Merge pull request #4 from crushedice2000/patch-3

Fix #1  progressbar

Author: 0xFACE

load

@@ -3,16 +3,34 @@
 mac_address="$1"
 file="$2"
 
+function progress_bar() {
+  progress_character='='
+  percent_bar="$(head -c "$(($1/5))" < /dev/zero | tr '\0' $progress_character)"
+  percent_bar="${percent_bar}$(printf "%$((20-($1/5)))s")"
+  printf "\rLoading... [%s] (%s%%)" "$percent_bar" "$1"
+}
+
 function load() {
+  counter=0
+  lines=$(wc -l <$file)
+  progress_bar 0
   while read line; do
     line=$(printf '%s\r' "$line" | xxd -p | tr -d '\n')
-    gatttool -i hci0 -b "$mac_address" --char-write-req -a 0x0031 -n $line
+    gatttool -i hci0 \
+             -n $line \
+             -a 0x0031 \
+             -b "$mac_address" \
+             --char-write-req  1>/dev/null
+    ((counter++))
+    percentage="$(bc <<< "scale=2; (${counter}/${lines})*100")"
+    progress_bar "${percentage%.*}"
   done < $file
+  printf "\n"
 }
 
 if [[ ! "$mac_address" =~ ^([a-fA-F0-9]{2}:){5}[a-zA-Z0-9]{2}$ ]]; then
   error="Wrong MAC address! Example: AA:BB:CC:DD:EE:FF"
-elif [[ ! -r $file && -f $file ]]; then
+elif ! [[ -r $file && -f $file ]]; then
   error="No such file!"
 else
   load