Chamfer is just a fancy fillet so easy to add (#2681)

* add chamfer

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* generate docs

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* generate docs

Signed-off-by: Jess Frazelle <github@jessfraz.com>

---------

Signed-off-by: Jess Frazelle <github@jessfraz.com>

src/wasm-lib/kcl/src/std/chamfer.rs

@@ -0,0 +1,126 @@
+//! Standard library chamfers.
+
+use anyhow::Result;
+use derive_docs::stdlib;
+use kittycad::types::ModelingCmd;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    errors::{KclError, KclErrorDetails},
+    executor::{ExtrudeGroup, MemoryItem},
+    std::Args,
+};
+
+pub(crate) const DEFAULT_TOLERANCE: f64 = 0.0000001;
+
+/// Data for chamfers.
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, ts_rs::TS, JsonSchema)]
+#[ts(export)]
+#[serde(rename_all = "camelCase")]
+pub struct ChamferData {
+    /// The radius of the chamfer.
+    pub radius: f64,
+    /// The tags of the paths you want to chamfer.
+    pub tags: Vec<EdgeReference>,
+}
+
+/// A string or a uuid.
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, ts_rs::TS, JsonSchema, Ord, PartialOrd, Eq, Hash)]
+#[ts(export)]
+#[serde(untagged)]
+pub enum EdgeReference {
+    /// A uuid of an edge.
+    Uuid(uuid::Uuid),
+    /// A tag name of an edge.
+    Tag(String),
+}
+
+/// Create chamfers on tagged paths.
+pub async fn chamfer(args: Args) -> Result<MemoryItem, KclError> {
+    let (data, extrude_group): (ChamferData, Box<ExtrudeGroup>) = args.get_data_and_extrude_group()?;
+
+    let extrude_group = inner_chamfer(data, extrude_group, args).await?;
+    Ok(MemoryItem::ExtrudeGroup(extrude_group))
+}
+
+/// Create chamfers on tagged paths.
+///
+/// ```no_run
+/// const width = 20
+/// const length = 10
+/// const thickness = 1
+/// const chamferRadius = 2
+///
+/// const mountingPlateSketch = startSketchOn("XY")
+///   |> startProfileAt([-width/2, -length/2], %)
+///   |> lineTo([width/2, -length/2], %, 'edge1')
+///   |> lineTo([width/2, length/2], %, 'edge2')
+///   |> lineTo([-width/2, length/2], %, 'edge3')
+///   |> close(%, 'edge4')
+///
+/// const mountingPlate = extrude(thickness, mountingPlateSketch)
+///   |> chamfer({
+///     radius: chamferRadius,
+///     tags: [
+///       getNextAdjacentEdge('edge1', %),
+///       getNextAdjacentEdge('edge2', %),
+///       getNextAdjacentEdge('edge3', %),
+///       getNextAdjacentEdge('edge4', %)
+///     ],
+///   }, %)
+/// ```
+#[stdlib {
+    name = "chamfer",
+}]
+async fn inner_chamfer(
+    data: ChamferData,
+    extrude_group: Box<ExtrudeGroup>,
+    args: Args,
+) -> Result<Box<ExtrudeGroup>, KclError> {
+    // Check if tags contains any duplicate values.
+    let mut tags = data.tags.clone();
+    tags.sort();
+    tags.dedup();
+    if tags.len() != data.tags.len() {
+        return Err(KclError::Type(KclErrorDetails {
+            message: "Duplicate tags are not allowed.".to_string(),
+            source_ranges: vec![args.source_range],
+        }));
+    }
+
+    for tag in data.tags {
+        let edge_id = match tag {
+            EdgeReference::Uuid(uuid) => uuid,
+            EdgeReference::Tag(tag) => {
+                extrude_group
+                    .sketch_group_values
+                    .iter()
+                    .find(|p| p.get_name() == tag)
+                    .ok_or_else(|| {
+                        KclError::Type(KclErrorDetails {
+                            message: format!("No edge found with tag: `{}`", tag),
+                            source_ranges: vec![args.source_range],
+                        })
+                    })?
+                    .get_base()
+                    .geo_meta
+                    .id
+            }
+        };
+
+        args.send_modeling_cmd(
+            uuid::Uuid::new_v4(),
+            ModelingCmd::Solid3DFilletEdge {
+                edge_id,
+                object_id: extrude_group.id,
+                radius: data.radius,
+                tolerance: DEFAULT_TOLERANCE, // We can let the user set this in the future.
+                cut_type: Some(kittycad::types::CutType::Chamfer),
+            },
+        )
+        .await?;
+    }
+
+    Ok(extrude_group)
+}