| 1 | //! Turn command-line paths into the initial file list. |
| 2 | |
| 3 | use std::path::{Path, PathBuf}; |
| 4 | use std::time::{SystemTime, UNIX_EPOCH}; |
| 5 | |
| 6 | use crate::decode; |
| 7 | use crate::state::queue::{SortKey, sort_files}; |
| 8 | |
| 9 | #[derive(Debug, Default)] |
| 10 | pub struct Scan { |
| 11 | pub files: Vec<PathBuf>, |
| 12 | /// The file to open first (a single file argument opened with its siblings). |
| 13 | pub start: Option<PathBuf>, |
| 14 | /// Files with unrecognised extensions, to sniff in the background. |
| 15 | pub unknown: Vec<PathBuf>, |
| 16 | pub errors: Vec<String>, |
| 17 | } |
| 18 | |
| 19 | pub struct ScanOptions { |
| 20 | pub recursive: bool, |
| 21 | pub siblings: bool, |
| 22 | pub sort: SortKey, |
| 23 | pub reverse: bool, |
| 24 | } |
| 25 | |
| 26 | pub fn scan(args: &[PathBuf], opts: &ScanOptions) -> Scan { |
| 27 | let dot = [PathBuf::from(".")]; |
| 28 | let args = if args.is_empty() { &dot[..] } else { args }; |
| 29 | let mut out = Scan::default(); |
| 30 | for arg in args { |
| 31 | let path = std::path::absolute(arg).unwrap_or_else(|_| arg.clone()); |
| 32 | let Ok(meta) = std::fs::metadata(&path) else { |
| 33 | out.errors.push(format!("{}: not found", arg.display())); |
| 34 | continue; |
| 35 | }; |
| 36 | if meta.is_dir() { |
| 37 | let mut files = Vec::new(); |
| 38 | list_dir(&path, opts.recursive, &mut files, &mut out.unknown); |
| 39 | sort(&mut files, opts); |
| 40 | out.files.extend(files); |
| 41 | } else if opts.siblings && args.len() == 1 { |
| 42 | let parent = path.parent().unwrap_or(Path::new("/")); |
| 43 | let mut files = Vec::new(); |
| 44 | list_dir(parent, false, &mut files, &mut out.unknown); |
| 45 | out.unknown.retain(|u| *u != path); |
| 46 | if !files.contains(&path) { |
| 47 | files.push(path.clone()); |
| 48 | } |
| 49 | sort(&mut files, opts); |
| 50 | out.files.extend(files); |
| 51 | out.start = Some(path); |
| 52 | } else { |
| 53 | // Explicitly named files are always attempted, whatever their extension. |
| 54 | out.files.push(path); |
| 55 | } |
| 56 | } |
| 57 | out |
| 58 | } |
| 59 | |
| 60 | fn sort(files: &mut [PathBuf], opts: &ScanOptions) { |
| 61 | let meta = |p: &Path| { |
| 62 | std::fs::metadata(p).map_or((0, 0), |m| { |
| 63 | let mtime = m |
| 64 | .modified() |
| 65 | .ok() |
| 66 | .and_then(|t| t.duration_since(UNIX_EPOCH).ok()) |
| 67 | .map_or(0, |d| d.as_secs() as i64); |
| 68 | (mtime, m.len()) |
| 69 | }) |
| 70 | }; |
| 71 | let seed = SystemTime::now() |
| 72 | .duration_since(UNIX_EPOCH) |
| 73 | .map_or(1, |d| d.as_nanos() as u64); |
| 74 | sort_files(files, opts.sort, opts.reverse, meta, seed); |
| 75 | } |
| 76 | |
| 77 | /// Collect visible files under `dir`. Symlinked directories are not followed. |
| 78 | fn list_dir(dir: &Path, recursive: bool, known: &mut Vec<PathBuf>, unknown: &mut Vec<PathBuf>) { |
| 79 | let Ok(entries) = std::fs::read_dir(dir) else { |
| 80 | log::warn!("cannot read {}", dir.display()); |
| 81 | return; |
| 82 | }; |
| 83 | for entry in entries.flatten() { |
| 84 | if entry.file_name().as_encoded_bytes().starts_with(b".") { |
| 85 | continue; |
| 86 | } |
| 87 | let path = entry.path(); |
| 88 | let Ok(ft) = entry.file_type() else { continue }; |
| 89 | if ft.is_dir() { |
| 90 | if recursive { |
| 91 | list_dir(&path, true, known, unknown); |
| 92 | } |
| 93 | continue; |
| 94 | } |
| 95 | if ft.is_symlink() && std::fs::metadata(&path).is_ok_and(|m| m.is_dir()) { |
| 96 | continue; |
| 97 | } |
| 98 | if decode::is_known_extension(&path) { |
| 99 | known.push(path); |
| 100 | } else { |
| 101 | unknown.push(path); |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | #[cfg(test)] |
| 107 | mod tests { |
| 108 | use super::*; |
| 109 | |
| 110 | fn opts() -> ScanOptions { |
| 111 | ScanOptions { |
| 112 | recursive: false, |
| 113 | siblings: true, |
| 114 | sort: SortKey::Natural, |
| 115 | reverse: false, |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | #[test] |
| 120 | fn single_file_opens_with_siblings() { |
| 121 | let dir = std::env::temp_dir().join(format!("remage-scan-{}", std::process::id())); |
| 122 | std::fs::create_dir_all(dir.join("sub")).unwrap(); |
| 123 | for f in ["b10.png", "b2.jpg", ".hidden.png", "notes.txt", "sub/c.png"] { |
| 124 | std::fs::write(dir.join(f), b"").unwrap(); |
| 125 | } |
| 126 | let s = scan(&[dir.join("b10.png")], &opts()); |
| 127 | let names: Vec<_> = s.files.iter().map(|p| p.file_name().unwrap()).collect(); |
| 128 | assert_eq!(names, ["b2.jpg", "b10.png"]); |
| 129 | assert_eq!(s.start.as_deref(), Some(dir.join("b10.png").as_path())); |
| 130 | assert_eq!(s.unknown, [dir.join("notes.txt")]); |
| 131 | |
| 132 | let s = scan( |
| 133 | std::slice::from_ref(&dir), |
| 134 | &ScanOptions { |
| 135 | recursive: true, |
| 136 | ..opts() |
| 137 | }, |
| 138 | ); |
| 139 | assert_eq!(s.files.len(), 3); |
| 140 | assert!(s.start.is_none()); |
| 141 | std::fs::remove_dir_all(&dir).unwrap(); |
| 142 | } |
| 143 | } |