refactor!: move downloader to seperate crate

downloader/src/util.rs

@@ -0,0 +1,42 @@
+use std::{borrow::Cow, collections::BTreeMap};
+
+use reqwest::Url;
+
+/// Error from the video downloader
+#[derive(thiserror::Error, Debug)]
+#[non_exhaustive]
+pub enum DownloadError {
+    /// Error from the HTTP client
+    #[error("http error: {0}")]
+    Http(#[from] reqwest::Error),
+    /// File IO error
+    #[error(transparent)]
+    Io(#[from] std::io::Error),
+    #[error("FFmpeg error: {0}")]
+    Ffmpeg(Cow<'static, str>),
+    #[error("Progressive download error: {0}")]
+    Progressive(Cow<'static, str>),
+    #[error("input error: {0}")]
+    Input(Cow<'static, str>),
+    #[error("error: {0}")]
+    Other(Cow<'static, str>),
+}
+
+/// Split an URL into its base string and parameter map
+///
+/// Example:
+///
+/// `example.com/api?k1=v1&k2=v2 => example.com/api; {k1: v1, k2: v2}`
+pub fn url_to_params(url: &str) -> Result<(Url, BTreeMap<String, String>), DownloadError> {
+    let mut parsed_url = Url::parse(url).map_err(|e| {
+        DownloadError::Other(format!("could not parse url `{}` err: {}", url, e).into())
+    })?;
+    let url_params: BTreeMap<String, String> = parsed_url
+        .query_pairs()
+        .map(|(k, v)| (k.to_string(), v.to_string()))
+        .collect();
+
+    parsed_url.set_query(None);
+
+    Ok((parsed_url, url_params))
+}