New perm concept, reference, and adding routes.

src/routes/users/fetch_dms.rs

@@ -0,0 +1,42 @@
+use crate::database::entities::{Channel, User};
+use mongodb::bson::{Bson, doc, from_bson};
+use crate::util::result::{Error, Result};
+use crate::database::get_collection;
+use rocket_contrib::json::JsonValue;
+use futures::StreamExt;
+
+#[get("/dms")]
+pub async fn req(user: User) -> Result<JsonValue> {
+    let mut cursor = get_collection("channels")
+        .find(
+            doc! {
+                "$or": [
+                    {
+                        "type": "DirectMessage",
+                        "active": true
+                    },
+                    {
+                        "type": "Group"
+                    }
+                ],
+                "recipients": user.id
+            },
+            None
+        )
+        .await
+        .map_err(|_| Error::DatabaseError { operation: "find", with: "channels" })?;
+    
+    let mut channels: Vec<Channel> = vec![];
+    while let Some(result) = cursor.next().await {
+        if let Ok(doc) = result {
+            channels.push(
+                from_bson(Bson::Document(doc))
+                    .map_err(|_| Error::DatabaseError { operation: "from_bson", with: "channel" })?
+            );
+        }
+    }
+
+    Ok(json!(
+        channels
+    ))
+}