sync: batch file identification via hash lookup

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I85d3f1265cad1996340ac98ac9ee1f7e6a6a6964

src/platform/multiplatform.rs

@@ -202,4 +202,31 @@ impl PlatformClient for MultiplatformPlatform {
       (Err(e), _) | (_, Err(e)) => Err(e),
     }
   }
+
+  async fn request_projects_from_hashes(
+    &self,
+    hashes: &[String],
+    algorithm: &str,
+  ) -> Result<Vec<Project>> {
+    let cf_future = self
+      .curseforge
+      .request_projects_from_hashes(hashes, algorithm);
+    let mr_future = self
+      .modrinth
+      .request_projects_from_hashes(hashes, algorithm);
+
+    let (cf_projects, mr_projects) = tokio::join!(cf_future, mr_future);
+
+    let mut all_projects = cf_projects?;
+    for mr_project in mr_projects? {
+      if !all_projects.iter().any(|p| {
+        p.id.get("modrinth") == mr_project.id.get("modrinth")
+          || p.id.get("curseforge") == mr_project.id.get("curseforge")
+      }) {
+        all_projects.push(mr_project);
+      }
+    }
+
+    Ok(all_projects)
+  }
 }