route: add contact list view

added new route /contacts/npub... to show contact lists of users.
each user has about text, follow/unfollow buttons.

fixed CSS and JavaScript links in index.html to support deeper
path i.e. /contacts/npub... uri's.

src/contacts.ts

@@ -13,22 +13,28 @@ const contactHistoryMap: {
   [pubkey: string]: Event[];
 } = {};
 
+const hasOwnContactList = () => {
+  return !!contactHistoryMap[config.pubkey];
+};
+
 /**
  * returns true if user is following pubkey
  */
-export const isFollowing = (id: string) => {
+export const isFollowing = (pubkey: string) => {
   const following = contactHistoryMap[config.pubkey]?.at(0);
   if (!following) {
     return false;
   }
-  return following.tags.some(([tag, value]) => tag === 'p' && value === id);
+  return following.tags.some(([tag, value]) => tag === 'p' && value === pubkey);
 };
 
 export const updateFollowBtn = (pubkey: string) => {
-  const followBtn = getViewElem('followBtn');
-  if (followBtn) {
+  const followBtn = getViewElem(`followBtn-${pubkey}`);
+  const view = getViewOptions();
+  if (followBtn && (view.type === 'contacts' || view.type === 'profile')) {
     const hasContact = isFollowing(pubkey);
-    followBtn.textContent = hasContact ? 'unfollow' : 'follow';
+    const isMe = config.pubkey === pubkey;
+    followBtn.textContent = isMe ? 'following' : hasContact ? 'unfollow' : 'follow';
     followBtn.classList.remove('primary', 'secondary');
     followBtn.classList.add(hasContact ? 'secondary' : 'primary');
     followBtn.hidden = false;
@@ -40,25 +46,49 @@ const updateFollowing = (evt: Event) => {
   if (evt.pubkey === config.pubkey) {
     localStorage.setItem('follwing', JSON.stringify(evt));
   }
-  if (view.type === 'profile') {
-    updateFollowBtn(view.id);
-    if (view.id === evt.pubkey) {
-      // update following link
-      const following = getViewElem('following') as HTMLElement;
-      if (following) {
-        const count = evt.tags.filter(isPTag).length;
-        const anchor = elem('a', {
-          data: {following: evt.pubkey},
-          href: `/${evt.id}`,
-          title: dateTime.format(evt.created_at * 1000),
-        }, [
-          'following ',
-          elem('span', {className: 'highlight'}, count),
-        ]);
-        following.replaceWith(anchor);
-        setViewElem('following', anchor);
+  switch(view.type) {
+    case 'contacts':
+      if (hasOwnContactList()) {
+        const lastContactList = contactHistoryMap[config.pubkey]?.at(1);
+        if (lastContactList) {
+          const [added, removed] = findChanges(evt, lastContactList);
+          [
+            ...added.map(([, pubkey]) => pubkey),
+            ...removed.map(([, pubkey]) => pubkey),
+          ].forEach(updateFollowBtn);
+        } else {
+          evt.tags
+            .filter(isPTag)
+            .forEach(([, pubkey]) => updateFollowBtn(pubkey));
+        }
       }
-    }
+      break;
+    case 'profile':
+      updateFollowBtn(view.id);
+      if (view.id === evt.pubkey) {
+        // update following link
+        const following = getViewElem('following') as HTMLElement;
+        if (following) {
+          const count = evt.tags.filter(isPTag).length;
+          const anchor = elem('a', {
+            data: {following: evt.pubkey},
+            href: `/contacts/${nip19.npubEncode(evt.pubkey)}`,
+            title: dateTime.format(evt.created_at * 1000),
+          }, [
+            'following ',
+            elem('span', {className: 'highlight'}, count),
+          ]);
+          following.replaceWith(anchor);
+          setViewElem('following', anchor);
+        }
+      }
+      break;
+  }
+};
+
+export const refreshFollowing = (id: string) => {
+  if (contactHistoryMap[id]?.at(0)) {
+    updateFollowing(contactHistoryMap[id][0]);
   }
 };
 
@@ -148,12 +178,29 @@ export const updateContactList = (evt: Event) => {
   return [evt.tags.filter(isPTag)];
 };
 
