Improving CLI tooltip and usage

Update README.md

.gitignore

@@ -7,4 +7,4 @@ target/
 */target
 **/target
 .bsp/*
-.bst/**/*
+.bsp/**/*

README.md

@@ -5,11 +5,34 @@ An updater for lang files for War Thunder, written in Scala
 
 You will need your existing Units.csv file and the updated version file, renamed to UnitsN.csv, something you can get from Gszabi99's repository [here](https://github.com/gszabi99/War-Thunder-Datamine).
 <br>
-Run the file like so: 
+Help file
+```shell
+$ java -jar WarThunder-Lang-Updater-0.1.0-SNAPSHOT.jar --help
+
+Usage: WarThunder Translation Updater [--input <string>] [--original <string>] [--output <string>]
+
+A tool to update the translation files for WarThunder
+
+Options and flags:
+    --help
+        Display this help text.
+    --input <string>, -i <string>
+        The input file to be updated, defaults to units.csv when not provided
+    --original <string>, -r <string>
+        The original file to be updated, defaults to unitsN.csv when not provided
+    --output <string>, -o <string>
+        The output file to be written to, defaults unitsMod.csv when not provided
 ```
-run 'file path 1' 'file path 2'
+
+Run the JAR file with the following command:
+```shell
+$ java -jar WarThunder-Lang-Updater-0.1.0-SNAPSHOT.jar --input <file path 1> --original <file path 2> --output <file path 3>
 ```
-where file path 1 and 2 are your old and new version files respectively, it can be your absolute or relative path
+
+Where `input` file is your old translations file and `original` is the translation file from the most recent WarThunder Client, it can be your absolute or relative path
+
+The `output` file is the file that will be written to, it can be absolute or relative path
+
 
 ## Can you use this for any other file other than Units.csv?
 Some of the localization files currently do not work with this program. So far I've confirmed it to work with units and units_weaponry.

build.sbt

@@ -1,11 +1,15 @@
 ThisBuild / version := "0.1.0-SNAPSHOT"
 
-ThisBuild / scalaVersion := "2.13.11"
+ThisBuild / scalaVersion := "2.13.13"
 
 ThisBuild / organization := "com.skyline.warlangmod"
 
 lazy val root = (project in file("."))
   .settings(
     name := "WarThunder Language Updater",
     assembly / mainClass := Some("com.skyline.warlangmod.Main"),
+    libraryDependencies ++= Seq(
+      "com.monovore" %% "decline" % "2.4.1",
+      "org.scalameta" %% "munit" % "0.7.29" % Test,
+    ),
   )

src/main/scala/com/skyline/warlangmod/App.scala

@@ -0,0 +1,15 @@
+package com.skyline.warlangmod
+
+import java.io.FileWriter
+
+object App {
+  def run(inputFileName: String, originalFile: String, outputFileName: String): Unit = {
+    val parsingService = ParsingService.instance
+    val translationOverwrite = TranslationOverwriteService.instance
+    val outputService = Output.instance
+    val moddedTranslations = parsingService.translations(inputFileName)
+    val originalUpdatedTranslations = parsingService.translations(originalFile)
+    val updatedModdedFile = translationOverwrite.overwrite(originalUpdatedTranslations, moddedTranslations)
+    outputService.write(updatedModdedFile, outputFileName)
+  }
+}

src/main/scala/com/skyline/warlangmod/Language.scala

@@ -1,6 +1,5 @@
 package com.skyline.warlangmod
 
-import scala.collection.mutable.ArrayBuffer
 import scala.io.BufferedSource
 import scala.util.Try
 

src/main/scala/com/skyline/warlangmod/Main.scala

@@ -1,22 +1,31 @@
 package com.skyline.warlangmod
 
-import java.io.FileWriter
+import com.monovore.decline._
 
-object Main {
-  def main(args: Array[String]): Unit = {
+import cats.implicits._
 
-    if(args.length < 2)
-      System.exit(1) // No input file
+object Main extends CommandApp(
+  name = "WarThunder Translation Updater",
+  header = "A tool to update the translation files for WarThunder ",
+  main = {
+    val defaultInFile = "units.csv"
+    val defaultOriginalFile = "unitsN.csv"
+    val defaultOutFile = "unitsMod.csv"
+    val originalFile = Opts.option[String](
+      long = "original",
+      short = "r",
+      help = s"The original file to be updated, defaults to $defaultOriginalFile when not provided").withDefault(defaultOriginalFile)
+    val inFile = Opts.option[String](
+      long = "input",
+      short = "i",
+      help = s"The input file to be updated, defaults to $defaultInFile when not provided").withDefault(defaultInFile)
+    val outFile = Opts.option[String](
+      long = "output",
+      short = "o",
+      help = s"The output file to be written to, defaults $defaultOutFile when not provided").withDefault(defaultOutFile)
 
