add calc coverage scripts

composer.json

@@ -41,6 +41,7 @@
         }
     },
     "require-dev": {
+        "ext-simplexml": "*",
         "phpunit/phpunit": "^7.0.0",
         "mockery/mockery": "^1.2",
         "mikey179/vfsStream": "^1.6"

scripts/coverage_calc.php

@@ -0,0 +1,35 @@
+<?php
+// coverage-badger.php
+$inputFile = $argv[1];
+$outputFile = $argv[2];
+if (!file_exists($inputFile)) {
+    throw new InvalidArgumentException('Invalid input file provided');
+}
+$xml = new \SimpleXMLElement(file_get_contents($inputFile));
+$metrics = $xml->xpath('//metrics');
+$totalElements = 0;
+$checkedElements = 0;
+foreach ($metrics as $metric) {
+    $totalElements += (int)$metric['elements'];
+    $checkedElements += (int)$metric['coveredelements'];
+}
+$coverage = (int)(($totalElements === 0) ? 0 : ($checkedElements / $totalElements) * 100);
+$template = file_get_contents(__DIR__ . '/templates/flat.svg');
+$template = str_replace('{{ total }}', $coverage, $template);
+$color = '#a4a61d';      // Default Gray
+if ($coverage < 40) {
+    $color = '#e05d44';  // Red
+} elseif ($coverage < 60) {
+    $color = '#fe7d37';  // Orange
+} elseif ($coverage < 75) {
+    $color = '#dfb317';  // Yellow
+} elseif ($coverage < 90) {
+    $color = '#a4a61d';  // Yellow-Green
+} elseif ($coverage < 95) {
+    $color = '#97CA00';  // Green
+} elseif ($coverage <= 100) {
+    $color = '#4c1';     // Bright Green
+}
+$template = str_replace('{{ total }}', $coverage, $template);
+$template = str_replace('{{ color }}', $color, $template);
+file_put_contents($outputFile, $template);