Fetch messages route.

src/database/guards/reference.rs

@@ -4,7 +4,7 @@ use crate::util::result::{Error, Result};
 use validator::Validate;
 use rocket::http::RawStr;
 use rocket::request::FromParam;
-use mongodb::bson::{doc, from_bson, Bson};
+use mongodb::bson::{Bson, doc, from_bson, from_document};
 use serde::{Deserialize, Serialize, de::DeserializeOwned};
 
 #[derive(Validate, Serialize, Deserialize)]
@@ -34,8 +34,8 @@ impl Ref {
             .ok_or_else(|| Error::UnknownUser)?;
 
         Ok(
-            from_bson::<T>(Bson::Document(doc)).map_err(|_| Error::DatabaseError {
-                operation: "from_bson",
+            from_document::<T>(doc).map_err(|_| Error::DatabaseError {
+                operation: "from_document",
                 with: &collection,
             })?,
         )

src/database/guards/user.rs

@@ -1,6 +1,6 @@
 use crate::database::*;
 
-use mongodb::bson::{doc, from_bson, Bson};
+use mongodb::bson::{Bson, doc, from_bson, from_document};
 use rauth::auth::Session;
 use rocket::http::Status;
 use rocket::request::{self, FromRequest, Outcome, Request};
@@ -22,7 +22,7 @@ impl<'a, 'r> FromRequest<'a, 'r> for User {
             .await
         {
             if let Some(doc) = result {
-                Outcome::Success(from_bson(Bson::Document(doc)).unwrap())
+                Outcome::Success(from_document(doc).unwrap())
             } else {
                 Outcome::Failure((Status::Forbidden, rauth::util::Error::InvalidSession))
             }

src/database/migrations/scripts.rs

@@ -2,7 +2,7 @@ use super::super::{get_collection, get_db};
 
 use crate::rocket::futures::StreamExt;
 use log::info;
-use mongodb::bson::{doc, from_bson, Bson};
+use mongodb::bson::{Bson, doc, from_bson, from_document};
 use mongodb::options::FindOptions;
 use serde::{Deserialize, Serialize};
 
@@ -23,7 +23,7 @@ pub async fn migrate_database() {
 
     if let Some(doc) = data {
         let info: MigrationInfo =
-            from_bson(Bson::Document(doc)).expect("Failed to read migration information.");
+            from_document(doc).expect("Failed to read migration information.");
 
         let revision = run_migrations(info.revision).await;
 

src/notifications/payload.rs

@@ -4,7 +4,7 @@ use crate::{
     util::result::{Error, Result},
 };
 use futures::StreamExt;
-use mongodb::{bson::{Bson, doc, from_bson}, options::FindOptions};
+use mongodb::{bson::{Bson, doc, from_bson, from_document}, options::FindOptions};
 
 use super::websocket::is_online;
 
@@ -37,8 +37,8 @@ pub async fn generate_ready(mut user: User) -> Result<ClientboundNotification> {
         while let Some(result) = cursor.next().await {
             if let Ok(doc) = result {
                 let mut user: User =
-                    from_bson(Bson::Document(doc)).map_err(|_| Error::DatabaseError {
-                        operation: "from_bson",
+                    from_document(doc).map_err(|_| Error::DatabaseError {
+                        operation: "from_document",
                         with: "user",
                     })?;
 
@@ -89,9 +89,9 @@ pub async fn generate_ready(mut user: User) -> Result<ClientboundNotification> {
     while let Some(result) = cursor.next().await {
         if let Ok(doc) = result {
             channels.push(
-                from_bson(Bson::Document(doc))
+                from_document(doc)
                     .map_err(|_| Error::DatabaseError {
-                        operation: "from_bson",
+                        operation: "from_document",
                         with: "channel",
                     })?
             );

src/routes/channels/message_fetch.rs

@@ -0,0 +1,67 @@
+use crate::database::*;
+use crate::util::result::{Error, Result};
+
+use futures::StreamExt;
+use validator::Validate;
+use rocket::request::Form;
+use serde::{Serialize, Deserialize};
+use rocket_contrib::json::JsonValue;
+use mongodb::{bson::{doc, from_document}, options::FindOptions};
+
+#[derive(Validate, Serialize, Deserialize, FromForm)]
+pub struct Options {
+    #[validate(range(min = 1, max = 100))]
+    limit: Option<i64>,
+    #[validate(length(min = 26, max = 26))]
+    before: Option<String>,
+    #[validate(length(min = 26, max = 26))]
+    after: Option<String>,
+}
+
+#[get("/<target>/messages?<options..>")]
+pub async fn req(user: User, target: Ref, options: Form<Options>) -> Result<JsonValue> {
+    options.validate()
+        .map_err(|error| Error::FailedValidation { error })?;
+
+    let target = target.fetch_channel().await?;
+
+    let perm = permissions::channel::calculate(&user, &target).await;
+    if !perm.get_view() {
+        Err(Error::LabelMe)?
+    }
+
+    let mut query = doc! { "channel": target.id() };
+
+    if let Some(before) = &options.before {
+        query.insert("_id", doc! { "$lt": before });
+    }
+
+    if let Some(after) = &options.after {
+        query.insert("_id", doc! { "$gt": after });
+    }
+
+    let mut cursor = get_collection("messages")
+        .find(
+            query,
+            FindOptions::builder()
+                .limit(options.limit.unwrap_or(50))
+                .sort(doc! {
+                    "_id": -1
+                })
+                .build(),
+        )
+        .await
+        .map_err(|_| Error::DatabaseError { operation: "find", with: "messages" })?;
+    
+    let mut messages = vec![];
+    while let Some(result) = cursor.next().await {
+        if let Ok(doc) = result {
+            messages.push(
+                from_document::<Message>(doc)
+                    .map_err(|_| Error::DatabaseError { operation: "from_document", with: "message" })?
+            );
+        }
+    }
+
+    Ok(json!(messages))
+}

src/routes/channels/mod.rs

@@ -3,11 +3,13 @@ use rocket::Route;
 mod fetch_channel;
 mod delete_channel;
 mod message_send;
+mod message_fetch;
 
 pub fn routes() -> Vec<Route> {
     routes![
         fetch_channel::req,
         delete_channel::req,
-        message_send::req
+        message_send::req,
+        message_fetch::req
     ]
 }