From 5d9a1047578f33e71fc721b19382858813355693 Mon Sep 17 00:00:00 2001
From: Jordan Doyle <jordan@doyle.la>
Date: Wed, 6 Jul 2022 12:54:40 +0100
Subject: [PATCH] Add tag view

---
 src/git.rs                 | 46 ++++++++++++++++++++++++++++++++++++++++++----
 src/methods/repo.rs        | 27 ++++++++++++++++++++++++++-
 statics/style.css          |  6 ++++++
 templates/repo/commit.html |  1 -
 templates/repo/tag.html    | 37 +++++++++++++++++++++++++++++++++++++
 5 files changed, 111 insertions(+), 6 deletions(-)
 create mode 100644 templates/repo/tag.html

diff --git a/src/git.rs b/src/git.rs
index b20f84d..f025d13 100644
--- a/src/git.rs
+++ b/src/git.rs
@@ -7,7 +7,7 @@ use std::{
 };
 
 use arc_swap::ArcSwapOption;
-use git2::{Oid, Repository, Signature};
+use git2::{ObjectType, Oid, Repository, Signature};
 use moka::future::Cache;
 use time::OffsetDateTime;
 
@@ -59,6 +59,29 @@ impl Git {
             .await
     }
 
+    pub async fn get_tag(&self, repo: PathBuf, tag_name: &str) -> DetailedTag {
+        let repo = Repository::open_bare(repo).unwrap();
+        let tag = repo
+            .find_reference(&format!("refs/tags/{tag_name}"))
+            .unwrap()
+            .peel_to_tag()
+            .unwrap();
+        let tag_target = tag.target().unwrap();
+
+        let tagged_object = match tag_target.kind() {
+            Some(ObjectType::Commit) => Some(TaggedObject::Commit(tag_target.id().to_string())),
+            Some(ObjectType::Tree) => Some(TaggedObject::Tree(tag_target.id().to_string())),
+            None | Some(_) => None,
+        };
+
+        DetailedTag {
+            name: tag_name.to_string(),
+            tagger: tag.tagger().map(Into::into),
+            message: tag.message().unwrap().to_string(),
+            tagged_object,
+        }
+    }
+
     pub async fn get_refs(&self, repo: PathBuf) -> Arc<Refs> {
         self.refs
             .get_with(repo.clone(), async {
@@ -114,11 +137,12 @@ impl Git {
                             continue;
                         };
 
-                        let object = object.to_object(&repo)
-                            .unwrap();
+                        let object = object.to_object(&repo).unwrap();
                         let blob = object.into_blob().unwrap();
 
-                        return Some(Arc::from(String::from_utf8(blob.content().to_vec()).unwrap()));
+                        return Some(Arc::from(
+                            String::from_utf8(blob.content().to_vec()).unwrap(),
+                        ));
                     }
 
                     None
@@ -219,6 +243,20 @@ pub struct Remote {
 }
 
 #[derive(Debug)]
+pub enum TaggedObject {
+    Commit(String),
+    Tree(String),
+}
+
+#[derive(Debug)]
+pub struct DetailedTag {
+    pub name: String,
+    pub tagger: Option<CommitUser>,
+    pub message: String,
+    pub tagged_object: Option<TaggedObject>,
+}
+
+#[derive(Debug)]
 pub struct Tag {
     pub name: String,
     pub tagger: Option<CommitUser>,
diff --git a/src/methods/repo.rs b/src/methods/repo.rs
index f75710c..8dd6269 100644
--- a/src/methods/repo.rs
+++ b/src/methods/repo.rs
@@ -16,7 +16,7 @@ use path_clean::PathClean;
 use serde::Deserialize;
 use tower::{util::BoxCloneService, Service};
 
-use crate::git::Refs;
+use crate::git::{DetailedTag, Refs};
 use crate::{git::Commit, layers::UnwrapInfallible, Git};
 
