Create downloader layer + manage library installation

src/types.rs

@@ -0,0 +1,31 @@
+use crate::video_quality::VideoDownloadQuality;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Default)]
+pub(crate) struct Video {
+    pub(crate) meta_data: MetaData,
+    pub(crate) video_path: String,
+    pub(crate) video_quality: VideoDownloadQuality,
+    pub(crate) downloaded: bool,
+}
+
+#[derive(Serialize, Deserialize, Default)]
+pub(crate) struct MetaData {
+    pub(crate) title: String,
+    pub(crate) author: String,
+    pub(crate) description: String,
+    pub(crate) original_url: String,
+    pub(crate) has_thumbnail: bool,
+    pub(crate) thumbnail_path: String,
+    pub(crate) thumbnail_path_low_quality: String,
+    pub(crate) downloaded: bool,
+    pub(crate) date_downloaded: String,
+    pub(crate) date_published: String,
+}
+
+#[derive(Serialize, Deserialize, Default)]
+pub(crate) struct Playlist {
+    pub(crate) meta_data: MetaData,
+    pub(crate) videos: Vec<Video>,
+    pub(crate) num_videos: usize,
+}