nip10: add initial thread reply utils

These are some util helpers for nip10. It supports deprecated and marker
variants.

Signed-off-by: William Casarin <[email protected]>

Makefile

@@ -1,6 +1,5 @@
 
 tags: fake
-	find src *.rs | xargs ctags
-
+	find src -name '*.rs' | xargs ctags
 
 .PHONY: fake

src/lib.rs

@@ -21,6 +21,7 @@ mod result;
 mod subscription;
 mod tags;
 mod transaction;
+mod util;
 
 pub use block::{Block, BlockType, Blocks, Mention};
 pub use config::Config;
@@ -36,5 +37,6 @@ pub use result::Result;
 pub use subscription::Subscription;
 pub use tags::{Tag, TagIter, Tags, TagsIter};
 pub use transaction::Transaction;
+pub use util::nip10::{Marker, NoteIdRef, NoteReply};
 
 mod test_util;

src/ndb_str.rs

@@ -11,6 +11,22 @@ pub enum NdbStrVariant<'a> {
     Str(&'a str),
 }
 
+impl<'a> NdbStrVariant<'a> {
+    pub fn id(&self) -> Option<&'a [u8; 32]> {
+        match self {
+            Self::Id(id) => Some(id),
+            _ => None,
+        }
+    }
+
+    pub fn str(&self) -> Option<&'a str> {
+        match self {
+            Self::Str(s) => Some(s),
+            _ => None,
+        }
+    }
+}
+
 impl bindings::ndb_str {
     pub fn str(&self) -> *const ::std::os::raw::c_char {
         unsafe { self.__bindgen_anon_1.str_ }

src/tags.rs

@@ -15,18 +15,22 @@ impl<'a> Tag<'a> {
         unsafe { bindings::ndb_tag_count(self.as_ptr()) }
     }
 
-    pub fn get(&self, ind: u16) -> Option<NdbStr<'a>> {
-        if ind >= self.count() {
-            return None;
-        }
+    pub fn get_unchecked(&self, ind: u16) -> NdbStr<'a> {
         let nstr = unsafe {
             bindings::ndb_tag_str(
                 self.note().as_ptr(),
                 self.as_ptr(),
                 ind as ::std::os::raw::c_int,
             )
         };
-        Some(NdbStr::new(nstr, self.note))
+        NdbStr::new(nstr, self.note)
+    }
+
+    pub fn get(&self, ind: u16) -> Option<NdbStr<'a>> {
+        if ind >= self.count() {
+            return None;
+        }
+        Some(self.get_unchecked(ind))
     }
 
     pub fn note(&self) -> &'a Note<'a> {
@@ -172,7 +176,6 @@ impl<'a> Iterator for TagsIter<'a> {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
     use crate::config::Config;
     use crate::test_util;
     use crate::{Filter, Ndb, NdbStrVariant, Transaction};

src/util/mod.rs

@@ -0,0 +1 @@
+pub mod nip10;