add following service

README.md

@@ -12,7 +12,7 @@
 - [x] NIP-05 support
 - [x] Broadcast events
 - [x] User tipping
-- [ ] Manage followers ( Contact List )
+- [x] Manage followers ( Contact List )
 - [ ] Profile management
 - [ ] Relay management
 - [ ] Image upload
@@ -24,7 +24,7 @@
 
 ## Supported NIPs
 
-- [ ] [NIP-02](https://github.com/nostr-protocol/nips/blob/master/02.md): Contact List and Petnames
+- [x] [NIP-02](https://github.com/nostr-protocol/nips/blob/master/02.md): Contact List and Petnames
 - [ ] [NIP-03](https://github.com/nostr-protocol/nips/blob/master/03.md): OpenTimestamps Attestations for Events
 - [ ] [NIP-04](https://github.com/nostr-protocol/nips/blob/master/04.md): Encrypted Direct Message
 - [x] [NIP-05](https://github.com/nostr-protocol/nips/blob/master/05.md): Mapping Nostr keys to DNS-based internet identifiers
@@ -53,7 +53,6 @@
 
 - add `client` tag to published events
 - add button for creating lightning invoice via WebLN
-- setup deploy to s3
 - make app a valid web share target https://developer.chrome.com/articles/web-share-target/
   - make app handle image files
 - block notes based on content

src/components/connected-relays.tsx

@@ -9,7 +9,6 @@ import {
   ModalBody,
   ModalCloseButton,
   Button,
-  Spacer,
 } from "@chakra-ui/react";
 import { Relay } from "../services/relays";
 import relayPool from "../services/relays/relay-pool";
@@ -49,7 +48,7 @@ export const ConnectedRelays = () => {
           <ModalCloseButton />
           <ModalBody>
             {relays.map((relay) => (
-              <Text>
+              <Text key={relay.url}>
                 <RelayStatus url={relay.url} /> {relay.url}
               </Text>
             ))}

src/components/following-list.tsx

@@ -3,8 +3,8 @@ import { Link } from "react-router-dom";
 import { Bech32Prefix, normalizeToBech32 } from "../helpers/nip-19";
 import { getUserDisplayName } from "../helpers/user-metadata";
 import useSubject from "../hooks/use-subject";
-import { useUserContacts } from "../hooks/use-user-contacts";
 import { useUserMetadata } from "../hooks/use-user-metadata";
+import followingService from "../services/following";
 import identity from "../services/identity";
 import { UserAvatar } from "./user-avatar";
 
@@ -29,15 +29,15 @@ const FollowingListItem = ({ pubkey }: { pubkey: string }) => {
 
 export const FollowingList = () => {
   const pubkey = useSubject(identity.pubkey);
-  const contacts = useUserContacts(pubkey);
+  const following = useSubject(followingService.following);
 
-  if (!contacts) return <SkeletonText />;
+  if (!following) return <SkeletonText />;
 
   return (
     <Box overflow="auto" pr="2" pb="4" pt="2">
       <Flex direction="column" gap="2">
-        {contacts.contacts.map((contact) => (
-          <FollowingListItem key={contact} pubkey={contact} />
+        {following.map((pTag) => (
+          <FollowingListItem key={pTag[1]} pubkey={pTag[1]} />
         ))}
       </Flex>
     </Box>

src/components/note/note-contents.tsx

@@ -167,7 +167,7 @@ const embeds: EmbedType[] = [
     regexp: /(https?:\/\/)([\da-z\.-]+\.[a-z\.]{2,6})([\/\w\.-]+\.(svg|gif|png|jpg|jpeg|webp|avif))[^\s]*/im,
     render: (match, event, trusted) => {
       const ImageComponent = trusted || !settings.blurImages.value ? Image : BlurredImage;
-      return <ImageComponent src={match[0]} width="100%" maxWidth="30rem" minHeight="20rem" />;
+      return <ImageComponent src={match[0]} width="100%" maxWidth="30rem" />;
     },
     name: "Image",
     isMedia: true,
@@ -175,11 +175,7 @@ const embeds: EmbedType[] = [
   // Video
   {
     regexp: /(https?:\/\/)([\da-z\.-]+\.[a-z\.]{2,6})([\/\w\.-]+\.(mp4|mkv|webm|mov))[^\s]*/im,
-    render: (match) => (
-      <AspectRatio ratio={16 / 9} maxWidth="30rem">
-        <video src={match[0]} controls />
-      </AspectRatio>
-    ),
+    render: (match) => <video src={match[0]} controls style={{ maxWidth: "30rem" }} />,
     name: "Video",
     isMedia: true,
   },

