818 lines
22 KiB
Rust
818 lines
22 KiB
Rust
use std::collections::hash_map::DefaultHasher;
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use std::fmt;
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use std::hash::{Hash, Hasher};
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use std::str::FromStr;
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use anyhow::{Result, anyhow, bail};
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use nostr_sdk::prelude::*;
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pub(crate) const TIMELINE_WINDOW: usize = 50;
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const PREVIOUS_REFS: usize = 3;
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const PREVIOUS_REF_LEN: usize = 8;
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pub(crate) const RENDER_KINDS: [Kind; 5] = [
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Kind::TextNote,
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Kind::ChatMessage,
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Kind::Thread,
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Kind::Comment,
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Kind::Reaction,
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];
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pub(crate) const PIN_LIST: u16 = 39_005;
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pub(crate) const UPDATE_PIN_LIST: u16 = 9_010;
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pub(crate) const STATE_KINDS: [Kind; 5] = [
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Kind::GroupMetadata,
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Kind::GroupAdmins,
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Kind::GroupMembers,
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Kind::GroupRoles,
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Kind::Custom(PIN_LIST),
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];
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pub(crate) const MEMBERSHIP_KINDS: [Kind; 2] = [Kind::GroupPutUser, Kind::GroupRemoveUser];
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pub(crate) const ACTIVITY_KINDS: [Kind; 4] = [
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Kind::GroupPutUser,
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Kind::GroupRemoveUser,
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Kind::GroupJoinRequest,
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Kind::GroupLeaveRequest,
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];
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fn has_tag(tags: &Tags, name: &str) -> bool {
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tags.iter().any(|tag| tag.kind() == name)
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}
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fn tag_value<'a>(tags: &'a Tags, name: &str) -> Option<&'a str> {
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tags.iter()
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.find(|tag| tag.kind() == name)
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.and_then(|tag| tag.content())
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}
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#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub struct GroupId(String);
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impl GroupId {
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pub fn new(id: impl Into<String>) -> Result<Self> {
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let id = id.into();
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let id = id.trim();
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if id.is_empty() {
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bail!("group id is empty");
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}
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Ok(Self(id.to_owned()))
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}
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pub fn as_str(&self) -> &str {
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&self.0
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}
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pub fn h_tag(&self) -> Tag {
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Tag::custom("h", [self.0.clone()])
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}
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pub fn timeline_filter(&self, limit: usize) -> Filter {
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Filter::new()
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.custom_tag(SingleLetterTag::LOWERCASE_H, self.0.clone())
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.kinds(RENDER_KINDS)
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.kinds(ACTIVITY_KINDS)
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.limit(limit)
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}
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pub fn timeline_page(&self, limit: usize, until: Timestamp) -> Filter {
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self.timeline_filter(limit).until(until)
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}
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pub fn state_filters(&self) -> Vec<Filter> {
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STATE_KINDS
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.iter()
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.map(|kind| Filter::new().identifier(self.0.clone()).kind(*kind))
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.collect()
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}
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pub fn membership_filter(&self, me: PublicKey) -> Filter {
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Filter::new()
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.custom_tag(SingleLetterTag::LOWERCASE_H, self.0.clone())
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.custom_tag(SingleLetterTag::LOWERCASE_P, me.to_hex())
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.kinds(MEMBERSHIP_KINDS)
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}
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pub fn message(
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&self,
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content: &str,
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replies: &[EventId],
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previous: Option<Tag>,
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) -> EventBuilder {
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EventBuilder::new(Kind::ChatMessage, content)
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.tag(self.h_tag())
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.tags(replies.iter().copied().map(Tag::event))
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.tag_maybe(previous)
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}
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pub fn reaction(&self, target: EventId, emoji: &str, previous: Option<Tag>) -> EventBuilder {
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EventBuilder::new(Kind::Reaction, emoji)
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.tag(self.h_tag())
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.tag(Tag::event(target))
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.tag_maybe(previous)
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}
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pub fn join_request(&self, code: Option<&str>, reason: &str) -> EventBuilder {
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EventBuilder::new(Kind::GroupJoinRequest, reason)
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.tag(self.h_tag())
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.tag_maybe(code.map(|code| Tag::custom("code", [code])))
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}
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pub fn leave_request(&self, reason: &str) -> EventBuilder {
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EventBuilder::new(Kind::GroupLeaveRequest, reason).tag(self.h_tag())
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}
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pub fn remove_user(&self, public_key: PublicKey, previous: Option<Tag>) -> EventBuilder {
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EventBuilder::new(Kind::GroupRemoveUser, "")
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.tag(self.h_tag())
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.tag(Tag::public_key(public_key))
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.tag_maybe(previous)
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}
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pub fn edit_metadata(&self, metadata: &GroupMetadata, previous: Option<Tag>) -> EventBuilder {
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EventBuilder::new(Kind::GroupEditMetadata, "")
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.tags(self.metadata_tags(metadata))
