feat: Add Triangulation class for modular SNP comp

src/Triangulation.php

@@ -0,0 +1,28 @@
+<?php
+
+require_once 'SNPs.php';
+
+class Triangulation {
+
+    public static function compareMultipleKits($kitsData) {
+        $snpsLists = array_map(function($kit) { return $kit->getSnps(); }, $kitsData);
+        $commonSnps = call_user_func_array('array_intersect_key', $snpsLists);
+        foreach ($commonSnps as $key => $snp) {
+            if (!self::isSnpCommonAcrossAllKits($snp, $kitsData)) {
+                unset($commonSnps[$key]);
+            }
+        }
+        return array_values($commonSnps);
+    }
+
+    private static function isSnpCommonAcrossAllKits($snp, $kitsData) {
+        foreach ($kitsData as $kit) {
+            $snps = $kit->getSnps();
+            if (!array_key_exists($snp['pos'], $snps) || $snps[$snp['pos']]['genotype'] !== $snp['genotype']) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+?>