[[ChatGPT Create Script]]

I am a programmer and need to write a bash script.
The tee command is not compatible with my system.
I only need the code, no explanation.

I would like to check a folder for existing files that have a timestamp in it and the prefix AF-AD.

If no file exists, do nothing.

Parse each file line by line and check if it contains the following string: "AF-AD-OK"

If not, output an error message and write "OK" in the log file.

If no error message, move the file to sub folder "done"

If it does not have the string in it, move it to an error folder and write a log entry "KO"

And the end of treatment, write "Treatment done" OK or KO in a log file.

Maintain a log file for all operations executed.

## Answer

```bash
#!/bin/bash

# Define the directory to check and subdirectories for processed files
CHECK_DIR="/path/to/check"
DONE_DIR="${CHECK_DIR}/done"
ERROR_DIR="${CHECK_DIR}/processed_with_error"
LOG_FILE="${CHECK_DIR}/operation_log.txt"

# Create subdirectories if they don't exist
mkdir -p "${DONE_DIR}" "${ERROR_DIR}"

# Function to log messages
log() {
    echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "${LOG_FILE}"
}

# Check for files with timestamp and prefix AF-AD
files=$(find "${CHECK_DIR}" -type f -name 'AF-AD-*')

# If no files found, do nothing
if [ -z "$files" ]; then
    exit 0
fi

# Variable to keep track of overall treatment status
treatment_status="OK"

# Process each file
for file in $files; do
    if grep -q "AF-AD-OK" "$file"; then
        # If file contains "AF-AD-OK", move to "done" directory
        mv "$file" "${DONE_DIR}/"
        log "Processed file $(basename "$file"): OK"
    else
        # If file does not contain "AF-AD-OK", move to "error" directory and log KO
        mv "$file" "${ERROR_DIR}/"
        log "Error processing file $(basename "$file"): KO"
        treatment_status="KO"
    fi
done

# Log final treatment status
log "Treatment done: ${treatment_status}"
```

Remember to replace `/path/to/check` with the actual directory you want to monitor. Also, make sure to give execute permission to your script by running `chmod +x script.sh`.