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.tag_maybe(previous)
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}
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pub fn create_group(&self, metadata: &GroupMetadata, previous: Option<Tag>) -> EventBuilder {
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EventBuilder::new(Kind::GroupCreateGroup, "")
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.tags(self.metadata_tags(metadata))
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.tag_maybe(previous)
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}
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fn metadata_tags(&self, metadata: &GroupMetadata) -> Vec<Tag> {
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let mut tags = vec![self.h_tag()];
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for (name, value) in [
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("name", &metadata.name),
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("picture", &metadata.picture),
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("banner", &metadata.banner),
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("about", &metadata.about),
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] {
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if let Some(value) = value {
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tags.push(Tag::custom(name, [value.clone()]));
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}
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}
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for (name, set) in [
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("private", metadata.private),
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("restricted", metadata.restricted),
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("hidden", metadata.hidden),
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("closed", metadata.closed),
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("livekit", metadata.livekit),
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] {
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if set {
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tags.push(Tag::custom(name, Vec::<String>::new()));
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}
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}
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if let Some(parent) = &metadata.parent {
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tags.push(Tag::custom("parent", [parent.as_str()]));
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}
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for child in &metadata.children {
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tags.push(Tag::custom("child", [child.as_str()]));
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}
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if let Some(kinds) = &metadata.supported_kinds {
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tags.push(Tag::custom(
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"supported_kinds",
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kinds.iter().map(ToString::to_string),
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));
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}
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tags
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}
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pub fn delete_event(&self, id: EventId, previous: Option<Tag>) -> EventBuilder {
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EventBuilder::new(Kind::GroupDeleteEvent, "")
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.tag(self.h_tag())
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.tag(Tag::event(id))
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.tag_maybe(previous)
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}
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pub fn create_invite(&self, code: &str, previous: Option<Tag>) -> EventBuilder {
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EventBuilder::new(Kind::GroupCreateInvite, "")
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.tag(self.h_tag())
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.tag(Tag::custom("code", [code]))
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.tag_maybe(previous)
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}
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pub fn update_pin_list(&self, pins: &[Pin], previous: Option<Tag>) -> EventBuilder {
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EventBuilder::new(Kind::Custom(UPDATE_PIN_LIST), "")
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.tag(self.h_tag())
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.tags(pins.iter().map(Pin::tag))
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.tag_maybe(previous)
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}
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}
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impl fmt::Display for GroupId {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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f.write_str(&self.0)
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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pub struct GroupKey {
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relay: RelayUrl,
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id: GroupId,
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}
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impl GroupKey {
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pub fn new(relay: RelayUrl, id: GroupId) -> Self {
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Self { relay, id }
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}
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pub fn relay(&self) -> &RelayUrl {
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&self.relay
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}
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pub fn id(&self) -> &GroupId {
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&self.id
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}
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pub fn cache_tag(&self) -> String {
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format!("{}|{}", self.relay.as_str(), self.id)
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}
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pub fn uniq_id(&self) -> u64 {
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let mut hasher = DefaultHasher::new();
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self.hash(&mut hasher);
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hasher.finish()
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct GroupReference {
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id: GroupId,
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relay: RelayUrl,
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invite: Option<String>,
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}
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impl GroupReference {
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pub fn parse(input: &str) -> Result<Self> {
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let input = input.trim();
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let (address, query) = match input.split_once('?') {
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Some((address, query)) => (address, Some(query)),
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None => (input, None),
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};
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let coordinate = Nip19Coordinate::from_bech32(address)?;
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if coordinate.kind != Kind::GroupMetadata {
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bail!("not a group reference: kind {}", coordinate.kind);
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}
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let relay = coordinate
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.relays
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.first()
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.cloned()
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.ok_or_else(|| anyhow!("group reference has no relay hint"))?;
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let id = GroupId::new(coordinate.identifier.as_str())?;
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let invite = query
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.and_then(|query| {
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query
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.split('&')
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.find_map(|pair| pair.strip_prefix("invite="))
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})
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.map(str::to_owned);
