[BE] Get session cookie from online classroom

backend/Cargo.lock

@@ -237,6 +237,17 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28c122c3980598d243d63d9a704629a2d748d101f278052ff068be5a4423ab6f"
 
+[[package]]
+name = "cookie"
+version = "0.16.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e859cd57d0710d9e06c381b550c06e76992472a8c6d527aecd2fc673dcc231fb"
+dependencies = [
+ "percent-encoding",
+ "time 0.3.27",
+ "version_check",
+]
+
 [[package]]
 name = "cookie"
 version = "0.17.0"
@@ -248,6 +259,23 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "cookie_store"
+version = "0.16.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d606d0fba62e13cf04db20536c05cb7f13673c161cb47a47a82b9b9e7d3f1daa"
+dependencies = [
+ "cookie 0.16.2",
+ "idna 0.2.3",
+ "log",
+ "publicsuffix",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "time 0.3.27",
+ "url",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.9.3"
@@ -828,6 +856,27 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "idna"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "418a0a6fab821475f634efe3ccc45c013f742efe03d853e8d3355d5cb850ecf8"
+dependencies = [
+ "matches",
+ "unicode-bidi",
+ "unicode-normalization",
+]
+
+[[package]]
+name = "idna"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e14ddfc70884202db2244c223200c204c2bda1bc6e0998d11b5e024d657209e6"
+dependencies = [
+ "unicode-bidi",
+ "unicode-normalization",
+]
+
 [[package]]
 name = "idna"
 version = "0.4.0"
@@ -984,6 +1033,12 @@ dependencies = [
  "regex-automata 0.1.10",
 ]
 
+[[package]]
+name = "matches"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2532096657941c2fea9c289d370a250971c689d4f143798ff67113ec042024a5"
+
 [[package]]
 name = "md-5"
 version = "0.10.5"
@@ -1366,6 +1421,22 @@ dependencies = [
  "yansi 1.0.0-rc.1",
 ]
 
+[[package]]
+name = "psl-types"
+version = "2.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33cb294fe86a74cbcf50d4445b37da762029549ebeea341421c7c70370f86cac"
+
+[[package]]
+name = "publicsuffix"
+version = "2.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96a8c1bda5ae1af7f99a2962e49df150414a43d62404644d98dd5c3a93d07457"
+dependencies = [
+ "idna 0.3.0",
+ "psl-types",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.33"
@@ -1486,6 +1557,8 @@ checksum = "3e9ad3fe7488d7e34558a2033d45a0c90b72d97b4f80705666fea71472e2e6a1"
 dependencies = [
  "base64",
  "bytes",
+ "cookie 0.16.2",
+ "cookie_store",
  "encoding_rs",
  "futures-core",
  "futures-util",
@@ -1615,7 +1688,7 @@ version = "0.5.0-rc.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "936012c99162a03a67f37f9836d5f938f662e26f2717809761a9ac46432090f4"
 dependencies = [
- "cookie",
+ "cookie 0.17.0",
  "either",
  "futures",
  "http",
@@ -2552,7 +2625,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "50bff7831e19200a85b17131d085c25d7811bc4e186efdaf54bbd132994a88cb"
 dependencies = [
  "form_urlencoded",
- "idna",
+ "idna 0.4.0",
  "percent-encoding",
 ]
 

backend/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-reqwest = { version = "0.11", features = ["json"] }
+reqwest = { version = "0.11", features = ["json", "cookies"] }
 rocket = { version = "=0.5.0-rc.3" , features = ["json", "msgpack", "uuid"] }
 sqlx = { version = "0.7.1", features = [ "runtime-tokio", "tls-rustls", "mysql", "macros", "chrono" ] }
 once_cell = "1.18.0"

backend/src/main.rs

@@ -50,6 +50,10 @@ async fn rocket() -> _ {
             controller::register::get_by_dni,
             controller::register::delete,
             controller::custom_label::get_all,
+            //
+            // Online classroom routes
+            //
+            online_classroom::connection,
         ],
     )
 }

backend/src/online_classroom/mod.rs

@@ -1,6 +1,85 @@
+use once_cell::sync::OnceCell;
 
-pub fn get_cookie() {
+use reqwest::Client;
+use rocket::{http::Status, serde::json::Json};
+use serde::{Deserialize, Serialize};
 
+static SESSION_COOKIE: OnceCell<String> = OnceCell::new();
+
+#[derive(Debug, Serialize, Deserialize)]
+pub enum ConnectionResult {
+    Ok(),
+    Error(ConnectionError),
+}
+#[derive(Debug, Serialize, Deserialize)]
+pub struct ConnectionError {
+    reason: String,
+}
+fn new_error(reason: String) -> ConnectionResult {
+    ConnectionResult::Error(ConnectionError { reason })
 }
 
+/// Tries to connect to the online classroom, and get a session cookie
+#[get("/classroom/connect")]
+pub async fn connection() -> (Status, Json<ConnectionResult>) {
+    // Get session cookie
+    let _cookie = match get_cookie().await {
+        Ok(cookie) => cookie,
+        Err(reason) => return (Status::InternalServerError, Json(new_error(reason))),
+    };
 
