add -s,--stdin parameter

bin/gotify

@@ -3,6 +3,7 @@
 set -aeou pipefail
 
 GOTIFY_CLI_CONFIG_FILE="${GOTIFY_CLI_CONFIG_FILE-"$HOME/.gotify.sh"}"
+GOTIFY_STDIN=false
 
 
 function printHelp(){
@@ -13,6 +14,7 @@ Usage ${0##*/} [options..] <Mesage>
 -p,--priority           Set priority of the message
 -T,--token              Specify gotify app token
 -b,--bash-completion    Print out bash completion and exit
+-s, --stdin             Read STDIN instead of taking <message>
 EOF
 }
 
@@ -82,6 +84,9 @@ while :; do
             GOTIFY_URL="$2"
             shift
             ;;
+        -s|--stdin)
+            GOTIFY_STDIN=true
+            ;;
         -b|--bash-completion)
             print_bash_completion
             exit 0
@@ -100,11 +105,14 @@ while :; do
     shift
 done
 
-
-if [[ -z "${1-}" ]]; then
+if $GOTIFY_STDIN; then
+    read -r MESSAGE
+elif [[ -z "${1-}" ]]; then
     printf "ERROR: No message to send\n" >&2
     printHelp
     exit 2
+else
+    MESSAGE="$1"
 fi
 
-sendMessage "${1-}"
+sendMessage "$MESSAGE"