rename Arguments to Options, implement Arguments

src/commonMain/kotlin/com/infendro/cli/command/Option.kt

@@ -0,0 +1,93 @@
+package com.infendro.cli.command
+
+import com.infendro.cli.exception.build.NoOptionNameException
+import com.infendro.cli.parser.BooleanParser
+import com.infendro.cli.parser.IntParser
+import com.infendro.cli.parser.Parser
+import com.infendro.cli.parser.StringParser
+
+sealed class Option<T>(
+    val names: List<String>,
+    val parser: Parser<T>,
+) {
+    val name: String
+        get() = names[0]
+
+    abstract val required: Boolean
+
+    init {
+        if (names.isEmpty())
+            throw NoOptionNameException()
+    }
+
+    class Required<T>(
+        names: List<String>,
+        parser: Parser<T>,
+    ) : Option<T>(names, parser) {
+        override val required: Boolean
+            get() = true
+    }
+
+    class OrElse<T>(
+        names: List<String>,
+        val other: T,
+        parser: Parser<T>,
+    ) : Option<T>(names, parser) {
+        override val required: Boolean
+            get() = false
+    }
+
+    class OrNull<T>(
+        names: List<String>,
+        parser: Parser<T>,
+    ) : Option<T>(names, parser) {
+        override val required: Boolean
+            get() = false
+    }
+
+    class Variable<T>(
+        names: List<String>,
+        parser: Parser<T>,
+    ) : Option<T>(names, parser) {
+        override val required: Boolean
+            get() = false
+    }
+
+    companion object {
+        fun string(vararg names: String) =
+            Required(names.asList(), StringParser)
+
+        fun stringOrElse(vararg names: String, other: String) =
+            OrElse(names.asList(), other, StringParser)
+
+        fun stringOrNull(vararg names: String) =
+            OrNull(names.asList(), StringParser)
+
+        fun strings(vararg names: String) =
+            Variable(names.asList(), StringParser)
+
+        fun int(vararg names: String) =
+            Required(names.asList(), IntParser)
+
+        fun intOrElse(vararg names: String, other: Int) =
+            OrElse(names.asList(), other, IntParser)
+
+        fun intOrNull(vararg names: String) =
+            OrNull(names.asList(), IntParser)
+
+        fun ints(vararg names: String) =
+            Variable(names.asList(), IntParser)
+
+        fun boolean(vararg names: String) =
+            Required(names.asList(), BooleanParser)
+
+        fun booleanOrElse(vararg names: String, other: Boolean) =
+            OrElse(names.asList(), other, BooleanParser)
+
+        fun booleanOrNull(vararg names: String) =
+            OrNull(names.asList(), BooleanParser)
+
+        fun booleans(vararg names: String) =
+            Variable(names.asList(), BooleanParser)
+    }
+}