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//! Utility functions and constants
//!
//! **Why**: Centralized helpers used across multiple modules
//!
//! **Used by**: cache, sequence, frame, ui modules
/// Media file type detection
pub mod media {
use std::path::Path;
/// Supported video file extensions
pub const VIDEO_EXTS: &[&str] = &["mp4", "mov", "avi", "mkv"];
/// All supported file extensions (video + image)
pub const ALL_EXTS: &[&str] = &[
"exr", "png", "jpg", "jpeg", "tif", "tiff", "tga", "hdr", "mp4", "mov", "avi", "mkv",
];
/// Check if file is a video format
/// Handles video frame paths with @N suffix (e.g., "video.mp4@135")
pub fn is_video(path: &Path) -> bool {
// Strip @N suffix if present (video frame indicator)
let path_str = path.to_string_lossy();
let base_path = if let Some(at_pos) = path_str.rfind('@') {
// Check if everything after @ is a number
if path_str[at_pos + 1..].chars().all(|c| c.is_ascii_digit()) {
&path_str[..at_pos]
} else {
&path_str[..]
}
} else {
&path_str[..]
};
Path::new(base_path)
.extension()
.and_then(|s| s.to_str())
.map(|s| VIDEO_EXTS.contains(&s.to_lowercase().as_str()))
.unwrap_or(false)
}
/// Parse video path with optional frame suffix.
/// "video.mp4@17" -> (PathBuf("video.mp4"), Some(17))
/// "video.mp4" -> (PathBuf("video.mp4"), None)
pub fn parse_video_path(path: &Path) -> (std::path::PathBuf, Option<usize>) {
let path_str = path.to_string_lossy();
if let Some(at_pos) = path_str.rfind('@') {
// Ensure suffix after @ is numeric
let suffix = &path_str[at_pos + 1..];
if suffix.chars().all(|c| c.is_ascii_digit()) && !suffix.is_empty() {
let base = &path_str[..at_pos];
let frame_num = suffix.parse().ok();
return (std::path::PathBuf::from(base), frame_num);
}
}
(path.to_path_buf(), None)
}
}