Update validators again (#925)

* Update validators again

* fix tests + clippy

src/validate/rift.rs

@@ -0,0 +1,34 @@
+use crate::validate::{filter_out_packs, SupportedGameVersions, ValidationError, ValidationResult};
+use std::io::Cursor;
+use zip::ZipArchive;
+
+pub struct RiftValidator;
+
+impl super::Validator for RiftValidator {
+    fn get_file_extensions(&self) -> &[&str] {
+        &["jar"]
+    }
+
+    fn get_supported_loaders(&self) -> &[&str] {
+        &["rift"]
+    }
+
+    fn get_supported_game_versions(&self) -> SupportedGameVersions {
+        SupportedGameVersions::All
+    }
+
+    fn validate(
+        &self,
+        archive: &mut ZipArchive<Cursor<bytes::Bytes>>,
+    ) -> Result<ValidationResult, ValidationError> {
+        if archive.by_name("riftmod.json").is_err() {
+            return Ok(ValidationResult::Warning(
+                "No riftmod.json present for Rift file.",
+            ));
+        }
+
+        filter_out_packs(archive)?;
+
+        Ok(ValidationResult::Pass)
+    }
+}