monitor.sh

#!/bin/bash

# Base input and output directories
INPUT_DIR="/input"
OUTPUT_DIR="/output"
NEW_EXTENSION="${FORMAT:-.epub}"
NO_KEPUB="${NO_KEPUB:false}"

# File to keep track of processed files
PROCESSED_FILES_LOG="/config/processed_files.log"

# Create the processed files log if it doesn't exist
touch "$PROCESSED_FILES_LOG"

process_file() {
  local INPUT_FILE="$1"
  local OUTPUT_FILE="$2"

  if [[ ! -f "$OUTPUT_FILE" ]]; then
    # Check if the file has been processed before
    if ! grep -q "$INPUT_FILE" "$PROCESSED_FILES_LOG"; then
      # Convert it
      echo "Processing file: $INPUT_FILE -> $OUTPUT_FILE"

      # Create the corresponding output directory structure
      mkdir -p "$(dirname "$OUTPUT_FILE")"

      echo "Using the following parameters: $INPUT_FILE ${NO_KEPUB:+--nokepub} --forcecolor --profile $PROFILE  --output $(dirname "$OUTPUT_FILE")"
      python3 kcc/kcc-c2e.py "$INPUT_FILE" ${NO_KEPUB:+--nokepub} --forcecolor --profile "$PROFILE" --output "$(dirname "$OUTPUT_FILE")"
      # Log the processed input file
      echo "$INPUT_FILE" >>"$PROCESSED_FILES_LOG"
    else
      echo "File already processed: $INPUT_FILE"
    fi
  else
    echo "Output file already exists, skipping: $OUTPUT_FILE"
  fi
}

# Initial check: Process all existing files in the input directory
find "$INPUT_DIR" -type f | while read -r INPUT_FILE; do
    RELATIVE_PATH="${INPUT_FILE#$INPUT_DIR/}"
    OUTPUT_FILE="$OUTPUT_DIR/${RELATIVE_PATH%.*}.$NEW_EXTENSION"
    process_file "$INPUT_FILE" "$OUTPUT_FILE"
done

# Monitor the input folder for changes
inotifywait -m -r -e close_write,moved_to,create "$INPUT_DIR" |
  while read -r directory events filename; do
    # Full path of the new or modified file
    INPUT_FILE="$directory$filename"
    # Calculate the relative path of the file within the input directory
    RELATIVE_PATH="${INPUT_FILE#$INPUT_DIR/}"
    # Remove the current extension and add the new one
    OUTPUT_FILE="$OUTPUT_DIR/${RELATIVE_PATH%.*}.$NEW_EXTENSION"
    # Process the new or modified file
    process_file "$INPUT_FILE" "$OUTPUT_FILE"
  done