-export const getContacts = () => {
-  const following = contactHistoryMap[config.pubkey]?.at(0); // TODO: ensure newest contactlist
-  if (following) {
-    return following.tags
-      .filter(isPTag)
-      .map(([, pubkey]) => pubkey);
+/**
+ * returns list of pubkeys the given pubkey is following
+ * @param pubkey
+ * @returns {String[]} pubkeys
+ */
+export const getContacts = (pubkey: string) => {
+  const following = contactHistoryMap[pubkey]?.at(0);
+  if (!following) {
+    return [];
+  }
+  return following.tags
+    .filter(isPTag)
+    .map(([, pubkey]) => pubkey);
+};
+
+/**
+ * returns list of pubkeys the user is following, if none found it will try from localstorage
+ * @returns {String[]} pubkeys
+ */
+export const getOwnContacts = () => {
+  const following = getContacts(config.pubkey);
+  if (following.length) {
+    return following;
   }
   const followingFromStorage = localStorage.getItem('follwing');
   if (followingFromStorage) {
@@ -186,9 +233,9 @@ const updateContactTags = (
   ];
 };
 
-export const followContact = async (id: string) => {
-  const followBtn = getViewElem('followBtn') as HTMLButtonElement;
-  const statusElem = getViewElem('followStatus') as HTMLElement;
+export const followContact = async (pubkey: string) => {
+  const followBtn = getViewElem(`followBtn-${pubkey}`) as HTMLButtonElement;
+  const statusElem = getViewElem(`followStatus-${pubkey}`) as HTMLElement;
   if (!followBtn || !statusElem) {
     return;
   }
@@ -197,7 +244,7 @@ export const followContact = async (id: string) => {
     kind: 3,
     pubkey: config.pubkey,
     content: '',
-    tags: updateContactTags(id, following),
+    tags: updateContactTags(pubkey, following),
     created_at: Math.floor(Date.now() * 0.001),
   };
 
@@ -234,5 +281,4 @@ export const followContact = async (id: string) => {
       console.info(`event published by ${relay}`);
     });
   }
-
 };

src/index.html

@@ -6,7 +6,7 @@
     <meta name="apple-mobile-web-app-status-bar-style" content="default">
     <meta name="apple-mobile-web-app-capable" content="yes">
     <title>nostr</title>
-    <link rel="stylesheet" href="styles/main.css" type="text/css">
+    <link rel="stylesheet" href="/styles/main.css" type="text/css">
     <link rel="manifest" href="/manifest.json">
   </head>
   <body>
@@ -110,5 +110,5 @@
     </div>
 
   </body>
-  <script src="main.js"></script>
+  <script src="/main.js"></script>
 </html>

src/main.ts

@@ -4,15 +4,15 @@ import {elem} from './utils/dom';
 import {bounce} from './utils/time';
 import {isWssUrl} from './utils/url';
 import {closeSettingsView, config, toggleSettingsView} from './settings';
-import {subGlobalFeed, subEventID, subNote, subProfile, subPubkeys, subOwnContacts} from './subscriptions'
+import {subGlobalFeed, subEventID, subNote, subProfile, subPubkeys, subOwnContacts, subContactList} from './subscriptions'
 import {getReplyTo, hasEventTag, isEvent, isMention, sortByCreatedAt, sortEventCreatedAt} from './events';
 import {clearView, getViewContent, getViewElem, getViewOptions, setViewElem, view} from './view';
 import {handleReaction, handleUpvote} from './reactions';
 import {closePublishView, openWriteInput, togglePublishView} from './write';
 import {handleMetadata, renderProfile} from './profiles';
-import {followContact, getContactUpdateMessage, getContacts, resetContactList, setContactList, updateContactList, updateFollowBtn} from './contacts';
+import {followContact, getContactUpdateMessage, getContacts, getOwnContacts, refreshFollowing, resetContactList, setContactList, updateContactList, updateFollowBtn} from './contacts';
 import {EventWithNip19, EventWithNip19AndReplyTo, textNoteList, replyList} from './notes';
-import {createTextNote, renderEventDetails, renderRecommendServer, renderUpdateContact} from './ui';
+import {createContact, createTextNote, renderEventDetails, renderRecommendServer, renderUpdateContact} from './ui';
 
 // curl -H 'accept: application/nostr+json' https://relay.nostr.ch/
 
@@ -38,6 +38,18 @@ const renderNote = (
   setViewElem(evt.id, article);
 };
 
