Removed a dependency from container and added basic audio support.

core/container.d

@@ -7,7 +7,6 @@
 module popka.core.container;
 
 import lib = core.stdc.stdlib;
-import popka.core.fmt;
 
 @safe @nogc nothrow:
 
@@ -168,9 +167,9 @@ struct FlagList(T) {
         openIndex = list.openIndex;
     }
 
-    ref T opIndex(size_t i, const(char)[] file = __FILE__, size_t line = __LINE__) {
+    ref T opIndex(size_t i) {
         if (!flags[i]) {
-            assert(0, "{}({}): ID {} doesn't exist.".fmt(file, line, i));
+            assert(0, "ID doesn't exist.");
         }
         return data[i];
     }
@@ -183,7 +182,7 @@ struct FlagList(T) {
 
     void opIndexOpAssign(string op)(T rhs, size_t i, const(char)[] file = __FILE__, size_t line = __LINE__) {
         if (!flags[i]) {
-            assert(0, "{}({}): ID {} doesn't exist.".fmt(file, line, i));
+            assert(0, "ID doesn't exist.");
         }
         mixin("data[i] " ~ op ~ "= rhs;");
     }
@@ -219,9 +218,9 @@ struct FlagList(T) {
         }
     }
 
-    void remove(size_t i, const(char)[] file = __FILE__, size_t line = __LINE__) {
+    void remove(size_t i) {
         if (!flags[i]) {
-            assert(0, "{}({}): ID {} doesn't exist.".fmt(file, line, i));
+            assert(0, "ID doesn't exist.");
         }
         flags[i] = false;
         hotIndex = i;

game/engine.d

@@ -144,6 +144,51 @@ struct View {
     }
 }
 
+// TODO: Needs a lot of testing and changing.
+// NOTE: This should handle sounds and music.
+// NOTE: I added this basic layer to use it for a visual novel.
+struct AudioAsset {
+    ray.Music data;
+
+    @safe @nogc nothrow:
+
+    this(const(char)[] path) {
+        load(path);
+    }
+
+    bool isEmpty() {
+        return data.stream.sampleRate == 0;
+    }
+
+    void load(const(char)[] path) {
+        free();
+        ray.LoadMusicStream(toStrz(path));
+    }
+
+    void free() {
+        if (!isEmpty) {
+            ray.UnloadMusicStream(data);
+            data = ray.Music();
+        }
+    }
+
+    void play() {
+        ray.PlayMusicStream(data);
+    }
+
+    void stop() {
+        ray.StopMusicStream(data);
+    }
+
+    void pause() {
+        ray.PauseMusicStream(data);
+    }
+
+    void resume() {
+        ray.ResumeMusicStream(data);
+    }
+}
+
 struct TileMap {
     Grid!short data;
     alias data this;