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use std::io::{self, Write};
use std::fs::{File, OpenOptions};
use argparse::{ArgumentParser, Store, StoreTrue, StoreOption};
use crate::error::IntoIOError;
use crate::id3v2::{ID3v2, Frame};
use crate::options::Options;
mod encoding;
mod error;
mod id3v1;
mod id3v2;
mod options;
fn parse_options_into(opt: &mut Options) {
let mut ap = ArgumentParser::new();
ap.set_description("ID3v2 tag editor/fixer. Incomplete/work-in-progress. Support for ID3v2.3, with partial support of ID3v2.4 (no footer tags supported).");
ap.refer(&mut opt.write)
.add_option(&["-w", "--write"], StoreTrue,
"Write updated information instead of just displaying. Unmodified or unknown tags are preserved as-is.");
ap.refer(&mut opt.clean)
.add_option(&["--clean"], StoreTrue,
"Remove any existing fields in ID3v2.* tag, and convert to ID3v2.3 (pending commit with --write)");
ap.refer(&mut opt.latin1_as_utf8)
.add_option(&["--assume-utf8"], StoreTrue,
"Assume that all strings specified in the MP3 as Latin-1 are really UTF-8.");
ap.refer(&mut opt.remove_v1)
.add_option(&["--remove-v1"], StoreTrue,
"Remove any existing ID3v1.* tags.");
ap.refer(&mut opt.set_tags.album) .add_option(&["-A", "--album"], StoreOption, "Set/replace album");
ap.refer(&mut opt.set_tags.artist).add_option(&["-a", "--artist"], StoreOption, "Set/replace artist");
ap.refer(&mut opt.set_tags.title) .add_option(&["-t", "--title"], StoreOption, "Set/replace title");
ap.refer(&mut opt.set_tags.track) .add_option(&["-T", "--track"], StoreOption, "Set/replace track number (num or num/num)");
ap.refer(&mut opt.set_tags.year) .add_option(&["-y", "--year"], StoreOption, "Set/replace year");
ap.refer(&mut opt.file)
.required()
.add_argument("file", Store,
"File to operate on (probably a .mp3)");
ap.parse_args_or_exit();
}
fn parse_options() -> Options {
let mut options = Default::default();
parse_options_into(&mut options);
options
}
fn print_tag(tag: &ID3v2) -> io::Result<()> {
for frame in &tag.frames {
match frame.interpret()? {
Some(Frame::TALB(album)) => println!("Album : '{}'", album),
Some(Frame::TIT2(title)) => println!("Title : '{}'", title),
Some(Frame::TPE1(artist)) => println!("Artist: '{}'", artist),
Some(Frame::TYER(year)) => println!("Year : '{}'", year),
Some(Frame::TRCK(track)) => println!("Track : '{}'", track),
None => {
println!("Unknown frame: {:?}", frame);
}
}
}
Ok(())
}
fn modify_tag(tag: &mut ID3v2, new_frame: Frame) -> io::Result<()> {
let mut indices = Vec::new();
for (i, frame) in tag.frames.iter().enumerate() {
if frame.get_id() == new_frame.id() {
indices.push(i);
}
}
match indices.len() {
0 => {
tag.frames.push(tag.to_raw(new_frame)?);
}
1 => {
tag.frames[indices[0]] = tag.to_raw(new_frame)?;
}
_ => {
return Err(format!("Multiple frames of type {} found", new_frame.id()).ioerr());
}
}
Ok(())
}
fn main() -> io::Result<()> {
let options = parse_options();
let open_read = || File::open(&options.file);
let open_write = || OpenOptions::new().write(true).open(&options.file);
let mut tag = {
let (tag, tag_v1) = {
let mut file = open_read()?;
let tag = ID3v2::from_stream(&mut file)?;
let tag_v1 = id3v1::recognise(&mut file)?;
(tag, tag_v1)
};
if options.remove_v1 {
if let Some(tag_type) = tag_v1 {
id3v1::remove_tag(&mut open_write()?, tag_type)?;
} else {
eprintln!("WARNING: Told to remove ID3v1 tag while none is present.");
}
} else {
if let Some(tag_type) = tag_v1 {
let descr = match tag_type {
id3v1::TagType::TAGv10 => "ID3v1.0",
id3v1::TagType::TAGv11 => "ID3v1.1",
id3v1::TagType::TAGv12 => "ID3v1.2",
};
eprintln!("WARNING: {} tag found at end of file; use --remove-v1 to remove it.", descr);
}
}
tag
};
if options.clean {
tag.frames.clear();
tag.version_sub = 3;
eprintln!("NOTE: Removed all existing fields and set version sub to 3 (to make an ID3v2.3 tag)");
}
if options.latin1_as_utf8 {
for frame in &mut tag.frames {
if let Some(new_frame) =
frame.map_string(|s| encoding::from_utf8_mistaken_as_latin1(&s)
.expect("String cannot be encoded in ID3v2 (outside of Unicode BMP)"))? {
*frame = new_frame;
}
}
}
if let Some(s) = &options.set_tags.album { modify_tag(&mut tag, Frame::TALB(s.clone()))?; }
if let Some(s) = &options.set_tags.artist { modify_tag(&mut tag, Frame::TPE1(s.clone()))?; }
if let Some(s) = &options.set_tags.title { modify_tag(&mut tag, Frame::TIT2(s.clone()))?; }
if let Some(s) = &options.set_tags.track { modify_tag(&mut tag, Frame::TRCK(s.clone()))?; }
if let Some(s) = &options.set_tags.year { modify_tag(&mut tag, Frame::TYER(s.clone()))?; }
print_tag(&tag)?;
// TODO: if -w, then write tags to file (if it fits)
if options.write {
let encoded = tag.encode()?;
open_write()?.write_all(&encoded)?;
println!("Tag written!");
}
Ok(())
}
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