+const renderContact = (pubkey: string) => {
+  if (getViewElem(`contact-${pubkey}`)) { // contact already in view
+    updateFollowBtn(pubkey);
+    return;
+  }
+  const contact = createContact(pubkey);
+  if (contact) {
+    getViewContent().append(contact);
+    setViewElem(`contact-${pubkey}`, contact);
+  }
+};
+
 const hasEnoughPOW = (
   [tag, , commitment]: string[],
   eventId: string
@@ -64,12 +76,13 @@ const renderFeed = bounce(() => {
       ]
         .sort(sortByCreatedAt)
         .reverse()
-        .forEach(renderNote); // render in-reply-to
+        .forEach(renderNote);
 
       renderProfile(view.id);
+      refreshFollowing(view.id);
       break;
     case 'home':
-      const ids = getContacts();
+      const ids = getOwnContacts();
       [
         ...textNoteList
           .filter(note => ids.includes(note.pubkey)),
@@ -95,6 +108,10 @@ const renderFeed = bounce(() => {
         .reverse()
         .forEach(renderNote);
       break;
+    case 'contacts':
+      getContacts(view.id)
+        .forEach(renderContact);
+      break;
   }
 }, 17); // (16.666 rounded, an arbitrary value to limit updates to max 60x per s)
 
@@ -167,30 +184,35 @@ const handleContactList = (evt: Event, relay: string) => {
   // TODO: if newer and view.type === 'home' rerenderFeed()
   setContactList(evt);
   const view = getViewOptions();
+  if (getViewElem(evt.id)) {
+    return;
+  }
   if (
-    getViewElem(evt.id)
-    || view.type !== 'profile'
-    || view.id !== evt.pubkey
+    view.type === 'contacts'
+    && [view.id, config.pubkey].includes(evt.pubkey) // render if contact-list is from current users or current view
   ) {
+    renderFeed();
     return;
   }
-  // use find instead of sort?
-  const closestTextNotes = textNoteList.sort(sortEventCreatedAt(evt.created_at));
-  const closestNote = getViewElem(closestTextNotes[0].id);
-  if (!closestNote) {
-    // no close note, try later
-    setTimeout(() => handleContactList(evt, relay), 1500);
-    return;
-  };
-  const [addedContacts, removedContacts] = updateContactList(evt);
-  const content = getContactUpdateMessage(addedContacts, removedContacts);
-  if (!content.length) {
-    // P same as before, maybe only evt.content or 'a' tags changed?
-    return;
+  if (view.type === 'profile' && view.id === evt.pubkey) {
+    // use find instead of sort?
+    const closestTextNotes = textNoteList.sort(sortEventCreatedAt(evt.created_at));
+    const closestNote = getViewElem(closestTextNotes[0].id);
+    if (!closestNote) {
+      // no close note, try later
+      setTimeout(() => handleContactList(evt, relay), 1500);
+      return;
+    };
+    const [addedContacts, removedContacts] = updateContactList(evt);
+    const content = getContactUpdateMessage(addedContacts, removedContacts);
+    if (!content.length) {
+      // P same as before, maybe only evt.content or 'a' tags changed?
+      return;
+    }
+    const art = renderUpdateContact({...evt, content}, relay);
+    closestNote.after(art);
+    setViewElem(evt.id, art);
   }
-  const art = renderUpdateContact({...evt, content}, relay);
-  closestNote.after(art);
-  setViewElem(evt.id, art);
 };
 
 const handleRecommendServer = (evt: Event, relay: string) => {
@@ -243,10 +265,9 @@ const onEvent = (evt: Event, relay: string) => {
 
 // subscribe and change view
 const route = (path: string) => {
-  const contactList = getContacts();
   if (path === '/') {
+    const contactList = getOwnContacts();
     if (contactList.length) {
-      const {pubkey} = config;
       subPubkeys(contactList, onEvent);
       view(`/`, {type: 'home'});
     } else {
@@ -278,18 +299,25 @@ const route = (path: string) => {
         console.warn(`type ${type} not yet supported`);
     }
     renderFeed();
+  } else if (path.length === 73 && path.match(/^\/contacts\/npub[0-9a-z]+$/)) {
+    const contactNpub = path.slice(10);
+    const {type: contactType, data: contactPubkey} = nip19.decode(contactNpub);
+    if (contactType === 'npub') {
+      subContactList(contactPubkey, onEvent);
+      view(path, {type: 'contacts', id: contactPubkey});
+    }
   } else if (path.length === 65) {
     const eventID = path.slice(1);
     subEventID(eventID, onEventDetails);
     view(path, {type: 'event', id: eventID});
   } else {
-    console.warn('no support for ', path)
+    console.warn('no support for ', path);
   }
 };
 
