/
player.go
428 lines (368 loc) · 10.7 KB
/
player.go
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package piplayer
import (
"context"
"encoding/json"
"errors"
"html/template"
"log"
"net/http"
"os"
"os/exec"
"github.com/17xande/keylogger"
)
// Player2 represents the entire program. It's the shell that holds the
// components together. The other components are the Streamer, Playlist,
// and Remote
type Player2 interface {
Start(i Item)
Stop() error
Next() error
Previous() error
Listen(s chan string)
}
// Player is the object that renders images to the screen through omxplayer or chromium
type Player struct {
ConnViewer ConnectionWS
ConnControl ConnectionWS
Server *http.Server
// serveMux *http.ServeMux
api *APIHandler
// command *exec.Cmd
// pipeIn io.WriteCloser
playlist *Playlist
conf *Config
// running bool
// quitting bool
// status int
// quit chan error
browser Browser
keylogger *keylogger.KeyLogger
streamer Streamer
}
const (
// statusMenu = 1
// statusLive = 0
)
// Browser represents the chromium process that is used to display web pages and still images to the screen
type Browser struct {
command *exec.Cmd
running bool
ctxt *context.Context
cancel *context.CancelFunc
}
// var commandList = map[string]string{
// "speedIncrease": "1",
// "speedDecrease": "2",
// "rewind": "<",
// "fastForward": ">",
// "chapterPrevious": "i",
// "chapterNext": "o",
// "exit": "q",
// "quit": "q",
// "pauseResume": "p",
// "volumeDecrease": "-",
// "volumeIncrease": "+",
// "seekBack30": "\x1b[D",
// "seekForward30": "\x1b[C",
// "seekBack600": "\x1b[B",
// "seekForward600": "\x1b[A",
// }
// NewPlayer creates a new Player server *http.Server, router *mux.Router
func NewPlayer(api *APIHandler, conf *Config, keylogger *keylogger.KeyLogger) *Player {
p := Player{
api: api,
conf: conf,
keylogger: keylogger,
ConnViewer: NewConnWS(),
ConnControl: NewConnWS(),
// TODO: Make this a config setting.
streamer: &Chrome{
ConnViewer: &connWS{},
ConnControl: &connWS{},
},
}
var err error
p.playlist, err = NewPlaylist(&p, conf.Mount.Dir)
if err != nil {
log.Printf("error trying to create playlist. Bailing out:\n%v\n", err)
return nil
}
if api.debug {
log.Println("initializing remote")
}
// TODO: get context from caller?
go remoteRead(context.Background(), &p)
// Listen for websocket messages from the browser.
// go p.HandleWebSocketMessage()
return &p
}
// FirstRun starts the browser on a black screen and gets things going
func (p *Player) FirstRun() {
if p.api.test == "web" {
return
}
if p.api.debug {
log.Println("Starting browser on first run...")
}
if err := p.startBrowser(); err != nil {
log.Println("Error trying to start the browser:\n", err)
p.browser.running = false
}
if len(p.playlist.Items) == 0 {
log.Println("No items in current directory.")
return
}
}
// Start the file that will be played in the browser. Sends a message to the
// ConnViewer channel to be sent over the websocket.
func (p *Player) Start(w *http.ResponseWriter) {
// fileName, ok := p.api.message.Arguments["path"]
sIndex, ok := p.api.message.Arguments["index"]
if !ok {
handleAPIError(w, "No intem index or provided")
return
}
res := wsMessage{
Event: "start",
Message: sIndex,
Success: true,
}
send := p.ConnViewer.getChanSend()
send <- res
m := &resMessage{Success: true, Event: "StartRequestSent", Message: p.playlist.Current.Name()}
json.NewEncoder(*w).Encode(m)
}
// startBrowser starts Chromium browser, or Google Chrome with the relevant flags.
func (p *Player) startBrowser() error {
if p.browser.running {
return errors.New("error: Browser already running, cannot start another instance")
}
flags := []string{
"--window-size=1920,1080",
"--window-position=0,0",
"--kiosk",
"--incognito",
"--disable-infobars",
"--noerrdialogs",
"--no-first-run",
"--enable-experimental-web-platform-features",
"--javascript-harmony",
"--autoplay-policy=no-user-gesture-required",
"--remote-debugging-port=9222",
// Experimental gpu enabling flags for higher video playback performance
/*
"--ignore-gpu-blacklist",
"--enable-gpu-rasterization",
"--enable-native-gpu-memory-buffers",
"--enable-checker-imaging",
"--disable-quic",
"--enable-tcp-fast-open",
"--disable-gpu-compositing",
"--enable-fast-unload",
"--enable-experimental-canvas-features",
"--enable-scroll-prediction",
"--enable-simple-cache-backend",
"--answers-in-suggest",
"--ppapi-flash-path=/usr/lib/chromium-browser/libpepflashplayer.so",
"--ppapi-flash-args=enable_stagevideo_auto=0",
"--ppapi-flash-version=",
"--max-tiles-for-interest-area=512",
"--num-raster-threads=4",
"--default-tile-height=512",
*/
// End of experimental flags
"http://localhost:8080/viewer",
}
browser := "chromium"
if p.api.test == "linux" {
flags = []string{
"--incognito",
"--remote-debugging-port=9222",
"http://localhost:8080/viewer",
}
browser = "google-chrome"
} else if p.api.test == "mac" {
flags = []string{
"--incognito",
"--remote-debugging-port=9222",
"http://localhost:8080/viewer",
}
browser = "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"
}
p.browser.command = exec.Command(browser, flags...)
