contact-sheet.sh

#!/bin/bash

# Ensure a parent directory is specified
if [ -z "$1" ]; then
  echo "Usage: $0 <parent_directory>"
  exit 1
fi

parent_dir="$1"

# Check if the parent directory exists
if [ ! -d "$parent_dir" ]; then
  echo "Directory not found: $parent_dir"
  exit 1
fi

# Initialize a queue with the parent directory
directories_to_process=("$parent_dir")

# Loop through the directories in the queue
while [ ${#directories_to_process[@]} -gt 0 ]; do
  # Pop the first directory from the queue
  input_dir="${directories_to_process[0]}"
  directories_to_process=("${directories_to_process[@]:1}")

  # Check if the current directory contains any img files
if find "$input_dir" -maxdepth 1 -type f \( -iname "*.jpg" -o -iname "*.jpeg" -o -iname "*.JPG" -o -iname "*.png" \) | grep -q .; then
    echo "Processing directory: $input_dir"
    
    # Create a temporary directory for processed images
    temp_dir="./temp_processed_images"
    mkdir -p "$temp_dir"

    # Preprocess images to make all landscape
    find "$input_dir" -maxdepth 1 -type f \( -iname "*.JPG" -o -iname "*.PNG" -o -iname "*.JPEG" \) | while read -r img; do
      orientation=$(identify -format "%[fx:w>h?0:1]" "$img")
      if [ "$orientation" -eq 1 ]; then
        # Rotate portrait images to landscape
        magick "$img" -rotate -90 "$temp_dir/$(basename "$img")"
      else
        # Copy landscape images as is
        cp "$img" "$temp_dir/$(basename "$img")"
      fi
    done

    # Generate list of processed images
    find $temp_dir -type f \( -iname "*.jpg" -o -iname "*.jpeg" -o -iname "*.JPG" -o -iname "*.png" \) | sort > imglist


    # Calculate number of images
    read nImgs <<< $(sed -n '$=' imglist)

    # Calculate rows and columns
    let columnSize=6
    let nrows=nImgs/columnSize
    let lefto=nImgs%columnSize

    if [ $lefto -gt 0 ]; then
      let nrows=nrows+1
    fi

    # # Extract folder name and use in montage
    output_name=$(basename "$input_dir")
    montage @imglist -geometry 200x150+2-5 -tile ${columnSize}x${nrows} "${output_name}.jpg"

    # # Cleanup
    rm imglist
    rm -rf "$temp_dir"
  else
    echo "No images found in directory: $input_dir, checking subdirectories."
    # Add subdirectories of the current directory to the queue
    for sub_dir in "$input_dir"*/; do
      if [ -d "$sub_dir" ]; then
        directories_to_process+=("$sub_dir")
      fi
    done
  fi
done