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gomuks.go
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gomuks.go
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// gomuks - A terminal Matrix client written in Go.
// Copyright (C) 2020 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"errors"
"fmt"
"os"
"os/signal"
"path/filepath"
"runtime"
"strings"
"syscall"
"time"
"maunium.net/go/gomuks/config"
"maunium.net/go/gomuks/debug"
ifc "maunium.net/go/gomuks/interface"
"maunium.net/go/gomuks/matrix"
)
// Information to find out exactly which commit gomuks was built from.
// These are filled at build time with the -X linker flag.
var (
Tag = "unknown"
Commit = "unknown"
BuildTime = "unknown"
)
var (
// Version is the version number of gomuks. Changed manually when making a release.
Version = "0.3.1"
// VersionString is the gomuks version, plus commit information. Filled in init() using the build-time values.
VersionString = ""
)
func init() {
if len(Tag) > 0 && Tag[0] == 'v' {
Tag = Tag[1:]
}
if Tag != Version {
suffix := ""
if !strings.HasSuffix(Version, "+dev") {
suffix = "+dev"
}
if len(Commit) > 8 {
Version = fmt.Sprintf("%s%s.%s", Version, suffix, Commit[:8])
} else {
Version = fmt.Sprintf("%s%s.unknown", Version, suffix)
}
}
VersionString = fmt.Sprintf("gomuks %s (%s with %s)", Version, BuildTime, runtime.Version())
}
// Gomuks is the wrapper for everything.
type Gomuks struct {
ui ifc.GomuksUI
matrix *matrix.Container
config *config.Config
stop chan bool
}
// NewGomuks creates a new Gomuks instance with everything initialized,
// but does not start it.
func NewGomuks(uiProvider ifc.UIProvider, configDir, dataDir, cacheDir, downloadDir string) *Gomuks {
gmx := &Gomuks{
stop: make(chan bool, 1),
}
gmx.config = config.NewConfig(configDir, dataDir, cacheDir, downloadDir)
gmx.ui = uiProvider(gmx)
gmx.matrix = matrix.NewContainer(gmx)
gmx.config.LoadAll()
gmx.ui.Init()
debug.OnRecover = gmx.ui.Finish
return gmx
}
func (gmx *Gomuks) Version() string {
return Version
}
// Save saves the active session and message history.
func (gmx *Gomuks) Save() {
gmx.config.SaveAll()
}
// StartAutosave calls Save() every minute until it receives a stop signal
// on the Gomuks.stop channel.
func (gmx *Gomuks) StartAutosave() {
defer debug.Recover()
ticker := time.NewTicker(time.Minute)
for {
select {
case <-ticker.C:
if gmx.config.AuthCache.InitialSyncDone {
gmx.Save()
}
case val := <-gmx.stop:
if val {
return
}
}
}
}
// Stop stops the Matrix syncer, the tview app and the autosave goroutine,
// then saves everything and calls os.Exit(0).
func (gmx *Gomuks) Stop(save bool) {
go gmx.internalStop(save)
}
func (gmx *Gomuks) internalStop(save bool) {
debug.Print("Disconnecting from Matrix...")
gmx.matrix.Stop()
debug.Print("Cleaning up UI...")
gmx.ui.Stop()
gmx.stop <- true
if save {
gmx.Save()
}
debug.Print("Exiting process")
os.Exit(0)
}
// Start opens a goroutine for the autosave loop and starts the tview app.
//
// If the tview app returns an error, it will be passed into panic(), which
// will be recovered as specified in Recover().
func (gmx *Gomuks) Start() {
err := gmx.matrix.InitClient(true)
if err != nil {
if errors.Is(err, matrix.ErrServerOutdated) {
_, _ = fmt.Fprintln(os.Stderr, strings.Replace(err.Error(), "homeserver", gmx.config.HS, 1))
_, _ = fmt.Fprintln(os.Stderr)
_, _ = fmt.Fprintf(os.Stderr, "See `%s --help` if you want to skip this check or clear all data.\n", os.Args[0])
os.Exit(4)
} else if strings.HasPrefix(err.Error(), "failed to check server versions") {
_, _ = fmt.Fprintln(os.Stderr, "Failed to check versions supported by server:", errors.Unwrap(err))
_, _ = fmt.Fprintln(os.Stderr)
_, _ = fmt.Fprintf(os.Stderr, "Modify %s if the server has moved.\n", filepath.Join(gmx.config.Dir, "config.yaml"))
_, _ = fmt.Fprintf(os.Stderr, "See `%s --help` if you want to skip this check or clear all data.\n", os.Args[0])
os.Exit(5)
} else {
panic(err)
}
}
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
go func() {
<-c
gmx.Stop(true)
}()
go gmx.StartAutosave()
if err = gmx.ui.Start(); err != nil {
panic(err)
}
}
// Matrix returns the MatrixContainer instance.
func (gmx *Gomuks) Matrix() ifc.MatrixContainer {
return gmx.matrix
}
// Config returns the Gomuks config instance.
func (gmx *Gomuks) Config() *config.Config {
return gmx.config
}
// UI returns the Gomuks UI instance.
func (gmx *Gomuks) UI() ifc.GomuksUI {
return gmx.ui
}