cli: Support patch commenting

Allow commenting on a patch as well an issue.

Signed-off-by: Slack Coder <slackcoder@server.ky>

radicle-cli/examples/rad-patch.md

@@ -107,3 +107,9 @@ ok Analyzing remotes...
 ok Patch 15141cf1497627e2db54362972dd9533f62d1dcb updated 🌱
 
 ```
+
+And lets leave a quick comment for our team:
+
+```
+$ rad comment 15141cf1497627e2db54362972dd9533f62d1dcb --message 'I cannot wait to get back to the 90s!'
+```

radicle-cli/src/commands/comment.rs

@@ -5,6 +5,7 @@ use anyhow::anyhow;
 
 use radicle::cob;
 use radicle::cob::issue::Issues;
+use radicle::cob::patch::Patches;
 use radicle::cob::store;
 use radicle::prelude::*;
 use radicle::storage;
@@ -93,15 +94,28 @@ fn comment(
     }
 
     let mut issues = Issues::open(*signer.public_key(), repo)?;
-    let mut issue = issues.get_mut(&options.id).map_err(|e| match e {
-        store::Error::NotFound(_, _) => anyhow::anyhow!("Could not find issue {}", options.id),
-        _ => e.into(),
-    })?;
-    let (comment_id, _) = issue.comments().next().expect("root comment always exists");
+    match issues.get_mut(&options.id) {
+        Ok(mut issue) => {
+            let (comment_id, _) = issue.comments().next().expect("root comment always exists");
+            issue.comment(message, *comment_id, &signer)?;
+            return Ok(());
+        }
+        Err(store::Error::NotFound(_, _)) => {}
+        Err(e) => return Err(e.into()),
+    }
 
-    issue.comment(message, *comment_id, &signer)?;
+    let mut patches = Patches::open(*signer.public_key(), repo)?;
+    match patches.get_mut(&options.id) {
+        Ok(mut patch) => {
+            let (revision_id, _) = patch.revisions().last().expect("patch has a revision");
+            patch.comment(*revision_id, message, None, &signer)?;
+            return Ok(());
+        }
+        Err(store::Error::NotFound(_, _)) => {}
+        Err(e) => return Err(e.into()),
+    }
 
-    Ok(())
+    anyhow::bail!("Couldn't find issue or patch {}", options.id)
 }
 
 pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {

radicle/src/cob/patch.rs

@@ -573,13 +573,13 @@ impl store::Transaction<Patch> {
         &mut self,
         revision: RevisionId,
         body: S,
-        reply_to: CommentId,
+        reply_to: Option<CommentId>,
     ) -> OpId {
         self.push(Action::Thread {
             revision,
             action: thread::Action::Comment {
                 body: body.to_string(),
-                reply_to: Some(reply_to),
+                reply_to,
             },
         })
     }
@@ -696,7 +696,7 @@ impl<'a, 'g> PatchMut<'a, 'g> {
         &mut self,
         revision: RevisionId,
         body: S,
-        reply_to: CommentId,
+        reply_to: Option<CommentId>,
         signer: &G,
     ) -> Result<CommentId, Error> {
         self.transaction("Comment", signer, |tx| tx.comment(revision, body, reply_to))
@@ -1064,6 +1064,38 @@ mod test {
         assert_eq!(revision.base, base);
     }
 
+    #[test]
+    fn test_patch_discussion() {
+        let tmp = tempfile::tempdir().unwrap();
+        let (_, signer, project) = test::setup::context(&tmp);
+        let mut patches = Patches::open(*signer.public_key(), &project).unwrap();
+        let patch = patches
+            .create(
+                "My first patch",
+                "Blah blah blah.",
+                MergeTarget::Delegates,
+                git::Oid::try_from("cb18e95ada2bb38aadd8e6cef0963ce37a87add3").unwrap(),
+                git::Oid::try_from("e2a85016a458cd809c0ecee81f8c99613b0b0945").unwrap(),
+                &[],
+                &signer,
+            )
+            .unwrap();
+
+        let id = patch.id;
+        let mut patch = patches.get_mut(&id).unwrap();
+        let (revision_id, _) = patch.revisions().last().unwrap();
+        assert!(
+            patch
+                .comment(*revision_id, "patch comment", None, &signer)
+                .is_ok(),
+            "can comment on patch"
+        );
+
+        let (_, revision) = patch.revisions().last().unwrap();
+        let (_, comment) = revision.discussion.first().unwrap();
+        assert_eq!("patch comment", comment.body(), "comment body untouched");
+    }
+
     #[test]
     fn test_patch_merge() {
         let tmp = tempfile::tempdir().unwrap();