add progress indicator for downloading video parts

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "twitch_data"
-version = "0.2.4"
+version = "0.2.5"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

src/lib.rs

@@ -1,6 +1,13 @@
-#[allow(unused, dead_code)]
-//^^ hides some warnings while developing TODO: remove at release
-use crate::prelude::*;
+use std::{
+    collections::HashMap,
+    error::Error as StdError,
+    fmt::Debug,
+    path::{Path, PathBuf},
+    result::Result as StdResult,
+    sync::atomic::{AtomicUsize, Ordering},
+    sync::Arc,
+};
+
 use chrono::{DateTime, Utc};
 use downloader_config::load_config;
 use exponential_backoff::twitch::{
@@ -9,24 +16,23 @@ use exponential_backoff::twitch::{
 };
 use futures::StreamExt;
 use serde::{Deserialize, Serialize};
-use std::collections::HashMap;
-use std::error::Error as StdError;
-use std::fmt::Debug;
-use std::path::{Path, PathBuf};
-use std::result::Result as StdResult;
 use thiserror::Error;
 use tokio::fs::File;
 use tokio::io::AsyncWriteExt;
 use tokio::process::Command;
+use tokio::task::JoinHandle;
 use tokio::time::Duration;
 use tokio::time::Instant;
 use twitch_api::helix::channels::ChannelInformation;
 use twitch_api::helix::videos::Video as TwitchVideo;
 use twitch_api::types::{Timestamp, VideoPrivacy};
 use twitch_oauth2::{ClientId, ClientSecret};
-
 pub use twitch_types::{UserId, VideoId};
 
+#[allow(unused, dead_code)]
+//^^ hides some warnings while developing TODO: remove at release
+use crate::prelude::*;
+
 pub mod prelude;
 
 //region DownloadError
@@ -491,7 +497,7 @@ impl<'a> TwitchClient<'a> {
     ) -> Result<Vec<Option<PathBuf>>> {
         trace!("downloading all parts of video: {}", url);
         let config = load_config();
-        let mut amount_of_threads: u64 = config.twitch_downloader_thread_count;
+        let mut amount_of_threads = config.twitch_downloader_thread_count as usize;
         let base_url = get_base_url(&url);
         info!("getting parts");
         let (age, parts) = self.get_parts(&url).await?;
@@ -499,14 +505,14 @@ impl<'a> TwitchClient<'a> {
         info!("getting parts ...Done");
 
         let amount_of_parts = parts.len();
-        let amount_of_parts = amount_of_parts as u64;
+        let amount_of_parts = amount_of_parts;
         info!("part count: {}", amount_of_parts);
         if amount_of_parts < 1 {
             return Err(Box::new(DownloadError::NoParts));
         }
 
         //download parts
-        std::fs::create_dir_all(&folder_path)?;
+        std::fs::create_dir_all(folder_path)?;
 
         info!("downloading parts");
 
@@ -515,19 +521,63 @@ impl<'a> TwitchClient<'a> {
         } else if amount_of_threads > amount_of_parts {
             amount_of_threads = amount_of_parts;
         }
-
+        let (completed, progress_handle) = Self::create_progress_indicator(
+            amount_of_parts,
+            Duration::from_secs(5),
+            "Downloading Parts",
+        );
         let files = futures::stream::iter(parts.into_iter().map(|part| {
             let folder_path = folder_path.clone();
             let url = base_url.clone();
-            download_part(part, url, folder_path, try_unmute)
+            async {
+                let result = download_part(part, url, folder_path, try_unmute).await;
+                completed.fetch_add(1, Ordering::Relaxed);
+                result
+            }
         }))
-        .buffer_unordered(amount_of_threads as usize)
+        .buffer_unordered(amount_of_threads)
         .collect::<Vec<Option<PathBuf>>>();
         let files = files.await;
+
+        // Once we're done downloading, we need to ensure the progress reporter also finishes.
+        let _ = progress_handle.await;
+
         info!("downloaded all parts of the video");
         Ok(files)
     }
 
+    fn create_progress_indicator(
+        amount_of_parts: usize,
+        report_frequency: Duration,
+        title: impl Into<&str>,
+    ) -> (Arc<AtomicUsize>, JoinHandle<()>) {
+        let completed = Arc::new(AtomicUsize::new(0));
+        let progress_handle = {
+            let completed = Arc::clone(&completed);
+            tokio::spawn(async move {
+                while Arc::strong_count(&completed) > 1 {
+                    // Using strong_count to check the arc's reference count to determine when all tasks are done
+                    let current_progress = completed.load(Ordering::Relaxed);
+                    info!(
+                        "{}: {:>6.2}% ({}/{})",
+                        title.into(),
+                        (current_progress as f64 / amount_of_parts as f64) * 100.0,
+                        current_progress,
+                        amount_of_parts
+                    );
+                    tokio::time::sleep(report_frequency).await;
+                    // sleep for a while
+                }
+                info!(
+                    "Completed: {}/{}",
+                    completed.load(Ordering::Relaxed),
+                    amount_of_parts
+                );
+            })
+        };
+        (completed, progress_handle)
+    }
+
     async fn get_parts(&self, url: &String) -> Result<(u64, HashMap<String, f32>)> {
         // let response = self.reqwest_client.get(url).send().await?;
         trace!("getting parts from url: {}", url);