id3ed/README.md

# ∙ ID3ED (ID3 - Encoder - Decoder)
## ⚬ Library for encoding/decoding ID3 tags

---

# Status of the package

**ID3v1**. can:

- read
- write

**ID3v1 Enhanced**. can:

- read
- write

**ID3v2**. can: 

- read


---

# ∙ Installation 

To download package source:
```
go get github.com/Unbewohnte/id3ed/...
```
will be deprecated in 1.17 as far as I know

To donwload and compile package:
```
go install github.com/Unbewohnte/id3ed/...
```

---

# ∙ Examples

## ⚬ Directly reading ID3v1
```
package main

import(
    "fmt"
    id3v1 "github.com/Unbewohnte/id3ed/v1"
)

func main() {
    mp3file, err := os.Open("/path/to/mp3/myMP3.mp3")
    if err != nil {
        panic(err)
    }

    // extract ID3v1.1 tag 
    mp3tag, err := id3v1.Readv1Tag(mp3file)
    if err != nil {
       panic(err)
    }

    // print the whole tag
    fmt.Printf("%+v",mp3tag)

    // get certain fields
    songname := mp3tag.SongName

    genre := mp3tag.Genre

    // etc.
}
```

## ⚬ Directly writing ID3v1
```
package main

import(
    "fmt"
    id3v1 "github.com/Unbewohnte/id3ed/v1"
)

func main() {
	f, err := os.OpenFile("/path/to/file/myfile.mp3",os.O_WRONLY, os.ModePerm)
	if err != nil {
		panic(err)
	}
	defer f.Close()

    // create your tags struct
	tag := &id3v1.ID3v1Tag{
            SongName: "mysong",
            Artist:   "me",
            Album:    "my album",
            Year:     2021,
            Comment:  "Cool song",
            Track:    1,
            Genre:    "Christian Gangsta Rap", // for list of genres see: "./v1/genres.go"
	}

    // write tags to file
	err = tag.WriteToFile(f)
	if err != nil {
		panic(err)
	}
}
```

## ⚬ Directly reading ID3v2
```
package main

import(
    "fmt"
    id3v2 "github.com/Unbewohnte/id3ed/v2"
)

func main() {
    mp3file, err := os.Open("/path/to/mp3/myMP3.mp3")
    if err != nil {
        panic(err)
    }

    // extract ID3v2 tag 
    mp3tag, err := id3v2.Readv2Tag(mp3file)
    if err != nil {
       panic(err)
    }

    // you can get some essential frames` contents from getters
    title := tag.Title() // string
    
    // or get direct frame by id
    commentFrame := tag.GetFrame("COMM") // *Frame 
    // commentFrame.(Header.(...)|Contents)

    // etc.
}

```

## ⚬ Easier way to read/write tags

```
package main

import(
    "fmt"
    "github.com/Unbewohnte/id3ed"
    id3v1 "github.com/Unbewohnte/id3ed/v1"
)

func main() {
    f, err := id3ed.Open("/path/to/mp3/myMP3.mp3")
    if err != nil {
        panic(err)
    }
    
    // reading and writing tags is easy and done by one struct !
    if f.ContainsID3v2 {
        for_, frame := range f.ID3v2Tag.Frames{
           fmt.Printf("%s\n", frame.Header.ID)
        }
    }

    tag := &id3v1.ID3v1Tag{
            SongName: "mysong",
            Artist:   "me",
            Album:    "my album",
            Year:     2021,
            Comment:  "Cool song",
            Track:    1,
            Genre:    "Christian Gangsta Rap", // for list of genres see: "./v1/genres.go"
	}

    err = f.WriteID3v1(tag)
    if err != nil {
        panic(err)
    }
    
    // etc. 
}
```

---

# ∙ Testing

To test everything
```
go test ./...
```
or
```
go test -v ./...
```
to get a verbose output

OR

```
go test ./package_name_here
```
to test a specific package

---

# ∙ License

[MIT LICENSE](https://github.com/Unbewohnte/id3ed/blob/main/LICENSE)

# ∙ Note

This is **NOT** a fully tested and it is **NOT** a flawlessly working and edge-cases-covered package.

I work on it alone and I am **NOT** a professional who knows what he does.

Please, use with caution !