1//! `previewgen frames <dir>` writes `background.svg` (the dot field, to rasterise once as `background.png`), `card.svg` and
2//! `frame-0001.svg`, …; `previewgen check-meta
3//! <file.html>` lists what a scraper would find wrong with a page's preview tags.
4
5use std::process::ExitCode;
6
7fn main() -> ExitCode {
8    let args: Vec<String> = std::env::args().skip(1).collect();
9    match args.iter().map(String::as_str).collect::<Vec<_>>().as_slice() {
10        ["frames", dir] => match write(dir) {
11            Ok(count) => {
12                eprintln!("previewgen: wrote card.svg and {count} frames ({} s at {} fps) to {dir}", previewgen::seconds(), previewgen::FPS);
13                ExitCode::SUCCESS
14            }
15            Err(why) => {
16                eprintln!("previewgen: {why}");
17                ExitCode::FAILURE
18            }
19        },
20        ["check-meta", file] => match std::fs::read_to_string(file) {
21            Ok(html) => {
22                let problems = jev_ui::preview::missing(&html, jev_ui::preview::Kind::Video);
23                for problem in &problems {
24                    eprintln!("previewgen: {problem}");
25                }
26                if problems.is_empty() {
27                    println!("previewgen: all {} tags a scraper needs are present", jev_ui::preview::required(jev_ui::preview::Kind::Video).len());
28                    ExitCode::SUCCESS
29                } else {
30                    ExitCode::FAILURE
31                }
32            }
33            Err(why) => {
34                eprintln!("previewgen: {file}: {why}");
35                ExitCode::FAILURE
36            }
37        },
38        ["mascot"] => {
39            println!("{}", cat::Mascot::DEFAULT.name());
40            ExitCode::SUCCESS
41        }
42        _ => {
43            eprintln!("usage: previewgen frames <dir> | previewgen check-meta <file.html> | previewgen mascot");
44            ExitCode::from(2)
45        }
46    }
47}
48
49fn write(dir: &str) -> std::io::Result<usize> {
50    std::fs::create_dir_all(dir)?;
51    std::fs::write(format!("{dir}/background.svg"), previewgen::background())?;
52    std::fs::write(format!("{dir}/card.svg"), previewgen::card())?;
53    let frames = previewgen::frames();
54    for (i, frame) in frames.iter().enumerate() {
55        std::fs::write(format!("{dir}/frame-{:04}.svg", i + 1), frame)?;
56    }
57    Ok(frames.len())
58}