feat: sanity checks in sample screenshotter

sample_screenshotter.sh

@@ -1,26 +1,67 @@
 #!/usr/bin/env bash
 
 # Script Configuration
-IMAGEPATH="$HOME/Pictures"
-IMAGENAME="ass"
-FILE="${IMAGEPATH}/${IMAGENAME}.png"
-LOG_DIR=$(pwd)
-CONFIG_FILE="config.sh"
-
-# Load configuration if available
+# Load configuration file if available
 # this is useful if you want to source keys from a secret file
+CONFIG_FILE="config.sh"
 if [ -f "$CONFIG_FILE" ]; then
+	# shellcheck disable=1090
 	source "${CONFIG_FILE}"
 fi
 
+LOG_DIR=$(pwd)
+if [ ! -d "$LOG_DIR" ]; then
+	echo "The directory you have specified to save the logs does not exist."
+	echo "Please create the directory with the following command:"
+	echo "mkdir -p $LOG_DIR"
+	echo -en "Or specify a different LOG_DIR\n"
+	exit 1
+fi
+
+IMAGE_PATH="$HOME/Pictures"
+if [ ! -d "$IMAGE_PATH" ]; then
+	echo "The directory you have specified to save the screenshot does not exist."
+	echo "Please create the directory with the following command:"
+	echo "mkdir -p $IMAGE_PATH"
+	echo -en "Or specify a different IMAGE_PATH\n"
+	exit 1
+fi
+
+IMAGE_NAME="ass"
+FILE="${IMAGE_PATH}/${IMAGE_NAME}.png"
+
+# Function to check if a tool is installed
+check_tool() {
+	command -v "$1" >/dev/null 2>&1
+}
+
 # Function to take Flameshot screenshots
 takeFlameshot() {
-	flameshot config -f "${IMAGENAME}"
-	flameshot gui -r -p "${IMAGEPATH}" >/dev/null
+	# check if flameshot tool is installed
+	REQUIRED_TOOLS=("flameshot")
+
+	for tool in "${REQUIRED_TOOLS[@]}"; do
+		if ! check_tool "$tool"; then
+			echo "Error: $tool is not installed. Please install it before using this script."
+			exit 1
+		fi
+	done
+
+	flameshot config -f "${IMAGE_NAME}"
+	flameshot gui -r -p "${IMAGE_PATH}" >/dev/null
 }
 
 # Function to take Wayland screenshots using grim + slurp
 takeGrimshot() {
+	# check if grim and slurp are installed
+	REQUIRED_TOOLS=("grim" "slurp")
+	for tool in "${REQUIRED_TOOLS[@]}"; do
+		if ! check_tool "$tool"; then
+			echo "Error: $tool is not installed. Please install it before using this script."
+			exit 1
+		fi
+	done
+
 	grim -g "$(slurp)" "${FILE}" >/dev/null
 }