package internal import ( "os/exec" "strconv" "sync" "time" "git.velvettear.de/velvettear/loggo" "git.velvettear.de/velvettear/slideshow/internal/config" ) var loop int64 // start the loop for the slideshow func StartSlideshow() { for { timestamp := time.Now().UnixMilli() loop++ imageLoop() loggo.InfoTimed("slideshow loop #"+strconv.FormatInt(loop, 10)+" finished", timestamp) loggo.Debug("sleeping for " + strconv.FormatFloat(config.Interval.Seconds(), 'f', 0, 64) + " seconds...") time.Sleep(config.Interval) } } // the image loop of the slideshoow func imageLoop() { name, error := requestImageName() if error != nil { loggo.Error("encountered an error requesting the name of an image", error.Error()) return } var waitgroup sync.WaitGroup waitgroup.Add(2) go setBackground(name, &waitgroup) go exportColorPalette(name, &waitgroup) waitgroup.Wait() if !config.IsScriptStageSet() { runScript(false) } } // encapsulated method to set the background image in a goroutine func setBackground(name string, waitgroup *sync.WaitGroup) { timestamp := time.Now().UnixMilli() defer waitgroup.Done() if config.IsScriptStagePreImage() { runScript(false) } stream, error := requestImageData(name) if error != nil { loggo.Error("encountered an error requesting the data stream for image '"+name+"'", error.Error()) return } error = streamToFeh(stream) if error != nil { loggo.Error("encountered an error piping the data stream for image '"+name+"' to 'feh'", error.Error()) } loggo.InfoTimed("set new background image '"+name+"' via 'feh'", timestamp) if config.IsScriptStagePostImage() { runScript(false) } } // encapsulated method to set the background image in a goroutine func exportColorPalette(name string, waitgroup *sync.WaitGroup) { timestamp := time.Now().UnixMilli() if !config.IsPaletteSet() { return } defer waitgroup.Done() if config.IsScriptStagePrePalette() { runScript(false) } stream, error := requestColorPalette(name) if error != nil { loggo.Error("encountered an error requesting the data stream for the color palette of image '"+name+"'", error.Error()) return } error = streamToFile(stream, config.PaletteFile) if error != nil { loggo.Error("encountered an error piping the data stream for the color palette of image '"+name+"' to file '"+config.PaletteFile+"'", error.Error()) } loggo.InfoTimed("exported color palette of image '"+name+"' to '"+config.PaletteFile+"'", timestamp) if config.IsScriptStagePostPalette() { runScript(false) } } // encapsulated method to run the defined script func runScript(running bool) { if !running && config.ScriptAsync { go runScript(true) return } timestamp := time.Now().UnixMilli() if !config.IsScriptSet() { return } cmd := exec.Command(config.Script) error := cmd.Run() if error != nil { loggo.Error("encountered an error executing the script '"+config.Script+"'", error.Error()) return } var extras []string if config.ScriptAsync { extras = append(extras, "async: "+strconv.FormatBool(config.ScriptAsync)) } if config.IsScriptStageSet() { extras = append(extras, "stage: "+config.ScriptStage) } loggo.InfoTimed("executed script '"+config.Script+"'", timestamp, extras...) }