begin implementing tmp file struct for better file management

src/bot/bot.rs

@@ -1,12 +1,14 @@
 use anyhow;
 use rust_i18n::t;
-use url::Url;
 use std::str::{self, FromStr};
 use std::time::Duration;
 use teloxide::dispatching::{dialogue, dialogue::InMemStorage, UpdateHandler};
-use teloxide::types::{InputFile, InputMediaVideo, Me, MessageKind, MessageNewChatMembers, UpdateKind};
+use teloxide::types::{
+    InputFile, InputMediaVideo, Me, MessageKind, MessageNewChatMembers, UpdateKind,
+};
 use teloxide::{prelude::*, update_listeners::Polling, utils::command::BotCommands};
 use tracing::{event, Level};
+use url::Url;
 
 use super::start::handle_new_chat_member;
 use super::types::*;
@@ -25,8 +27,8 @@ use super::start::{cmd_start, handle_my_chat_member};
 pub async fn bot_main(db: DbPool) -> anyhow::Result<()> {
     event!(Level::INFO, "start");
 
-    let bot = Bot::new(unwrap_env("BOT_TOKEN"))
-        .set_api_url(Url::from_str(&unwrap_env("BOT_API_URL"))?);
+    let bot =
+        Bot::new(unwrap_env("BOT_TOKEN")).set_api_url(Url::from_str(&unwrap_env("BOT_API_URL"))?);
 
     let listener = Polling::builder(bot.clone())
         .timeout(Duration::from_secs(parse_env("POLLING_TIMEOUT")))

src/dl.rs

@@ -9,6 +9,7 @@ use self::yt_dlp::{YtDlp, YtDlpError, YtDlpFormat, YtDlpInfo};
 
 pub mod ffmpeg;
 mod spawn;
+mod tmpfile;
 pub mod yt_dlp;
 
 pub enum DownloadError {

src/dl/tmpfile.rs

@@ -0,0 +1,44 @@
+use std::fs;
+use tracing::{event, Level};
+
+pub enum TmpFileError {
+    MakePathError
+}
+
+pub struct TmpFile {
+    pub path: String,
+}
+
+impl TmpFile {
+    pub fn new(filename: String) -> Result<Self, TmpFileError> {
+        let path = std::env::temp_dir()
+            .join(filename)
+            .into_os_string()
+            .into_string()
+            .map_err(|_| TmpFileError::MakePathError)?;
+        
+        Ok(Self { path })
+    }
+
+    pub fn exists(&self) -> bool {
+        match fs::metadata(&self.path) {
+            Ok(_) => true,
+            Err(_) => false
+        }
+    }
+
+    fn delete_if_exists(&self) {
+        if self.exists() {
+            if let Err(e) = fs::remove_file(&self.path) {
+                event!(Level::ERROR, "{}", e);
+            }
+        }
+        event!(Level::INFO, "deleted {}", self.path);
+    }
+}
+
+impl Drop for TmpFile {
+    fn drop(&mut self) {
+        self.delete_if_exists();
+    }
+}

src/dl/yt_dlp.rs

@@ -1,4 +1,5 @@
 use super::spawn::{spawn, SpawnError};
+use super::tmpfile::{TmpFile, TmpFileError};
 use core::fmt;
 use ordered_float::OrderedFloat;
 use serde::Deserialize;