init kicad json serialization w/ test

biome.json

@@ -3,6 +3,11 @@
   "organizeImports": {
     "enabled": true
   },
+  "javascript": {
+    "formatter": {
+      "semicolons": "asNeeded"
+    }
+  },
   "linter": {
     "enabled": true,
     "rules": {

package.json

@@ -35,6 +35,7 @@
     "@types/debug": "^4.1.12",
     "@types/node": "^20.14.2",
     "@types/prompts": "^2.4.9",
+    "@types/uuid": "^10.0.0",
     "ava": "^6.1.3",
     "commander": "^12.1.0",
     "debug": "^4.3.5",
@@ -51,6 +52,7 @@
     "@tscircuit/props": "^0.0.6",
     "prettier": "^3.3.1",
     "s-expression": "^3.1.1",
+    "uuid": "^10.0.0",
     "zod": "^3.23.8"
   }
 }

src/convert-kicad-json-to-kicad-mod.ts

@@ -0,0 +1,112 @@
+import { v4 as uuidv4 } from "uuid"
+import type { KicadModJson } from "./kicad-zod"
+import { serializeSExpression } from "./utils/serialize-s-expression"
+
+export const convertKicadJsonToKicadMod = (kicadJson: KicadModJson): string => {
+	const sexpr: any[] = [
+		"footprint",
+		kicadJson.footprint_name ?? "Adafruit_Feather",
+		["version", kicadJson.version ?? 20240108],
+		["generator", kicadJson.generator ?? "pcbnew"],
+		["generator_version", kicadJson.generator_version ?? "8.0"],
+		["layer", kicadJson.layer ?? "F.Cu"],
+		[
+			"descr",
+			kicadJson.descr ??
+				"Common footprint for the Adafruit Feather series of boards, https://learn.adafruit.com/adafruit-feather/feather-specification",
+		],
+		["tags", kicadJson.tags ?? "Adafruit Feather"],
+		...(kicadJson.properties
+			? kicadJson.properties.map((p) => [
+					"property",
+					p.key,
+					p.val,
+					p.attributes?.at && ["at", ...p.attributes.at],
+					["unlocked", "yes"],
+					p.attributes?.layers && ["layer", p.attributes.layers[0]],
+					["hide", "yes"],
+					p.attributes?.uuid && ["uuid", p.attributes.uuid],
+					[
+						"effects",
+						[
+							"font",
+							p.attributes?.size && ["size", ...p.attributes.size],
+							["thickness", 0.15],
+						],
+					],
+				])
+			: []),
+		["clearance", 0.2],
+		["attr", "through_hole"],
+		...(kicadJson.fp_lines.length > 0
+			? kicadJson.fp_lines.map((line) => [
+					"fp_line",
+					line.start && ["start", ...line.start],
+					line.end && ["end", ...line.end],
+					line.stroke && [
+						"stroke",
+						line.stroke.width && ["width", line.stroke.width],
+						line.stroke.type && ["type", line.stroke.type],
+					],
+					["layer", line.layer],
+					line.uuid && ["uuid", line.uuid],
+				])
+			: []),
+		...(kicadJson.fp_arcs.length > 0
+			? kicadJson.fp_arcs.map((arc) => [
+					"fp_arc",
+					arc.start && ["start", ...arc.start],
+					arc.mid && ["mid", ...arc.mid],
+					arc.end && ["end", ...arc.end],
+					arc.stroke && [
+						"stroke",
+						arc.stroke.width && ["width", arc.stroke.width],
+						arc.stroke.type && ["type", arc.stroke.type],
+					],
+					["layer", arc.layer],
+					arc.uuid && ["uuid", arc.uuid],
+				])
+			: []),
+		...(kicadJson.fp_texts.length > 0
+			? kicadJson.fp_texts.map((text) => [
+					"fp_text",
+					text.fp_text_type,
+					text.text,
+					text.at && ["at", ...text.at],
+					["layer", text.layer],
+					["uuid", text.uuid ?? uuidv4()],
+					text.effects && [
+						"effects",
+						[
+							"font",
+							text.effects.font?.size && ["size", ...text.effects.font.size],
+							["thickness", text.effects.font?.thickness ?? 0.15],
+						],
+					],
+				])
+			: []),
+		...(kicadJson.pads.length > 0
+			? kicadJson.pads.map((pad) => [
+					"pad",
+					pad.name,
+					pad.pad_type,
+					pad.pad_shape ?? "oval",
+					pad.at && ["at", ...pad.at],
+					pad.size && ["size", ...pad.size],
+					["drill", 1, ["offset", 0.3, 0]],
+					pad.layers && ["layers", ...pad.layers],
+					["remove_unused_layers", "no"],
+					["uuid", pad.uuid ?? uuidv4()],
+				])
+			: []),
+		[
+			"model",
+			`{KICAD8_3DMODEL_DIR}/Module.3dshapes/${kicadJson.footprint_name}.wrl`,
+			["offset", ["xyz", 0, 0, 0]],
+			["scale", ["xyz", 1, 1, 1]],
+			["rotate", ["xyz", 0, 0, 0]],
+		],
+	].filter(Boolean)
+
+	return serializeSExpression(sexpr)
+}