Add edit message route.

src/routes/channels/message_edit.rs

@@ -0,0 +1,58 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use chrono::Utc;
+use mongodb::bson::{Bson, DateTime, doc};
+use rocket_contrib::json::Json;
+use serde::{Deserialize, Serialize};
+use validator::Validate;
+
+#[derive(Validate, Serialize, Deserialize)]
+pub struct Data {
+    #[validate(length(min = 1, max = 2000))]
+    content: String,
+}
+
+#[patch("/<target>/messages/<msg>", data = "<edit>")]
+pub async fn req(user: User, target: Ref, msg: Ref, edit: Json<Data>) -> Result<()> {
+    edit.validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    let channel = target.fetch_channel().await?;
+
+    let perm = permissions::channel::calculate(&user, &channel).await;
+    if !perm.get_view() {
+        Err(Error::LabelMe)?
+    }
+
+    let mut message = msg.fetch_message().await?;
+    if message.author != user.id {
+        Err(Error::CannotEditMessage)?
+    }
+
+    let edited = Utc::now();
+    get_collection("messages")
+        .update_one(
+            doc! {
+                "_id": &message.id
+            },
+            doc! {
+                "$set": {
+                    "content": &edit.content,
+                    "edited": Bson::DateTime(edited)
+                }
+            },
+            None,
+        )
+        .await
+        .map_err(|_| Error::DatabaseError {
+            operation: "update_one",
+            with: "message",
+        })?;
+
+    message.content = edit.content.clone();
+    message.edited = Some(DateTime(edited));
+    message.publish_edit().await?;
+
+    Ok(())
+}

src/routes/channels/mod.rs

@@ -2,6 +2,7 @@ use rocket::Route;
 
 mod delete_channel;
 mod fetch_channel;
+mod message_edit;
 mod message_fetch;
 mod message_query;
 mod message_send;
@@ -12,6 +13,7 @@ pub fn routes() -> Vec<Route> {
         delete_channel::req,
         message_send::req,
         message_query::req,
-        message_fetch::req
+        message_fetch::req,
+        message_edit::req
     ]
 }