feat: Implement authentication (#10)

Co-authored-by: kould <2435992353@qq.com>

src/api/user_info.rs

@@ -0,0 +1,52 @@
+use actix_identity::Identity;
+use actix_web::{get, HttpResponse, post, web};
+use serde::{Deserialize, Serialize};
+use crate::api::JsonResponse;
+use crate::AppState;
+use crate::entity::user_info::Model;
+use crate::errors::{AppError, UserError};
+use crate::service::user_info::Query;
+
+pub(crate) fn create_auth_token(user: &Model) -> u64 {
+    use std::{
+        collections::hash_map::DefaultHasher,
+        hash::{Hash, Hasher},
+    };
+
+    let mut hasher = DefaultHasher::new();
+    user.hash(&mut hasher);
+    hasher.finish()
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub(crate) struct LoginParams {
+    pub(crate) email: String,
+    pub(crate) password: String,
+}
+
+#[post("/v1.0/login")]
+async fn login(
+    data: web::Data<AppState>,
+    identity: Identity,
+    input: web::Json<LoginParams>
+) -> Result<HttpResponse, AppError> {
+    match Query::login(&data.conn, &input.email, &input.password).await? {
+        Some(user) => {
+            let token = create_auth_token(&user).to_string();
+
+            identity.remember(token.clone());
+
+            let json_response = JsonResponse {
+                code: 200,
+                err: "".to_owned(),
+                data: token.clone(),
+            };
+
+            Ok(HttpResponse::Ok()
+                .content_type("application/json")
+                .append_header(("X-Auth-Token", token))
+                .body(serde_json::to_string(&json_response)?))
+        }
+        None => Err(UserError::LoginFailed.into())
+    }
+}