Todo Manager

#!/usr/bin/sh

display_help() {
    cat << EOF

Script Name: Todo Manager
Author: Aidan Danielski
Date Created: Sat August 19th 2023
Description:
  A utility script to manage todo entries stored in specific directories.
  Provides functionalities for listing, reading, retiring, and clearing entries.

Usage:
  ./script.sh [where] [action] [entry-name/pattern (if required)]

Arguments:
  where:
    Specify the storage location. Options include:
      - db|drop|box|dropbox: Refers to $HOME/Dropbox/todo
      - ms|mega|sync|megasync: Refers to $HOME/MEGAsync/todo

  action:
    Specify the action to perform. Options include:
      - list: Lists all entries
      - read: Reads a specific entry
      - retire: Moves an entry to a "retired" folder
      - clear: Deletes all entries
      - If no action is provided, creates a new entry

  entry-name/pattern:
    Used with the "read" and "retire" actions to specify which entry to act upon.

Examples:
  ./script.sh db list: Lists all entries in the Dropbox todo folder.
  ./script.sh ms read project: Reads entries containing the word "project" in the MEGAsync todo folder.
  ./script.sh drop retire old-task: Retires entries containing the word "old-task" in the Dropbox todo folder.
  ./script.sh mega clear: Deletes all entries in the MEGAsync todo folder.

Note:
  Be cautious when using the clear action. Ensure backups are made as this will delete all files in the chosen location.

EOF
}

where="$1"
action="$2"
entry="$3"

# Display help if the user provides "help" as the first argument
if [ "$where" = "help" ]; then
    display_help
    exit 0
fi

if [ -z "$where" ]; then
    echo "Please provide a storage argument."
    exit 1
fi

case $where in
    db|drop|box|dropbox)
        folder="$HOME/Dropbox/todo"
        ;;
    ms|mega|sync|megasync)
        folder="$HOME/MEGAsync/todo"
        ;;
    *)
        echo "Invalid \"$where\" :: ..."
        exit 1
        ;;
esac

cd "$folder" || { echo "Error: Unable to change directory to $folder"; exit 1; }

case $action in
    list)
        ls -al --color=auto
        ;;

    read)
        if [ -z "$entry" ]; then
            echo "Please provide a filename or part of the filename to read."
            exit 1
        fi
        grep -l "$entry" * | xargs cat
        ;;

    retire)
        if [ -z "$entry" ]; then
            echo "Please provide a filename or part of the filename to retire."
            exit 1
        fi
        mkdir -p retired
        mv "$(grep -l "$entry" *)" retired/
        ;;

    clear)
        echo "Clearing all entries..."
        rm *
        ;;

    *)
        new="Todo entry $(date '+%Y-%m-%d %H:%M:%S').txt"
        echo "Opening $new!"
        touch "$new"
        chmod +rw "$new"
        /usr/bin/gedit "$new" &
        ;;
esac