sh.zio.notify: add file support

usr/local/bin/sh.zio.notify

@@ -5,20 +5,11 @@ _PLUG_DESCRIPTION=""
 _PLUG_ARGS=(
     "message;m;;string;(No Message)"
     "title;t;;string;(No Title)"
+    "file;f;;path"
     "level;l;;string;info"
     "invoked-by;i;;string"
 )
 
-function get_cache_header() {
-	topic="$1"
-
-	if [[ "$topic" == "zio_test" ]]; then
-		echo ""
-	else
-		echo "Cache: no"
-	fi
-}
-
 function get_level_emoji() {
 	case "$1" in
 		"critical"|"error") echo "⛔" ;;
@@ -75,11 +66,28 @@ function main() {
         "topic": "'$n_topic'"
     }'
 
-	curl -d "$body" \
-		-H "Authorization: Bearer $token" \
-		-H "$(get_cache_header "$n_topic")" \
-		-H "Markdown: yes" \
-		"https://ntfy.zio.sh/"
+    curl_command="curl -d \"$body\""
+    curl_command+=" -H \"Authorization: Bearer $token\""
+    curl_command+=" -H \"Markdown: yes\""
+
+    if [[ "$n_topic" == "zio_test" ]]; then
+    	curl_command+=" -H \"Cache: no\""
+    fi
+
+    if [[ "$_file" != "" ]]; then
+    	if [[ ! -f "$_file" ]]; then
+    		die "Cannot attach '$_file': file does not exist"
+    	fi
+
+    	full_file="$(realpath -s "$_file")"
+
+    	curl_command+=" -T \"$full_file\""
+    	curl_command+=" -H \"Filename: $(basename "$full_file")\""
+    fi
+
+    curl_command+=" https://ntfy.zio.sh/"
+
+	echo $curl_command
 }
 
 if [[ $_PLUG_INVOKED != "true" ]]; then