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types.go
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types.go
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// Copyright 2019-2020 Sherman Perry
// This file is part of Kobo UNCaGED.
// Kobo UNCaGED is free software: you can redistribute it and/or modify
// it under the terms of the Affero GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Kobo UNCaGED is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with Kobo UNCaGED. If not, see <https://www.gnu.org/licenses/>.
package device
import (
"bufio"
"fmt"
"os"
"strings"
"sync"
"github.com/bamiaux/rez"
"github.com/godbus/dbus/v5"
"github.com/julienschmidt/httprouter"
"github.com/pgaskin/koboutils/v2/kobo"
"github.com/shermp/UNCaGED/uc"
"github.com/unrolled/render"
)
type cidPrefix string
type firmwareVersion string
// KuOptions contains some options that are required
type KuOptions struct {
PreferSDCard bool `json:"preferSDCard"`
PreferKepub bool `json:"preferKepub"`
EnableDebug bool `json:"enableDebug"`
Thumbnail thumbnailOption `json:"thumbnail"`
LibOptions map[string]KuLibOptions `json:"libOptions"`
DirectConnIndex int `json:"directConnIndex"`
DirectConn []uc.CalInstance `json:"directConn"`
}
// KuLibOptions contains per-library options
type KuLibOptions struct {
SubtitleColumn string `json:"subtitleColumn"`
}
type webUIinfo struct {
KUVersion string `json:"kuVersion"`
StorageType string `json:"storageType"`
ScreenDPI int `json:"screenDPI"`
ExitPath string `json:"exitPath"`
DisconnectPath string `json:"disconnectPath"`
AuthPath string `json:"authPath"`
SSEPath string `json:"ssePath"`
ConfigPath string `json:"configPath"`
InstancePath string `json:"instancePath"`
LibInfoPath string `json:"libInfoPath"`
}
type webConfig struct {
Opts KuOptions `json:"opts"`
err error
}
type webLibOpts struct {
CurrSel int `json:"currSel"`
SubtitleFields []string `json:"subtitleFields"`
}
// WebMsg is used to send messages to the web client
type WebMsg struct {
ShowMessage string
Progress int
GetPassword bool
GetCalInstance bool
GetLibInfo bool
Finished string
}
type calPassCache map[string]*calPassword
type calPassword struct {
Attempts int `json:"attempts"`
LibName string `json:"libName"`
Password string `json:"password"`
}
// Kobo contains the variables and methods required to use
// the UNCaGED library
type Kobo struct {
KuVers string
Device kobo.Device
fw firmwareVersion
KuConfig *KuOptions
DBRootDir string
BKRootDir string
ContentIDprefix cidPrefix
UseSDCard bool
MetadataMap map[string]uc.CalibreBookMeta
UpdatedMetadata map[string]struct{}
BooksInDB map[string]struct{}
SeriesIDMap map[string]string
LibInfo uc.CalibreLibraryInfo
PassCache calPassCache
DriveInfo uc.DeviceInfo
Wg *sync.WaitGroup
mux *httprouter.Router
rend *render.Render
webInfo *webUIinfo
replSQLWriter *sqlWriter
ndbConn *dbus.Conn
ndbObj dbus.BusObject
calInstances []uc.CalInstance
useNDB bool
FinishedMsg string
BrowserOpen bool
doneChan chan bool
startChan chan webConfig
MsgChan chan WebMsg
AuthChan chan *calPassword
exitChan chan bool
UCExitChan chan<- bool
calInstChan chan uc.CalInstance
viewSignal chan *dbus.Signal
}
// MetaIterator Kobo UNCaGED to lazy load book metadata
type MetaIterator struct {
k *Kobo
cidList []string
cidIndex int
}
// NewMetaIter creates a new MetaIterator for use
func NewMetaIter(k *Kobo) *MetaIterator {
iter := MetaIterator{k: k, cidIndex: -1}
return &iter
}
// Add a client ID to the iterator
func (m *MetaIterator) Add(cid string) {
m.cidList = append(m.cidList, cid)
}
// Next advances the iterator
func (m *MetaIterator) Next() bool {
m.cidIndex++
if m.cidIndex < len(m.cidList) {
return true
}
return false
}
// Count gets the number items in the iterator
func (m *MetaIterator) Count() int {
return len(m.cidList)
}
// Get the metadata of the current iteration
func (m *MetaIterator) Get() (uc.CalibreBookMeta, error) {
if m.Count() > 0 && m.cidIndex >= 0 {
if md, exists := m.k.MetadataMap[m.cidList[m.cidIndex]]; exists {
return md, nil
}
}
return uc.CalibreBookMeta{}, fmt.Errorf("no metadata to get")
}
type uncagedPassword struct {
currPassIndex int
passwordList []string
}
type thumbnailOption struct {
GenerateLevel string `json:"generateLevel"`
ResizeAlgorithm string `json:"resizeAlgorithm"`
JpegQuality int `json:"jpegQuality"`
rezFilter rez.Filter
}
const (
generateAll string = "all"
generatePartial string = "partial"
generateNone string = "none"
)
const (
//resizeNN string = "nearest"
resizeBL string = "bilinear"
resizeBC string = "bicubic"
resizeLC2 string = "lanczos2"
resizeLC3 string = "lanczos3"
)
func (to *thumbnailOption) Validate() {
switch strings.ToLower(to.GenerateLevel) {
case generateAll, generatePartial, generateNone:
to.GenerateLevel = strings.ToLower(to.GenerateLevel)
default:
to.GenerateLevel = generateAll
}
switch strings.ToLower(to.ResizeAlgorithm) {
case resizeBL, resizeBC, resizeLC2, resizeLC3:
to.ResizeAlgorithm = strings.ToLower(to.ResizeAlgorithm)
default:
to.ResizeAlgorithm = resizeBC
}
if to.JpegQuality < 1 || to.JpegQuality > 100 {
to.JpegQuality = 90
}
}
func (to *thumbnailOption) SetRezFilter() {
switch to.ResizeAlgorithm {
case resizeBL:
to.rezFilter = rez.NewBilinearFilter()
case resizeBC:
to.rezFilter = rez.NewBicubicFilter()
case resizeLC2:
to.rezFilter = rez.NewLanczosFilter(2)
case resizeLC3:
to.rezFilter = rez.NewLanczosFilter(3)
default:
to.rezFilter = rez.NewBicubicFilter()
}
}
type sqlWriter struct {
sqlFile *os.File
sqlBuffWriter *bufio.Writer
}
func newSQLWriter(path string) (*sqlWriter, error) {
var err error
s := &sqlWriter{}
if s.sqlFile, err = os.Create(path); err != nil {
return nil, err
}
s.sqlBuffWriter = bufio.NewWriter(s.sqlFile)
return s, nil
}
func (s *sqlWriter) writeBegin() {
s.sqlBuffWriter.WriteString("BEGIN;\n")
}
func (s *sqlWriter) writeCommit() {
s.sqlBuffWriter.WriteString("COMMIT;\n")
}
func (s *sqlWriter) writeQuery(query string) {
s.sqlBuffWriter.WriteString(query)
// Make sure our query always ends with a terminating ';'
if !strings.HasSuffix(query, ";") {
s.sqlBuffWriter.WriteRune(';')
}
s.sqlBuffWriter.WriteRune('\n')
}
func (s *sqlWriter) close() {
defer s.sqlFile.Close()
s.sqlBuffWriter.Flush()
}