init with some testing

.gitignore

@@ -8,3 +8,11 @@ Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+/target
+#Cargo.lock

Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "ytd-rs"
+version = "0.1.0"
+authors = ["Nils Pukropp <nils.pukropp@outlook.de>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/lib.rs

@@ -0,0 +1,9 @@
+pub mod ytd;
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}

src/ytd.rs

@@ -0,0 +1,81 @@
+//! Rust-Wrapper for youtube-dl
+
+use std::{
+    fs::{canonicalize, create_dir_all},
+    io::Error,
+    path::PathBuf,
+    process::ExitStatus,
+};
+use std::{path::Path, process::Command};
+
+pub struct YoutubeDL {
+    path: PathBuf,
+    link: String,
+    args: Vec<(String, Option<String>)>,
+}
+
+impl YoutubeDL {
+    pub fn new(
+        dl_path: &str,
+        args: Vec<(String, Option<String>)>,
+        link: String,
+    ) -> Result<YoutubeDL, String> {
+        // create path
+        let path = Path::new(dl_path);
+
+        // check if it already exists
+        if !path.exists() {
+            // if not create
+            if let Err(why) = create_dir_all(&path) {
+                return Err(format!("Error: {:?}", why));
+            }
+        }
+
+        // return error if no directory
+        if !path.is_dir() {
+            return Err("Error: path is not a directory".to_string());
+        }
+
+        // absolute path
+        match canonicalize(dl_path) {
+            // return new youtube-dl job
+            Ok(path) => Ok(YoutubeDL { path, link, args }),
+            Err(why) => Err(format!("Error: {:?}", why)),
+        }
+    }
+
+    pub fn download(&self) -> Result<&PathBuf, String> {
+        let result = self.spawn_youtube_dl();
+
+        if let Err(why) = result {
+            Err(format!("Error: {:?}", why))
+        } else {
+            Ok(&self.path)
+        }
+    }
+
+    fn spawn_youtube_dl(&self) -> Result<ExitStatus, Error> {
+        let mut path = self.path.clone();
+        path.push("%(title).90s.%(ext)s");
+        let mut cmd = Command::new("youtube-dl");
+        cmd.arg("--output")
+            .arg(format!("{}", path.display()))
+            .arg("--quiet")
+            .arg("--no-warnings");
+
+        for (opt, arg) in self.args.iter() {
+            match arg {
+                Some(arg) => cmd.arg(opt).arg(arg),
+                None => cmd.arg(opt),
+            };
+        }
+
+        cmd.arg(&self.link);
+
+        let mut pr = match cmd.spawn() {
+            Err(why) => panic!("couldn't spawn youtube-dl: {:?}", why),
+            Ok(process) => process,
+        };
+        pr.wait()
+    }
+}