin allow-forms allow-popups allow-popups-to-escape-sandbox"
+    "allow-scripts allow-same-origin allow-forms allow-popups allow-popups-to-escape-sandbox allow-top-navigation-by-user-activation"
 } as const;

src/pages/[library]/magazines/index.tsx

@@ -17,12 +17,32 @@ import {
 } from "config/magazines";
 import Head from "next/head";
 import BreadcrumbBar from "components/BreadcrumbBar";
+import { EKIRJASTO_AUTH_TYPE } from "utils/constants";
 
 const MagazinesFixedContent: React.FC = () => {
   const iframeRef = React.useRef<HTMLIFrameElement | null>(null);
-  const { token } = useUser();
+  const { token, getEkirjastoToken } = useUser();
   const { initLogin } = useLogin();
-  const { slug } = useLibraryContext();
+  const { slug, authMethods } = useLibraryContext();
+  const ekirMethod = authMethods.find(
+    method => method.type === EKIRJASTO_AUTH_TYPE
+  );
+  let ekirjastoToken: string | undefined;
+  if (ekirMethod && token) {
+    try {
+      //Get the ekirjastoToken
+      const ekirjastoTokenUrl = ekirMethod.links.find(
+        link => link.rel === "ekirjasto_token"
+      )?.href;
+      ekirjastoToken = getEkirjastoToken(token, ekirjastoTokenUrl);
+    } catch (error) {
+      //Can not start the reader so should show not logged in or something
+    }
+  }
+  if (!token) {
+    console.log("There is no token so should be logged out");
+    ekirjastoToken = undefined;
+  }
 
   const storageKey = React.useMemo(
     () => `${MAGAZINE_CONFIG.STORAGE_KEY_PREFIX}${slug ?? "default"}`,
@@ -45,12 +65,17 @@ const MagazinesFixedContent: React.FC = () => {
   const handleMessage = React.useCallback(
     (e: MessageEvent) => {
       const allowedOrigin = getMagazineAllowedOrigin();
+
+      if (!token) {
+        console.log("No token!");
+      }
+
       if (e.origin !== allowedOrigin || typeof e.data !== "string") return;
 
       if (e.data === "ewl:unauthorized") {
-        if (token) {
+        if (ekirjastoToken) {
           iframeRef.current?.contentWindow?.postMessage(
-            `ewl:login:${token}`,
+            `ewl:login:${ekirjastoToken}`,
             allowedOrigin
           );
         } else {
@@ -72,7 +97,7 @@ const MagazinesFixedContent: React.FC = () => {
         });
       }
     },
-    [initLogin, token, storageKey]
+    [initLogin, ekirjastoToken, token, storageKey]
   );
 
   React.useEffect(() => {