Cancellation implemented

lib/rss.ts

@@ -1,5 +1,5 @@
 import { declaration, serialize, Tag, tag } from "serialize-xml";
-import { getHostName } from "./utils.ts";
+import { getHostUrl } from "./utils.ts";
 import { Episode, Series } from "./storage.ts";
 
 function assembleFeed(series: Series): string {
@@ -71,7 +71,7 @@ function assembleEpisode(episode: Episode, seriesId: Series["id"]): Tag {
     tag("podcast:chapters", "", [
       [
         "url",
-        `${getHostName()}/api/feeds/${seriesId}/${episode.id}/chapters`,
+        `${getHostUrl()}/api/feeds/${seriesId}/${episode.id}/chapters`,
       ],
       ["type", "application/json+chapters"],
     ]),

lib/storage.ts

@@ -19,10 +19,12 @@ export type Series = {
 };
 
 export type VippsAgreement = {
+  // the user identifier / email
   id: string;
+  // the agreement id from Vipps
   agreementId: string;
-  userEmail: string;
   createdAt: Date;
+  validAt: Date | null;
   revokedAt: Date | null;
 };
 

lib/utils.ts

@@ -1,18 +1,16 @@
 import { STATUS_CODE } from "$fresh/server.ts";
 
-export function getHostName() {
+export function getHostUrl() {
   const deploymentId = Deno.env.get("DENO_DEPLOYMENT_ID");
+  const tunnelUrl = Deno.env.get("TUNNEL_URL");
   if (deploymentId) {
     return `https://nrss-${deploymentId}.deno.dev`;
+  } else if (tunnelUrl) {
+    console.debug(`Using tunnel URL: ${tunnelUrl}`);
+    return tunnelUrl;
   } else {
-    const proxyUrl = Deno.env.get("PROXY_URL");
-    if (proxyUrl) {
-      console.debug(`Using proxy URL ${proxyUrl}`);
-      return proxyUrl;
-    } else {
-      console.debug(`Assuming localhost`);
-      return "http://localhost:8000";
-    }
+    console.debug(`Assuming localhost`);
+    return "http://localhost:8000";
   }
 }
 

lib/vipps/vipps.ts

@@ -1,5 +1,5 @@
 import "jsr:@std/dotenv/load";
-import { getHostName } from "../utils.ts";
+import { getHostUrl } from "../utils.ts";
 import { STATUS_CODE } from "$fresh/server.ts";
 
 const config = {
@@ -47,7 +47,7 @@ export const createAgreement = async function (email: string) {
     method: "POST",
     headers: {
       authorization: `Bearer ${token}`,
-      "Idempotency-Key": email,
+      "Idempotency-Key": `${email}-${Date.now()}`,
       ...standardVippsHeaders,
     },
     body: JSON.stringify({
@@ -60,8 +60,9 @@ export const createAgreement = async function (email: string) {
         "currency": "NOK",
         "type": "VARIABLE",
       },
-      "merchantRedirectUrl": `${getHostName()}/donations-success`,
-      "merchantAgreementUrl": `${getHostName()}/donations`,
+      // email is used to identify the user in the success page
+      "merchantRedirectUrl": `${getHostUrl()}/donations-success?email=${email}`,
+      "merchantAgreementUrl": `${getHostUrl()}`,
       "productName": "Månedlig støtte til NRSS",
     }),
   });
@@ -70,6 +71,7 @@ export const createAgreement = async function (email: string) {
     const body = response.json();
     return body as unknown as {
       vippsConfirmationUrl: string;
+      agreementId: string;
     };
   } else {
     const errorMessage = `Failed to create Vipps agreement ${response.status} ${await response.text()}`;
@@ -95,3 +97,26 @@ export const getAgreement = async function (agreementId: string) {
     return new Error(errorMessage);
   }
 };
+
+export const cancelAgreement = async function (agreementId: string) {
+  const token = await getAccessToken();
+  const response = await fetch(`${config.baseUrl}/recurring/v3/agreements/${agreementId}`, {
+    method: "PATCH",
+    headers: {
+      authorization: `Bearer ${token}`,
+      "Idempotency-Key": `${agreementId}-${Date.now()}`,
+      ...standardVippsHeaders,
+    },
+    body: JSON.stringify({
+      "status": "STOPPED",
+    }),
+  });
+
+  if (response.status === STATUS_CODE.NoContent) {
+    return true;
+  } else {
+    const errorMessage = `Failed to cancel Vipps agreement ${response.status} ${await response.text()}`;
+    console.error(errorMessage);
+    return new Error(errorMessage);
+  }
+};

routes/api/trigger-donation/vipps.ts

@@ -1,9 +1,10 @@
-import { getHostName, validateEmail } from "../../../lib/utils.ts";
+import { getHostUrl, validateEmail } from "../../../lib/utils.ts";
+import { storage } from "../../../lib/storage.ts";
 import { createAgreement } from "../../../lib/vipps/vipps.ts";
 
 export const handler = async function (req: Request): Promise<Response> {
   const email = new URLSearchParams(req.url.split("?")[1] || "").get("email");
-  const errorPage = `${getHostName()}/donations-error`;
+  const errorPage = `${getHostUrl()}/donations-error`;
 
   if (!email) {
     console.error("Missing email in query params", req.url);
@@ -22,5 +23,15 @@ export const handler = async function (req: Request): Promise<Response> {
     return Response.redirect(errorPage);
   }
 
