Initial Implementation of EmailService and Ignores EnvFile

.env

@@ -1,4 +0,0 @@
-HOST=localhost
-PORT=8500
-
-AUTH_URL=http://localhost:8070

.gitignore

@@ -2,3 +2,5 @@
 
 .vscode/
 .idea/
+
+.env

Cargo.lock

@@ -236,6 +236,16 @@ dependencies = [
  "windows-targets 0.52.3",
 ]
 
+[[package]]
+name = "chumsky"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8eebd66744a15ded14960ab4ccdbfb51ad3b81f51f3f04a80adac98c985396c9"
+dependencies = [
+ "hashbrown 0.14.3",
+ "stacker",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.9.4"
@@ -367,6 +377,22 @@ version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77c90badedccf4105eca100756a0b1289e191f6fcbdadd3cee1d2f614f97da8f"
 
+[[package]]
+name = "email-encoding"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbfb21b9878cf7a348dcb8559109aabc0ec40d69924bd706fa5149846c4fef75"
+dependencies = [
+ "base64",
+ "memchr",
+]
+
+[[package]]
+name = "email_address"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2153bd83ebc09db15bcbdc3e2194d901804952e3dc96967e1cd3b0c5c32d112"
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.33"
@@ -443,6 +469,12 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dfc6580bb841c5a68e9ef15c77ccc837b40a7504914d52e47b8b0e9bbda25a1d"
 
+[[package]]
+name = "futures-io"
+version = "0.3.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a44623e20b9681a318efdd71c299b6b222ed6f231972bfe2f224ebad6311f0c1"
+
 [[package]]
 name = "futures-sink"
 version = "0.3.30"
@@ -462,9 +494,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d6401deb83407ab3da39eba7e33987a73c3df0c82b4bb5813ee871c19c41d48"
 dependencies = [
  "futures-core",
+ "futures-io",
  "futures-task",
+ "memchr",
  "pin-project-lite",
  "pin-utils",
+ "slab",
 ]
 
 [[package]]
@@ -477,6 +512,17 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "gimli"
 version = "0.28.1"
@@ -573,6 +619,17 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
+[[package]]
+name = "hostname"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c731c3e10504cc8ed35cfe2f1db4c9274c3d35fa486e3b31df46f068ef3e867"
+dependencies = [
+ "libc",
+ "match_cfg",
+ "winapi",
+]
+
 [[package]]
 name = "http"
 version = "0.2.11"
@@ -811,6 +868,36 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "lettre"
+version = "0.11.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "357ff5edb6d8326473a64c82cf41ddf78ab116f89668c50c4fac1b321e5e80f4"
+dependencies = [
+ "async-trait",
+ "base64",
+ "chumsky",
+ "email-encoding",
+ "email_address",
+ "fastrand",
+ "futures-io",
+ "futures-util",
+ "hostname",
+ "httpdate",
+ "idna",
+ "mime",
+ "nom",
+ "percent-encoding",
+ "quoted_printable",
+ "rustls",
+ "rustls-pemfile 2.1.0",
+ "socket2",
+ "tokio",
+ "tokio-rustls",
+ "url",
+ "webpki-roots",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.153"
@@ -823,12 +910,28 @@ version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
 
+[[package]]
+name = "lock_api"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c168f8615b12bc01f9c17e2eb0cc07dcae1940121185446edc3744920e8ef45"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
 