-    val parsingService                = ParsingService()
-    val translationOverwriter         = TranslationOverwriteService()
-    val outputService                 = Output()
-
-    val moddedTranslations            = parsingService.translations(args(0))
-    val originalUpdatedTranslations   = parsingService.translations(args(1))
-
-    val uptodateModdedTranslationFile = translationOverwriter.overwrite(originalUpdatedTranslations, moddedTranslations)
-
-    outputService.write(uptodateModdedTranslationFile)
+    (inFile, originalFile, outFile).mapN {
+      (inputFileName, originalFileName, outputFileName) => App.run(inputFileName, originalFileName, outputFileName)
+    }
   }
-}
+)

src/main/scala/com/skyline/warlangmod/Output.scala

@@ -1,14 +1,17 @@
 package com.skyline.warlangmod
 
+/**
+ *  For writing the translations to a file
+ */
 trait Output {
-    def write(file: Translations): Unit
+    def write(file: Translations, outputFileName: String): Unit
 }
 
 object Output {
-  def apply(): Output = new Output {
+  lazy val instance: Output = new Output {
     import java.io.FileWriter
-    override def write(file: Translations): Unit = {
-      val updatedFile = new FileWriter("UnitsMod.csv")
+    override def write(file: Translations, outputFileName: String): Unit = {
+      val updatedFile = new FileWriter(outputFileName)
       updatedFile.write(file.render())
       updatedFile.close()
     }

src/main/scala/com/skyline/warlangmod/ParsingService.scala

@@ -1,20 +1,22 @@
 package com.skyline.warlangmod
 
+import scala.io.Source
+
+/**
+ * For parsing language/translation files of WarThunder
+ */
+
 trait ParsingService {
   def translations(filename: String): Translations
 }
 
 object ParsingService {
 
-  def apply(): ParsingService = new ParsingService {
-    import scala.io.Source
-    override def translations(filename: String): Translations = {
-      val langFile     = Source.fromFile(filename)
-      val translations = Language.parse(langFile)
-      langFile.close()
-      translations
-    }
-
+  lazy val instance: ParsingService = (filename: String) => {
+    val langFile = Source.fromFile(filename)
+    val translations = Language.parse(langFile)
+    langFile.close()
+    translations
   }
 
 }

src/main/scala/com/skyline/warlangmod/Renderable.scala

@@ -1,5 +1,8 @@
 package com.skyline.warlangmod
 
+/**
+ * A trait for objects that can be rendered as a string.
+ */
 trait Renderable {
   def render(): String
 }

src/main/scala/com/skyline/warlangmod/TranslationOverwriteService.scala

@@ -5,16 +5,15 @@ trait TranslationOverwriteService {
 }
 
 object TranslationOverwriteService {
-  def apply(): TranslationOverwriteService = new TranslationOverwriteService {
+  lazy val instance: TranslationOverwriteService = new TranslationOverwriteService {
 
     private type ObjectName = String
 
     override def overwrite(original: Translations, modded: Translations): Translations = {
       val moddedMap  = toMap(modded)
       val updated = original.languages.map { language =>
         // headOption because we only need the first translation which is english
-        // Fuck the french btw
-        val overwrittenLanguageTranslation = moddedMap.get(language.objName).getOrElse(language.translation)
+        val overwrittenLanguageTranslation = moddedMap.getOrElse(language.objName, language.translation)
         language.copy(translation = overwrittenLanguageTranslation)
       }
 

src/test/scala/com/skyline/warlangmod/ParsingServiceInstanceSpec.scala

@@ -0,0 +1,20 @@
+package com.skyline.warlangmod
+
+import java.io.FileWriter
+import java.nio.file.Files
+
+class ParsingServiceInstanceSpec extends munit.FunSuite {
+  test("ParsingServiceInstance should parse a WarThunder Translation file format") {
+    val translations = Translations(
+      languages = Vector(
+        Language("something", "good")
+      )
+    )
+    val tmpFile = Files.createTempFile("ParsingServiceInstanceTestFile", null)
+    val writer = new FileWriter(tmpFile.toFile)
+    writer.write(translations.render())
+    writer.close()
+    val parsedTranslation = ParsingService.instance.translations(tmpFile.toAbsolutePath.toString)
+    assertEquals(parsedTranslation, translations)
+  }
+}