- add: service discovery protocol using consul

auth-service/src/service_discovery.rs

@@ -0,0 +1,53 @@
+use std::collections::HashMap;
+use std::iter::Map;
+use consul::Client;
+use consul::health::Health;
+use reqwest::Response;
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+struct Address {
+    Address: String,
+    Port: u16,
+}
+
+#[derive(Deserialize)]
+struct TaggedAddresses {
+    lan_ipv4: Address,
+    wan_ipv4: Address,
+}
+
+#[derive(Deserialize)]
+struct Weights {
+    Passing: u8,
+    Warning: u8,
+}
+
+#[derive(Deserialize)]
+pub struct Service {
+    pub(crate) ID: String,
+    pub(crate) Service: String,
+    pub(crate) Tags: Vec<String>,
+    pub(crate) Port: u16,
+    pub(crate) Address: String,
+    pub(crate) TaggedAddresses: TaggedAddresses,
+    pub(crate) Weights: Weights,
+    pub(crate) EnableTagOverride: bool,
+    pub(crate) ContentHash: String,
+    pub(crate) Datacenter: String,
+}
+
+pub async fn get_service_address(consul_url: &str, service_name: &str) -> Result<(Service), Box<dyn std::error::Error>> {
+    let client = reqwest::Client::new();
+    let consul_service_url = format!("{}/v1/agent/service/{}", consul_url, service_name);
+
+    let response = client
+        .get(&consul_service_url)
+        .send()
+        .await?
+        .error_for_status()?
+        .json::<Service>()
+        .await?; // Ensure response is successful
+
+    Ok(response)
+}