Helper function to delete node_modules and re-install them

cleanup.sh

cleanup(){
        if [[ -f "package.json" ]]
        then
                echo "Deleting node_modules..." && (rm -rf node_modules || echo "No node_modules to delete")
                if [[ -n "$1" ]]
                then
                        if [[ $1 = "npm" ]]; then (rm package-lock.json || rm yarn.lock || echo "No lock files to delete") && echo "Installing packages via npm..." && npm i
                        elif [[ $1 = "yarn" ]]; then (rm yarn.lock || rm package-lock.json || echo "No lock files to delete") && echo "Installing packages via yarn... " && yarn
                        else echo "Package manager '$1' not recognised. Aborting..."
                        fi
                elif [[ -f "package-lock.json" ]]
		            then
                        if [[ $+commands[npm] ]]; then echo "Deleting package-lock.json...." && rm package-lock.json && echo "Installing packages via npm..." && npm i
                        else "This directory has a package-lock.json but npm is not available on this system. Aborting..."
                        fi
                elif [[ -f "yarn.lock" ]]
                then
                        if [[ $+commands[yarn] ]]; then echo "Deleting yarn.lock..." && rm yarn.lock && echo "Installing packages via yarn" && yarn
                        else "This directory has a yarn.lock but yarn is not available on this system. Aborting..."
                        fi
                else
                        echo "No lock files found."
                        if [[ $+commands[yarn] ]]; then echo "Installing packages via yarn..." && yarn
                        elif [[ $+commands[npm] ]]; then echo "Installing packages via npm..." && npm i
                        else echo "Neither yarn or npm are installed on this system."
                        fi
                fi
        else echo "Are you sure this a node directory? package.json is missing."
        fi
}