Add config file parser

Signed-off-by: Graham <gpe@openrs2.dev>

all/build.gradle.kts

@@ -50,6 +50,9 @@ distributions {
             from("${rootProject.projectDir}/DCO")
             from("${rootProject.projectDir}/LICENSE")
             from("${rootProject.projectDir}/README.md")
+            from("${rootProject.projectDir}/etc/config.example.yaml") {
+                into("etc")
+            }
             from("${rootProject.projectDir}/share") {
                 exclude(".*", "*~")
                 into("share")

conf/build.gradle.kts

@@ -0,0 +1,26 @@
+plugins {
+    `maven-publish`
+    kotlin("jvm")
+}
+
+dependencies {
+    api("com.google.inject:guice:${Versions.guice}")
+
+    implementation(project(":yaml"))
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 Configuration")
+            description.set(
+                """
+                Provides a parser for OpenRS2's main configuration file.
+            """.trimIndent()
+            )
+        }
+    }
+}

conf/src/main/java/dev/openrs2/conf/Config.kt

@@ -0,0 +1,23 @@
+package dev.openrs2.conf
+
+data class Config(
+    val game: String,
+    val operator: String,
+    val domain: String
+) {
+    val internalGame: String
+    val internalOperator: String
+
+    init {
+        internalGame = game.toInternalName()
+        internalOperator = operator.toInternalName()
+    }
+
+    companion object {
+        private val INTERNAL_NAME_REGEX = Regex("(?i)[^a-z0-9]+")
+
+        private fun String.toInternalName(): String {
+            return replace(INTERNAL_NAME_REGEX, "_").trim('_').toLowerCase()
+        }
+    }
+}

conf/src/main/java/dev/openrs2/conf/ConfigModule.kt

@@ -0,0 +1,15 @@
+package dev.openrs2.conf
+
+import com.google.inject.AbstractModule
+import com.google.inject.Scopes
+import dev.openrs2.yaml.YamlModule
+
+class ConfigModule : AbstractModule() {
+    override fun configure() {
+        install(YamlModule())
+
+        bind(Config::class.java)
+            .toProvider(ConfigProvider::class.java)
+            .`in`(Scopes.SINGLETON)
+    }
+}

conf/src/main/java/dev/openrs2/conf/ConfigProvider.kt

@@ -0,0 +1,24 @@
+package dev.openrs2.conf
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import java.nio.file.Files
+import java.nio.file.Paths
+import javax.inject.Inject
+import javax.inject.Provider
+
+class ConfigProvider @Inject constructor(private val mapper: ObjectMapper) : Provider<Config> {
+    override fun get(): Config {
+        if (Files.notExists(CONFIG_PATH)) {
+            Files.copy(EXAMPLE_CONFIG_PATH, CONFIG_PATH)
+        }
+
+        return Files.newBufferedReader(CONFIG_PATH).use { reader ->
+            mapper.readValue(reader, Config::class.java)
+        }
+    }
+
+    companion object {
+        private val CONFIG_PATH = Paths.get("etc/config.yaml")
+        private val EXAMPLE_CONFIG_PATH = Paths.get("etc/config.example.yaml")
+    }
+}

etc/.gitignore

@@ -1,3 +1,4 @@
+/config.yaml
 /loader.p12
 /private.key
 /public.key

etc/config.example.yaml

@@ -0,0 +1,10 @@
+---
+# The name of the game. All references to "RuneScape" are replaced with this
+# string.
+game: OpenRS2
+# The name of the organisation running the game. All references to "Jagex" are
+# replaced with this string.
+operator: OpenRS2
+# The game's domain name. All references to "runescape.com" are replaced with
+# this string. It should, at a minimum, have `www` and `www-wtqa` hostnames.
+domain: openrs2.dev

settings.gradle.kts

@@ -9,6 +9,7 @@ include(
     "cli",
     "compress",
     "compress-cli",
+    "conf",
     "crc32",
     "crypto",
     "decompiler",