Implement input handler

src/input.zig

@@ -0,0 +1,32 @@
+const rl = @import("raylib.zig");
+
+const Input = struct {
+    name: []const u8,
+    code: i32,
+    default: i32,
+
+    pub fn isDown(self: Input) bool {
+        return rl.isKeyDown(self.code);
+    }
+    pub fn isJustPressed(self: Input) bool {
+        return rl.isKeyPressed(self.code);
+    }
+    pub fn isJustReleased(self: Input) bool {
+        return rl.isKeyReleased(self.code);
+    }
+};
+
+fn init(comptime name: []const u8, comptime key_code: []const u8) Input {
+    return Input{
+        .name = name,
+        .code = rl.getKeyCode(key_code),
+        .default = rl.getKeyCode(key_code),
+    };
+}
+
+pub const menu_left = init("Menu Left", "LEFT");
+pub const menu_right = init("Menu Right", "RIGHT");
+pub const menu_down = init("Menu Down", "DOWN");
+pub const menu_up = init("Menu Up", "UP");
+pub const menu_accept = init("Menu Accept", "ENTER");
+pub const menu_cancel = init("Menu Cancel", "BACKSPACE");

src/raylib.zig

@@ -27,6 +27,28 @@ pub fn endDrawing() void {
     c.EndDrawing();
 }
 
+pub fn getKeyCode(comptime name: []const u8) i32 {
+    const full_name = "KEY_" ++ name;
+
+    if (!@hasDecl(c, full_name)) {
+        @compileError(full_name ++ " keycode does not exist.");
+    }
+
+    return @field(c, full_name);
+}
+
+pub fn isKeyPressed(key: i32) bool {
+    return c.IsKeyPressed(key);
+}
+
+pub fn isKeyDown(key: i32) bool {
+    return c.IsKeyDown(key);
+}
+
+pub fn isKeyReleased(key: i32) bool {
+    return c.IsKeyReleased(key);
+}
+
 pub fn drawText(text: [*c]const u8, x: i32, y: i32, fontSize: i32, color: [4]u8) void {
     c.DrawText(text, x, y, fontSize, .{ .r = color[0], .g = color[1], .b = color[2], .a = color[3] });
 }