src/components/page.tsx

@@ -17,10 +17,21 @@ import { UserAvatarLink } from "./user-avatar-link";
 
 const MobileProfileHeader = () => {
   const pubkey = useSubject(identity.pubkey);
+  const readonly = useReadonlyMode();
 
   return (
-    <Flex justifyContent="space-between" padding="2">
+    <Flex justifyContent="space-between" padding="2" alignItems="center">
       <UserAvatarLink pubkey={pubkey} size="sm" />
+      {readonly && (
+        <Button
+          colorScheme="red"
+          textAlign="center"
+          variant="link"
+          onClick={() => confirm("Exit readonly mode?") && identity.logout()}
+        >
+          Readonly Mode
+        </Button>
+      )}
       <Flex gap="2">
         <ConnectedRelays />
         <IconButton
@@ -86,7 +97,7 @@ const DesktopSideNav = () => {
         Logout
       </Button>
       {readonly && (
-        <Text color="yellow.500" textAlign="center">
+        <Text color="red.200" textAlign="center">
           Readonly Mode
         </Text>
       )}

src/components/user-follow-button.tsx

@@ -0,0 +1,31 @@
+import { Button, ButtonProps } from "@chakra-ui/react";
+import { useReadonlyMode } from "../hooks/use-readonly-mode";
+import useSubject from "../hooks/use-subject";
+import followingService from "../services/following";
+
+export const UserFollowButton = ({
+  pubkey,
+  ...props
+}: { pubkey: string } & Omit<ButtonProps, "onClick" | "isLoading" | "isDisabled">) => {
+  const readonly = useReadonlyMode();
+  const following = useSubject(followingService.following);
+  const savingDraft = useSubject(followingService.savingDraft);
+
+  const isFollowing = following.some((t) => t[1] === pubkey);
+
+  const toggleFollow = async () => {
+    if (isFollowing) {
+      followingService.removeContact(pubkey);
+    } else {
+      followingService.addContact(pubkey);
+    }
+
+    await followingService.savePendingDraft();
+  };
+
+  return (
+    <Button colorScheme="brand" {...props} isLoading={savingDraft} onClick={toggleFollow} isDisabled={readonly}>
+      {isFollowing ? "Unfollow" : "Follow"}
+    </Button>
+  );
+};

src/helpers/user-metadata.ts

@@ -10,3 +10,10 @@ export function getUserDisplayName(metadata: Kind0ParsedContent | undefined, pub
   }
   return truncatedId(normalizeToBech32(pubkey, Bech32Prefix.Pubkey) ?? pubkey);
 }
+
+export function fixWebsiteUrl(website: string) {
+  if (website.match(/^http?s:\/\//)) {
+    return website;
+  }
+  return "https://" + website;
+}

