feat(navbar): add nip07 login

- add login function to call nip07 plugin
- add logged_in_user store

src/lib/components/Navbar.svelte

@@ -1,7 +1,15 @@
 <script lang="ts">
+  import {
+    checkForNip07Plugin,
+    logged_in_user,
+    login,
+    nip07_plugin,
+  } from "$lib/stores/users";
+  import { onMount } from "svelte";
   import Container from "./Container.svelte";
+  import UserHeader from "./users/UserHeader.svelte";
 
-  export let nip07plugin: boolean = false;
+  onMount(checkForNip07Plugin);
 </script>
 
 <div class="bg-base-400">
@@ -16,10 +24,19 @@
         </h4>
       </div>
       <div class="navbar-end gap-4">
-        {#if !nip07plugin}
-          <div class="btn normal-case btn-sm btn-ghost">Sign up</div>
+        {#if $logged_in_user}
+          <UserHeader user={$logged_in_user} />
+        {:else if $nip07_plugin === undefined}
+          <div class="h-8 skeleton w-20"></div>
+        {:else if $nip07_plugin}
+          <button
+            on:click={() => {
+              login();
+            }}
+            class="btn normal-case btn-sm btn-ghost">Login</button
+          >
         {:else}
-          <button class="btn normal-case btn-sm btn-ghost">Login</button>
+          <div class="btn normal-case btn-sm btn-ghost">Sign up</div>
         {/if}
       </div>
     </div>

src/lib/stores/users.ts

@@ -1,6 +1,6 @@
-import type { User } from "$lib/components/users/type";
-import { NDKUser } from "@nostr-dev-kit/ndk";
-import { writable, type Writable } from "svelte/store"
+import { defaults as user_defaults, type User } from "$lib/components/users/type";
+import { NDKNip07Signer, NDKRelayList } from "@nostr-dev-kit/ndk";
+import { get, writable, type Unsubscriber, type Writable } from "svelte/store"
 import { ndk } from "./ndk";
 
 export let users: { [hexpubkey: string]: Writable<User>; } = {};
@@ -34,3 +34,58 @@ export let ensureUser = (hexpubkey: string): Writable<User> => {
     }
     return users[hexpubkey];
 }
+
+// nip07_plugin is set in Navbar component
+export let nip07_plugin: Writable<undefined | boolean> = writable(undefined);
+
+export let checkForNip07Plugin = () => {
+    if (window.nostr) {
+        nip07_plugin.set(true);
+    } else {
+        let timerId: NodeJS.Timeout;
+        const intervalId = setInterval(() => {
+            if (window.nostr) {
+                clearTimeout(timerId);
+                clearInterval(intervalId);
+                nip07_plugin.set(true);
+            }
+        }, 100);
+        timerId = setTimeout(() => {
+            clearInterval(intervalId);
+            nip07_plugin.set(false);
+        }, 5000);
+    }
+
+};
+
+let signer = new NDKNip07Signer(2000);
+
+export let logged_in_user: Writable<undefined | User> = writable(undefined);
+
+export let login = async (): Promise<void> => {
+    return new Promise(async (res, rej) => {
+        let user = get(logged_in_user);
+        if (user) return res();
+        if (get(nip07_plugin)) {
+            try {
+                let ndk_user = await signer.blockUntilReady();
+                logged_in_user.set({
+                    ...user_defaults,
+                    hexpubkey: ndk_user.pubkey,
+                });
+                ndk.signer = signer;
+                ensureUser(ndk_user.pubkey).subscribe(user => {
+                    logged_in_user.set({ ...user });
+                });
+                return res();
+            }
+            catch (e) {
+                alert(e);
+                rej();
+            }
+        }
+        else {
+            rej();
+        }
+    });
+};