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package com.rockymadden.stringmetric.cli
abstract class Command(
protected val help: (OptionMap => String),
protected val predicate: (OptionMap => Boolean),
protected val execute: (OptionMap => String)
) {
private def error(error: Throwable, opts: OptionMap): Unit =
if (!isUnitTest(opts)) {
println(error.getMessage)
sys.exit(1)
} else throw error
private def exit(opts: OptionMap): Unit = if (!isUnitTest(opts)) sys.exit(0)
private def isUnitTest(opts: OptionMap) =
opts.contains('ut) || (opts.contains('unitTest) && opts.get('unitTest) != "false")
final def main(args: Array[String]): Unit = {
val opts: OptionMap = args
try
if (opts.contains('h) || opts.contains('help)) {
println(help(opts))
exit(opts)
} else if (predicate(opts)) {
println(execute(opts))
exit(opts)
} else throw new IllegalArgumentException("Expected valid syntax. See --help.")
catch { case e: Throwable => error(e, opts) }
}
}
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