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Ok(Self { id, relay, invite })
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}
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pub fn invite(&self) -> Option<&str> {
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self.invite.as_deref()
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}
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pub fn key(&self) -> GroupKey {
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GroupKey::new(self.relay.clone(), self.id.clone())
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}
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}
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impl FromStr for GroupReference {
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type Err = anyhow::Error;
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fn from_str(input: &str) -> Result<Self> {
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Self::parse(input)
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}
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}
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#[derive(Debug, Clone, Default)]
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pub struct GroupMetadata {
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pub name: Option<String>,
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pub picture: Option<String>,
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pub(crate) banner: Option<String>,
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pub about: Option<String>,
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pub private: bool,
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pub restricted: bool,
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pub hidden: bool,
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pub closed: bool,
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pub livekit: bool,
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pub parent: Option<GroupId>,
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pub children: Vec<GroupId>,
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pub supported_kinds: Option<Vec<Kind>>,
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id: Option<GroupId>,
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author: Option<PublicKey>,
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}
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impl GroupMetadata {
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pub fn parse(event: &Event) -> Result<Self> {
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if event.kind != Kind::GroupMetadata {
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bail!("not a group metadata event: kind {}", event.kind);
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}
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let identifier = event
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.tags
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.identifier()
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.ok_or_else(|| anyhow!("group metadata has no d tag"))?;
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let content: serde_json::Value =
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serde_json::from_str(event.content.as_str()).unwrap_or(serde_json::Value::Null);
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let field = |key: &str| -> Option<String> {
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content
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.get(key)
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.and_then(serde_json::Value::as_str)
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.map(str::to_owned)
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.or_else(|| tag_value(&event.tags, key).map(str::to_owned))
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};
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let mut supported_kinds: Option<Vec<Kind>> = None;
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for tag in event
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.tags
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.iter()
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.filter(|tag| tag.kind() == "supported_kinds")
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{
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let kinds = supported_kinds.get_or_insert_with(Vec::new);
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for value in tag.as_slice().iter().skip(1) {
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kinds.push(Kind::from_str(value)?);
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}
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}
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let parent = match tag_value(&event.tags, "parent") {
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Some(parent) => Some(GroupId::new(parent)?),
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None => None,
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};
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let mut children = Vec::new();
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for tag in event.tags.iter().filter(|tag| tag.kind() == "child") {
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if let Some(child) = tag.content() {
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children.push(GroupId::new(child)?);
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}
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}
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Ok(Self {
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name: field("name"),
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picture: field("picture"),
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banner: field("banner"),
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about: field("about"),
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private: has_tag(&event.tags, "private"),
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restricted: has_tag(&event.tags, "restricted"),
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hidden: has_tag(&event.tags, "hidden"),
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closed: has_tag(&event.tags, "closed"),
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livekit: has_tag(&event.tags, "livekit"),
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parent,
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children,
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supported_kinds,
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id: Some(GroupId::new(identifier)?),
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author: Some(event.pubkey),
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})
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}
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pub(crate) fn id(&self) -> Option<&GroupId> {
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self.id.as_ref()
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}
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pub fn name(&self) -> Option<&str> {
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self.name.as_deref()
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}
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pub fn supports(&self, kind: Kind) -> bool {
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match &self.supported_kinds {
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None => true,
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Some(kinds) => kinds.contains(&kind),
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}
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}
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pub fn naddr(&self, relay: &RelayUrl, invite: Option<&str>) -> Result<String> {
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let id = self.id.as_ref().ok_or_else(|| anyhow!("no id"))?;
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let author = self.author.ok_or_else(|| anyhow!("no author"))?;
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let coordinate = Coordinate::new(Kind::GroupMetadata, author).identifier(id.as_str());
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let address = Nip19Coordinate::new(coordinate, [relay.clone()]).to_bech32()?;
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Ok(match invite {
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Some(invite) => format!("{address}?invite={invite}"),
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None => address,
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})
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}
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}
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#[derive(Debug, Clone)]
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pub struct GroupCandidate {
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pub key: GroupKey,
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/// The timestamp of the metadata event the candidate was built from.