+    (Status::Ok, Json(ConnectionResult::Ok()))
+}
+
+async fn get_cookie<'a>() -> Result<&'a String, String> {
+    match SESSION_COOKIE.get() {
+        Some(cookie) => Ok(cookie),
+        None => {
+            // Try to create cookie
+            let _ = create_cookie().await?;
+
+            // Try to get cookie again
+            match SESSION_COOKIE.get() {
+                Some(cookie) => Ok(cookie),
+                None => Err("Error getting session cookie".into()),
+            }
+        }
+    }
+}
+
+/// Tries to connect to the online classroom, and get a session cookie.
+/// Stores the session coookie in a global static variable.
+pub async fn create_cookie() -> Result<(), String> {
+    let clasroom_url = std::env::var("CLASSROOM_URL").expect("CLASSROOM_URL env var is not set!");
+    let clasroom_user =
+        std::env::var("CLASSROOM_USER").expect("CLASSROOM_USER env var is not set!");
+    let clasroom_password =
+        std::env::var("CLASSROOM_PASSWORD").expect("CLASSROOM_PASSWORD env var is not set!");
+
+    let params = [
+        ("login", clasroom_user),
+        ("password", clasroom_password),
+        ("submitAuth", "".into()),
+        ("_qf__formLogin", "".into()),
+    ];
+    let client = Client::new();
+    let result = client
+        .post(format!("{}/index.php", clasroom_url))
+        .form(&params)
+        .send()
+        .await;
+
+    match result {
+        Ok(response) => {
+            let Some(session_cookie) = response.cookies().find(|c| c.name() == "ch_sid") else {
+                return Err("Response succeeded, but no session cookie was foun".into());
+            };
+
+            match SESSION_COOKIE.set(session_cookie.value().into()) {
+                Ok(_) => Ok(()),
+                Err(error) => Err(format!("Error setting session cookie: {:?}", error)),
+            }
+        }
+        Err(error) => Err(format!("Error connecting to online classroom: {:?}", error)),
+    }
+}

frontend/src/OnlineClassroom/ConnectionStatus.tsx

@@ -0,0 +1,58 @@
+import { Match, Switch, createSignal, onMount } from "solid-js";
+
+type ConnectionStatus = "connected" | "connecting" | "disconnected" | "error";
+export function ClassroomConection() {
+    const [status, setStatus] = createSignal<ConnectionStatus>("disconnected");
+
+    const connectToRemote = () => {
+        setStatus("connecting");
+
+        fetch(`${import.meta.env.VITE_BACKEND_URL}/api/classroom/connect`)
+            .then((response) => {
+                if (response.ok) {
+                    setStatus("connected");
+                } else {
+                    response.json().then((json) => {
+                        console.error(json);
+                        setStatus("error");
+                    });
+                }
+            })
+            .catch((err) => {
+                console.error(err);
+                setStatus("error");
+            });
+
+        // setTimeout(() => setStatus("disconnected"), 5000);
+    };
+
+    onMount(connectToRemote);
+
+    return (
+        <div class="bg-c-surface-variant text-c-on-surface-variant rounded-md p-2 mt-4">
+            Conexión al aula virtual:&nbsp;
+            <Switch fallback={"Desconectado"}>
+                <Match when={status() === "connected"}>
+                    <span class="bg-c-success text-c-on-success px-2 rounded select-none font-mono">
+                        Conectado
+                    </span>
+                </Match>
+                <Match when={status() === "connecting"}>
+                    <span class="font-mono" style={{color: "orange"}}>
+                        Conectando...
+                    </span>
+                </Match>
+                <Match when={status() === "error"}>
+                    <span class="bg-c-error text-c-on-error px-2 rounded font-mono">
+                        Error
+                    </span>
+                </Match>
+                <Match when={status() === "disconnected"}>
+                    <span class="bg-c-error-container text-c-on-error-container px-2 rounded font-mono">
+                        Desconectado
+                    </span>
+                </Match>
+            </Switch>
+        </div>
+    );
+}

frontend/src/OnlineClassroom/index.tsx

@@ -1,6 +1,7 @@
 import { Show, createSignal } from "solid-js";
 import { Search } from "../certs/Search";
 import { Person } from "../types/Person";
+import { ClassroomConection } from "./ConnectionStatus";
 
 export function OnlineClassroom() {
     const [person, setPerson] = createSignal<Person | null>(null);
@@ -18,13 +19,7 @@ export function OnlineClassroom() {
     );
 }
 
-function ClassroomConection() {
+
-    return (
-        <div>
-            Connection status
-        </div>
-    );
-}
 
 function ClassroomUsers(props: {person: Person}) {
     return (

frontend/src/colors.css

@@ -17,6 +17,9 @@
     --c-green-outline: #8d9387;
     --c-green-surface-variant: #43483f;
     --c-green-on-surface-variant: #c3c8bc;
+
+    --c-green-success: #adc6ff;
+    --c-green-on-success: #002e69;
 }
 @media (prefers-color-scheme: light) {
     :root {