1 files changed, 72 insertions, 0 deletions
diff --git a/third_party/rust/glean/src/private/string.rs b/third_party/rust/glean/src/private/string.rs
new file mode 100644
index 0000000000..0f11a016a9
--- /dev/null
+++ b/third_party/rust/glean/src/private/string.rs
@@ -0,0 +1,72 @@
+// 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/.
+
+use glean_core::Glean;
+use inherent::inherent;
+use std::sync::Arc;
+
+use glean_core::metrics::MetricType;
+use glean_core::ErrorType;
+
+use crate::dispatcher;
+
+// We need to wrap the glean-core type, otherwise if we try to implement
+// the trait for the metric in `glean_core::metrics` we hit error[E0117]:
+// only traits defined in the current crate can be implemented for arbitrary
+// types.
+
+/// This implements the developer facing API for recording string metrics.
+///
+/// Instances of this class type are automatically generated by the parsers
+/// at build time, allowing developers to record values that were previously
+/// registered in the metrics.yaml file.
+#[derive(Clone)]
+pub struct StringMetric(pub(crate) Arc<glean_core::metrics::StringMetric>);
+
+impl StringMetric {
+    /// The public constructor used by automatically generated metrics.
+    pub fn new(meta: glean_core::CommonMetricData) -> Self {
+        Self(Arc::new(glean_core::metrics::StringMetric::new(meta)))
+    }
+
+    /// Internal only, synchronous API for setting a string value.
+    pub(crate) fn set_sync<S: Into<std::string::String>>(&self, glean: &Glean, value: S) {
+        self.0.set(glean, value);
+    }
+}
+
+#[inherent(pub)]
+impl glean_core::traits::String for StringMetric {
+    fn set<S: Into<std::string::String>>(&self, value: S) {
+        let metric = Arc::clone(&self.0);
+        let new_value = value.into();
+        dispatcher::launch(move || crate::with_glean(|glean| metric.set(glean, new_value)));
+    }
+
+    fn test_get_value<'a, S: Into<Option<&'a str>>>(
+        &self,
+        ping_name: S,
+    ) -> Option<std::string::String> {
+        crate::block_on_dispatcher();
+
+        let queried_ping_name = ping_name
+            .into()
+            .unwrap_or_else(|| &self.0.meta().send_in_pings[0]);
+
+        crate::with_glean(|glean| self.0.test_get_value(glean, queried_ping_name))
+    }
+
+    fn test_get_num_recorded_errors<'a, S: Into<Option<&'a str>>>(
+        &self,
+        error: ErrorType,
+        ping_name: S,
+    ) -> i32 {
+        crate::block_on_dispatcher();
+
+        crate::with_glean_mut(|glean| {
+            glean_core::test_get_num_recorded_errors(&glean, self.0.meta(), error, ping_name.into())
+                .unwrap_or(0)
+        })
+    }
+}