Price Tracker India

tracker.php

<?php

use DiDom\Document;
use Stringy\Stringy as S;

class tracker
{
    public function __construct()
    {
        $this->priceTrack();
    }

    private function priceTrack()
    {
        $savePath = "petrol_price_data.json";
        $saveData = file_exists($savePath) ? json_decode(file_get_contents($savePath), true) : [];
        $priviousPrice = "https://www.iocl.com/Product_PreviousPrice/PetrolPreviousPrice.aspx";
        $currentPrice = "https://www.iocl.com/Product_PreviousPrice/PetrolPreviousPriceDynamic.aspx";

        if (empty($saveData)) {
            $this->getPriceDataOfUrl($currentPrice, $saveData);
            $this->getPriceDataOfUrl($priviousPrice, $saveData);
            file_put_contents($savePath, json_encode($saveData));
        }
        $governments = [
            [
                'name' => 'Manmohan Singh',
                'term_from' => ("2004-05"),
                'term_to' => ("2009-05"),
                'data' => []
            ],
            [
                'name' => 'Manmohan Singh',
                'term_from' => ("2009-05"),
                'term_to' => ("2014-05"),
                'data' => []
            ],
            [
                'name' => 'Narendra Modi',
                'term_from' => ("2014-05"),
                'term_to' => ("2019-05"),
                'data' => []
            ]
        ];

        foreach ($saveData['data'] as $month => $datum) {
            $monthTime = strtotime($month);
            foreach ($governments as $governmentKey => $government) {
                if ($monthTime >= strtotime($government['term_from']) && $monthTime <= strtotime($government['term_to'])) {
                    $governments[$governmentKey]['data'][date('Y', strtotime($month))][date('m', strtotime($month))] = array_first($datum);
                }
            }
        }

        echo "Prices is based on IndianOil | " . $priviousPrice;
        echo " | " . $currentPrice . "\n";
        echo "Below Prices are for the " . join(",", $saveData['head']) . ' cities' . " \n\n";
        echo "Code: https://gist.github.com/Rajeshr34/8da62f0adab4e7b5f5a4d026ae53979e \n\n";

        foreach ($governments as $government) {
            echo "Governament : " . $government['name'] . "\n";
            echo "Term From : " . $government['term_from'] . "\n";
            echo "Term TO : " . $government['term_to'] . "\n";
            ksort($government['data']);
            $startingTermPrice = 0;
            foreach ($government['data'] as $year => $datum) {
                echo "\nYear : " . $year . "\n";
                ksort($datum);
                $startPrice = 0;
                $endPrice = 0;
                foreach ($datum as $month => $item) {
                    if ($startPrice == 0)
                        $startPrice = end($item);
                    $endPrice = end($item);
                    echo 'Month: ' . $month . " | " . join(' , ', $item) . "\n";
                }
                $diff = round(($endPrice - $startPrice), 2);
                echo "Start Price $startPrice | End Price $endPrice | Diff " . $diff . "\n";
                $startingTermPrice += $diff;
            }
            echo "\n\nAt the end of term Price Difference is " . $startingTermPrice;
            echo "\n\n\n\n------------\n\n\n\n";
        }
        exit;
    }

    private function getPriceDataOfUrl($url, &$output)
    {
        $data = file_get_contents($url);
        $document = new Document($data);
        $table = $document->first('.wrapper-table');
        $theadTD = $table->find("thead tr td");
        foreach ($theadTD as $lp => $item) {
            if ($lp != 0) {
                $output['head'][$lp] = $item->text();
            }
        }
        $bodyTR = $table->find("tbody .generic-table.general-table tr");
        foreach ($bodyTR as $itemObject) {
            $TDItems = $itemObject->find('td');
            $date = date('d', strtotime($TDItems[0]->text()));
            $month = date('Y-m', strtotime($TDItems[0]->text()));
            foreach ($TDItems as $itemK => $itemV) {
                if ($itemK != 0) {
                    $output['data'][$month][$date][] = S::create($itemV->text())->stripWhitespace()->__toString();
                }
            }
        }
    }

}