sigstat 0.0.3-beta.2

Statsig Rust SDK for usage in multi-user server environments.
Documentation 
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use std::{collections::HashMap, sync::Arc};

use async_trait::async_trait;

use crate::observability::ops_stats::OpsStatsEventObserver;

use super::ops_stats::OpsStatsEvent;
#[derive(Clone)]
pub enum MetricType {
    Increment,
    Gauge,
    Dist,
}

#[derive(Clone)]
pub struct ObservabilityEvent {
    pub metric_type: MetricType,
    pub metric_name: String,
    pub value: f64,
    pub tags: Option<HashMap<String, String>>,
}

impl ObservabilityEvent {
    pub fn new_event(
        metric_type: MetricType,
        metric_name: String,
        value: f64,
        tags: Option<HashMap<String, String>>,
    ) -> OpsStatsEvent {
        OpsStatsEvent::ObservabilityEvent(ObservabilityEvent {
            metric_type,
            metric_name,
            value,
            tags,
        })
    }
}
pub trait ObservabilityClient: Send + Sync + 'static + OpsStatsEventObserver {
    fn init(&self);
    fn increment(&self, metric_name: String, value: f64, tags: Option<HashMap<String, String>>);
    fn gauge(&self, metric_name: String, value: f64, tags: Option<HashMap<String, String>>);
    fn dist(&self, metric_name: String, value: f64, tags: Option<HashMap<String, String>>);
    // This is needed since upper casting is not officially supported yet
    // (WIP to support https://github.com/rust-lang/rust/issues/65991)
    // For implementation, just return Self; should be sufficient
    fn to_ops_stats_event_observer(self: Arc<Self>) -> Arc<dyn OpsStatsEventObserver>;
}

#[async_trait]
impl<T: ObservabilityClient> OpsStatsEventObserver for T {
    async fn handle_event(&self, event: OpsStatsEvent) {
        if let OpsStatsEvent::ObservabilityEvent(data) = event {
            let metric_name = format!("statsig.sdk.{}", data.clone().metric_name);
            match data.clone().metric_type {
                MetricType::Increment => self.increment(metric_name, data.value, data.tags),
                MetricType::Gauge => self.gauge(metric_name, data.value, data.tags),
                MetricType::Dist => self.dist(metric_name, data.value, data.tags),
            };
        }
    }
}