 // onload
-subOwnContacts(onEvent);
 route(location.pathname);
+subOwnContacts(onEvent); // subscribe after route as routing unsubscribes current subs
 
 // only push a new entry if there is no history onload
 if (!history.length) {
@@ -317,6 +345,7 @@ const handleLink = (a: HTMLAnchorElement, e: MouseEvent) => {
     || href.startsWith('/feed')
     || href.startsWith('/note')
     || href.startsWith('/npub')
+    || href.startsWith('/contacts/npub')
     || (href.startsWith('/') && href.length === 65)
   ) {
     route(href);

src/profiles.ts

@@ -1,7 +1,7 @@
 import {Event} from 'nostr-tools';
 import {elem, elemCanvas, parseTextContent} from './utils/dom';
 import {getNoxyUrl} from './utils/url';
-import {getViewElem} from './view';
+import {getViewElem, getViewOptions} from './view';
 import {parseJSON} from './media';
 import {sortByCreatedAt} from './events';
 
@@ -87,10 +87,22 @@ export const handleMetadata = (evt: Event, relay: string) => {
         username.classList.add('mbox-kind0-name');
       });
   }
+  if (metadata.about) {
+    const about = getViewElem(`about-${evt.pubkey}`);
+    if (about) {
+      const view = getViewOptions();
+      about.replaceChildren(...parseTextContent(
+        view.type === 'contacts'
+          ? metadata.about.split('\n')[0]
+          : metadata.about
+      )[0]);
+    }
+  }
 };
 
 export const getMetadata = (pubkey: string) => {
   const user = profileMap[pubkey];
+  const about = user?.about;
   const name = user?.name;
   const userName = name || pubkey.slice(0, 8);
   // const userImg = user?.picture;
@@ -100,7 +112,7 @@ export const getMetadata = (pubkey: string) => {
     src: userImg,
     title: `${userName} on ${host} ${userAbout}`,
   }) : */ elemCanvas(pubkey);
-  return {img, name, userName};
+  return {about, img, name, userName};
 };
 
 export const renderProfile = (pubkey: string) => {
@@ -118,12 +130,11 @@ export const renderProfile = (pubkey: string) => {
       header.append(elem('h1', {}, metadata.name));
     }
   }
-  const detail = getViewElem('detail');
-  if (metadata.about) {
-    if (!detail.children.length) {
-      const [content] = parseTextContent(metadata.about);
-      detail?.append(...content);
-    }
+  console.log('render detail')
+  const detail = getViewElem(`detail-${pubkey}`);
+  if (metadata.about && !detail.children.length) {
+    const [content] = parseTextContent(metadata.about);
+    detail?.append(...content);
   }
   if (metadata.website) {
     const website = detail.querySelector('[data-website]');

src/styles/cards.css

@@ -19,6 +19,7 @@
   background-color: var(--bgcolor-textinput);
   border-radius: var(--profileimg-size);
   flex-basis: var(--profileimg-size);
+  flex-shrink: 0;
   height: var(--profileimg-size);
   margin-right: var(--gap-half);
   max-height: var(--profileimg-size);
@@ -57,9 +58,12 @@ a.mbox-img:focus {
 .mbox-replies .mbox-replies .mbox-img + .mbox-body {
   --max-width: calc(100% - var(--profileimg-size) + var(--gap-half));
 }
+.mbox-contact .mbox-img + .mbox-body {
+  --max-width: calc(100% - var(--profileimg-size) - var(--gap-half) - 90px);
+}
 
 .mbox-header {
-  align-items: start;
+  align-items: baseline;
   display: flex;
   gap: var(--gap-quarter);
   justify-content: space-between;
@@ -72,6 +76,7 @@ a.mbox-img:focus {
   text-decoration: none;
 }
 .mbox-header small {
+  color: var(--color-accent);
   white-space: nowrap;
 }
 