+[[package]]
+name = "match_cfg"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffbee8634e0d45d258acb448e7eaab3fce7a0a467395d4d9f228e3c1f01fb2e4"
+
 [[package]]
 name = "matchit"
 version = "0.7.3"
@@ -851,6 +954,7 @@ dependencies = [
  "dotenv",
  "headers",
  "http 1.0.0",
+ "lettre",
  "log",
  "reqwest",
  "serde",
@@ -866,6 +970,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.7.2"
@@ -904,6 +1014,16 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.1.0"
@@ -988,6 +1108,29 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c42a9226546d68acdd9c0a280d17ce19bfe27a46bf68784e4066115788d008e"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-targets 0.48.5",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.1"
@@ -1047,6 +1190,15 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "psm"
+version = "0.1.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5787f7cda34e3033a72192c018bc5883100330f362ef279a8cbccfce8bb4e874"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.35"
@@ -1056,6 +1208,21 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "quoted_printable"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79ec282e887b434b68c18fe5c121d38e72a5cf35119b59e54ec5b992ea9c8eb0"
+
+[[package]]
+name = "redox_syscall"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa"
+dependencies = [
+ "bitflags 1.3.2",
+]
+
 [[package]]
 name = "reqwest"
 version = "0.11.24"
@@ -1080,7 +1247,7 @@ dependencies = [
  "once_cell",
  "percent-encoding",
  "pin-project-lite",
- "rustls-pemfile",
+ "rustls-pemfile 1.0.4",
  "serde",
  "serde_json",
  "serde_urlencoded",
@@ -1096,6 +1263,21 @@ dependencies = [
  "winreg",
 ]
 
+[[package]]
+name = "ring"
+version = "0.17.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c17fa4cb658e3583423e915b9f3acc01cceaee1860e33d59ebae66adc3a2dc0d"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "getrandom",
+ "libc",
+ "spin",
+ "untrusted",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.23"
@@ -1115,6 +1297,20 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.22.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e87c9956bd9807afa1f77e0f7594af32566e830e088a5576d27c5b6f30f49d41"
+dependencies = [
+ "log",
+ "ring",
+ "rustls-pki-types",
+ "rustls-webpki",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "rustls-pemfile"
 version = "1.0.4"
@@ -1124,6 +1320,33 @@ dependencies = [
  "base64",
 ]
 
+[[package]]
+name = "rustls-pemfile"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c333bb734fcdedcea57de1602543590f545f127dc8b533324318fd492c5c70b"
+dependencies = [
+ "base64",
+ "rustls-pki-types",
+]
+
+[[package]]
+name = "rustls-pki-types"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "048a63e5b3ac996d78d402940b5fa47973d2d080c6c6fffa1d0f19c4445310b7"
+
+[[package]]
+name = "rustls-webpki"
+version = "0.102.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "faaa0a62740bedb9b2ef5afa303da42764c012f743917351dc9a237ea1663610"
+dependencies = [
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.14"
@@ -1145,6 +1368,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
 [[package]]
 name = "security-framework"
 version = "2.9.2"
@@ -1262,6 +1491,15 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8229b473baa5980ac72ef434c4415e70c4b5e71b423043adb4ba059f89c99a1"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -1287,12 +1525,37 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "spin"
+version = "0.9.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
+
+[[package]]
+name = "stacker"
+version = "0.1.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c886bd4480155fd3ef527d45e9ac8dd7118a898a46530b7b94c3e21866259fce"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "libc",
+ "psm",
+ "winapi",
+]
+
 [[package]]
 name = "strsim"
 version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
+[[package]]
+name = "subtle"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
+
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -1431,7 +1694,9 @@ dependencies = [
  "libc",
  "mio",
  "num_cpus",
+ "parking_lot",
  "pin-project-lite",
+ "signal-hook-registry",
  "socket2",
  "tokio-macros",
  "windows-sys 0.48.0",
@@ -1458,6 +1723,17 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-rustls"
+version = "0.25.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "775e0c0f0adb3a2f22a00c4745d728b479985fc15ee7ca6a2608388c5569860f"
+dependencies = [
+ "rustls",
+ "rustls-pki-types",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-util"
 version = "0.7.10"
@@ -1553,6 +1829,12 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "untrusted"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
+
 [[package]]
 name = "url"
 version = "2.5.0"
@@ -1673,6 +1955,37 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "webpki-roots"
+version = "0.26.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3de34ae270483955a94f4b21bdaaeb83d508bb84a01435f393818edb0012009"
+dependencies = [
+ "rustls-pki-types",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-core"
 version = "0.52.0"
@@ -1843,3 +2156,9 @@ dependencies = [
  "quote",
  "syn 2.0.50",
 ]
+
+[[package]]
+name = "zeroize"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"

Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 
 [dependencies]
 axum = "0.7.4"
-tokio = { version = "1.0.0", features = ["rt", "rt-multi-thread", "macros"] }
+tokio = { version = "1.0.0", features = ["full"] }
 uuid = "1.7.0"
 serde = { version = "1.0.197", features = ["derive"] }
 serde_with = "3.6.1"
@@ -19,3 +19,4 @@ serde_json = "1.0.114"
 cached = "0.49.2"
 dotenv = "0.15.0"
 log = "0.4.20"
+lettre = { version = "0.11.4", default-features = false, features = ["smtp-transport", "tokio1-rustls-tls", "hostname", "builder"] }

src/config/config_email.rs

@@ -0,0 +1,25 @@
+use cached::proc_macro::cached;
+use std::env;
+
+#[derive(Clone)]
+pub struct ConfigEmail {
+    pub smtp_server: String,
+    pub smtp_port: u16,
+    pub smtp_username: String,
+    pub smtp_password: String,
+}
+
+#[cached]
+pub fn get_config_email() -> ConfigEmail {
+    let server = env::var("SMTP_SERVER").expect("SMTP_SERVER must be set");
+    let port = env::var("SMTP_PORT").expect("SMTP_PORT must be set");
+    let username = env::var("SMTP_USERNAME").expect("SMTP_USERNAME must be set");
+    let password = env::var("SMTP_PASSWORD").expect("SMTP_PASSWORD must be set");
+
+    ConfigEmail{
+        smtp_server: server,
+        smtp_port: port.parse::<u16>().unwrap(),
+        smtp_username: username,
+        smtp_password: password,
+    }
+}

src/config/mod.rs

@@ -1,2 +1,3 @@
 pub mod config_auth;
 pub mod config_server;
+pub mod config_email;

src/route.rs

@@ -1,4 +1,4 @@
-use crate::config::config_auth;
+use crate::config::{config_auth, config_email};
 use crate::handler::health::health_check;
 use crate::handler::message::send_message;
 use crate::middleware::auth_middleware::auth_middleware;
@@ -16,7 +16,7 @@ fn configure_message_endpoint(router: Router) -> Router {
         .route("/message", post(send_message))
         .layer(middleware::from_fn(auth_middleware))
         .layer(Extension(AuthService::new(config_auth::get_config_auth())))
-        .layer(Extension(EmailService::new()))
+        .layer(Extension(EmailService::new(config_email::get_config_email())))
 }
 
 fn configure_health_endpoint(router: Router) -> Router {

src/service/email_service.rs

@@ -1,8 +1,41 @@
+use lettre::{
+    transport::smtp::authentication::Credentials, AsyncSmtpTransport, AsyncTransport, Message,
+    Tokio1Executor,
+};
+use crate::config::config_email::ConfigEmail;
+
+
 #[derive(Clone)]
-pub struct EmailService {}
+pub struct EmailService {
+    mailer: AsyncSmtpTransport<Tokio1Executor>
+}
 
 impl EmailService {
-    pub fn new() -> Self {
-        EmailService {}
+    pub fn new(config_email: ConfigEmail) -> Self {
+        EmailService {
+            mailer: AsyncSmtpTransport::<Tokio1Executor>::relay(&config_email.smtp_server)
+                .unwrap()
+                .credentials(Credentials::new(config_email.smtp_username, config_email.smtp_password))
+                .port(config_email.smtp_port)
+                .build()
+        }
+    }
+
+    async fn send_email_smtp(
+        &self,
+        from: &str,
+        to: &str,
+        subject: &str,
+        body: String,
+    ) -> Result<(), Box<dyn std::error::Error>> {
+        let email = Message::builder()
+            .from(from.parse()?)
+            .to(to.parse()?)
+            .subject(subject)
+            .body(body.to_string())?;
+
+        self.mailer.send(email).await?;
+
+        Ok(())
     }
 }