From 608d211083e2db46f673c797bc684aaf6912afc6 Mon Sep 17 00:00:00 2001
From: Sebastian Martinez <me@sebastinez.dev>
Date: Wed, 25 Sep 2024 16:51:21 +0200
Subject: [PATCH] Add `repo::diff` tauri command

---
 src-tauri/bindings/Patch.ts       |  2 ++
 src-tauri/bindings/Stats.ts       |  7 +++++++
 src-tauri/src/commands/repos.rs   | 20 ++++++++++++++++++++
 src-tauri/src/lib.rs              |  1 +
 src-tauri/src/types/cobs.rs       | 24 ++++++++++++++++++++++++
 src/components/PatchTeaser.svelte |  6 ++++++
 src/views/repo/Patches.svelte     |  2 +-
 7 files changed, 61 insertions(+), 1 deletion(-)
 create mode 100644 src-tauri/bindings/Stats.ts

diff --git a/src-tauri/bindings/Patch.ts b/src-tauri/bindings/Patch.ts
index 94dfb7077..e70ff8a62 100644
--- a/src-tauri/bindings/Patch.ts
+++ b/src-tauri/bindings/Patch.ts
@@ -5,6 +5,8 @@ export type Patch = {
   id: string;
   author: Author;
   title: string;
+  base: string;
+  head: string;
   state:
     | {
         status: "draft";
diff --git a/src-tauri/bindings/Stats.ts b/src-tauri/bindings/Stats.ts
new file mode 100644
index 000000000..fd2d8e6b3
--- /dev/null
+++ b/src-tauri/bindings/Stats.ts
@@ -0,0 +1,7 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type Stats = {
+  files_changed: number;
+  insertions: number;
+  deletions: number;
+};
diff --git a/src-tauri/src/commands/repos.rs b/src-tauri/src/commands/repos.rs
index 93e6dd859..8b11c9a23 100644
--- a/src-tauri/src/commands/repos.rs
+++ b/src-tauri/src/commands/repos.rs
@@ -1,8 +1,10 @@
 use radicle::identity::RepoId;
+use radicle::storage::ReadRepository;
 use radicle::storage::ReadStorage;
 
 use crate::error::Error;
 use crate::types;
+use crate::types::cobs;
 use crate::AppState;
 
 /// List all repos.
@@ -40,3 +42,21 @@ pub fn repo_by_id(
 
     Ok::<_, Error>(repo_info)
 }
+
+#[tauri::command]
+pub async fn diff(
+    ctx: tauri::State<'_, AppState>,
+    rid: RepoId,
+    base: String,
+    head: String,
+) -> Result<cobs::Stats, Error> {
+    let (repo, _) = ctx.repo(rid)?;
+    let repo = radicle_surf::Repository::open(repo.path())?;
+    let base = repo.commit(base)?;
+    let commit = repo.commit(head)?;
+    let diff = repo.diff(base.id, commit.id)?;
+
+    let stats = diff.stats();
+
+    Ok::<_, Error>(cobs::Stats::new(stats))
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index f7dd10ad3..0a5522255 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -140,6 +140,7 @@ pub fn run() {
             auth::authenticate,
             repos::list_repos,
             repos::repo_by_id,
+            repos::diff,
             cobs::list_issues,
             cobs::issues_by_id,
             cobs::list_patches,
diff --git a/src-tauri/src/types/cobs.rs b/src-tauri/src/types/cobs.rs
index 90ad29920..9bd398561 100644
--- a/src-tauri/src/types/cobs.rs
+++ b/src-tauri/src/types/cobs.rs
@@ -78,6 +78,10 @@ pub struct Patch {
     id: String,
     author: Author,
     title: String,
+    #[ts(as = "String")]
+    base: git::Oid,
+    #[ts(as = "String")]
+    head: git::Oid,
     #[ts(type = r#"{
   status: 'draft'
 } | {
@@ -104,6 +108,8 @@ impl Patch {
             author: Author::new(*patch.author().id(), aliases),
             title: patch.title().to_string(),
             state: patch.state().clone(),
+            base: *patch.base(),
+            head: *patch.head(),
             assignees: patch
                 .assignees()
                 .map(|did| Author::new(did, aliases))
@@ -458,3 +464,21 @@ impl CobOptions {
         self.announce.unwrap_or(true)
     }
 }
+
+#[derive(TS, Serialize)]
+#[ts(export)]
+pub struct Stats {
+    pub files_changed: usize,
+    pub insertions: usize,
+    pub deletions: usize,
+}
+
+impl Stats {
+    pub fn new(stats: &radicle_surf::diff::Stats) -> Self {
+        Self {
+            files_changed: stats.files_changed,
+            insertions: stats.insertions,
+            deletions: stats.deletions,
+        }
+    }
+}
diff --git a/src/components/PatchTeaser.svelte b/src/components/PatchTeaser.svelte
index 137255061..922b70e09 100644
--- a/src/components/PatchTeaser.svelte
+++ b/src/components/PatchTeaser.svelte
@@ -1,13 +1,16 @@
 <script lang="ts">
   import type { Patch } from "@bindings/Patch";
+  import type { Stats } from "@bindings/Stats";
 
   import { formatOid, formatTimestamp } from "@app/lib/utils";
+  import { invoke } from "@tauri-apps/api/core";
 
   import Icon from "./Icon.svelte";
   import InlineTitle from "./InlineTitle.svelte";
   import NodeId from "./NodeId.svelte";
 
   export let patch: Patch;
+  export let rid: string;
 
   const statusColor: Record<Patch["state"]["status"], string> = {
     draft: "var(--color-fill-gray)",
@@ -78,6 +81,9 @@
     </div>
   </div>
   <div class="global-flex">
+    {#await invoke<Stats>( "diff", { rid, base: patch.base, head: patch.head }, ) then stats}
+      <div>{stats.insertions} / {stats.deletions}</div>
+    {/await}
     {#each patch.labels as label}
       <div class="global-counter txt-small">{label}</div>
     {/each}
diff --git a/src/views/repo/Patches.svelte b/src/views/repo/Patches.svelte
index a59f8f481..6bc726dcf 100644
--- a/src/views/repo/Patches.svelte
+++ b/src/views/repo/Patches.svelte
@@ -117,7 +117,7 @@
 
   <div class="list">
     {#each patches as patch}
-      <PatchTeaser {patch} />
+      <PatchTeaser rid={repo.rid} {patch} />
     {/each}
 
     {#if patches.length === 0}