问1)文件列表脚本中的case语句中出现简单脚本错误

EN

#!/bin/bash
for file in ./* #This points to current directory with ./* and views files inside.
do
    if [[ -f $file ]] #If File Exists, read it
            read file
    then
            echo -e 'Would you like to view this file? Press 1 For Yes and 2 For No'
            read boolean #reads the prompt 1 or 2 to then proceed with the case              statement below
    case $boolean
    1)
            echo -e 'Preview of File...'
            read boolean
            2)
            echo -e 'Exit Program...'
            read boolean
    if [ boolean -eq 1 ] #This part of the code finds out if the prompt was answered with 1 (yes), if it was then it produces the first 3 lines of the file, if it was 2 then it quits the program.
    then line=$(head -n 3 file)
    else
    *( echo -e 'Please enter a valid option' #If someone enters 3-9 then the program will require them to enter a valid number.
    esac
    done
    fi