feat(yt/download/hooks): Show progress of post-processors

Otherwise, `yt` will just show everything downloaded, but does not continue.
Now users see, what is _actually_ happening.

1 files changed, 36 insertions, 0 deletions

diff --git a/crates/yt_dlp/src/info_json.rs b/crates/yt_dlp/src/info_json.rs
index 402acb4..df49218 100644
--- a/crates/yt_dlp/src/info_json.rs
+++ b/crates/yt_dlp/src/info_json.rs
@@ -54,3 +54,39 @@ pub fn json_dumps(input: &Bound<'_, PyDict>) -> serde_json::Map<String, serde_js
         _ => unreachable!("These should not be json.dumps output"),
     }
 }
+
+/// # Panics
+/// If expectation about python operations fail.
+#[must_use]
+pub fn filter_dict(input: Bound<'_, PyDict>) -> Bound<'_, PyDict> {
+    let new_dict = PyDict::new(input.py());
+
+    input
+        .into_iter()
+        .filter_map(|(name, value)| {
+            let real_name = name.extract::<String>().expect("Should always be a string");
+
+            if real_name.starts_with('_') {
+                None
+            } else {
+                let value = if value.is_instance_of::<PyDict>() {
+                    filter_dict(
+                        value
+                            .cast_into::<PyDict>()
+                            .expect("to be a dict, because we checked"),
+                    )
+                    .into_any()
+                } else {
+                    value
+                };
+                Some((real_name, value))
+            }
+        })
+        .for_each(|(key, value)| {
+            new_dict
+                .set_item(&key, value)
+                .expect("This is a transposition, should always be valid");
+        });
+
+    new_dict
+}