vydGenerateLinkQR

#!/bin/bash

# Define colors for logging
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Function to display logs with colors
function log {
    COLOR=$1
    MESSAGE=$2
    echo -e "${!COLOR}${MESSAGE}${NC}"
}

# Function to display usage information
function usage {
    echo -e "${YELLOW}Usage: $0 -u URL -o OUTPUT_FILE -w WIDTH_IN_PIXELS [optional parameters]${NC}"
    echo ""
    echo "Required Options:"
    echo -e "  ${GREEN}-u URL${NC}                    URL to encode into the QR code"
    echo -e "  ${GREEN}-o OUTPUT_FILE${NC}           Output file name (e.g., url-qr.png)"
    echo ""
    echo "Optional Options:"
    echo -e "  ${GREEN}-w WIDTH_IN_PIXELS${NC}       Width of the QR code in pixels (defaults to 500)"
    echo -e "  ${GREEN}-c FOREGROUND_COLOR (RGBA)${NC}  Color of the dots in the QR code (default: 000000FF)"
    echo -e "  ${GREEN}-b BACKGROUND_COLOR (RGBA)${NC}  Background color of the QR code (default: FFFFFFFF)"
    echo ""
    exit
}

# Default values
FOREGROUND_COLOR="000000FF"
BACKGROUND_COLOR="FFFFFFFF"
WIDTH_IN_PIXELS=500
FORMAT="png"

# Parse command-line arguments
while getopts "u:o:w:c:b:h" flag; do
    case "${flag}" in
        u) URL=${OPTARG};;
        o) OUTPUT_FILE=${OPTARG};;
        w) WIDTH_IN_PIXELS=${OPTARG};;
        c) FOREGROUND_COLOR=${OPTARG};;
        b) BACKGROUND_COLOR=${OPTARG};;
        h) usage;;
        ?) usage;;
    esac
done

# Check if required parameters are provided
if [[ -z "$URL" || -z "$OUTPUT_FILE" ]]; then
    log "RED" "URL and output file name are required."
    usage
fi

# Calculate approximate size for initial QR code generation
# The factor 4 is used as a heuristic to maintain image quality
INITIAL_SIZE=$(($WIDTH_IN_PIXELS / 4))

# Generate QR Code with the initial size
TMP_FILE=$(mktemp ./qr-XXXXXX.png)
qrencode -l M -t PNG -o "$TMP_FILE" -s $INITIAL_SIZE --foreground=$FOREGROUND_COLOR --background=$BACKGROUND_COLOR "$URL"

# Resize the image using ImageMagick with quality preservation
convert "$TMP_FILE" -resize "${WIDTH_IN_PIXELS}x" -quality 100 -sharpen 0x1.0 "$OUTPUT_FILE"

# Clean up temporary file
rm "$TMP_FILE"

# Display success message
log "GREEN" "QR code generated and resized successfully in $OUTPUT_FILE"