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package db
import (
"bytes"
"encoding/binary"
"encoding/json"
"fmt"
"log"
"net/url"
"strconv"
"strings"
"time"
"github.com/ponzu-cms/ponzu/system/item"
"github.com/boltdb/bolt"
"github.com/gorilla/schema"
uuid "github.com/satori/go.uuid"
)
// SetUpload stores information about files uploaded to the system
func SetUpload(target string, data url.Values) (int, error) {
parts := strings.Split(target, ":")
if parts[0] != "__uploads" {
return 0, fmt.Errorf("cannot call SetUpload with target type: %s", parts[0])
}
pid := parts[1]
if data.Get("uuid") == "" ||
data.Get("uuid") == (uuid.UUID{}).String() {
// set new UUID for upload
data.Set("uuid", uuid.NewV4().String())
}
if data.Get("slug") == "" {
// create slug based on filename and timestamp/updated fields
slug := data.Get("name")
slug, err := checkSlugForDuplicate(slug)
if err != nil {
return 0, err
}
data.Set("slug", slug)
}
ts := fmt.Sprintf("%d", time.Now().Unix()*1000)
if data.Get("timestamp") == "" {
data.Set("timestamp", ts)
}
data.Set("updated", ts)
// store in database
var id uint64
var err error
err = store.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucketIfNotExists([]byte("__uploads"))
if err != nil {
return err
}
if pid == "-1" {
// get sequential ID for item
id, err = b.NextSequence()
if err != nil {
return err
}
data.Set("id", fmt.Sprintf("%d", id))
} else {
uid, err := strconv.ParseInt(pid, 10, 64)
if err != nil {
return err
}
id = uint64(uid)
data.Set("id", fmt.Sprintf("%d", id))
}
file := &item.FileUpload{}
dec := schema.NewDecoder()
dec.SetAliasTag("json") // allows simpler struct tagging when creating a content type
dec.IgnoreUnknownKeys(true) // will skip over form values submitted, but not in struct
err = dec.Decode(file, data)
if err != nil {
return err
}
// marshal data to json for storage
j, err := json.Marshal(file)
if err != nil {
return err
}
uploadKey, err := key(data.Get("id"))
if err != nil {
return err
}
err = b.Put(uploadKey, j)
if err != nil {
return err
}
// add slug to __contentIndex for lookup
b, err = tx.CreateBucketIfNotExists([]byte("__contentIndex"))
if err != nil {
return err
}
k := []byte(data.Get("slug"))
v := []byte(fmt.Sprintf("__uploads:%d", id))
err = b.Put(k, v)
if err != nil {
return err
}
return nil
})
if err != nil {
return 0, err
}
return int(id), nil
}
// Upload returns the value for an upload by its target (__uploads:{id})
func Upload(target string) ([]byte, error) {
val := &bytes.Buffer{}
parts := strings.Split(target, ":")
if len(parts) < 2 {
return nil, fmt.Errorf("invalid target for upload: %s", target)
}
id, err := key(parts[1])
if err != nil {
return nil, err
}
err = store.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("__uploads"))
if b == nil {
return bolt.ErrBucketNotFound
}
j := b.Get(id)
_, err := val.Write(j)
return err
})
return val.Bytes(), err
}
// UploadBySlug returns the value for an upload by its slug
func UploadBySlug(slug string) ([]byte, error) {
val := &bytes.Buffer{}
// get target from __contentIndex or return nil if not exists
err := store.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("__contentIndex"))
if b == nil {
return bolt.ErrBucketNotFound
}
v := b.Get([]byte(slug))
if v == nil {
return fmt.Errorf("no value for key '%s' in __contentIndex", slug)
}
j, err := Upload(string(v))
if err != nil {
return err
}
_, err = val.Write(j)
return err
})
return val.Bytes(), err
}
// UploadAll returns a [][]byte containing all upload data from the system
func UploadAll() [][]byte {
var uploads [][]byte
err := store.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte("__uploads"))
if b == nil {
return bolt.ErrBucketNotFound
}
numKeys := b.Stats().KeyN
uploads = make([][]byte, 0, numKeys)
return b.ForEach(func(k, v []byte) error {
uploads = append(uploads, v)
return nil
})
})
if err != nil {
log.Println("Error in UploadAll:", err)
return nil
}
return uploads
}
func key(sid string) ([]byte, error) {
id, err := strconv.Atoi(sid)
if err != nil {
return nil, err
}
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, uint64(id))
return b, err
}
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