tunables diff.php

<?php
class TunablesDiff {
	//tunable value existed before, but it's value was changed
	const TUNABLE_VALUE_CHANGED = 1;
	//tunable value didn't exist before and was just added
	const TUNABLE_NEW = 2;
	//tunable was removed from the new version
	const TUNABLE_REMOVED = 3;

	public static function SortTunables($tunableJson) {
		$temp = json_decode($tunableJson, true);
		$tempTunables = [];

		foreach ($temp['tunables'] as $key => $tunableType) {
			foreach ($tunableType as $tunableValue) {
				$tempTunables[$key] = $tunableValue['value'];
			}
		}
		return $tempTunables;
	}

	public static function CompareTunables($newTunablesArray, $oldTunablesArray) {
		$changedTunables = [];
		foreach ($newTunablesArray as $newTunablesName => $newTunablesValue) {
			//tunable is new, so add it to the list as a new one
			if (!array_key_exists($newTunablesName, $oldTunablesArray)) {
				$changedTunables[$newTunablesName] = [
					"newValue" => $newTunablesValue,
					"type" => self::TUNABLE_NEW
				];
			} else {
				//tunable exists but was changed, so add it as a changed value
				if ($newTunablesValue != $oldTunablesArray[$newTunablesName]) {
					$changedTunables[$newTunablesName] = [
						"newValue" => $newTunablesValue,
						"oldValue" => $oldTunablesArray[$newTunablesName],
						"type" => self::TUNABLE_VALUE_CHANGED
					];
				}
			}
		}
		foreach ($oldTunablesArray as $oldTunablesName => $oldTunablesValue) {
			if (!array_key_exists($oldTunablesName, $newTunablesArray)) {
					$changedTunables[$oldTunablesName] = [
						"oldValue" => $oldTunablesValue,
						"type" => self::TUNABLE_REMOVED
					];
			}
		}
		return $changedTunables;
	}
}
//pulled from ros cloud
$newTunables = TunablesDiff::SortTunables(file_get_contents('newest.json'));
//pull the last stored json from database or whatever
$oldTunables = TunablesDiff::SortTunables(file_get_contents('old.json'));


$diff = TunablesDiff::CompareTunables($newTunables, $oldTunables);

foreach ($diff as $changedTunableName => $changedTunable) {
	if ($changedTunable['type'] == TunablesDiff::TUNABLE_NEW) {
		echo "$changedTunableName has been added with value $changedTunable[newValue]\n";
	} else if ($changedTunable['type'] == TunablesDiff::TUNABLE_VALUE_CHANGED) {
		echo "$changedTunableName is now $changedTunable[newValue] (was $changedTunable[oldValue])\n";
	} else if ($changedTunable['type'] == TunablesDiff::TUNABLE_REMOVED) {
		echo "$changedTunableName was removed (old value was $changedTunable[oldValue])\n";
	}
}