nip52: add NIP-52 Calendar Events support

crates/nostr/src/event/builder.rs

@@ -1775,6 +1775,42 @@ impl EventBuilder {
         )))
     }
 
+    /// Date-Based Calendar Event
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    #[inline]
+    pub fn date_based_calendar_event(event: DateBasedCalendarEvent) -> Self {
+        let tags: Vec<Tag> = event.into();
+        Self::new(Kind::DateBasedCalendarEvent, "").tags(tags)
+    }
+
+    /// Time-Based Calendar Event
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    #[inline]
+    pub fn time_based_calendar_event(event: TimeBasedCalendarEvent) -> Self {
+        let tags: Vec<Tag> = event.into();
+        Self::new(Kind::TimeBasedCalendarEvent, "").tags(tags)
+    }
+
+    /// Calendar
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    #[inline]
+    pub fn calendar(calendar: Calendar) -> Self {
+        let tags: Vec<Tag> = calendar.into();
+        Self::new(Kind::Calendar, "").tags(tags)
+    }
+
+    /// Calendar Event RSVP
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    #[inline]
+    pub fn calendar_event_rsvp(rsvp: CalendarEventRsvp) -> Self {
+        let tags: Vec<Tag> = rsvp.into();
+        Self::new(Kind::CalendarEventRsvp, "").tags(tags)
+    }
+
     /// Label
     ///
     /// <https://github.com/nostr-protocol/nips/blob/master/32.md>

crates/nostr/src/event/kind.rs

@@ -175,6 +175,10 @@ kind_variants! {
     ChatMessage => 9, "Chat Message", "<https://github.com/nostr-protocol/nips/blob/master/C7.md>",
     Thread => 11, "Thread", "<https://github.com/nostr-protocol/nips/blob/master/7D.md>",
     WebBookmark => 39701, "Web Bookmark", "<https://github.com/nostr-protocol/nips/blob/master/B0.md>",
+    DateBasedCalendarEvent => 31922, "Date-based Calendar Event", "<https://github.com/nostr-protocol/nips/blob/master/52.md>",
+    TimeBasedCalendarEvent => 31923, "Time-based Calendar Event", "<https://github.com/nostr-protocol/nips/blob/master/52.md>",
+    Calendar => 31924, "Calendar", "<https://github.com/nostr-protocol/nips/blob/master/52.md>",
+    CalendarEventRsvp => 31925, "Calendar Event RSVP", "<https://github.com/nostr-protocol/nips/blob/master/52.md>",
 }
 
 impl PartialEq for Kind {

crates/nostr/src/event/tag/kind.rs

@@ -69,6 +69,10 @@ pub enum TagKind<'a> {
     Emoji,
     /// Encrypted
     Encrypted,
+    /// End (singular, NIP-52)
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    End,
     /// Ends
     Ends,
     /// Expiration
@@ -83,6 +87,10 @@ pub enum TagKind<'a> {
     File,
     /// Image
     Image,
+    /// Location
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    Location,
     /// License of the shared content
     ///
     /// <https://github.com/nostr-protocol/nips/blob/master/C0.md>
@@ -147,6 +155,10 @@ pub enum TagKind<'a> {
     Server,
     /// Size of the file in bytes
     Size,
+    /// Start (singular, NIP-52)
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    Start,
     /// Starts
     Starts,
     /// Status
@@ -336,12 +348,14 @@ impl<'a> TagKind<'a> {
             Self::Dim => "dim",
             Self::Emoji => "emoji",
             Self::Encrypted => "encrypted",
+            Self::End => "end",
             Self::Ends => "ends",
             Self::Expiration => "expiration",
             Self::Extension => "extension",
             Self::File => "file",
             Self::Head => "HEAD",
             Self::Image => "image",
+            Self::Location => "location",
             Self::License => "license",
             Self::Lnurl => "lnurl",
             Self::Magnet => "magnet",
@@ -369,6 +383,7 @@ impl<'a> TagKind<'a> {
             Self::Runtime => "runtime",
             Self::Server => "server",
             Self::Size => "size",
+            Self::Start => "start",
             Self::Starts => "starts",
             Self::Status => "status",
             Self::Streaming => "streaming",
@@ -415,11 +430,13 @@ impl<'a> From<&'a str> for TagKind<'a> {
             "dim" => Self::Dim,
             "emoji" => Self::Emoji,
             "encrypted" => Self::Encrypted,
+            "end" => Self::End,
             "ends" => Self::Ends,
             "expiration" => Self::Expiration,
             "extension" => Self::Extension,
             "file" => Self::File,
             "image" => Self::Image,
+            "location" => Self::Location,
             "license" => Self::License,
             "lnurl" => Self::Lnurl,
             "magnet" => Self::Magnet,
@@ -447,6 +464,7 @@ impl<'a> From<&'a str> for TagKind<'a> {
             "HEAD" => Self::Head,
             "server" => Self::Server,
             "size" => Self::Size,
+            "start" => Self::Start,
             "starts" => Self::Starts,
             "status" => Self::Status,
             "streaming" => Self::Streaming,

crates/nostr/src/event/tag/standard.rs

@@ -132,6 +132,10 @@ pub enum TagStandard {
     Hashtag(String),
     Geohash(String),
     Identifier(String),
+    /// Location
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/52.md>
+    Location(String),
     /// External Content ID
     ///
     /// <https://github.com/nostr-protocol/nips/blob/master/73.md>
@@ -517,6 +521,7 @@ impl TagStandard {
                 TagKind::Word => Ok(Self::Word(tag_1.to_string())),
                 TagKind::Alt => Ok(Self::Alt(tag_1.to_string())),
                 TagKind::Dim => Ok(Self::Dim(ImageDimensions::from_str(tag_1)?)),
+                TagKind::Location => Ok(Self::Location(tag_1.to_string())),
                 _ => Err(Error::UnknownStandardizedTag),
             };
         }
@@ -658,6 +663,7 @@ impl TagStandard {
                 character: Alphabet::D,
                 uppercase: false,
             }),
+            Self::Location(..) => TagKind::Location,
             Self::ExternalContent { uppercase, .. } => TagKind::SingleLetter(SingleLetterTag {
                 character: Alphabet::I,
                 uppercase: *uppercase,
@@ -901,6 +907,7 @@ impl From<TagStandard> for Vec<String> {
             TagStandard::Hashtag(t) => vec![tag_kind, t],
             TagStandard::Geohash(g) => vec![tag_kind, g],
             TagStandard::Identifier(d) => vec![tag_kind, d],
+            TagStandard::Location(loc) => vec![tag_kind, loc],
             TagStandard::Coordinate {
                 coordinate,
                 relay_url,

crates/nostr/src/nips/mod.rs

@@ -38,6 +38,7 @@ pub mod nip48;
 #[cfg(feature = "nip49")]
 pub mod nip49;
 pub mod nip51;
+pub mod nip52;
 pub mod nip53;
 pub mod nip56;
 #[cfg(feature = "nip57")]