i3-settree: Add saving functionality

i3-settree

@@ -23,7 +23,7 @@ log() {
 	return 0
 }
 prepare_input() {
-	options=""
+	options="Save"
 	for file in "$treespath"/*; do
 		if ! [ -r "$file" ]; then
 			# Cannot read the file; skip it
@@ -33,16 +33,20 @@ prepare_input() {
 			# File is not a json structure; skip it
 			continue
 		fi
+		if [[ "$file" = "$treespath/$name-layout-"* ]]; then
+			# File is an unmodified saved tree; skip it
+			continue
+		fi
+		if [ "$(basename -s ".json" -- "$file")" = "Save" ]; then
+			# File conflicts with reserved word "Save"; skip it
+			continue
+		fi
 		if ! [ -f "$file" ]; then
 			# Glob failed and no files exist; error
 			return 1
 		fi
-		if [ -z "$options" ]; then
-			options="$(basename -s ".json" -- "$file")"
-		else
-			options="$options
+		options="$options
 $(basename -s ".json" -- "$file")"
-		fi
 	done
 	printf "%s" \
 		"$options"
@@ -52,7 +56,7 @@ $(basename -s ".json" -- "$file")"
 # Steps
 step_validate_deps() {
 	# Ensure we have all the programs we need to do this
-	for dep in rofi i3-msg; do
+	for dep in mkdir date rofi i3-msg notify-send; do
 		if ! command -v "$dep" > /dev/null 2>&1; then
 			log "Could not validate dependency \"$dep\""
 			return 1
@@ -90,9 +94,22 @@ step_get_input() {
 }
 step_act() {
 	# Do the do
-	# Using a case statement here in case I want to implement saving
-	# functionality later
 	case "$choice" in
+		Save)
+			file="$treespath/$name-layout-$(date +%s%N).json"
+			if [ -f "$file" ]; then
+				log "Not clobbering existing layout file: $file"
+				return 60
+			fi
+			i3-save-tree > "$file"
+			notify-send \
+				-u normal \
+				-a "$name" \
+				-t 3000 \
+				-i dialog-information \
+				"Saved Layout" \
+				"Saved current i3 tree to:\n$file"
+			;;
 		*)
 			i3-msg "append_layout $choicefile" > /dev/null 2>&1
 			if [ -r "$choicefile.rc" ]; then