feat: implement message fetching

src/api/v1/servers/uuid/channels/uuid/messages.rs

@@ -0,0 +1,73 @@
+use actix_web::{get, web, Error, HttpRequest, HttpResponse};
+use serde::Deserialize;
+use crate::{api::v1::auth::check_access_token, structs::{Channel, Member}, utils::get_auth_header, Data};
+use ::uuid::Uuid;
+use log::error;
+
+#[derive(Deserialize)]
+struct MessageRequest {
+    amount: i64,
+    offset: i64,
+}
+
+#[get("{uuid}/channels/{channel_uuid}/messages")]
+pub async fn res(req: HttpRequest, path: web::Path<(Uuid, Uuid)>, message_request: web::Json<MessageRequest>, data: web::Data<Data>) -> Result<HttpResponse, Error> {
+    let headers = req.headers();
+
+    let auth_header = get_auth_header(headers);
+
+    if let Err(error) = auth_header {
+        return Ok(error)
+    }
+
+    let (guild_uuid, channel_uuid) = path.into_inner();
+
+    let authorized = check_access_token(auth_header.unwrap(), &data.pool).await;
+
+    if let Err(error) = authorized {
+        return Ok(error)
+    }
+
+    let uuid = authorized.unwrap();
+
+    let member = Member::fetch_one(&data.pool, uuid, guild_uuid).await;
+
+    if let Err(error) = member {
+        return Ok(error);
+    }
+
+    let cache_result = data.get_cache_key(format!("{}", channel_uuid)).await;
+
+    let mut channel_raw: Option<Channel> = None;
+
+    if let Ok(cache_hit) = cache_result {
+        channel_raw = Some(serde_json::from_str(&cache_hit).unwrap())
+    }
+
+    if channel_raw.is_none() {
+        let channel_result = Channel::fetch_one(&data.pool, guild_uuid, channel_uuid).await;
+
+        if let Err(error) = channel_result {
+            return Ok(error)
+        }
+    
+        channel_raw = Some(channel_result.unwrap());
+    
+        let cache_result = data.set_cache_key(format!("{}", channel_uuid), channel_raw.clone().unwrap(), 60).await;
+    
+        if let Err(error) = cache_result {
+            error!("{}", error);
+            return Ok(HttpResponse::InternalServerError().finish());
+        }
+    }
+
+    let channel = channel_raw.unwrap();
+
+    let messages = channel.fetch_messages(&data.pool, message_request.amount, message_request.offset).await;
+
+    if let Err(error) = messages {
+        return Ok(error)
+    }
+
+    Ok(HttpResponse::Ok().json(messages.unwrap()))
+}