@@ -81,6 +86,35 @@ a.mbox-img:focus {
   color: var(--color-accent);
 }
 
+.mbox-contact {
+  align-items: start; /* TODO: maybe all .mbox element should have align-items start */
+  flex-wrap: nowrap;
+  padding: var(--gap-half);
+}
+.mbox-contact .mbox-header {
+  justify-content: start;
+}
+.mbox-contact .mbox-body {
+  flex-basis: 100%;
+  flex-grow: 1;
+  flex-shrink: 1;
+  min-width: 0; /* with this mbox-content displays text on one line cutting off text-overflo... */
+  padding-bottom: 0;
+}
+.mbox-contact .mbox-content {
+  overflow: clip;
+  padding-right: var(--gap-quarter);
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.mbox-cta {
+  align-items: center;
+  align-self: center;
+  display: flex;
+  white-space: nowrap;
+}
+
 .mbox-updated-contact,
 .mbox-recommend-server {
   padding-bottom: var(--gap-quarter);

src/styles/form.css

@@ -146,6 +146,10 @@ button:active {
 .secondary {
   background-color: transparent;
 }
+.secondary:disabled {
+  border-color: var(--color-accent);
+  color: var(--color-accent);
+}
 
 button:focus {
 }

src/styles/view.css

@@ -159,7 +159,10 @@ nav a {
 }
 .hero-title h1 {
   flex-grow: 1;
+  font-size: 2.1rem;
+  line-height: 1.285714285714286;
   margin-bottom: 0;
+  margin-top: 2rem;
   padding-left: var(--extra-space);
 }
 .hero-title button {
@@ -173,8 +176,9 @@ nav a {
 
 .hero .hero-npub {
   color: var(--color-accent);
-  font-size: 1.1rem;
   display: block;
+  font-size: 1.1rem;
+  line-height: 1.36363636;
   max-width: 100%;
   overflow: clip;
   text-align: center;

src/subscriptions.ts

@@ -1,5 +1,5 @@
 import {Event} from 'nostr-tools';
-import {getReplyTo, hasEventTag, isMention} from './events';
+import {getReplyTo, hasEventTag, isMention, isPTag} from './events';
 import {config} from './settings';
 import {sub, subOnce, unsubAll} from './relays';
 
@@ -288,3 +288,41 @@ export const subOwnContacts = (onEvent: SubCallback) => {
     unsub: true,
   });
 };
+
+export const subContactList = (
+  pubkey: string,
+  onEvent: SubCallback,
+) => {
+  unsubAll();
+  const pubkeys = new Set<string>();
+  let newestEvent = 0;
+  sub({
+    cb: (evt: Event, relay: string) => {
+      if (evt.created_at <= newestEvent) {
+        return;
+      }
+      newestEvent = evt.created_at;
+      const newPubkeys = evt.tags
+        .filter(isPTag)
+        .filter(([, p]) => !pubkeys.has(p))
+        .map(([, p]) => {
+          pubkeys.add(p);
+          return p
+        });
+      subOnce({
+        cb: onEvent,
+        filter: {
+          authors: newPubkeys,
+          kinds: [0],
+        },
+        relay,
+      });
+      onEvent(evt, relay);
+    },
+    filter: {
+      authors: [pubkey],
+      kinds: [3],
+      limit: 1,
+    },
+  });
+};

src/system.ts

@@ -88,7 +88,7 @@ export const powEvent = (
   statusElem.replaceChildren('working…', cancelBtn);
   statusElem.hidden = false;
   return new Promise((resolve, reject) => {
-    const worker = new Worker('./worker.js');
+    const worker = new Worker('/worker.js');
 
     const onCancel = () => {
       worker.terminate();

