Integrate voso, join_call route for channels.

src/routes/channels/join_call.rs

@@ -0,0 +1,65 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+use crate::util::variables::{USE_VOSO, VOSO_URL, VOSO_MANAGE_TOKEN};
+
+use serde::{Serialize, Deserialize};
+use rocket_contrib::json::JsonValue;
+
+#[derive(Serialize, Deserialize)]
+struct CreateUserResponse {
+    token: String
+}
+
+#[post("/<target>/join_call")]
+pub async fn req(user: User, target: Ref) -> Result<JsonValue> {
+    if !*USE_VOSO {
+        return Err(Error::VosoUnavailable)
+    }
+
+    let target = target.fetch_channel().await?;
+    let perm = permissions::PermissionCalculator::new(&user)
+        .with_channel(&target)
+        .for_channel()
+        .await?;
+    
+    if !perm.get_voice_call() {
+        return Err(Error::MissingPermission)
+    }
+
+    // To join a call:
+    // - Check if the room exists.
+    // - If not, create it.
+    let client = reqwest::Client::new();
+    if let Err(error) = client
+        .get(&format!("{}/room/{}", *VOSO_URL, target.id()))
+        .header(reqwest::header::AUTHORIZATION, VOSO_MANAGE_TOKEN.to_string())
+        .send()
+    .await {
+        if error.status() == Some(reqwest::StatusCode::NOT_FOUND) {
+            if let Err(_) = client
+                .post(&format!("{}/room/{}", *VOSO_URL, target.id()))
+                .header(reqwest::header::AUTHORIZATION, VOSO_MANAGE_TOKEN.to_string())
+                .send()
+            .await {
+                return Err(Error::VosoUnavailable)
+            }
+        } else {
+            return Err(Error::VosoUnavailable)
+        }
+    }
+
+    // Then create a user for the room.
+    if let Ok(response) = client
+        .post(&format!("{}/room/{}/user/{}", *VOSO_URL, target.id(), user.id))
+        .header(reqwest::header::AUTHORIZATION, VOSO_MANAGE_TOKEN.to_string())
+        .send()
+    .await {
+        let res: CreateUserResponse = response.json()
+            .await
+            .map_err(|_| Error::InvalidOperation)?;
+        
+        Ok(json!(res))
+    } else {
+        Err(Error::VosoUnavailable)
+    }
+}

src/routes/channels/mod.rs

@@ -5,6 +5,7 @@ mod fetch_channel;
 mod group_add_member;
 mod group_create;
 mod group_remove_member;
+mod join_call;
 mod message_delete;
 mod message_edit;
 mod message_fetch;
@@ -24,6 +25,7 @@ pub fn routes() -> Vec<Route> {
         message_delete::req,
         group_create::req,
         group_add_member::req,
-        group_remove_member::req
+        group_remove_member::req,
+        join_call::req,
     ]
 }