1 files changed, 90 insertions, 0 deletions
diff --git a/toolkit/components/glean/api/src/ffi/event.rs b/toolkit/components/glean/api/src/ffi/event.rs
new file mode 100644
index 0000000000..6a433eda54
--- /dev/null
+++ b/toolkit/components/glean/api/src/ffi/event.rs
@@ -0,0 +1,90 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+#![cfg(feature = "with_gecko")]
+
+use nsstring::{nsACString, nsCString};
+use thin_vec::ThinVec;
+
+use crate::metrics::__glean_metric_maps as metric_maps;
+use crate::private::EventRecordingError;
+
+#[no_mangle]
+pub extern "C" fn fog_event_record(
+    id: u32,
+    extra_keys: &ThinVec<i32>,
+    extra_values: &ThinVec<nsCString>,
+) {
+    // If no extra keys are passed, we can shortcut here.
+    if extra_keys.is_empty() {
+        if metric_maps::event_record_wrapper(id, Default::default()).is_err() {
+            panic!("No event for id {}", id);
+        }
+
+        return;
+    }
+
+    assert_eq!(
+        extra_keys.len(),
+        extra_values.len(),
+        "Extra keys and values differ in length. ID: {}",
+        id
+    );
+
+    // Otherwise we need to decode them and pass them along.
+    let extra = extra_keys
+        .iter()
+        .zip(extra_values.iter())
+        .map(|(&k, v)| (k, v.to_string()))
+        .collect();
+    match metric_maps::event_record_wrapper(id, extra) {
+        Ok(()) => {}
+        Err(EventRecordingError::InvalidId) => panic!("No event for id {}", id),
+        Err(EventRecordingError::InvalidExtraKey) => {
+            panic!("Invalid extra keys in map for id {}", id)
+        }
+    }
+}
+
+#[no_mangle]
+pub extern "C" fn fog_event_record_str(
+    id: u32,
+    extra_keys: &ThinVec<nsCString>,
+    extra_values: &ThinVec<nsCString>,
+) {
+    // If no extra keys are passed, we can shortcut here.
+    if extra_keys.is_empty() {
+        if metric_maps::event_record_wrapper_str(id, Default::default()).is_err() {
+            panic!("No event for id {}", id);
+        }
+
+        return;
+    }
+
+    assert_eq!(
+        extra_keys.len(),
+        extra_values.len(),
+        "Extra keys and values differ in length. ID: {}",
+        id
+    );
+
+    // Otherwise we need to decode them and pass them along.
+    let extra = extra_keys
+        .iter()
+        .zip(extra_values.iter())
+        .map(|(k, v)| (k.to_string(), v.to_string()))
+        .collect();
+    match metric_maps::event_record_wrapper_str(id, extra) {
+        Ok(()) => {}
+        Err(EventRecordingError::InvalidId) => panic!("No event for id {}", id),
+        Err(EventRecordingError::InvalidExtraKey) => {
+            panic!("Invalid extra keys in map for id {}", id)
+        }
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn fog_event_test_has_value(id: u32, storage_name: &nsACString) -> bool {
+    metric_maps::event_test_get_value_wrapper(id, &storage_name.to_utf8()).is_some()
+}