 #[derive(Clone)]
@@ -58,6 +58,7 @@ pub async fn service<ReqBody: Send + 'static>(mut request: Request<ReqBody>) -> 
         Some("commit") => BoxCloneService::new(handle_commit.into_service()),
         Some("diff") => BoxCloneService::new(handle_diff.into_service()),
         Some("stats") => BoxCloneService::new(handle_stats.into_service()),
+        Some("tag") => BoxCloneService::new(handle_tag.into_service()),
         Some(v) => {
             uri_parts.push(v);
             BoxCloneService::new(handle_summary.into_service())
@@ -90,6 +91,30 @@ pub async fn handle_summary(Extension(repo): Extension<Repository>) -> Html<Stri
 }
 
 #[derive(Deserialize)]
+pub struct TagQuery {
+    #[serde(rename = "h")]
+    name: String,
+}
+
+pub async fn handle_tag(
+    Extension(repo): Extension<Repository>,
+    Extension(RepositoryPath(repository_path)): Extension<RepositoryPath>,
+    Extension(git): Extension<Git>,
+    Query(query): Query<TagQuery>,
+) -> Html<String> {
+    #[derive(Template)]
+    #[template(path = "repo/tag.html")]
+    pub struct View {
+        repo: Repository,
+        tag: DetailedTag,
+    }
+
+    let tag = git.get_tag(repository_path, &query.name).await;
+
+    Html(View { repo, tag }.render().unwrap())
+}
+
+#[derive(Deserialize)]
 pub struct LogQuery {
     #[serde(rename = "ofs")]
     offset: Option<usize>,
diff --git a/statics/style.css b/statics/style.css
index c0e96ce..51cae2b 100644
--- a/statics/style.css
+++ b/statics/style.css
@@ -85,3 +85,9 @@ nav a.active {
     color: #000;
     background-color: #ccc;
 }
+
+pre.h2-first-line::first-line {
+    font-family: sans-serif;
+    font-size: 1.5em;
+    font-weight: bold;
+}
diff --git a/templates/repo/commit.html b/templates/repo/commit.html
index f4e13b7..70eeee2 100644
--- a/templates/repo/commit.html
+++ b/templates/repo/commit.html
@@ -34,5 +34,4 @@
 
 <h2>{{ commit.summary() }}</h2>
 <pre>{{ commit.body() }}</pre>
-
 {% endblock %}
\ No newline at end of file
diff --git a/templates/repo/tag.html b/templates/repo/tag.html
new file mode 100644
index 0000000..09bd4bb
--- /dev/null
+++ b/templates/repo/tag.html
@@ -0,0 +1,37 @@
+{% extends "repo/base.html" %}
+
+{% block content %}
+<table class="commit-info">
+    <tbody>
+    <tr>
+        <th>tag name</th>
+        <td>{{ tag.name }}</td>
+    </tr>
+    {% if let Some(tagger) = tag.tagger %}
+        <tr>
+            <th>tag date</th>
+            <td>{{ tagger.time() }}</td>
+        </tr>
+        <tr>
+            <th>tagged by</th>
+            <td>{{ tagger.name() }} &lt;{{ tagger.email() }}&gt;</td>
+        </tr>
+    {% endif %}
+    {% if let Some(tagged_object) = tag.tagged_object %}
+        <tr>
+            <th>tagged object</th>
+            <td>
+                {% match tagged_object %}
+                    {% when crate::git::TaggedObject::Commit with (commit) %}
+                        <a href="/{{ repo.display() }}/commit?id={{ commit }}">commit {{ commit.as_str()[0..10] }}...</a>
+                    {% when crate::git::TaggedObject::Tree with (tree) %}
+                        tree {{ tree }}
+                {% endmatch %}
+            </td>
+        </tr>
+    {% endif %}
+    </tbody>
+</table>
+
+<pre class="h2-first-line">{{ tag.message }}</pre>
+{% endblock %}
--
libgit2 1.7.2