Just messing around trying to get total heating hours out of the google takeout nest summary.json file. What a pain in the ass.

nestSummaryToHeatPerHour.php

<?php
class MonthlySummary extends Summary {
  public function __toString(): string
  {
    return implode("\n", [
      '-------------------------- MONTHLY REPORT --------------------------',
      'Month of ' . $this->date . ' contained ' . $this->cycleCounts . ' Heating cycles.',
      'For a total of ' . $this->heatingInHours() . " hours.",
      "\n"
    ]);
  }
}

class DailyReport extends Summary {
  public array $cycleMessages = [];

  public function __toString(): string
  {
    return implode("\n", [
      $this->date . ' contained ' . $this->cycleCounts . ' Heating cycles.',
      'For a total of ' . $this->heatingInHours() . " hours.",
      "A cycle occurred during: \n" . implode("\n", $this->cycleMessages),
      "\n"
    ]);
  }
}

abstract class Summary {
  protected const SECONDS_TO_HOURS = 3600;
  protected const HOUSE_FIRST_FLOOR_BTU_HR = 30000;
  public string $date = '';
  public int $cycleCounts = 0;
  public int $heatingSeconds = 0;

  public function heatingInHours(): int {
    return $this->heatingSeconds / self::SECONDS_TO_HOURS;
  }

  public function hoursToBTUs(): int {
    return $this->heatingInHours() * self::HOUSE_FIRST_FLOOR_BTU_HR;
  }
}

function pathsToSummaries() {
  return [
    "/Users/user/Downloads/Takeout/Nest/thermostats/asdfadf-LivingRoom/2022/11/2022-11-summary.json",
  ];
}

function summariesToAggregate(?string $pathString ): array {
  $myfile = fopen($pathString, "r") or die("Unable to open file!");
  $contents = fread($myfile,filesize($pathString));
  fclose($myfile);
  $summary = json_decode($contents,true);
  return $summary;
}

/**
 * This might be a fuckup. Cycles don't actually seem to be heating times...
 *
 * @param array $summary
 * @return array
 */
function JSONToReports(array $summary): array {
  $MonthlySummary = new MonthlySummary();
  $dailyReports = [];
  foreach ($summary AS $day => $daySummary) {
    $DailyReport = new DailyReport();
    $DailyReport->date = substr($day,0,10);

    if (is_array($daySummary)) {
      $cycles = $daySummary['cycles'];
      $DailyReport->cycleCounts = count($cycles);

      foreach ($cycles as $cycle) {
        array_push($DailyReport->cycleMessages, $cycle['caption']['plainText']);

        //  Type of cycle and hours of run time.
        $dayHeatTimeInSeconds = (int)(explode('s', $cycle['duration'])[0]);
        $DailyReport->heatingSeconds += $dayHeatTimeInSeconds;
      }
    }

    array_push($dailyReports, $DailyReport);
    $MonthlySummary->heatingSeconds += $DailyReport->heatingSeconds;
    $MonthlySummary->cycleCounts += $DailyReport->cycleCounts;
    $MonthlySummary->date = substr($day,0,7);
  }
  return [$MonthlySummary, $dailyReports];
}

/**
 * Attempt to access events to measure hours of heating
 *
 * @param array $summary
 * @return array
 */
function heatReports(array $summary): array {
  $MonthlySummary = new MonthlySummary();
  $dailyReports = [];
  foreach ($summary AS $day => $daySummary) {
    $DailyReport = new DailyReport();
    $DailyReport->date = substr($day,0,10);

    if (is_array($daySummary)) {
      foreach ($daySummary['events'] as $event) {
        if ($event['eventType'] === 'EVENT_TYPE_HEAT'){
        //  Type of cycle and hours of run time.
        $dayHeatTimeInSeconds = (int)(explode('s', $event['duration'])[0]);
        $DailyReport->heatingSeconds += $dayHeatTimeInSeconds;
        $DailyReport->cycleCounts ++;
        }
      }
    }

    array_push($dailyReports, $DailyReport);
    $MonthlySummary->heatingSeconds += $DailyReport->heatingSeconds;
    $MonthlySummary->cycleCounts += $DailyReport->cycleCounts;
    $MonthlySummary->date = substr($day,0,7);
  }
  return [$MonthlySummary, $dailyReports];
}

function loadReports(): array {
  $reports = [];
  foreach(pathsToSummaries() as $pathString){
    $summary = summariesToAggregate($pathString);
    array_push($reports,JSONToReports($summary));
    // array_push($reports,heatReports($summary));
  }
  return $reports;
}

function refreshAndGenerateReports(bool $displayMonthly = true) {
  $reports = loadReports();
    echo "Date,HeatingInHours,EstimatedBTUs\n";
    foreach($reports as $yearReport) {
      foreach($yearReport as $report) {
        if ($report instanceof MonthlySummary && $displayMonthly) {
          echo 'Month: ' . $report->date . ','. round(($report->heatingSeconds/3600)). ',' . $report->hoursToBTUs() ."\n";
        } else if (!$displayMonthly){
            foreach ($report as $daily) {
              if ($daily instanceof DailyReport ) {
                echo $daily->date . ','. round(($daily->heatingSeconds/3600)) . ','. $daily->hoursToBTUs() . "\n";
              }
            }
        }
      }
    }
    // echo "------------START---------\n";
    // var_dump($reports);
    // echo "----------END-----------\n";

    // echo '---- On ' . $day . ' the heat ran: ' . (string)count($cycles) . " times. Total Hours: " . round($hours) . " ----\n";
    // echo 'Day total of run time: ' . $dailyHeatUsageInSeconds . " in Seconds.\n";
    // echo 'Day total of run time: ' . $minutes . " in Minutes.\n";
    // echo 'Day total of run time: ' . round($hours) . " Hours.\n";
    // CSV FORMAT
    // echo "\"" . $day . "\",". (string)count($cycles) . ',' . round($hours) . "\n";
    // Monthly average hours of heat
    // $avgHoursPerDay = array_sum($dayTotalHours) / count($dayTotalHours);
    // echo '---AVERAGE HOURS PER DAY OF RUNTIME -- ' . round($avgHoursPerDay) . "\n";
}