add QR scanner for adding a contact

src/views/ContactQRScanShowView.vue

@@ -3,7 +3,7 @@
   <!-- CONTENT -->
   <section id="Content" class="p-6 pb-24">
     <!-- Heading -->
-    <h1 id="ViewHeading" class="text-4xl text-center font-light pt-4 mb-8">
+    <h1 id="ViewHeading" class="text-4xl text-center font-light pt-4">
       Your Contact Info
     </h1>
 
@@ -17,12 +17,17 @@
       :dotsOptions="{ type: 'square' }"
       class="flex justify-center"
     />
+
+    <h1 class="text-4xl text-center font-light pt-4">Scan Contact Info</h1>
+    <qrcode-stream @detect="onScanDetect" @error="onScanError" />
   </section>
 </template>
 
 <script lang="ts">
 import QRCodeVue3 from "qr-code-generator-vue3";
 import { Component, Vue } from "vue-facing-decorator";
+import { QrcodeStream } from "vue-qrcode-reader";
+
 import { accountsDB, db } from "@/db/index";
 import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
 import * as R from "ramda";
@@ -30,6 +35,10 @@ import { SimpleSigner } from "@/libs/crypto";
 import * as didJwt from "did-jwt";
 import QuickNav from "@/components/QuickNav.vue";
 import { Account } from "@/db/tables/accounts";
+import {
+  CONTACT_URL_PREFIX,
+  ENDORSER_JWT_URL_LOCATION,
+} from "@/libs/endorserServer";
 
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const Buffer = require("buffer/").Buffer;
@@ -43,6 +52,7 @@ interface Notification {
 
 @Component({
   components: {
+    QrcodeStream,
     QRCodeVue3,
     QuickNav,
   },
@@ -112,9 +122,47 @@ export default class ContactQRScanShow extends Vue {
         issuer: identity.did,
         signer: signer,
       });
-      const viewPrefix = "https://endorser.ch/contact?jwt=";
+      const viewPrefix = CONTACT_URL_PREFIX + ENDORSER_JWT_URL_LOCATION;
       this.qrValue = viewPrefix + vcJwt;
     }
   }
+
+  /**
+   *
+   * @param content is the result of a QR scan, an array with one item with a rawValue property
+   */
+  // Unfortunately, there are not typescript definitions for the qrcode-stream component yet.
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  onScanDetect(content: any) {
+    if (content[0]?.rawValue) {
+      console.log("onDetect", content[0].rawValue);
+      localStorage.setItem("contactEndorserUrl", content[0].rawValue);
+      this.$router.push({ name: "contacts" });
+    } else {
+      this.$notify(
+        {
+          group: "alert",
+          type: "warning",
+          title: "Invalid Contact QR Code",
+          text: "No QR code detected with contact information.",
+        },
+        -1,
+      );
+    }
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  onScanError(error: any) {
+    console.log("Scan was invalid:", error);
+    this.$notify(
+      {
+        group: "alert",
+        type: "warning",
+        title: "Invalid Scan",
+        text: "The scan was invalid.",
+      },
+      -1,
+    );
+  }
 }
 </script>

src/views/ContactsView.vue

@@ -20,6 +20,11 @@
 
     <!-- New Contact -->
     <div class="mb-4 flex">
+      <span class="self-center bg-slate-500 text-white px-1.5 py-1 rounded-md">
+        <router-link :to="{ name: 'contact-qr' }">
+          <fa icon="qrcode" class="fa-fw" />
+        </router-link>
+      </span>
       <input
         type="text"
         placeholder="DID, Name, Public Key"
@@ -211,11 +216,17 @@
 import { AxiosError } from "axios";
 import * as didJwt from "did-jwt";
 import * as R from "ramda";
+
+import { NotificationIface } from "@/constants/app";
 import { IIdentifier } from "@veramo/core";
 import { accountsDB, db } from "@/db/index";
 import { Contact } from "@/db/tables/contacts";
 import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
-import { accessToken, SimpleSigner } from "@/libs/crypto";
+import {
+  accessToken,
+  getContactPayloadFromJwtUrl,
+  SimpleSigner,
+} from "@/libs/crypto";
 import {
   GiveServerRecord,
   GiveVerifiableCredential,
@@ -229,22 +240,16 @@ import EntityIcon from "@/components/EntityIcon.vue";
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const Buffer = require("buffer/").Buffer;
 