src/services/following.ts

@@ -0,0 +1,106 @@
+import moment from "moment";
+import { BehaviorSubject, lastValueFrom } from "rxjs";
+import { nostrPostAction } from "../classes/nostr-post-action";
+import { DraftNostrEvent, PTag } from "../types/nostr-event";
+import identity from "./identity";
+import settings from "./settings";
+import userContactsService, { UserContacts } from "./user-contacts";
+
+export type RelayDirectory = Record<string, { read: boolean; write: boolean }>;
+
+const following = new BehaviorSubject<PTag[]>([]);
+// const relays = new BehaviorSubject<RelayDirectory>({});
+const pendingDraft = new BehaviorSubject<DraftNostrEvent | null>(null);
+const savingDraft = new BehaviorSubject(false);
+
+let sub;
+identity.pubkey.subscribe((pubkey) => {
+  sub = userContactsService.requestContacts(pubkey, settings.relays.value, true).subscribe((userContacts) => {
+    if (!userContacts) return;
+
+    following.next(
+      userContacts.contacts.map((key) => {
+        const relay = userContacts.contactRelay[key];
+        if (relay) return ["p", key, relay];
+        else return ["p", key];
+      })
+    );
+
+    // reset the pending list since we just got a new contacts list
+    pendingDraft.next(null);
+  });
+});
+
+function isFollowing(pubkey: string) {
+  return following.value.some((t) => t[1] === pubkey);
+}
+
+function getDraftEvent(): DraftNostrEvent {
+  return {
+    kind: 3,
+    tags: following.value,
+    // according to NIP-02 kind 3 events (contact list) can have any content and it should be ignored
+    // https://github.com/nostr-protocol/nips/blob/master/02.md
+    // some other clients are using the content to store relays.
+    content: "",
+    created_at: moment().unix(),
+  };
+}
+
+async function savePendingDraft() {
+  const draft = pendingDraft.value;
+  if (!draft) return;
+
+  if (window.nostr) {
+    savingDraft.next(true);
+    const event = await window.nostr.signEvent(draft);
+
+    const results = nostrPostAction(settings.relays.value, event);
+    await lastValueFrom(results);
+
+    savingDraft.next(false);
+
+    // pass new event to contact list service
+    userContactsService.receiveEvent(event);
+  }
+}
+
+function addContact(pubkey: string, relay?: string) {
+  const newTag: PTag = relay ? ["p", pubkey, relay] : ["p", pubkey];
+  if (isFollowing(pubkey)) {
+    following.next(
+      following.value.map((t) => {
+        if (t[1] === pubkey) {
+          return newTag;
+        }
+        return t;
+      })
+    );
+  } else {
+    following.next([...following.value, newTag]);
+  }
+
+  pendingDraft.next(getDraftEvent());
+}
+function removeContact(pubkey: string) {
+  if (isFollowing(pubkey)) {
+    following.next(following.value.filter((t) => t[1] !== pubkey));
+    pendingDraft.next(getDraftEvent());
+  }
+}
+
+const followingService = {
+  following: following,
+  isFollowing,
+  savingDraft,
+  savePendingDraft,
+  addContact,
+  removeContact,
+};
+
+if (import.meta.env.DEV) {
+  // @ts-ignore
+  window.followingService = followingService;
+}
+
+export default followingService;

src/views/user/index.tsx

@@ -16,7 +16,7 @@ import {
 import { Outlet, useLoaderData, useMatches, useNavigate } from "react-router-dom";
 import { useUserMetadata } from "../../hooks/use-user-metadata";
 import { UserAvatar } from "../../components/user-avatar";
-import { getUserDisplayName } from "../../helpers/user-metadata";
+import { fixWebsiteUrl, getUserDisplayName } from "../../helpers/user-metadata";
 import { useIsMobile } from "../../hooks/use-is-mobile";
 import { UserProfileMenu } from "./components/user-profile-menu";
 import { LinkIcon } from "@chakra-ui/icons";
@@ -27,6 +27,7 @@ import { Bech32Prefix, normalizeToBech32 } from "../../helpers/nip-19";
 import { KeyIcon, SettingsIcon } from "../../components/icons";
 import { CopyIconButton } from "../../components/copy-icon-button";
 import identity from "../../services/identity";
+import { UserFollowButton } from "../../components/user-follow-button";
 
 const tabs = [
   { label: "Notes", path: "notes" },
@@ -72,7 +73,7 @@ const UserView = () => {
         {metadata?.website && (
           <Text>
             <LinkIcon />{" "}
-            <Link href={metadata.website} target="_blank" color="blue.500">
+            <Link href={fixWebsiteUrl(metadata.website)} target="_blank" color="blue.500">
               {metadata.website}
             </Link>
           </Text>
@@ -91,11 +92,7 @@ const UserView = () => {
               onClick={() => navigate("/settings")}
             />
           )}
-          {!isSelf && (
-            <Button colorScheme="brand" size="sm">
-              Follow
-            </Button>
-          )}
+          {!isSelf && <UserFollowButton pubkey={pubkey} size="sm" />}
         </Flex>
       </Flex>
     </Flex>