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()))
+}

src/structs.rs

@@ -1,6 +1,6 @@
 use std::str::FromStr;
 
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
 use sqlx::{prelude::FromRow, Pool, Postgres};
 use uuid::Uuid;
 use actix_web::HttpResponse;
@@ -8,7 +8,7 @@ use log::error;
 
 use crate::Data;
 
-#[derive(Serialize, Clone)]
+#[derive(Serialize, Deserialize, Clone)]
 pub struct Channel {
     pub uuid: Uuid,
     pub guild_uuid: Uuid,
@@ -32,7 +32,7 @@ impl ChannelPermissionBuilder {
     }
 }
 
-#[derive(Serialize, Clone, FromRow)]
+#[derive(Serialize, Deserialize, Clone, FromRow)]
 pub struct ChannelPermission {
     pub role_uuid: Uuid,
     pub permissions: i32
@@ -155,6 +155,23 @@ impl Channel {
 
         Ok(channel)
     }
+
+    pub async fn fetch_messages(&self, pool: &Pool<Postgres>, amount: i64, offset: i64) -> Result<Vec<Message>, HttpResponse> {
+        let row = sqlx::query_as(&format!("SELECT uuid, user_uuid, message FROM channels WHERE channel_uuid = '{}' ORDER BY uuid LIMIT $1 OFFSET $2", self.uuid))
+            .bind(amount)
+            .bind(offset)
+            .fetch_all(pool)
+            .await;
+
+        if let Err(error) = row {
+            error!("{}", error);
+            return Err(HttpResponse::InternalServerError().finish());
+        }
+
+        let message_builders: Vec<MessageBuilder> = row.unwrap();
+
+        Ok(message_builders.iter().map(|b| b.build()).collect())
+    }
 }
 
 #[derive(Clone, Copy)]
@@ -349,3 +366,30 @@ impl Member {
         })
     }
 }
+
+#[derive(FromRow)]
+struct MessageBuilder {
+    uuid: String,
+    channel_uuid: String,
+    user_uuid: String,
+    message: String,
+}
+
+impl MessageBuilder {
+    fn build(&self) -> Message {
+        Message {
+            uuid: Uuid::from_str(&self.uuid).unwrap(),
+            channel_uuid: Uuid::from_str(&self.channel_uuid).unwrap(),
+            user_uuid: Uuid::from_str(&self.user_uuid).unwrap(),
+            message: self.message.clone(),
+        }
+    }
+}
+
+#[derive(Serialize)]
+pub struct Message {
+    uuid: Uuid,
+    channel_uuid: Uuid,
+    user_uuid: Uuid,
+    message: String,
+}