doodle/pkg/level/fmt_readwrite.go
Noah Petherbridge 35a89e5dbe WASM: Store User Files in localStorage
* In WASM build, user levels and doodads are written to localStorage
  using their userdir path as keys (".config/levels/test.level")
* LoadFile() and WriteFile() for both Levels and Doodads interact with
  the localStorage for WASM build instead of filesystem for desktop.
* userdir.ListLevels() and ListDoodads() for WASM scan the localStorage
  keys for file names.
* userdir.ResolvePath() now works for WASM (previously was dummied out),
  checks for the file in localStorage.
2019-06-27 15:59:18 -07:00

131 lines
3.0 KiB
Go

package level
import (
"errors"
"fmt"
"io/ioutil"
"runtime"
"strings"
"git.kirsle.net/apps/doodle/pkg/bindata"
"git.kirsle.net/apps/doodle/pkg/branding"
"git.kirsle.net/apps/doodle/pkg/enum"
"git.kirsle.net/apps/doodle/pkg/filesystem"
"git.kirsle.net/apps/doodle/pkg/log"
"git.kirsle.net/apps/doodle/pkg/userdir"
"git.kirsle.net/apps/doodle/pkg/wasm"
)
// ListSystemLevels returns a list of built-in levels.
func ListSystemLevels() ([]string, error) {
var names = []string{}
// Add the levels embedded inside the binary.
if levels, err := bindata.AssetDir("assets/levels"); err == nil {
names = append(names, levels...)
}
// WASM
if runtime.GOOS == "js" {
// Return just the embedded ones, no filesystem access.
return names, nil
}
// Read filesystem for system levels.
files, err := ioutil.ReadDir(filesystem.SystemLevelsPath)
for _, file := range files {
name := file.Name()
if strings.HasSuffix(strings.ToLower(name), enum.DoodadExt) {
names = append(names, name)
}
}
return names, err
}
// LoadFile reads a level file from disk, checking a few locations.
func LoadFile(filename string) (*Level, error) {
if !strings.HasSuffix(filename, enum.LevelExt) {
filename += enum.LevelExt
}
// Search the system and user paths for this level.
filename, err := filesystem.FindFile(filename)
if err != nil {
return nil, err
}
// Do we have the file in bindata?
if jsonData, err := bindata.Asset(filename); err == nil {
log.Info("loaded from embedded bindata")
return FromJSON(filename, jsonData)
}
// WASM: try the file from localStorage or HTTP ajax request.
if runtime.GOOS == "js" {
if result, ok := wasm.GetSession(filename); ok {
log.Info("recall level data from localStorage")
return FromJSON(filename, []byte(result))
}
// Ajax request.
jsonData, err := wasm.HTTPGet(filename)
if err != nil {
return nil, err
}
return FromJSON(filename, jsonData)
}
// Try the binary format.
if level, err := LoadBinary(filename); err == nil {
return level, nil
} else {
log.Warn(err.Error())
}
// Then the JSON format.
if level, err := LoadJSON(filename); err == nil {
return level, nil
} else {
log.Warn(err.Error())
}
return nil, errors.New("invalid file type")
}
// WriteFile saves a level to disk in the user's config directory.
func (m *Level) WriteFile(filename string) error {
if !strings.HasSuffix(filename, enum.LevelExt) {
filename += enum.LevelExt
}
// Set the version information.
m.Version = 1
m.GameVersion = branding.Version
bin, err := m.ToJSON()
if err != nil {
return err
}
// Save it to their profile directory.
filename = userdir.LevelPath(filename)
log.Info("Write Level: %s", filename)
// WASM: place in localStorage.
if runtime.GOOS == "js" {
log.Info("wasm: write %s to localStorage", filename)
wasm.SetSession(filename, string(bin))
return nil
}
// Desktop: write to disk.
err = ioutil.WriteFile(filename, bin, 0644)
if err != nil {
return fmt.Errorf("level.WriteFile: %s", err)
}
return nil
}