arimelody.me/music/controller/artist.go

package music

import (
	"arimelody.me/arimelody.me/music/model"
	"github.com/jmoiron/sqlx"
)

// DATABASE

func GetArtist(db *sqlx.DB, id string) (*model.Artist, error) {
	var artist = model.Artist{}

	err := db.Get(&artist, "SELECT * FROM artist WHERE id=$1", id)
	if err != nil {
		return nil, err
	}

	return &artist, nil
}

func GetAllArtists(db *sqlx.DB) ([]*model.Artist, error) {
	var artists = []*model.Artist{}

	err := db.Select(&artists, "SELECT * FROM artist")
	if err != nil {
		return nil, err
	}

	return artists, nil
}

func GetArtistsNotOnRelease(db *sqlx.DB, releaseID string) ([]*model.Artist, error) {
	var artists = []*model.Artist{}

	err := db.Select(&artists,
        "SELECT * FROM artist "+
        "WHERE id NOT IN "+
        "(SELECT artist FROM musiccredit WHERE release=$1)",
        releaseID)
	if err != nil {
		return nil, err
	}

	return artists, nil
}

func GetArtistCredits(db *sqlx.DB, artistID string) ([]*model.Credit, error) {
    type DBCredit struct {
        Release string
        Artist string
        Role string
        Primary bool `db:"is_primary"`
    }
    var dbCredits []DBCredit

    err := db.Select(&dbCredits, "SELECT * FROM musiccredit WHERE artist=$1", artistID)
	if err != nil {
		return nil, err
	}

    var credits []*model.Credit
    for _, credit := range dbCredits {
        credits = append(credits, &model.Credit{
            Release: model.Release{ ID: credit.Release },
            Artist: model.Artist{ ID: credit.Artist },
            Role: credit.Role,
            Primary: credit.Primary,
        })
    }

    return credits, nil
}

func CreateArtist(db *sqlx.DB, artist *model.Artist) error {
    _, err := db.Exec(
		"INSERT INTO artist (id, name, website, avatar) "+
        "VALUES ($1, $2, $3, $4)",
		artist.ID,
		artist.Name,
		artist.Website,
        artist.Avatar,
	)
    if err != nil {
        return err
    }
    
    return nil
}

func UpdateArtist(db *sqlx.DB, artist *model.Artist) error {
    _, err := db.Exec(
        "UPDATE artist "+
        "SET name=$2, website=$3, avatar=$4 "+
        "WHERE id=$1",
        artist.ID,
        artist.Name,
        artist.Website,
        artist.Avatar,
    )
    if err != nil {
        return err
    }

    return nil
}

func DeleteArtist(db *sqlx.DB, artist *model.Artist) error {
    _, err := db.Exec(
        "DELETE FROM artist "+
        "WHERE id=$1",
        artist.ID,
    )
    if err != nil {
        return err
    }

    return nil
}