src/template.ts

@@ -16,6 +16,9 @@ export type ViewTemplateOptions = {
 } | {
   type: 'profile';
   id: string;
+} | {
+  type: 'contacts';
+  id: string;
 } | {
   type: 'event';
   id: string;
@@ -32,7 +35,8 @@ export const renderViewTemplate = (options: ViewTemplateOptions) => {
     case 'profile':
       const pubkey = options.id;
       const npub = nip19.npubEncode(pubkey);
-      const detail = elem('p');
+      const about = elem('span');
+      const detail = elem('p', {}, about);
       const followStatus = elem('small');
       const followBtn = elem('button', {
         className: 'primary',
@@ -51,15 +55,18 @@ export const renderViewTemplate = (options: ViewTemplateOptions) => {
         elem('footer', {}, following),
       ]);
       dom.header = profileHeader;
-      dom.detail = detail;
+      dom[`about-${pubkey}`] = about;
+      dom[`detail-${pubkey}`] = detail;
       dom.following = following;
-      dom.followStatus = followStatus;
-      dom.followBtn = followBtn;
+      dom[`followStatus-${pubkey}`] = followStatus;
+      dom[`followBtn-${pubkey}`] = followBtn;
       content.append(profileHeader);
       document.title = pubkey;
       break;
     case 'note':
       break;
+    case 'contacts':
+      break;
     case 'event':
       const id = options.id;
       content.append(

src/ui.ts

@@ -2,14 +2,15 @@ import {Event, nip19} from  'nostr-tools';
 import {Children, elem, elemArticle, parseTextContent} from './utils/dom';
 import {dateTime, formatTime} from './utils/time';
 import {/*validatePow,*/ sortByCreatedAt} from './events';
-import {setViewElem} from './view';
+import {getViewElem, getViewOptions, setViewElem} from './view';
 import {config} from './settings';
 import {getReactions, getReactionContents} from './reactions';
 import {openWriteInput} from './write';
 // import {linkPreview} from './media';
+import {parseJSON} from './media';
 import {getMetadata} from './profiles';
 import {EventWithNip19, replyList} from './notes';
-import {parseJSON} from './media';
+import {isFollowing} from './contacts';
 
 setInterval(() => {
   document.querySelectorAll('time[datetime]').forEach((timeElem: HTMLTimeElement) => {
@@ -179,3 +180,46 @@ export const renderEventDetails = (evt: Event, relay: string) => {
     data: {kind: evt.kind, id: evt.id, pubkey: evt.pubkey}
   });
 };
+
+export const createContact = (pubkey: string) => {
+  const {about: aboutContent, img, name, userName} = getMetadata(pubkey);
+  const npub = nip19.npubEncode(pubkey);
+  const view = getViewOptions();
+  if (view.type !== 'contacts') {
+    return null;
+  }
+  const isMe = config.pubkey === pubkey;
+  const isCurrentUser = view.id === pubkey;
+  const hasContact = isFollowing(pubkey);
+  const followStatus = elem('small');
+  const followBtn = elem('button', {
+      className: hasContact ? 'secondary' : 'primary',
+      ...(isMe && {disabled: true}),
+      name: 'follow',
+      data: {id: pubkey}
+    }, hasContact ? (isMe ? 'following' : 'unfollow') : 'follow');
+  const about = elem('div', {className: 'mbox-content'}, aboutContent);
+  setViewElem(`about-${pubkey}`, about);
+  setViewElem(`followStatus-${pubkey}`, followStatus);
+  setViewElem(`followBtn-${pubkey}`, followBtn);
+  return elemArticle([
+    elem('a', {className: 'mbox-img', href: `/${npub}`, tabIndex: -1}, img),
+    elem('div', {className: 'mbox-body'}, [
+      elem('header', {className: 'mbox-header'}, [
+        elem('a', {
+          className: `mbox-username${name ? ' mbox-kind0-name' : ''}`,
+          data: {profile: pubkey},
+          href: `/${npub}`,
+        }, name || userName),
+        (isMe || isCurrentUser)
+          ? elem('small', {}, isMe ? '(your user)' : '(current user)')
+           : null,
+      ]),
+      about,
+    ]),
+    elem('div', {className: 'mbox-cta'}, [followStatus, followBtn]),
+  ], {
+    className: 'mbox-contact',
+    data: {pubkey},
+  });
+};

src/view.ts

@@ -60,7 +60,7 @@ type GetViewOptions = () => ViewTemplateOptions;
 
 /**
  * get options for current view
- * @returns {id: 'home' | 'feed' | 'profile' | 'note' | 'event', id?: string}
+ * @returns {id: 'home' | 'feed' | 'profile' | 'note' | 'contacts' | 'event', id?: string}
 */
 export const getViewOptions: GetViewOptions = () => containers[activeContainerIndex]?.options || {type: 'feed'};