Basic usage

This can be used by adding rtag to your dependencies in your project's Cargo.toml.

[dependencies]
rtag = "0.3.5"

and this to your crate root:

extern crate rtag;

Example: reading and filtering

When you read a frame information, you use [Unit](metadata/enum.Unit.html).

Example: reading V1 frame.

use rtag::metadata::Unit;
use rtag::metadata::MetadataReader;

for m in MetadataReader::new("./test-resources/v1-v2.mp3").unwrap() {
    match m {
        Unit::FrameV1(frame) => {
            assert_eq!("Artist", frame.artist);
            assert_eq!("!@#$", frame.comment);
            assert_eq!("1", frame.track);
            assert_eq!("137", frame.genre);
        },
        _ => ()
    }
}

Example: reading V2 frame.

``rust use rtag::frame::*; use rtag::metadata::Unit; use rtag::metadata::MetadataReader;

for m in MetadataReader::new("./test-resources/240-pcnt.mp3").unwrap() { match m { Unit::FrameV2(head, FrameBody::PCNT(frame)) => { assert_eq!(256, frame.counter); }, _ => () } }

Example: modifying a frame.

``rust use std::fs; use rtag::frame::*; use rtag::metadata::Unit; use rtag::metadata::MetadataReader; use rtag::metadata::MetadataWriter;

let path = "./test-resources/240.test.mp3"; fs::copy("./test-resources/240.mp3", path).unwrap();

let new_data = MetadataReader::new(path) .unwrap() .fold(Vec::new(), |mut vec, unit| { if let Unit::FrameV2(frame_head, frame_body) = unit { let new_frame_body = if let FrameBody::TALB(ref frame) = frame_body { let mut new_frame = frame.clone(); new_frame.text = "Album!".to_string(); FrameBody::TALB(new_frame) } else { frame_body.clone() };

        vec.push(Unit::FrameV2(frame_head, new_frame_body));
    } else {
        vec.push(unit);
    }

    vec
});

let writer = MetadataWriter::new(path).unwrap(); let _ = writer.write(new_data, false); let _ = fs::remove_file(path).unwrap(); ``

Example: rewriting all the frame to version 4.

``rust use std::fs; use rtag::frame::*; use rtag::metadata::Unit; use rtag::metadata::MetadataReader; use rtag::metadata::MetadataWriter;

let path = "./test-resources/v2.2.test.mp3"; fs::copy("./test-resources/v2.2.mp3", path).unwrap();

let frames2_2 = MetadataReader::new(path).unwrap().collect::<Vec>(); let _ = MetadataWriter::new(path).unwrap().write(frames2_2, true); let i = MetadataReader::new(path) .unwrap() .filter(|unit| match unit { &Unit::FrameV2(FrameHeader::V22(_), _) => true, _ => false, });

assert_eq!(i.count(), 0);

let i = MetadataReader::new(path) .unwrap() .filter(|unit| match unit { &Unit::FrameV2(FrameHeader::V24(_), _) => true, _ => false, });

assert_eq!(i.count(), 5); let _ = fs::remove_file(path).unwrap(); ``

Example: Looking into frame without property name of frame.

``rust se rtag::frame::*; se rtag::metadata::{Unit, MetadataReader};

or m in MetadataReader::new("./test-resources/240.mp3").unwrap() { match m { Unit::FrameV2(_, ref frame) => {

       let _ = frame.to_map(); // frame to map

       frame.inside(|key, value| {
           println!("{}: {}", key, value);
           
           true // continue or not
       });
   },
   _ => {}

}

rtag 0.3.5

Example: Looking into frame without property name of frame.