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pub(crate) created_at: Timestamp,
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pub(crate) metadata: GroupMetadata,
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}
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impl GroupCandidate {
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pub fn display_name(&self) -> &str {
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self.metadata
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.name()
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.unwrap_or_else(|| self.key.id().as_str())
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}
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pub fn display_image(&self) -> Option<&str> {
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self.metadata.picture.as_deref()
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}
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pub fn display_about(&self) -> Option<&str> {
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self.metadata.about.as_deref()
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}
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}
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#[derive(Debug, Clone, Default)]
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pub struct GroupAdmins(Vec<(PublicKey, Vec<String>)>);
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impl GroupAdmins {
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pub fn parse(event: &Event) -> Result<Self> {
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if event.kind != Kind::GroupAdmins {
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bail!("not a group admins event: kind {}", event.kind);
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}
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let mut admins = Vec::new();
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for tag in event.tags.iter().filter(|tag| tag.kind() == "p") {
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let mut fields = tag.as_slice().iter().skip(1);
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let public_key = fields
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.next()
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.ok_or_else(|| anyhow!("admin tag has no public key"))?;
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let public_key = PublicKey::from_hex(public_key)?;
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admins.push((public_key, fields.cloned().collect()));
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}
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Ok(Self(admins))
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}
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pub fn entries(&self) -> &[(PublicKey, Vec<String>)] {
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&self.0
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}
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pub fn contains(&self, public_key: &PublicKey) -> bool {
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self.0.iter().any(|(key, _)| key == public_key)
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}
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}
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#[derive(Debug, Clone, Default)]
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pub struct GroupMembers(Vec<PublicKey>);
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impl GroupMembers {
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pub fn parse(event: &Event) -> Result<Self> {
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if event.kind != Kind::GroupMembers {
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bail!("not a group members event: kind {}", event.kind);
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}
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Ok(Self(event.tags.public_keys().collect()))
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}
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pub fn iter(&self) -> impl Iterator<Item = &PublicKey> {
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self.0.iter()
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}
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pub fn len(&self) -> usize {
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self.0.len()
