From d005bb24345f2c7b2a34835e33390bfedef3f6a6 Mon Sep 17 00:00:00 2001
From: "Claire V. Hammond" <cvhammond@mailbox.org>
Date: Sat, 6 Jan 2024 21:55:02 -0800
Subject: [PATCH] initial builder commit

---
 src/builder.rs | 38 ++++++++++++++++++++++++++++++++++++++
 src/lib.rs     | 12 ++----------
 2 files changed, 40 insertions(+), 10 deletions(-)
 create mode 100644 src/builder.rs

diff --git a/src/builder.rs b/src/builder.rs
new file mode 100644
index 0000000..1f03be2
--- /dev/null
+++ b/src/builder.rs
@@ -0,0 +1,38 @@
+//! The builder module is focused on building a C3d struct for writing to a file.
+//! It is focused on composing parts into a valid C3d struct.
+
+use crate::c3d::C3d;
+use std::{error::Error, fmt};
+
+/// The C3dBuilder is a struct that is used to build a C3d struct.
+#[derive(Debug, Default)]
+pub struct C3dBuilder {
+    pub(crate) c3d: C3d,
+}
+
+impl C3dBuilder {
+    /// Creates a new C3dBuilder.
+    pub fn new() -> Self {
+        C3dBuilder {
+            c3d: C3d::default(),
+        }
+    }
+
+    /// Consumes the builder and returns a C3d struct.
+    pub fn build(self) -> C3d {
+        self.c3d
+    }
+}
+
+/// Reports errors in building a C3d struct.
+#[derive(Debug)]
+pub enum C3dBuilderError {
+    InvalidParameter,
+}
+
+impl Error for C3dBuilderError {}
+impl fmt::Display for C3dBuilderError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "C3dBuilderError: {:?}", self)
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index a809f99..4123a1c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,26 +14,17 @@
 use std::path::PathBuf;
 use std::{error::Error, fmt};
 
-#[path = "analog.rs"]
 pub mod analog;
-#[path = "c3d.rs"]
 pub mod c3d;
-#[path = "data.rs"]
 pub mod data;
-#[path = "events.rs"]
 pub mod events;
-#[path = "forces.rs"]
 pub mod forces;
-#[path = "manufacturer.rs"]
 pub mod manufacturer;
-#[path = "parameters.rs"]
 pub mod parameters;
-#[path = "points.rs"]
 pub mod points;
-#[path = "processor.rs"]
 mod processor;
-#[path = "seg.rs"]
 pub mod seg;
+pub mod builder;
 
 #[path = "file_formats/mod.rs"]
 pub mod file_formats;
@@ -41,6 +32,7 @@ pub mod file_formats;
 pub use analog::Analog;
 pub use analog::AnalogFormat;
 pub use analog::AnalogOffset;
+pub use builder::C3dBuilder;
 pub use c3d::C3d;
 pub use data::DataFormat;
 pub use data::MarkerPoint;