Code cleanup

Improved Code by using extraction and I reduced the amount of redundant code

update

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # updates using a pacman-wrapper and flatpak-update with flags
-# version 1.7
+# version 1.8
 
 source "$HOME"/.config/update.conf
 
@@ -24,14 +24,28 @@ Help() {
    echo "-g             shutdowns the computer afterwards (needs to be the last or only option to work properly)"
    echo "-r             reboots the computer afterwards (needs to be the last or only option to work properly)"
    echo "--help         displays this message"
-   echo "-P, --preview  shows a preview of which pkg's will be updates"
+   echo "-P, --preview  shows a preview of which pkg's can be updated"
+}
+
+check_for_dblck() {
+    while [ -f /var/lib/pacman/db.lck ]; do {
+        echo -e "${IYELLOW}->${NC} /var/lib/pacman/db.lck exists"
+        echo -e "${IYELLOW}->${NC} there might be another instance of pacman running. exiting..."
+        exit 1
+    }
+    done
+}
+
+delete_oldest_backup() {
+    if [[ $1 > $BACKUP_AMOUNT ]]; then
+        OLDEST_FILE="$(ls -t "$BACKUP_LOCATION" | grep $2 | tail -1)"
+        rm "$BACKUP_LOCATION"/"$OLDEST_FILE"
+    fi
 }
 
 before_backup() {
-    if [[ $PRE_BACKUP_AMOUNT > $BACKUP_AMOUNT ]]; then
+    check_for_dblck
-        OLDEST_FILE="$(ls -t "$BACKUP_LOCATION" | grep before-backup | tail -1)"
+    delete_oldest_backup $PRE_BACKUP_AMOUNT before-backup
-        rm "$BACKUP_LOCATION"/"$OLDEST_FILE"
-    fi
     rm -r "$TMP" &> /dev/null
     mkdir "$TMP" && mkdir "$TMP"/before-backup_"$DATE" && mkdir "$TMP"/after-backup_"$DATE"
     pacman -Q > "$TMP"/before-backup_"$DATE"/pacman-pre.txt
@@ -44,10 +58,7 @@ before_backup() {
 }
 
 after_backup() {
-    if [[ $POST_BACKUP_AMOUNT > $BACKUP_AMOUNT ]]; then
+    delete_oldest_backup $POST_BACKUP_AMOUNT after-backup
-        OLDEST_FILE="$(ls -t "$BACKUP_LOCATION" | grep after-backup | tail -1)"
-        rm "$BACKUP_LOCATION"/"$OLDEST_FILE"
-    fi
     tar -cJf "$TMP"/after-backup_"$DATE".tar.xz.new "$TMP"/after-backup_"$DATE" &> /dev/null
     cp "$TMP"/after-backup_"$DATE".tar.xz.new "$BACKUP_LOCATION"
     rename after-backup_"$DATE".tar.xz.new after-backup_"$DATE".tar.xz "$BACKUP_LOCATION"/after-backup_"$DATE".tar.xz.new
@@ -55,8 +66,10 @@ after_backup() {
 }
 
 update_with_pacman_wrapper() {
+    before_backup && echo -e "${IGREEN}pre-backup complete${NC}"
 	"$PACMAN_WRAPPER"
     pacman -Q > "$TMP"/after-backup_"$DATE"/pacman-after.txt
+    after_backup && echo -e "${IGREEN}after-backup complete${NC}"
 }
 
 update_with_flatpak() {
@@ -67,15 +80,6 @@ update_with_flatpak() {
 [[ $1 = --help ]] && Help && exit 0
 [[ $1 = --preview || $1 = -P ]] && sudo pacman -Sy &> /dev/null && sudo pacman -Qu && exit 0
 
-while [ -f /var/lib/pacman/db.lck ]; do {
-    echo -e "${IYELLOW}->${NC} /var/lib/pacman/db.lck exists"
-    echo -e "${IYELLOW}->${NC} there might be another instance of pacman running. exiting..."
-    exit 1
-}
-done
-
-before_backup && echo -e "${IGREEN}pre-backup complete${NC}"
-
 [[ -z $1 ]] && update_with_pacman_wrapper;
 while getopts 'fpagr' OPTIONS; do
     case "$OPTIONS" in
@@ -84,19 +88,15 @@ while getopts 'fpagr' OPTIONS; do
         p)
             update_with_pacman_wrapper ;;
         a)
-            update_with_pacman_wrapper; update_with_flatpak ;;
+            update_with_flatpak; update_with_pacman_wrapper ;;
         g)
             [[ $1 = -g ]] && update_with_pacman_wrapper
-            after_backup && echo -e "${IGREEN}after-backup complete${NC}" && sleep 3s && shutdown now
+            sleep 3s && shutdown now && exit 0;;
-            exit 0;;
         r)
             [[ $1 = -r ]] && update_with_pacman_wrapper
-            after_backup && echo -e "${IGREEN}after-backup complete${NC}" && sleep 3s && reboot
+            sleep 3s && reboot && exit 0;;
-            exit 0;;
         ?)
             Help
             exit 1;;
     esac
 done
-
-after_backup && echo -e "${IGREEN}after-backup complete${NC}"