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}
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#[must_use]
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pub fn is_empty(&self) -> bool {
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self.len() == 0
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct Role {
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pub name: String,
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}
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#[derive(Debug, Clone, Default)]
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pub struct GroupRoles(Vec<Role>);
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impl GroupRoles {
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pub fn parse(event: &Event) -> Result<Self> {
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if event.kind != Kind::GroupRoles {
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bail!("not a group roles event: kind {}", event.kind);
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}
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let mut roles = Vec::new();
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for tag in event.tags.iter().filter(|tag| tag.kind() == "role") {
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let mut fields = tag.as_slice().iter().skip(1);
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let name = fields
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.next()
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.ok_or_else(|| anyhow!("role tag has no name"))?;
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roles.push(Role { name: name.clone() });
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}
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Ok(Self(roles))
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}
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pub fn roles(&self) -> &[Role] {
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&self.0
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum Pin {
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Event(EventId),
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Address(Coordinate),
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}
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|
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impl Pin {
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fn tag(&self) -> Tag {
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match self {
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Pin::Event(id) => Tag::event(*id),
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Pin::Address(coordinate) => Tag::coordinate(coordinate.clone(), None),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, Default)]
|
|
pub struct GroupPins(Vec<Pin>);
|
|
|
|
impl GroupPins {
|
|
pub fn parse(event: &Event) -> Result<Self> {
|
|
if event.kind != Kind::Custom(PIN_LIST) {
|
|
bail!("not a pinned list event: kind {}", event.kind);
|
|
}
|
|
|
|
let mut pins = Vec::new();
|
|
|
|
for tag in event.tags.iter() {
|
|
match tag.kind() {
|
|
"e" => {
|
|
let Some(id) = tag.content() else {
|
|
continue;
|
|
};
|
|
|
|
pins.push(Pin::Event(EventId::from_hex(id)?));
|
|
}
|
|
"a" => {
|
|
let Some(address) = tag.content() else {
|
|
continue;
|
|
};
|
|
|
|
pins.push(Pin::Address(Coordinate::from_str(address)?));
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
|
|
Ok(Self(pins))
|
|
}
|
|
|
|
pub fn pins(&self) -> &[Pin] {
|
|
&self.0
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub(crate) struct GroupListEntry {
|
|
pub id: GroupId,
|
|
pub relay: RelayUrl,
|
|
pub name: Option<String>,
|
|
}
|
|
|
|
#[derive(Debug, Clone, Default)]
|
|
pub(crate) struct GroupList(Vec<GroupListEntry>);
|
|
|
|
impl GroupList {
|
|
pub fn parse(event: &Event) -> Result<Self> {
|
|
if event.kind != Kind::SimpleGroups {
|
|
bail!("not a group list event: kind {}", event.kind);
|
|
}
|
|
|
|
let mut entries = Vec::new();
|
|
|
|
for tag in event.tags.iter().filter(|tag| tag.kind() == "group") {
|
|
let fields = tag.as_slice();
|
|
|
|
let (Some(id), Some(relay)) = (fields.get(1), fields.get(2)) else {
|
|
continue;
|
|
};
|
|
|
|
let Ok(id) = GroupId::new(id.as_str()) else {
|
|
continue;
|
|
};
|
|
let Ok(relay) = RelayUrl::parse(relay.as_str()) else {
|
|
continue;
|
|
};
|
|
|
|
entries.push(GroupListEntry {
|
|
id,
|
|
relay,
|
|
name: fields.get(3).cloned(),
