Add single email sending

Cargo.toml

@@ -16,6 +16,7 @@ name = "zero2prod"
 axum = "0.7.4"
 config = "0.14.0"
 once_cell = "1.19.0"
+reqwest = { version = "0.11.24", features = ["json"], default-features = false }
 secrecy = { version = "0.8.0", features = ["serde"] }
 serde = { version = "1.0.196", features = ["derive"] }
 serde-aux = { version = "4.4.0", default-features = false }
@@ -36,4 +37,6 @@ validator = "0.16.1"
 claims = "0.7.1"
 fake = "2.9.2"
 proptest = "1.4.0"
-reqwest = "0.11.24"
+serde_json = "1.0.114"
+tokio = { version = "1.36.0", features = ["macros", "rt"] }
+wiremock = "0.6.0"

configuration/base.yaml

@@ -6,3 +6,8 @@ database:
   username: postgres
   password: password
   database_name: newsletter
+email_client:
+  base_url: localhost
+  sender_email: test@orzechowski.tech
+  authorization_token: my-secret-token
+  timeout_milliseconds: 10000

configuration/production.yaml

@@ -2,3 +2,6 @@ application:
   host: ::0
 database:
   require_ssl: true
+email_client:
+  base_url: https://api.postmarkapp.com
+  sender_email: zero2prod@orzechowski.tech

src/app_state.rs

@@ -0,0 +1,8 @@
+use crate::email_client::EmailClient;
+use sqlx::PgPool;
+
+#[derive(Clone)]
+pub struct AppState {
+    pub db_pool: PgPool,
+    pub email_client: EmailClient,
+}

src/configuration.rs

@@ -1,16 +1,19 @@
+use crate::domain::SubscriberEmail;
 use secrecy::{ExposeSecret, Secret};
 use serde::Deserialize;
 use serde_aux::field_attributes::deserialize_number_from_string;
 use sqlx::{
     postgres::{PgConnectOptions, PgSslMode},
     ConnectOptions,
 };
+use std::time::Duration;
 use tracing_log::log::LevelFilter;
 
 #[derive(Deserialize)]
 pub struct Settings {
     pub application: ApplicationSettings,
     pub database: DatabaseSettings,
+    pub email_client: EmailClientSettings,
 }
 
 #[derive(Deserialize)]
@@ -54,6 +57,24 @@ impl DatabaseSettings {
     }
 }
 
+#[derive(Deserialize)]
+pub struct EmailClientSettings {
+    pub base_url: String,
+    sender_email: String,
+    pub authorization_token: Secret<String>,
+    pub timeout_milliseconds: u64,
+}
+
+impl EmailClientSettings {
+    pub fn sender(&self) -> Result<SubscriberEmail, String> {
+        SubscriberEmail::parse(self.sender_email.clone())
+    }
+
+    pub fn timeout(&self) -> Duration {
+        Duration::from_millis(self.timeout_milliseconds)
+    }
+}
+
 pub fn get_configuration() -> Result<Settings, config::ConfigError> {
     let config_dir = std::env::current_dir()
         .map(|dir| dir.join("configuration"))

src/domain/subscriber_email.rs

@@ -1,7 +1,7 @@
 use serde::Deserialize;
 use validator::validate_email;
 
-#[derive(Debug, Deserialize)]
+#[derive(Clone, Debug, Deserialize)]
 pub struct SubscriberEmail(String);
 
 impl SubscriberEmail {