-interface Notification {
-  group: string;
-  type: string;
-  title: string;
-  text: string;
-}
-
 @Component({
   components: { QuickNav, EntityIcon },
 })
 export default class ContactsView extends Vue {
-  $notify!: (notification: Notification, timeout?: number) => void;
+  $notify!: (notification: NotificationIface, timeout?: number) => void;
 
   activeDid = "";
   apiServer = "";
   contacts: Array<Contact> = [];
+  contactEndorserUrl = localStorage.getItem("contactEndorserUrl") || "";
   contactInput = "";
   // { "did:...": concatenated-descriptions } entry for each contact
   givenByMeDescriptions: Record<string, string> = {};
@@ -279,6 +284,12 @@ export default class ContactsView extends Vue {
       (a: Contact, b) => (a.name || "").localeCompare(b.name || ""),
       allContacts,
     );
+
+    if (this.contactEndorserUrl) {
+      await this.newContactFromScan(this.contactEndorserUrl);
+      localStorage.removeItem("contactEndorserUrl");
+      this.contactEndorserUrl = "";
+    }
   }
 
   public async getIdentity(activeDid: string) {
@@ -414,6 +425,18 @@ export default class ContactsView extends Vue {
   }
 
   async onClickNewContact(): Promise<void> {
+    if (!this.contactInput) {
+      this.$notify(
+        {
+          group: "alert",
+          type: "warning",
+          title: "No Contact",
+          text: "There was no contact info to add.",
+        },
+        -1,
+      );
+      return;
+    }
     let did = this.contactInput;
     let name, publicKeyBase64;
     const commaPos1 = this.contactInput.indexOf(",");
@@ -432,12 +455,74 @@ export default class ContactsView extends Vue {
       publicKeyBase64 = Buffer.from(publicKeyBase64, "hex").toString("base64");
     }
     const newContact = { did, name, publicKeyBase64 };
-    await db.contacts.add(newContact);
-    const allContacts = this.contacts.concat([newContact]);
-    this.contacts = R.sort(
-      (a: Contact, b) => (a.name || "").localeCompare(b.name || ""),
-      allContacts,
-    );
+    return this.addContact(newContact);
+  }
+
+  async newContactFromScan(url: string): Promise<void> {
+    const payload = getContactPayloadFromJwtUrl(url);
+    if (!payload) {
+      this.$notify(
+        {
+          group: "alert",
+          type: "danger",
+          title: "No Contact Info",
+          text: "The contact info could not be parsed.",
+        },
+        -1,
+      );
+      return;
+    } else {
+      return this.addContact({
+        did: payload.iss,
+        name: payload.own.name,
+        publicKeyBase64: payload.own.publicEncKey,
+      } as Contact);
+    }
+  }
+
+  async addContact(newContact: Contact) {
+    if (!newContact.did) {
+      this.$notify(
+        {
+          group: "alert",
+          type: "danger",
+          title: "Incomplete Contact",
+          text: "Cannot add a contact without a DID.",
+        },
+        -1,
+      );
+      return;
+    }
+    return db.contacts
+      .add(newContact)
+      .then(() => {
+        const allContacts = this.contacts.concat([newContact]);
+        this.contacts = R.sort(
+          (a: Contact, b) => (a.name || "").localeCompare(b.name || ""),
+          allContacts,
+        );
+        this.$notify(
+          {
+            group: "alert",
+            type: "success",
+            title: "Contact added",
+            text: newContact.name + " was added.",
+          },
+          -1,
+        );
+      })
+      .catch((err) => {
+        console.error("Error when adding contact to storage:", err);
+        this.$notify(
+          {
+            group: "alert",
+            type: "danger",
+            title: "Contact Not Added",
+            text: "An error prevented importing.",
+          },
+          -1,
+        );
+      });
   }
 
   async deleteContact(contact: Contact) {