446 lines
11 KiB
Go
446 lines
11 KiB
Go
package music
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import (
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"strings"
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"time"
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"arimelody.me/arimelody.me/api/v1/admin"
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"github.com/jmoiron/sqlx"
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)
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type ReleaseType string
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const (
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Single ReleaseType = "Single"
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Album ReleaseType = "Album"
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EP ReleaseType = "EP"
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Compilation ReleaseType = "Compilation"
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)
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type Release struct {
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ID string `json:"id"`
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Title string `json:"title"`
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Description string `json:"description"`
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ReleaseType ReleaseType `json:"type"`
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ReleaseDate time.Time `json:"releaseDate"`
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Artwork string `json:"artwork"`
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Buyname string `json:"buyname"`
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Buylink string `json:"buylink"`
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Links []Link `json:"links"`
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Credits []Credit `json:"credits"`
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Tracks []Track `json:"tracks"`
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}
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var Releases []Release;
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// GETTERS
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func (release Release) GetID() string {
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return release.ID
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}
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func (release Release) GetTitle() string {
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return release.Title
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}
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func (release Release) GetDescription() string {
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return release.Description
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}
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func (release Release) GetType() ReleaseType {
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return release.ReleaseType
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}
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func (release Release) GetReleaseDate() time.Time {
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return release.ReleaseDate
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}
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func (release Release) GetArtwork() string {
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if release.Artwork == "" {
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return "/img/default-cover-art.png"
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}
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return release.Artwork
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}
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func (release Release) GetBuyName() string {
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return release.Buyname
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}
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func (release Release) GetBuyLink() string {
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return release.Buylink
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}
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func (release Release) GetLinks() []Link {
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return release.Links
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}
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func (release Release) GetCredits() []Credit {
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return release.Credits
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}
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func (release Release) GetTracks() []Track {
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return release.Tracks
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}
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// SETTERS
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func (release Release) SetID(id string) error {
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// TODO: update DB
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release.ID = id
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return nil
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}
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func (release Release) SetTitle(title string) error {
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// TODO: update DB
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release.Title = title
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return nil
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}
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func (release Release) SetDescription(description string) error {
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// TODO: update DB
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release.Description = description
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return nil
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}
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func (release Release) SetType(releaseType ReleaseType) error {
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// TODO: update DB
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release.ReleaseType = releaseType
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return nil
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}
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func (release Release) SetReleaseDate(releaseDate time.Time) error {
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// TODO: update DB
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release.ReleaseDate = releaseDate
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return nil
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}
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func (release Release) SetArtwork(artwork string) error {
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// TODO: update DB
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release.Artwork = artwork
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return nil
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}
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func (release Release) SetBuyName(buyname string) error {
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// TODO: update DB
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release.Buyname = buyname
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return nil
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}
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func (release Release) SetBuyLink(buylink string) error {
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// TODO: update DB
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release.Buylink = buylink
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return nil
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}
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func (release Release) SetLinks(links []Link) error {
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// TODO: update DB
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release.Links = links
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return nil
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}
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func (release Release) SetCredits(credits []Credit) error {
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// TODO: update DB
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release.Credits = credits
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return nil
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}
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func (release Release) SetTracks(tracks []Track) error {
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// TODO: update DB
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release.Tracks = tracks
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return nil
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}
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// MISC
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func GetRelease(id string) *Release {
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for _, release := range Releases {
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if release.GetID() == id {
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return &release
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}
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}
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return nil
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}
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func (release Release) PrintReleaseDate() string {
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return release.ReleaseDate.Format("02 January 2006")
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}
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func (release Release) GetReleaseYear() int {
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return release.ReleaseDate.Year()
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}
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func (release Release) IsSingle() bool {
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return len(release.Tracks) == 1;
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}
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func (release Release) IsReleased() bool {
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return release.ReleaseDate.Before(time.Now())
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}
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func (release Release) GetUniqueArtists(only_primary bool) []Artist {
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var artists = []Artist{}
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for _, credit := range release.Credits {
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if only_primary && !credit.Primary {
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continue
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}
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exists := false
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for _, a := range artists {
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if a.ID == credit.Artist.ID {
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exists = true
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break
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}
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}
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if exists {
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continue
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}
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artists = append(artists, *credit.Artist)
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}
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return artists
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}
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func (release Release) GetUniqueArtistNames(only_primary bool) []string {
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var names = []string{}
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for _, artist := range release.GetUniqueArtists(only_primary) {
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names = append(names, artist.GetName())
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}
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return names
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}
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func (release Release) PrintArtists(only_primary bool, ampersand bool) string {
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names := release.GetUniqueArtistNames(only_primary)
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if len(names) == 0 {
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return "Unknown Artist"
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} else if len(names) == 1 {
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return names[0]
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}
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if ampersand {
