From ac0e4eb51ca2fd595814031087039932729199ae Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Fri, 13 Oct 2023 12:36:51 -0500
Subject: implement genome parsing

---
 .gitignore                |  3 +++
 src/genome/genome.js      | 18 ++++++++++++++++++
 src/genome/genome.test.js | 16 +++++++++++++++-
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 5b8128f..2804402 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 yarn-error.log
 node_modules/
+.*
+*.swp
+*~
diff --git a/src/genome/genome.js b/src/genome/genome.js
index 71e18c1..0f7275f 100644
--- a/src/genome/genome.js
+++ b/src/genome/genome.js
@@ -1,5 +1,7 @@
 'use strict';
 
+import { network } from '../mind/topology';
+
 
 export const mutation_type = Object.freeze({
   none: 'none',
@@ -71,3 +73,19 @@ export function get_size(num_input, num_output, genome) {
     return max_index + 1;
   }
 }
+
+
+export function parse_genome(num_input, num_output, genome) {
+  const size = get_size(num_input, num_output, genome);
+  if (size < 0) {
+    // bad genome
+    throw new Error('invalid genome sequence!');
+  }
+
+  const n = genome.reduce(
+    (acc, [source, sink, weight]) => acc.connect(source, sink, weight),
+    network(num_input, size-num_input-num_output, num_output)
+  );
+
+  return n;
+}
diff --git a/src/genome/genome.test.js b/src/genome/genome.test.js
index 0ad8d80..8152f04 100644
--- a/src/genome/genome.test.js
+++ b/src/genome/genome.test.js
@@ -3,6 +3,7 @@
 import { 
   mutation_type, mutate,
   get_size,
+  parse_genome,
 } from './genome';
 
 
@@ -32,5 +33,18 @@ test('genome validation and size', () => {
 
 
 test('parse a genome into a neural net', () => {
-  
+  const n = parse_genome(1, 1, [
+    [0, 1, 1],
+    [1, 1, 1],
+    [1, 2, 1]
+  ]);
+
+  console.log(n);
+
+  expect(n.input_count).toBe(1);
+  expect(n.output_count).toBe(1);
+	expect(n.compute([2], [-1])).toEqual([
+		[ Math.tanh( Math.tanh( 2-1 ) ) ],
+		[ Math.tanh( 2-1 ) ],
+	]);
 });
-- 
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