add a way to copy a list of contacts with a shorter URL

src/views/ContactImportView.vue

@@ -197,16 +197,30 @@
           Import Contacts
         </button>
       </ul>
-      <p v-else-if="contactsImporting.length > 0">
-        All those contacts are already in your list with the same information.
-        <button
-          v-if="applyLabelsToExisting"
-          class="bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-sm text-white mt-2 px-2 py-1.5 rounded"
-          @click="importContacts"
-        >
-          Apply Labels to Existing Contacts
-        </button>
-      </p>
+      <div v-else-if="contactsImporting.length > 0">
+        <p>
+          All those contacts are already in your list with the same information.
+        </p>
+        <div class="mt-3 flex flex-col items-center gap-2">
+          <button
+            data-testId="copyUnsignedImportLinkButton"
+            class="bg-gradient-to-b from-slate-400 to-slate-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-sm text-white px-2 py-1.5 rounded w-fit"
+            @click="copyUnsignedImportLink"
+          >
+            Copy Unsigned Link for These Contacts
+          </button>
+
+          <button
+            class="bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-sm text-white px-2 py-1.5 rounded w-fit"
+            :class="{
+              'opacity-50 cursor-not-allowed': !canApplyLabelsToExisting,
+            }"
+            @click="handleApplyLabelsToExistingClick"
+          >
+            Apply Labels to Existing Contacts
+          </button>
+        </div>
+      </div>
       <div v-else>
         There are no contacts in that import. If some were sent, try again to
         get the full text and paste it. (Note that iOS cuts off data in text
@@ -291,7 +305,8 @@ import { RouteLocationNormalizedLoaded, Router } from "vue-router";
 import QuickNav from "../components/QuickNav.vue";
 import EntityIcon from "../components/EntityIcon.vue";
 import OfferDialog from "../components/OfferDialog.vue";
-import { AppString, NotificationIface } from "../constants/app";
+import { APP_SERVER, AppString, NotificationIface } from "../constants/app";
+import { copyToClipboard } from "../services/ClipboardService";
 import {
   Contact,
   ContactWithLabels,
@@ -647,6 +662,52 @@ export default class ContactImportView extends Vue {
     this.checkingImports = false;
   }
 
+  private buildUnsignedImportLink(): string {
+    const contactsForLink: Array<Contact> = this.contactsImporting.map((c) => {
+      const contact: Contact = {
+        did: c.did,
+      };
+      if (c.name) {
+        contact.name = c.name;
+      }
+      if (c.nextPubKeyHashB64) {
+        contact.nextPubKeyHashB64 = c.nextPubKeyHashB64;
+      }
+      if (c.profileImageUrl) {
+        contact.profileImageUrl = c.profileImageUrl;
+      }
+      if (c.publicKeyBase64) {
+        contact.publicKeyBase64 = c.publicKeyBase64;
+      }
+      if (typeof c.registered === "boolean") {
+        contact.registered = c.registered;
+      }
+      return contact;
+    });
+    const contactsParam = encodeURIComponent(JSON.stringify(contactsForLink));
+    return `${APP_SERVER}/deep-link/contact-import?contacts=${contactsParam}`;
+  }
+
+  async copyUnsignedImportLink() {
+    if (this.contactsImporting.length === 0) {
+      this.notify.error(
+        "No contacts are loaded to build a link.",
+        TIMEOUTS.SHORT,
+      );
+      return;
+    }
+    try {
+      const link = this.buildUnsignedImportLink();
+      await copyToClipboard(link);
+      this.notify.copied("unsigned contact import link", TIMEOUTS.STANDARD);
+    } catch (error) {
+      const fullError =
+        "Error copying unsigned import link: " + errorStringForLog(error);
+      this.$logAndConsole(fullError, true);
+      this.notify.error("Failed to copy link to clipboard.", TIMEOUTS.STANDARD);
+    }
+  }
+
   /**
    * Adds a new label to the selected labels list
    */
@@ -803,5 +864,20 @@ export default class ContactImportView extends Vue {
     );
     this.$router.push({ name: "contacts" });
   }
+
+  private get canApplyLabelsToExisting(): boolean {
+    return this.applyLabelsToExisting && this.selectedLabels.length > 0;
+  }
+
+  private async handleApplyLabelsToExistingClick() {
+    if (!this.canApplyLabelsToExisting) {
+      this.notify.warning(
+        `You must choose some labels and check the "Apply" checkbox to use this.`,
+        TIMEOUTS.LONG,
+      );
+      return;
+    }
+    await this.importContacts();
+  }
 }
 </script>