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authorJames Campos <james.r.campos@gmail.com>2020-04-22 06:12:52 -0700
committerJames Campos <james.r.campos@gmail.com>2020-04-22 06:12:52 -0700
commit6bd8a589fe7e404e2234a67d15a497c0005dc57e (patch)
treed49aadb5607cbb7caa082abd63cba46d4862d20c /src
parent3f2faf4167a7783b30564c09d3b782938e35e3e0 (diff)
downloadbk-6bd8a589fe7e404e2234a67d15a497c0005dc57e.tar.gz
exit if no save file or arg
Diffstat (limited to 'src')
-rw-r--r--src/main.rs62
1 files changed, 37 insertions, 25 deletions
diff --git a/src/main.rs b/src/main.rs
index 280aa2a..8a31bc7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -189,8 +189,7 @@ impl Bk {
self.pos = 0;
}
}
- KeyCode::Up
- | KeyCode::Char('k') => {
+ KeyCode::Up | KeyCode::Char('k') => {
if self.pos > 0 {
self.pos -= 1;
} else if self.chapter_idx > 0 {
@@ -198,9 +197,7 @@ impl Bk {
self.pos = (self.chapter.len() / self.rows) * self.rows;
}
}
- KeyCode::Left
- | KeyCode::PageUp
- | KeyCode::Char('h') => {
+ KeyCode::Left | KeyCode::PageUp | KeyCode::Char('h') => {
if self.pos > 0 {
self.pos = self.pos.saturating_sub(self.rows);
} else if self.chapter_idx > 0 {
@@ -208,8 +205,7 @@ impl Bk {
self.pos = (self.chapter.len() / self.rows) * self.rows;
}
}
- KeyCode::Down
- | KeyCode::Char('j') => {
+ KeyCode::Down | KeyCode::Char('j') => {
if self.pos < self.chapter.len() - 1 {
self.pos += 1;
} else if self.chapter_idx < self.toc.len() - 1 {
@@ -238,7 +234,8 @@ impl Bk {
stdout,
terminal::Clear(terminal::ClearType::All),
cursor::MoveTo(self.pad, 0),
- ).unwrap();
+ )
+ .unwrap();
let end = std::cmp::min(self.pos + self.rows, self.chapter.len());
for line in self.pos..end {
@@ -247,33 +244,48 @@ impl Bk {
Print(&self.chapter[line]),
cursor::MoveToNextLine(1),
cursor::MoveRight(self.pad)
- ).unwrap();
+ )
+ .unwrap();
}
stdout.flush().unwrap();
}
}
-fn restore(save_path: &str) -> (String, usize, usize) {
- let save = std::fs::read_to_string(save_path).unwrap();
- let mut lines = save.lines();
- let path = lines.next().unwrap().to_string();
+fn restore() -> Option<(String, usize, usize)> {
+ let path = std::env::args().nth(1);
+ let save_path =
+ format!("{}/.local/share/bk", std::env::var("HOME").unwrap());
+ let save = std::fs::read_to_string(save_path);
- if let Some(p) = std::env::args().nth(1) {
- if p != path {
- return (p, 0, 0);
+ let get_save = |s: String| {
+ let mut lines = s.lines();
+ (
+ lines.next().unwrap().to_string(),
+ lines.next().unwrap().parse::<usize>().unwrap(),
+ lines.next().unwrap().parse::<usize>().unwrap(),
+ )
+ };
+
+ match (save, path) {
+ (Err(_), None) => None,
+ (Err(_), Some(path)) => Some((path, 0, 0)),
+ (Ok(save), None) => Some(get_save(save)),
+ (Ok(save), Some(path)) => {
+ let save = get_save(save);
+ if save.0 == path {
+ Some(save)
+ } else {
+ Some((path, 0, 0))
+ }
}
}
- (
- path,
- lines.next().unwrap().to_string().parse::<usize>().unwrap(),
- lines.next().unwrap().to_string().parse::<usize>().unwrap(),
- )
}
fn main() -> crossterm::Result<()> {
- let save_path =
- format!("{}/.local/share/bk", std::env::var("HOME").unwrap());
- let (path, chapter, pos) = restore(&save_path);
+ let (path, chapter, pos) = restore().unwrap_or_else(|| {
+ println!("usage: bk path");
+ std::process::exit(1);
+ });
let mut bk = Bk::new(&path, chapter, pos, 2).unwrap_or_else(|e| {
println!("error reading epub: {}", e);
@@ -294,7 +306,7 @@ fn main() -> crossterm::Result<()> {
}
std::fs::write(
- save_path,
+ format!("{}/.local/share/bk", std::env::var("HOME").unwrap()),
format!("{}\n{}\n{}", path, bk.chapter_idx, bk.pos),
)
.unwrap();