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db.go
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db.go
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package main
import (
"errors"
"fmt"
"os"
"github.com/jinzhu/gorm"
_ "github.com/lib/pq"
)
type database struct {
db *gorm.DB
}
// DB is the object
var DB database
func initDB() {
dbURL := os.Getenv("DATABASE_URL")
if dbURL == "" {
rdsHost := os.Getenv("RDS_HOSTNAME")
rdsPort := os.Getenv("RDS_PORT")
rdsDbName := os.Getenv("RDS_DB_NAME")
rdsUsername := os.Getenv("RDS_USERNAME")
rdsPassword := os.Getenv("RDS_PASSWORD")
dbURL = fmt.Sprintf("postgres://%s:%s@%s:%s/%s", rdsUsername, rdsPassword, rdsHost, rdsPort, rdsDbName)
}
if dbURL == "" {
panic("DB env vars not found")
}
var err error
db, err := gorm.Open("postgres", dbURL)
db.LogMode(true)
if err != nil {
panic(err)
}
DB.db = db
fmt.Println("db connected")
}
func (db database) getMyMedia(pubKey string) []Media {
ms := []Media{}
db.db.Where("owner_pub_key = ?", pubKey).Find(&ms)
return ms
}
func (db database) getMediaWithDimensions() []Media {
ms := []Media{}
db.db.Where("width > 0 and height > 0").Find(&ms)
return ms
}
func (db database) getAllMedia() []Media {
ms := []Media{}
db.db.Find(&ms)
return ms
}
func (db database) getTemplates() []Media {
ms := []Media{}
db.db.Where("template = ?", true).Find(&ms)
return ms
}
func (db database) getMediaWithDimensionsByMuid(muid string) Media {
m := Media{}
db.db.Where("width > 0 and height > 0 and id = ?", muid).First(&m)
return m
}
func (db database) getTemplateByMuid(muid string) Media {
m := Media{}
db.db.Where("template = ? and id = ?", true, muid).First(&m)
return m
}
func (db database) getMyMediaByMUID(pubKey, muid string) Media {
m := Media{}
db.db.Where("owner_pub_key = ? and id = ?", pubKey, muid).First(&m)
return m
}
func (db database) getMediaByMUID(muid string) Media {
m := Media{}
db.db.Where("id = ?", muid).First(&m)
return m
}
func (db database) mediaPurchase(pubKey, muid string) Media {
if muid == "" {
return Media{}
}
row := db.db.Raw(`UPDATE media SET
total_buys = total_buys + 1,
total_sats = total_sats + price
WHERE (id = ? and owner_pub_key = ?)
RETURNING id,price,ttl`, muid, pubKey).Row()
m := Media{}
row.Scan(&m.ID, &m.Price, &m.TTL)
return m // if unsuccessful will return empty Media
}
func (db database) updateMedia(muid string, u map[string]interface{}) bool {
if muid == "" {
return false
}
db.db.Model(&Media{ID: muid}).Where("muid = ?", muid).Updates(u)
return true
}
func (db database) getOwner(muid string) string {
m := Media{}
db.db.Select("owner_pub_key").Where("id = ?", muid).First(&m)
return m.OwnerPubKey
}
var updatables = []string{
"name", "description", "price", "ttl", "tags", "nonce",
}
// check that update owner_pub_key does in fact throw error
func (db database) createMedia(m Media) (Media, error) {
if m.OwnerPubKey == "" {
return Media{}, errors.New("no pub key")
}
onConflict := "ON CONFLICT (id) DO UPDATE SET"
for i, u := range updatables {
onConflict = onConflict + fmt.Sprintf(" %s=EXCLUDED.%s", u, u)
if i < len(updatables)-1 {
onConflict = onConflict + ","
}
}
if m.Name == "" {
m.Name = "name"
}
if m.Description == "" {
m.Description = "description"
}
if m.Tags == nil {
m.Tags = []string{}
}
if err := db.db.Set("gorm:insert_option", onConflict).Create(&m).Error; err != nil {
fmt.Println(err)
return Media{}, err
}
// not working?
db.db.Exec(`UPDATE media SET tsv =
setweight(to_tsvector(name), 'A') ||
setweight(to_tsvector(description), 'B') ||
setweight(array_to_tsvector(tags), 'C')
WHERE id = '` + m.ID + "'")
return m, nil
}
func (db database) searchMedia(s string) []Media {
ms := []Media{}
if s == "" {
return ms
}
// set limit
db.db.Raw(
`SELECT id, owner_pub_key, name, description, price, ttl, filename, mime, size, ts_rank(tsv, q) as rank
FROM media, to_tsquery('` + s + `') q
WHERE tsv @@ q
ORDER BY rank DESC LIMIT 12;`).Find(&ms)
return ms
}