Add NameMapProvider

It returns a single NameMap combining all the maps in share/deob-map.
This will ultimately be fed into the RemapTransformer/TypedRemapper in
the deobfuscator.

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

deob-map/src/main/java/dev/openrs2/deob/map/DeobfuscatorMapModule.kt

@@ -2,6 +2,7 @@ package dev.openrs2.deob.map
 
 import com.fasterxml.jackson.databind.Module
 import com.google.inject.AbstractModule
+import com.google.inject.Scopes
 import com.google.inject.multibindings.Multibinder
 import dev.openrs2.yaml.YamlModule
 
@@ -11,5 +12,9 @@ object DeobfuscatorMapModule : AbstractModule() {
 
         Multibinder.newSetBinder(binder(), Module::class.java)
             .addBinding().to(DeobfuscatorMapJacksonModule::class.java)
+
+        bind(NameMap::class.java)
+            .toProvider(NameMapProvider::class.java)
+            .`in`(Scopes.SINGLETON)
     }
 }

deob-map/src/main/java/dev/openrs2/deob/map/NameMap.kt

@@ -2,9 +2,18 @@ package dev.openrs2.deob.map
 
 import dev.openrs2.asm.MemberRef
 import java.util.SortedMap
+import java.util.TreeMap
 
 data class NameMap(
     val classes: SortedMap<String, String>,
     val fields: SortedMap<MemberRef, Field>,
     val methods: SortedMap<MemberRef, Method>
-)
+) {
+    constructor() : this(TreeMap(), TreeMap(), TreeMap())
+
+    fun add(other: NameMap) {
+        classes.putAll(other.classes)
+        fields.putAll(other.fields)
+        methods.putAll(other.methods)
+    }
+}

deob-map/src/main/java/dev/openrs2/deob/map/NameMapProvider.kt

@@ -0,0 +1,32 @@
+package dev.openrs2.deob.map
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import java.nio.file.Files
+import java.nio.file.Path
+import java.nio.file.Paths
+import javax.inject.Inject
+import javax.inject.Provider
+
+class NameMapProvider @Inject constructor(private val mapper: ObjectMapper) : Provider<NameMap> {
+    override fun get(): NameMap {
+        val combinedMap = NameMap()
+
+        for (file in Files.list(PATH).filter(::isYamlFile)) {
+            val map = Files.newBufferedReader(file).use { reader ->
+                mapper.readValue(reader, NameMap::class.java)
+            }
+            combinedMap.add(map)
+        }
+
+        return combinedMap
+    }
+
+    private fun isYamlFile(path: Path): Boolean {
+        return Files.isRegularFile(path) && path.fileName.toString().endsWith(YAML_SUFFIX)
+    }
+
+    companion object {
+        private val PATH = Paths.get("share/deob-map")
+        private const val YAML_SUFFIX = ".yaml"
+    }
+}