+  // associate the agreement with the user here
+  // so it can be updated in the success page
+  await storage.writeVippsAgreement({
+    id: email,
+    agreementId: agreement.agreementId,
+    createdAt: new Date(),
+    validAt: null,
+    revokedAt: null,
+  });
+
   return Response.redirect(agreement.vippsConfirmationUrl);
 };

routes/donations-cancel.tsx

@@ -1,6 +1,50 @@
+import { Handlers, PageProps } from "$fresh/server.ts";
+import { Button } from "../components/Button.tsx";
 import { Input } from "../components/Input.tsx";
+import { storage } from "../lib/storage.ts";
+import * as vipps from "../lib/vipps/vipps.ts";
+import { validateEmail } from "../lib/utils.ts";
 
-export default function () {
+type Props = {
+  email: string;
+  error: string | null;
+  cancelled: boolean;
+};
+
+export const handler: Handlers<Props> = {
+  async GET(request, ctx) {
+    const url = new URL(request.url);
+    const email = url.searchParams.get("email");
+
+    if (!email) {
+      return ctx.render({ email: null, error: null, cancelled: false });
+    }
+
+    if (!validateEmail(email)) {
+      console.error("Ugyldig e-post server-side", email);
+      return ctx.render({ email: null, error: "Ugyldig e-post", cancelled: false });
+    }
+
+    const agreement = await storage.readVippsAgreement({ id: email });
+    if (!agreement) {
+      console.error("Mangler avtale for e-post", email);
+      return ctx.render({ email: null, error: `Ingen abonnement funnet for "${email}"`, cancelled: false });
+    }
+
+    const vippsResponse = await vipps.cancelAgreement(agreement.agreementId);
+    if (vippsResponse instanceof Error) {
+      return ctx.render({ email, error: "Kunne ikke kansellere Vipps-abonnement", cancelled: false });
+    }
+    await storage.writeVippsAgreement({
+      ...agreement,
+      revokedAt: new Date(),
+    });
+
+    return ctx.render({ email, error: null, cancelled: true });
+  },
+};
+
+export default function ({ data }: PageProps<Props>) {
   return (
     <div
       className={"p-4 mx-auto max-w-screen-md text-center"}
@@ -10,10 +54,36 @@ export default function () {
       >
         Avslutt støtte til NRSS
       </h1>
-      <Input
-        placeholder={"ditt mobillnummer"}
-      >
-      </Input>
+      {data.error && (
+        <p className={"text-red-500"}>
+          En feil oppsto: "{data.error}". Ta gjerne{" "}
+          <a className="text-blue-600 underline" href="mailto:olav@sundfoer.com">
+            kontakt på mail
+          </a>.
+        </p>
+      )}
+      {data.cancelled && (
+        <p>
+          Støtten er nå avsluttet. Tusen takk for at du har støttet NRSS!
+        </p>
+      )}
+      {!data.cancelled && (
+        <form>
+          <Input
+            type={"email"}
+            placeholder={"din@epost.no"}
+            required
+            name={"email"}
+            id={"email"}
+          >
+          </Input>
+          <Button
+            type={"submit"}
+          >
+            Avslutt
+          </Button>
+        </form>
+      )}
     </div>
   );
 }

routes/donations-success.tsx

@@ -1,24 +1,37 @@
-import { PageProps } from "$fresh/server.ts";
-import { getAgreement } from "../lib/vipps/vipps.ts";
+import { Handlers, PageProps } from "$fresh/server.ts";
+import { storage } from "../lib/storage.ts";
+import { validateEmail } from "../lib/utils.ts";
 
-export const handler: Handlers<Props> = {
+export const handler: Handlers = {
   async GET(request, ctx) {
-    // TODO: somehow get the agreement ID
-    // TODO: implement cancel page
-
-    const agreementId = "123";
-    const agreement = await getAgreement(agreementId);
-    if (agreement instanceof Error) {
-      console.error("Failed to get Vipps agreement", agreement);
-      return ctx.redirect("/donations-error");
+    const url = new URL(request.url);
+    const email = url.searchParams.get("email");
+    if (!email) {
+      console.error("Missing email in query params", request.url);
+      return Response.redirect("/donations-error");
     }
 
-    return ctx.render({ agreement });
+    if (!validateEmail(email)) {
+      console.error("Invalid email server side", email);
+      return Response.redirect("/donations-error");
+    }
+
+    const agreement = await storage.readVippsAgreement({ id: email });
+    if (!agreement) {
+      console.error("Missing agreement for email", email);
+      return Response.redirect("/donations-error");
+    }
+
+    const validatedAgreement = await storage.writeVippsAgreement({
+      ...agreement,
+      validAt: new Date(),
+    });
+
+    return ctx.render({ agreement: validatedAgreement });
   },
 };
 
 export default function ({ data }: PageProps<{
-  // TODO: confirm interface when you know it
   agreement: {
     status: string;
     id: string;