p.browser.command.Stdin = os.Stdin
if p.api.debug {
p.browser.command.Stdout = os.Stdout
}
p.browser.command.Stderr = os.Stderr
if err := p.browser.command.Start(); err != nil {
return err
}
p.browser.running = true
ctxt, cancel := context.WithCancel(context.Background())
p.browser.ctxt = &ctxt
p.browser.cancel = &cancel
// not sure if this is appropriate here. Not sure if context is
// absolutely needed actually. I'm not gracefully terminating things
// defer cancel()
return nil
}
// Next goes to the next item in the playlist.
func (p *Player) Next() error {
// TODO: everything
return nil
}
// Previous goes to the previous item in the playlist.
func (p *Player) Previous() error {
// TODO: everything
return nil
}
func handleAPIError(w *http.ResponseWriter, message string) {
m := &resMessage{
Success: false,
Message: message,
}
log.Println(m)
json.NewEncoder(*w).Encode(m)
}
// Listen should listen to something, I forgot what
func (p *Player) Listen(s chan string) {
// TODO: everything
}
// Handles requets to the player api
func (p *Player) ServeHTTP(w http.ResponseWriter, h *http.Request) {
supportedAPIMethods := map[string]bool{
"start": true,
"stop": true,
"play": true,
"pause": true,
"seek": true,
"next": true,
"previous": true,
}
if _, ok := supportedAPIMethods[p.api.message.Method]; !ok {
handleAPIError(&w, "Method not supported: "+p.api.message.Method)
return
}
index := p.api.message.Arguments["index"]
res := wsMessage{
Component: p.api.message.Component,
Method: p.api.message.Method,
Arguments: p.api.message.Arguments,
Event: p.api.message.Method,
Message: index,
Success: true,
}
send := p.ConnViewer.getChanSend()
send <- res
m := &resMessage{Success: true, Event: "StartRequestSent", Message: index}
json.NewEncoder(w).Encode(m)
}
// HandleControl Scan the folder for new files every time the page reloads and display contents
func (p *Player) HandleControl(w http.ResponseWriter, r *http.Request) {
_, loggedIn, err := CheckLogin(w, r)
if err != nil {
log.Println("error trying to retrieve session on login page:", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if !loggedIn {
http.Redirect(w, r, "/login", http.StatusFound)
return
}
err = p.playlist.fromFolder(p.conf.Mount.Dir)
if err != nil {
log.Println("HandleControl: Error trying to read files from directory:\n", err)
t := template.Must(template.ParseFiles("pkg/piplayer/templates/error.html"))
err := t.Execute(w, err)
if err != nil {
log.Println("Error trying to render error page. #fail.", err)
}
return
}
tempControl := TemplateHandler{
filename: "control.html",
statTemplates: p.api.statTemplates,
data: map[string]interface{}{
"location": p.conf.Location,
"Mount": p.conf.Mount.URL,
"playlist": p.playlist,
"error": err,
},
}
if p.api.debug {
log.Println("files in playlist:")
for _, item := range p.playlist.Items {
log.Printf("visual: %s", item.Name())
if item.Audio != nil {
log.Printf("\taudio: %s", item.Audio.Name())
}
}
}
// On every control page reload, send a message to the viewer
// to refresh the items playlist.
msg := wsMessage{
Component: "playlist",
Event: "newItems",
Message: "control page was refreshed. Get new items.",
}
send := p.ConnViewer.getChanSend()
send <- msg
tempControl.ServeHTTP(w, r)
}
// TODO: The Two handlers below only apply to the Chrome player, should they be moved
// the the chrome streamer file? surely not, because they belong to player right?
// HandleViewer handles requests to the image viewer page
// This handler has a dependency on Playlist.
func (p *Player) HandleViewer(w http.ResponseWriter, r *http.Request) {
if err := p.playlist.fromFolder(p.conf.Mount.Dir); err != nil {
log.Println("HandleViewer: Error trying to read files from directory:\n", err)
t := template.Must(template.ParseFiles("pkg/piplayer/templates/error.html"))
err := t.Execute(w, err)
if err != nil {
log.Println("Error trying to render error page. #fail.", err)
}
return
}
th := TemplateHandler{
filename: "viewer.html",
statTemplates: p.api.statTemplates,
data: map[string]interface{}{
"playlist": p.playlist,
},
}
th.ServeHTTP(w, r)
}
// HandleWebSocketMessage handles messages from ConnectionWS that come from the
// browser's websocket connection
// This handler has a dependency on the websockets usually attached to the player.
// the only streamer that will require this is the Chrome streamer.
// Wait, actually no, because the OMXStreamer needs to be used in tandem with the Chrome streamer...
// The VLC streamer shouldn't, so then should we have the option of multiple streamers???
// func (p *Player) HandleWebSocketMessage() {
// if p.api.debug {
// log.Println("Listening to websocket messages from browser")
// }
// recViewer := p.ConnViewer.getChanReceive()
// recControl := p.ConnControl.getChanReceive()
// for {
// select {
// case msg, ok := <-recViewer:
// if !ok {
// log.Println("Error receiving websocket message from viewer")
// return
// }
// if p.api.debug {
// log.Println("got a message from ConnectionWS", msg)
// }
// case msg, ok := <-recControl:
// if !ok {
// log.Println("Error receiving websocket message from Control")
// return
// }
// if p.api.debug {
// log.Println("got a message from ConnectionWS", msg)
// }
// }
// }
// }