From 5eab31f0931c3912004ed7c0ea4bf9ffe1160509 Mon Sep 17 00:00:00 2001
From: KemoNine <kemonine@kemonine.info>
Date: Sat, 5 Sep 2020 02:08:57 -0400
Subject: [PATCH] Cleanup fim so it can properly handle album selections ; need
 to play tricks due to fim NOT supporting mulitple directories via CLI

---
 ui/slideshow.go | 99 +++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 92 insertions(+), 7 deletions(-)

diff --git a/ui/slideshow.go b/ui/slideshow.go
index 58494e9..00d8aca 100644
--- a/ui/slideshow.go
+++ b/ui/slideshow.go
@@ -3,7 +3,9 @@ package ui
 import (
 	"context"
 	"io"
+	"io/ioutil"
 	"log"
+	"os"
 	"os/exec"
 	"syscall"
 	"time"
@@ -11,19 +13,102 @@ import (
 	"github.com/eiannone/keyboard"
 	"github.com/knadh/koanf"
 
-	pfconfig "git.kemonine.info/PiFrame/config"
+	"git.kemonine.info/PiFrame/config"
 )
 
 const (
-	CMD_FIM = "/usr/local/bin/pf-fim.sh"
+	PATH_TEMP_FOR_SLIDESHOW = "/run/piframe/fim"
 )
 
-func Slideshow(config *koanf.Koanf) {
+func Slideshow(pfconfig *koanf.Koanf) {
+	// Prep folder setup needed for fim
+	//     fim does NOT allow multiple folders passed on the CLI (as far as KemoNine can tell)
+	//     We build a temp folder stup in /run/piframe/fim that has symlinks to selected albums
+	//     After we build up this directory setup we'll kick off fim against the temp dir with recursive
+	//     /run is a tmpfs so this won't wear on the sd card storage
+
+	// Create temp folder
+	_, err := os.Stat(PATH_TEMP_FOR_SLIDESHOW)
+	if os.IsNotExist(err) {
+		errDir := os.MkdirAll(PATH_TEMP_FOR_SLIDESHOW, 0755)
+		if errDir != nil {
+			log.Fatalf("Error setting up slideshow : %s", err)
+		}
+	}
+
+	// Cleanup temp folder if it already existed
+	dirRead, err := os.Open(PATH_TEMP_FOR_SLIDESHOW)
+	if err != nil {
+		log.Fatalf("Error setting up slideshow : %s", err)
+	}
+	dirFiles, err := dirRead.Readdir(0)
+	if err != nil {
+		log.Fatalf("Error setting up slideshow : %s", err)
+	}
+    // Loop over the directory's files.
+    for index := range(dirFiles) {
+        fileHere := dirFiles[index]
+
+        // Get name of file and its full path.
+        nameHere := fileHere.Name()
+        fullPath := PATH_TEMP_FOR_SLIDESHOW + "/" + nameHere
+
+        // Remove the file.
+		err = os.Remove(fullPath)
+		if err != nil {
+			log.Fatalf("Error setting up slideshow : %s", err)
+		}
+	}
+	
+	// Setup symlinks to selected albums to be used with slideshow
+	// Add albums full paths to command line args for fim
+	albumRootPath := pfconfig.String(config.CONFIG_KEY_ALBUMS_ROOT)
+	for _, album := range pfconfig.Strings(config.CONFIG_KEY_ALBUMS_SELECTED) {
+		source := albumRootPath + album
+		destination := PATH_TEMP_FOR_SLIDESHOW + album
+		if album == "/" {
+			files, err := ioutil.ReadDir(albumRootPath)
+			if err != nil {
+				log.Fatalf("Error setting up slideshow : %s", err)
+			}
+
+			for _, file := range files {
+				filePath := albumRootPath + "/" + file.Name()
+				fileStat, err := os.Stat(filePath)
+				if err != nil {
+					log.Fatalf("Error setting up slideshow : %s", err)
+				}
+				mode := fileStat.Mode()
+				if mode.IsRegular() {
+					err = os.Symlink(filePath, PATH_TEMP_FOR_SLIDESHOW + "/" + file.Name())
+					if err != nil {
+						log.Fatalf("Error setting up slideshow : %s", err)
+					}
+				}
+			}
+			continue
+		}
+		err = os.Symlink(source, destination)
+		if err != nil {
+			log.Fatalf("Error setting up slideshow : %s", err)
+		}
+	}
+
 	// fim placeholder so we can operate on it when a exit slideshow is received
 	var fim *exec.Cmd = nil
 
-	// Run slideshow
-	fim = exec.Command(CMD_FIM)
+	// Prep slideshow command and arguments
+	//     NOTE: The random flag is seeded with time() ; this is bad as we will be restarting the slideshow at about the same time per the configurd schedule
+	//           We use the non-seeded form to ensure that it's a little more random (or at least hope it's a little more random)
+	CMD_FIM := "/usr/bin/fim"
+	ARGS_FIM := []string{"--no-commandline", "--no-history", "--etc-fimrc", "/usr/local/etc/fimrc",
+		"--device", "/dev/fb0", "--vt", "1",
+		"--execute-commands-early", "\"clear\"", "--final-commands", "\"clear\"",
+		"--autozoom", "--random-no-seed", "--recursive", "--cd-and-readdir",
+		PATH_TEMP_FOR_SLIDESHOW}
+	
+	// fim command that'll be executed
+	fim = exec.Command(CMD_FIM, ARGS_FIM...)
 	// Put fim into a process group so ALL processes that may be executed are exited when main process exits
 	fim.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 
@@ -34,7 +119,7 @@ func Slideshow(config *koanf.Koanf) {
 	}
 
 	// Advance slideshow every interval as defined in const()
-	ticker := time.NewTicker(config.Duration(pfconfig.CONFIG_KEY_SLIDESHOW_INTERVAL))
+	ticker := time.NewTicker(pfconfig.Duration(config.CONFIG_KEY_SLIDESHOW_INTERVAL))
 	stop_ticker := make(chan struct{})
 	go func() {
 		for {
@@ -101,7 +186,7 @@ func Slideshow(config *koanf.Koanf) {
 					if err != nil {
 						log.Fatalf("Error controlling fim : %s", err)
 					}
-					ticker.Reset(config.Duration(pfconfig.CONFIG_KEY_SLIDESHOW_INTERVAL))
+					ticker.Reset(pfconfig.Duration(config.CONFIG_KEY_SLIDESHOW_INTERVAL))
 				}
 			}
 		}