From a076aafb1643159fe2256b02e97fe7822612e210 Mon Sep 17 00:00:00 2001
From: yasushi <ysshski@gmail.com>
Date: Wed, 17 Apr 2019 12:56:18 -0400
Subject: [PATCH] actuall main.rs

---
 src/main.rs | 171 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 169 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index e7a11a9..d3333ac 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,170 @@
-fn main() {
-    println!("Hello, world!");
+extern crate json;
+#[macro_use]
+extern crate actix_web;
+
+use serde_derive::{Deserialize, Serialize};
+
+use actix_web::{
+    web, App, Error, HttpResponse, HttpServer, Result as ActixResult};
+use actix_web::http::{header, StatusCode};
+use actix_web::middleware::{cors::Cors, Logger};
+use futures::{Future, Stream};
+use serde_json::{json, Map, Value, Error as JSONError};
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use sha256::sha256::{format_hash, hash};
+
+type JSONState = Arc<Mutex<HashMap<String, Value>>>;
+type JSONObject = Map<String, Value>;
+
+#[get("/")]
+fn index() -> ActixResult<HttpResponse> {
+    Ok(HttpResponse::build(StatusCode::MOVED_PERMANENTLY)
+       .header(header::LOCATION,"http://cityscope.media.mit.edu/CS_CityIO_Frontend/")
+       .finish())
+}
+
+/// gets table data by asking the name of the table
+fn get_table(
+    name: web::Path<String>,
+    state: web::Data<JSONState>,
+    pl: web::Payload,
+) -> impl Future<Item = HttpResponse, Error = Error> {
+    pl.concat2().from_err().and_then(move |_| {
+        let name = format!("{}", *name);
+        let map = state.lock().unwrap();
+        let mut data: String;
+
+        match map.get(&name) {
+            Some(v) => data = v.to_string(),
+            None => data = json!({"status": "table not found"}).to_string(),
+        };
+
+        Ok(HttpResponse::Ok()
+            .content_type("application/json")
+            .body(data.into_bytes()))
+    })
+}
+
+#[derive(Serialize, Deserialize)]
+struct TableList(Vec<String>);
+
+#[derive(Serialize, Deserialize)]
+struct Meta {
+    id: String,
+    timestamp: u64,
+    apiv: String,
+}
+
+impl Meta {
+    fn new(dump: &str) -> Meta {
+        let id = format_hash(&hash(&dump));
+        let now = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap()
+            .as_secs();
+        let apiv = String::from("2.0");
+
+        Meta {
+            id: id,
+            timestamp: now,
+            apiv: apiv,
+        }
+    }
+}
+
+/// gets table data by asking the name of the table
+fn list_tables(
+    state: web::Data<JSONState>,
+    pl: web::Payload,
+) -> impl Future<Item = HttpResponse, Error = Error> {
+    pl.concat2().from_err().and_then(move |_| {
+        let tables = state.lock().unwrap();
+
+        let mut names: Vec<String> = Vec::new();
+
+        for key in tables.keys() {
+            names.push(format!("https://cityio.media.mit.edu/api/table/{}", &key.to_string()));
+        }
+
+        let data = json!(TableList(names)).to_string();
+        Ok(HttpResponse::Ok()
+            .content_type("application/json")
+            .body(data.into_bytes()))
+    })
+}
+
+/// sets the table to /table/{name}
+fn set_table(
+    name: web::Path<String>,
+    state: web::Data<JSONState>,
+    pl: web::Payload,
+) -> impl Future<Item = HttpResponse, Error = Error> {
+    pl.concat2().from_err().and_then(move |body| {
+        // body is loaded, now we can deserialize json-rust
+        let result: Result<JSONObject, JSONError> =
+            serde_json::from_slice(&body); // return Result
+
+        let name = format!("{}", *name);
+
+        let mut injson: JSONObject = match result {
+            Ok(v) => v,
+            Err(_e) => {
+                let mut er = JSONObject::new();
+                er.insert("status".to_string(), json!("error, please post a Json **Object**"));
+                er
+            }
+        };
+
+        let mut map = state.lock().unwrap();
+        let meta = Meta::new(&json!(injson).to_string());
+        injson.insert(String::from("meta"), json!(meta));
+        map.insert(name, json!(injson));
+
+        let status_success = json!({
+            "status": "ok",
+        });
+
+        Ok(HttpResponse::Ok()
+            .content_type("application/json")
+            .body(status_success.to_string().into_bytes()))
+    })
+}
+
+fn main() -> std::io::Result<()> {
+    std::env::set_var("RUST_LOG", "actix_web=info");
+    env_logger::init();
+
+    let hashmap: JSONState = Arc::new(Mutex::new(HashMap::new()));
+
+    HttpServer::new(move || {
+        App::new()
+            // enable logger
+            .data(hashmap.clone())
+            .wrap(Logger::default())
+            .wrap(
+                Cors::new()
+                    .allowed_methods(vec!["GET", "POST"])
+                    .send_wildcard()
+                    .allowed_headers(vec![
+                        header::AUTHORIZATION,
+                        header::ACCEPT,
+                        header::CONTENT_TYPE,
+                    ]),
+            )
+            .service(
+                web::resource("/api/table/{name}")
+                    .route(web::get().to_async(get_table))
+            )
+            .service(
+                web::resource("/api/table/update/{name}")    
+                    .route(web::post().to_async(set_table))
+            )
+            .service(web::resource("/api/tables/list").route(web::get().to_async(list_tables)))
+            .service(index)
+    })
+    .bind("127.0.0.1:8080")?
+    .run()
 }