|
|
});
|
|
}
|
|
|
|
Ok(Self(entries))
|
|
}
|
|
|
|
pub fn entries(&self) -> &[GroupListEntry] {
|
|
&self.0
|
|
}
|
|
|
|
pub fn upsert(&mut self, entry: GroupListEntry) {
|
|
match self
|
|
.0
|
|
.iter_mut()
|
|
.find(|existing| existing.id == entry.id && existing.relay == entry.relay)
|
|
{
|
|
Some(existing) => *existing = entry,
|
|
None => self.0.push(entry),
|
|
}
|
|
}
|
|
|
|
pub fn remove(&mut self, key: &GroupKey) {
|
|
self.0
|
|
.retain(|entry| entry.id != *key.id() || entry.relay != *key.relay());
|
|
}
|
|
|
|
pub fn to_builder(&self) -> EventBuilder {
|
|
let mut tags: Vec<Tag> = Vec::with_capacity(self.0.len() * 2);
|
|
|
|
for entry in &self.0 {
|
|
let mut values = vec![
|
|
entry.id.as_str().to_owned(),
|
|
entry.relay.as_str().to_owned(),
|
|
];
|
|
|
|
if let Some(name) = &entry.name {
|
|
values.push(name.clone());
|
|
}
|
|
|
|
tags.push(Tag::custom("group", values));
|
|
tags.push(Tag::custom("r", [entry.relay.as_str()]));
|
|
}
|
|
|
|
EventBuilder::new(Kind::SimpleGroups, "").tags(tags)
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub enum Membership {
|
|
Unknown,
|
|
Pending { since: Timestamp },
|
|
Member,
|
|
Refused { reason: Option<String> },
|
|
Removed,
|
|
}
|
|
|
|
impl Membership {
|
|
pub fn status(&self) -> Option<&'static str> {
|
|
match self {
|
|
Self::Pending { .. } => Some("Requested"),
|
|
Self::Refused { .. } => Some("Refused"),
|
|
Self::Removed => Some("Removed"),
|
|
Self::Member | Self::Unknown => None,
|
|
}
|
|
}
|
|
|
|
pub fn from_events(events: &[Event], me: PublicKey) -> Self {
|
|
let mut latest: Option<&Event> = None;
|
|
|
|
for event in events {
|
|
if !MEMBERSHIP_KINDS.contains(&event.kind) {
|
|
continue;
|
|
}
|
|
|
|
if !event.tags.public_keys().any(|key| key == me) {
|
|
continue;
|
|
}
|
|
|
|
let newer = match latest {
|
|
None => true,
|
|
Some(current) => {
|
|
event.created_at > current.created_at
|
|
|| (event.created_at == current.created_at
|
|
&& current.kind == Kind::GroupPutUser
|
|
&& event.kind == Kind::GroupRemoveUser)
|
|
}
|
|
};
|
|
|
|
if newer {
|
|
latest = Some(event);
|
|
}
|
|
}
|
|
|
|
match latest {
|
|
Some(event) if event.kind == Kind::GroupRemoveUser => Membership::Removed,
|
|
Some(_) => Membership::Member,
|
|
None => Membership::Unknown,
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
pub struct Activity {
|
|
pub id: EventId,
|
|
pub kind: Kind,
|
|
pub author: PublicKey,
|
|
pub target: Option<PublicKey>,
|
|
pub roles: Vec<String>,
|
|
pub created_at: Timestamp,
|
|
}
|
|
|
|
impl Activity {
|
|
pub fn parse(event: &Event) -> Result<Self> {
|
|
if !ACTIVITY_KINDS.contains(&event.kind) {
|
|
bail!("not a group activity event: kind {}", event.kind);
|
|
}
|
|
|
|
let mut fields = event
|
|
.tags
|
|
.iter()
|
|
.find(|tag| tag.kind() == "p")
|
|
.map(|tag| tag.as_slice().iter().skip(1))
|
|
.into_iter()
|
|
.flatten();
|
|
|
|
let target = match fields.next() {
|
|
Some(value) => Some(PublicKey::from_hex(value)?),
|
|
None => None,
|
|
};
|
|
|
|
if target.is_none() && MEMBERSHIP_KINDS.contains(&event.kind) {
|
|
bail!("a membership event has no p tag");
|
|
}
|
|
|
|
Ok(Self {
|
|
id: event.id,
|
|
kind: event.kind,
|
|
author: event.pubkey,
|
|
target,
|
|
roles: fields.cloned().collect(),
|
|
created_at: event.created_at,
|
|
})
|
|
}
|
|
|
|
pub fn subject(&self) -> PublicKey {
|
|
match self.kind {
|
|
Kind::GroupPutUser | Kind::GroupRemoveUser => self.target.unwrap_or(self.author),
|
|
_ => self.author,
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug, Clone, Default)]
|
|
pub(crate) struct TimelineWindow(Vec<Event>);
|
|
|
|
impl TimelineWindow {
|
|
pub fn new() -> Self {
|
|
Self(Vec::new())
|
|
}
|
|
|
|
pub fn push(&mut self, event: Event) {
|
|
self.0.retain(|existing| existing.id != event.id);
|
|
let position = self.0.partition_point(|e| e.created_at > event.created_at);
|
|
|
|
self.0.insert(position, event);
|
|
self.0.truncate(TIMELINE_WINDOW);
|
|
}
|
|
|
|
pub fn remove(&mut self, id: EventId) {
|
|
self.0.retain(|event| event.id != id);
|
|
}
|
|
|
|
pub fn previous_tag(&self, me: PublicKey) -> Option<Tag> {
|
|
let references: Vec<String> = self
|
|
.0
|
|
.iter()
|
|
.filter(|event| event.pubkey != me)
|
|
.take(PREVIOUS_REFS)
|
|
.map(|event| event.id.to_hex().chars().take(PREVIOUS_REF_LEN).collect())
|
|
.collect();
|
|
|
|
if references.is_empty() {
|
|
None
|
|
} else {
|
|
Some(Tag::custom("previous", references))
|
|
}
|
|
}
|
|
}
|