Add file download logic

All files in file_entries are downloaded according to their full_path.

1 files changed, 34 insertions, 0 deletions

diff --git a/src/epub.rs b/src/epub.rs
new file mode 100644
index 0000000..0c0bc74
--- /dev/null
+++ b/src/epub.rs
@@ -0,0 +1,34 @@
+use crate::models::FileEntry;
+use anyhow::Result;
+use reqwest::Client;
+use std::path::Path;
+use tokio::{
+    fs::{self, File},
+    io::AsyncWriteExt,
+};
+
+pub async fn download_all_files(
+    client: &Client,
+    file_entries: &[FileEntry],
+    dest_root: &Path,
+) -> Result<()> {
+    for entry in file_entries {
+        let dest_path = dest_root.join(&entry.full_path);
+
+        if let Some(parent_dir) = dest_path.parent() {
+            fs::create_dir_all(parent_dir).await?;
+        }
+
+        let mut file = File::create(dest_path).await?;
+        let bytes = client
+            .get(&entry.url)
+            .send()
+            .await?
+            .error_for_status()?
+            .bytes()
+            .await?;
+
+        file.write_all(&bytes).await?;
+    }
+    Ok(())
+}