From 0e4286cf83a4c743037a17cb1f5eb4b74b41f348 Mon Sep 17 00:00:00 2001
From: Paul van Tilburg <paul@luon.net>
Date: Tue, 14 Aug 2018 16:28:36 +0200
Subject: [PATCH] Add a first version of the music-sync tool

---
 .gitignore      |   2 +
 Cargo.lock      | 695 ++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml      |  11 +
 src/main.rs     | 148 +++++++++++
 src/registry.rs | 109 ++++++++
 5 files changed, 965 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs
 create mode 100644 src/registry.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..53eaa21
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+**/*.rs.bk
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..77d0a4e
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,695 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..6b33fb0
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "music-sync"
+version = "0.1.0"
+authors = ["Paul van Tilburg <paul@luon.net>"]
+
+[dependencies]
+clap = "2.32.0"
+cursive = "0.9.0"
+failure = "0.1.2"
+lazy_static = "1"
+walkdir = "2"
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..5d9b5f9
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,148 @@
+#![allow(unknown_lints)]
+#![warn(clippy)]
+
+extern crate clap;
+extern crate cursive;
+extern crate failure;
+#[macro_use]
+extern crate lazy_static;
+extern crate walkdir;
+
+use clap::{App, Arg};
+use cursive::traits::*;
+use cursive::views::{Checkbox, Dialog, ListView, ProgressBar, TextView};
+use cursive::Cursive;
+use failure::Error;
+use std::ffi::OsStr;
+use std::path::PathBuf;
+use std::sync::{Arc, Mutex};
+
+use registry::Registry;
+
+lazy_static! {
+    static ref REGISTRY: Arc<Mutex<Registry>> = Arc::new(Mutex::new(Registry::default()));
+}
+
+mod registry;
+fn main() -> Result<(), Error> {
+    let matches = App::new("Music Sync")
+        .version("0.1.0")
+        .author("Paul van Tilburg <paul@luon.net>")
+        .about("Syncs selected music (albums) to a remote location using rsync")
+        .arg(Arg::with_name("device").index(1).required(true))
+        .arg(Arg::with_name("directory").index(2).required(true))
+        .get_matches();
+    let device = matches.value_of("device").unwrap();
+    let base_path = matches.value_of("directory").unwrap();
+    {
+        let mut registry = REGISTRY.lock().unwrap();
+        registry.device = String::from(device);
+        registry.base_path = PathBuf::from(base_path);
+    }
+
+    let mut ui = Cursive::default();
+    load_albums(&mut ui);
+
+    ui.set_fps(10);
+    ui.run();
+    Ok(())
+}
+
+fn load_albums(ui: &mut Cursive) {
+    let cb = ui.cb_sink().clone();
+    ui.add_layer(
+        Dialog::around(ProgressBar::new()
+                .range(0, 603) // FIXME: No idea what to put here.
+                .with_task(move |counter| {
+                    let mut registry = REGISTRY.lock().unwrap();
+                    if let Err(error) = registry.load_albums_fs(&counter) {
+                        eprintln!("Something went wrong: {}", error);
+                        cb.send(Box::new(quit));
+                    } else if let Err(error) = registry.load_albums_file() {
+                        eprintln!("Something went wrong: {}", error);
+                        cb.send(Box::new(quit));
+                    } else {
+                        cb.send(Box::new(select_albums));
+                    }
+                })).title("Loading list of albums…"),
+    );
+}
+
+fn album_name(album_path: &PathBuf) -> &str {
+    album_path
+        .file_name()
+        .unwrap_or_else(|| OsStr::new("<Couldn't determine filename>"))
+        .to_str()
+        .unwrap_or("<Non-UTF-8 characters found>")
+}
+
+fn select_albums(ui: &mut Cursive) {
+    let registry = REGISTRY.lock().unwrap();
+    let added_albums = registry.added_albums();
+    let existing_albums = registry.existing_albums();
+    let removed_albums = registry.removed_albums();
+    let list_view = ListView::new()
+        .with(|list_view| {
+            list_view.add_child("--- New", Checkbox::new().disabled());
+            for album_path in added_albums {
+                let album_name = album_name(&album_path);
+                let album_path = album_path.clone();
+
+                let mut checkbox = Checkbox::new().on_change(move |_, checked| {
+                    let mut registry = REGISTRY.lock().unwrap();
+                    registry.select_album(&album_path, checked);
+                });
+                list_view.add_child(album_name, checkbox);
+            }
+            list_view.add_child("--- Existing ", Checkbox::new().disabled());
+            for album_path in existing_albums {
+                let album_name = album_name(&album_path);
+                let album_path = album_path.clone();
+                let selected = registry.selected_albums.contains(&album_path);
+                
+                let mut checkbox = Checkbox::new().on_change(move |_, checked| {
+                    let mut registry = REGISTRY.lock().unwrap();
+                    registry.select_album(&album_path, checked);
+                });
+                if selected {
+                    checkbox.check();
+                }
+                list_view.add_child(album_name, checkbox)
+            }
+            list_view.add_child("--- Gone ", Checkbox::new().disabled());
+            for album_path in removed_albums {
+                let mut checkbox = Checkbox::new().disabled();
+                if registry.selected_albums.contains(album_path) {
+                    checkbox.check();
+                }
+                list_view.add_child(album_name(album_path), checkbox);
+            }
+        }).scrollable();
+
+    ui.pop_layer();
+    ui.add_layer(
+        Dialog::new()
+            .title("Select or unselect albums")
+            .button("Quit", |ui| quit(ui))
+            .button("Apply", |ui| save_albums(ui))
+            .content(list_view),
+    );
+}
+
+fn save_albums(ui: &mut Cursive) {
+    let registry = REGISTRY.lock().unwrap();
+    if let Err(error) = registry.save_albums_file() {
+        eprintln!("Something went wrong: {}", error);
+        quit(ui);
+    }
+
+    ui.pop_layer();
+    ui.add_layer(
+        Dialog::around(TextView::new("All albums have been saved!"))
