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package db
import (
"bytes"
"encoding/json"
"fmt"
"net/url"
"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(data url.Values) error {
// set new UUID for upload
data.Set("uuid", uuid.NewV4().String())
// create slug based on filename and timestamp/updated fields
slug := data.Get("name")
slug, err := checkSlugForDuplicate(slug)
if err != nil {
return err
}
data.Set("slug", slug)
ts := fmt.Sprintf("%d", time.Now().Unix()*1000)
data.Set("timestamp", ts)
data.Set("updated", ts)
// store in database
err = store.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucketIfNotExists([]byte("__uploads"))
if err != nil {
return err
}
// get sequential ID for item
id, err := b.NextSequence()
if err != nil {
return err
}
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
}
err = b.Put([]byte(data.Get("id")), j)
if err != nil {
return err
}
return nil
})
if err != nil {
return err
}
// add slug to __contentIndex for lookup
return store.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucketIfNotExists([]byte("__contentIndex"))
if err != nil {
return err
}
k := []byte(data.Get("slug"))
v := []byte(fmt.Sprintf("%s:%s", "__uploads", data.Get("id")))
err = b.Put(k, v)
if err != nil {
return err
}
return 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 := []byte(parts[1])
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
}
target := b.Get([]byte(slug))
if target == nil {
return fmt.Errorf("no value for target in %s", "__contentIndex")
}
j, err := Upload(string(target))
if err != nil {
return err
}
_, err = val.Write(j)
return err
})
return val.Bytes(), err
}
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