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res := strings.Join(names[:len(names)-1], ", ")
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res += " & " + names[len(names)-1]
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return res
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} else {
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return strings.Join(names[:], ", ")
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}
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}
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// DATABASE
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func (release Release) PushToDB(db *sqlx.DB) error {
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// fmt.Printf("Pushing release [%s] to database...", release.ID)
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tx, err := db.Begin()
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to initiate transaction: %s", err))
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}
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_, err = tx.Exec(
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"INSERT INTO musicreleases (id, title, description, type, release_date, artwork, buyname, buylink) "+
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"VALUES ($1, $2, $3, $4, $5, $6, $7, $8) "+
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"ON CONFLICT (id) "+
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"DO UPDATE SET title=$2, description=$3, type=$4, release_date=$5, artwork=$6, buyname=$7, buylink=$8",
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release.ID,
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release.Title,
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release.Description,
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release.ReleaseType,
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release.ReleaseDate.Format("2-Jan-2006"),
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release.Artwork,
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release.Buyname,
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release.Buylink,
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)
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for _, link := range release.Links {
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_, err = tx.Exec(
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"INSERT INTO musiclinks (release, name, url) "+
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"VALUES ($1, $2, $3) "+
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"ON CONFLICT (release, name) "+
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"DO UPDATE SET url=$3 ",
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release.ID,
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link.Name,
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link.URL,
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)
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to add music link to transaction: %s", err))
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}
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}
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for _, credit := range release.Credits {
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_, err = tx.Exec(
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"INSERT INTO musiccredits (release, artist, role, is_primary) "+
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"VALUES ($1, $2, $3, $4) "+
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"ON CONFLICT (release, artist) "+
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"DO UPDATE SET role=$3, is_primary=$4",
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release.ID,
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credit.Artist.ID,
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credit.Role,
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credit.Primary,
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)
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to add music credit to transaction: %s", err))
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}
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}
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for _, track := range release.Tracks {
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_, err = tx.Exec(
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"INSERT INTO musictracks (release, number, title, description, lyrics, preview_url) "+
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"VALUES ($1, $2, $3, $4, $5, $6) "+
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"ON CONFLICT (release, number) "+
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"DO UPDATE SET title=$3, description=$4, lyrics=$5, preview_url=$6",
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release.ID,
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track.Number,
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track.Title,
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track.Description,
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track.Lyrics,
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track.PreviewURL,
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)
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to add music track to transaction: %s", err))
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}
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}
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err = tx.Commit()
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to commit transaction: %s", err))
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}
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// fmt.Printf("done!\n")
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return nil
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}
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func (release Release) DeleteFromDB(db *sqlx.DB) error {
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// this probably doesn't need to be a transaction;
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// i just felt like making it one
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tx, err := db.Begin()
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to initiate transaction: %s", err))
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}
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_, err = tx.Exec("DELETE FROM musicreleases WHERE id=$1", release.ID)
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err = tx.Commit()
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to commit transaction: %s", err))
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}
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return nil
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}
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func PullAllReleases(db *sqlx.DB) ([]Release, error) {
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releases := []Release{}
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rows, err := db.Query("SELECT id, title, description, type, release_date, artwork, buyname, buylink FROM musicreleases")
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if err != nil {
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return nil, err
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}
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for rows.Next() {
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var release = Release{}
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err = rows.Scan(
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&release.ID,
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&release.Title,
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&release.Description,
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&release.ReleaseType,
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&release.ReleaseDate,
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&release.Artwork,
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&release.Buyname,
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&release.Buylink,
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)
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if err != nil {
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fmt.Printf("Error while pulling a release: %s\n", err)
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continue
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}
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release.Credits, err = PullReleaseCredits(db, release.ID)
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if err != nil {
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fmt.Printf("Failed to pull credits for %s: %v\n", release.ID, err)
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}
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release.Links, err = PullReleaseLinks(db, release.ID)
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if err != nil {
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fmt.Printf("Failed to pull links for %s: %v\n", release.ID, err)
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}
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release.Tracks, err = PullReleaseTracks(db, release.ID)
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if err != nil {
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return nil, errors.New(fmt.Sprintf("error pulling tracks for %s: %v\n", release.ID, err))
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}
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releases = append(releases, release)
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}
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return releases, nil
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}
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// HTTP HANDLERS
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func ServeRelease() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path == "/" {
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http.NotFound(w, r)
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return
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}
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releaseID := r.URL.Path[1:]
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var release = GetRelease(releaseID)
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if release == nil {
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http.NotFound(w, r)
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return
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}
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// only allow authorised users to view unreleased releases
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authorised := r.Context().Value("role") != nil && r.Context().Value("role") == "admin"
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if !release.IsReleased() && !authorised {
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admin.MustAuthorise(ServeRelease()).ServeHTTP(w, r)
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return
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}
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jsonBytes, err := json.Marshal(release)
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if err != nil {
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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return
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}
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w.Header().Add("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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w.Write(jsonBytes)
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})
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}
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func PostRelease() http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.NotFound(w, r)
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return
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}
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var release Release
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err := json.NewDecoder(r.Body).Decode(&release)
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if err != nil {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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if GetRelease(release.ID) != nil {
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http.Error(w, fmt.Sprintf("Release %s already exists", release.ID), http.StatusBadRequest)
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return
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}
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Releases = append(Releases, release)
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jsonBytes, err := json.Marshal(release)
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w.Header().Add("Content-Type", "application/json")
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w.WriteHeader(http.StatusCreated)
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w.Write(jsonBytes)
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})
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}
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