Add a TON of error handling that was previously skipped (intentionally but really needs to be there) ; added basic filesystem walk of albums dir to facilitate config of which albums are used for the slideshow

cmd/ui/ui.go

@@ -6,7 +6,9 @@ import (
 	"log"
 	"math"
 	"net"
+	"os"
 	"os/exec"
+	"path/filepath"
 	"strconv"
 	"strings"
 
@@ -18,10 +20,12 @@ import (
 )
 
 const (
-	CMD_SYSTEMCTL = "/usr/bin/systemctl"
-	CMD_FINDMNT   = "/usr/bin/findmnt"
-	CMD_VCGENCMD  = "/opt/vc/bin/vcgencmd"
-	FILE_CPU_TEMP = "/sys/class/thermal/thermal_zone0/temp"
+	CMD_SYSTEMCTL         = "/usr/bin/systemctl"
+	CMD_FINDMNT           = "/usr/bin/findmnt"
+	CMD_VCGENCMD          = "/opt/vc/bin/vcgencmd"
+	FILE_CPU_TEMP         = "/sys/class/thermal/thermal_zone0/temp"
+	ALBUM_ROOT_DIR        = "/tank/pictures"
+	SYNCTHING_FOLDER_SKIP = ".stfolder"
 )
 
 const (
@@ -42,29 +46,56 @@ func main() {
 	// Network interfaces for status panel
 	ifaces, err := net.Interfaces()
 	if err != nil {
-		log.Printf("Error getting netork interfaces : %s", err)
+		log.Fatalf("Error getting netork interfaces : %s", err)
 		return
 	}
 
 	// Disk use
-	findmntOut, _ := exec.Command(CMD_FINDMNT, "-n", "-l",
+	findmntOut, err := exec.Command(CMD_FINDMNT, "-n", "-l",
 		"-o", "TARGET,USE%",
 		"-t", "ext4,exfat,vfat,btrfs,zfs,xfs").Output()
+	if err != nil {
+		log.Fatalf("Error getting disk use : %s", err)
+	}
 	filesystems := strings.Split(strings.Trim(string(findmntOut), "\n"), "\n")
 
 	// GPU Temp
-	vcgencmdOut, _ := exec.Command(CMD_VCGENCMD, "measure_temp").Output()
+	vcgencmdOut, err := exec.Command(CMD_VCGENCMD, "measure_temp").Output()
+	if err != nil {
+		log.Fatalf("Error getting GPU temp : %s", err)
+	}
 	gpuTemp := strings.Split(strings.Trim(string(vcgencmdOut), "\n"), "=")[1]
 
 	// CPU Temp
 	cpuTempFileContents, err := ioutil.ReadFile(FILE_CPU_TEMP)
 	if err != nil {
-		log.Fatalf("Error reading file %s : %s", FILE_CPU_TEMP, err)
+		log.Fatalf("Error getting CPU temp : %s", err)
 	}
 	cpuTempStr := strings.Trim(string(cpuTempFileContents), "\n")
-	cpuTempInt, _ := strconv.Atoi(cpuTempStr)
+	cpuTempInt, err := strconv.Atoi(cpuTempStr)
+	if err != nil {
+		log.Fatalf("Error processing CPU temp : %S", err)
+	}
 	cpuTemp := fmt.Sprintf("%.2f'C", float64(cpuTempInt)/1000.0)
 
+	// Get list of all folders that can be used as albums
+	var albums []string
+	err = filepath.Walk(ALBUM_ROOT_DIR, func(path string, fi os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if fi.IsDir() {
+			if strings.Contains(path, SYNCTHING_FOLDER_SKIP) {
+				return nil
+			}
+			albums = append(albums, path)
+		}
+		return nil
+	})
+	if err != nil {
+		log.Fatalf("Error getting list of albums : %s", err)
+	}
+
 	// Run config UI when slideshow stops
 	app := tview.NewApplication()