+            .button("Ok", |ui| ui.quit())
+    );
+}
+
+fn quit(ui: &mut Cursive) {
+    ui.quit();
+}
diff --git a/src/registry.rs b/src/registry.rs
new file mode 100644
index 0000000..f989840
--- /dev/null
+++ b/src/registry.rs
@@ -0,0 +1,109 @@
+use cursive::utils::Counter;
+use failure::Error;
+use std::collections::HashSet;
+use std::fs::File;
+use std::io::prelude::*;
+use std::path::PathBuf;
+use walkdir::{DirEntry, WalkDir};
+
+#[derive(Default)]
+pub struct Registry {
+    pub device: String,
+    pub base_path: PathBuf,
+    pub albums_fs: HashSet<PathBuf>,
+    pub albums_list: HashSet<PathBuf>,
+    pub selected_albums: HashSet<PathBuf>,
+}
+
+impl Registry {
+    pub fn load_albums_fs(&mut self, counter: &Counter) -> Result<(), Error> {
+        let dir_walker = WalkDir::new(self.base_path.clone())
+            .sort_by(|a, b| a.path().cmp(b.path()))
+            .min_depth(2)
+            .max_depth(2);
+        let dir_filter = |entry: &DirEntry| {
+            // The entry should be a directory and its name should not start with "extra"
+            entry.metadata().map(|e| e.is_dir()).unwrap_or(false) && !entry
+                .file_name()
+                .to_str()
+                .map(|s| s.starts_with("extra"))
+                .unwrap_or(true)
+        };
+
+        for entry in dir_walker.into_iter().filter_entry(dir_filter) {
+            self.albums_fs.insert(PathBuf::from(
+                entry?
+                    .path()
+                    .strip_prefix(self.base_path.clone())?
+                    .to_str()
+                    .unwrap(),
+            ));
+            counter.tick(1);
+        }
+        counter.set(603);
+        Ok(())
+    }
+
+    pub fn load_albums_file(&mut self) -> Result<(), Error> {
+        let mut file = File::open(format!("{}.list", self.device))?;
+        let mut contents = String::new();
+        file.read_to_string(&mut contents)?;
+        let line_filter = |line: &&str| line.ends_with("***");
+
+        for line in contents.lines().filter(line_filter) {
+            let path = line.trim_left_matches('#').trim_right_matches("/***");
+            if !line.starts_with('#') {
+                self.selected_albums.insert(PathBuf::from(path));
+            }
+            self.albums_list.insert(PathBuf::from(path));
+        }
+        Ok(())
+    }
+
+    pub fn save_albums_file(&self) -> Result<(), Error> {
+        let mut file = File::create(format!("{}.list.new", self.device))?;
+        let mut cur_parent = PathBuf::new();
+
+        let mut albums: Vec<&PathBuf> = self.albums_fs.iter().collect();
+        albums.sort();
+        for album in albums {
+            let parent = album.parent().unwrap();
+            if parent != cur_parent {
+                writeln!(file, "{}/", parent.to_str().unwrap());
+                cur_parent = parent.to_path_buf();
+            }
+            if self.selected_albums.contains(album) {
+                writeln!(file, "{}/***", album.to_str().unwrap());
+            } else {
+                writeln!(file, "#{}/***", album.to_str().unwrap());
+            }
+        }
+        Ok(())
+    }
+
+    pub fn added_albums(&self) -> Vec<&PathBuf> {
+        let mut result: Vec<&PathBuf> = self.albums_fs.difference(&self.albums_list).collect();
+        result.sort();
+        result
+    }
+
+    pub fn existing_albums(&self) -> Vec<&PathBuf> {
+        let mut result: Vec<&PathBuf> = self.albums_fs.intersection(&self.albums_list).collect();
+        result.sort();
+        result
+    }
+
+    pub fn removed_albums(&self) -> Vec<&PathBuf> {
+        let mut result: Vec<&PathBuf> = self.albums_list.difference(&self.albums_fs).collect();
+        result.sort();
+        result
+    }
+   
+    pub fn select_album(&mut self, album_path: &PathBuf, result: bool) {
+        if result {
+            self.selected_albums.insert(album_path.clone());
+        } else {
+            self.selected_albums.remove(album_path);
+        }
+    }
+}