Created
June 22, 2022 02:53
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Laravel test for aggregating analytical data on software
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<?php | |
use Illuminate\Console\Command; | |
use Illuminate\Support\Facades\DB; | |
use Illuminate\Support\Facades\Cache; | |
/** | |
* Laravel command to calculate and cache logs statistics | |
*/ | |
class CalculateStatisticsCommand extends Command { | |
public function handle() { | |
// accumulator of the counts batches | |
$all_counts = collect([]); | |
// loop log items (in batch) in order to count each country code | |
// todo: possibly can be optimized to aggregate the json data in mysql itself (done in laravel for experimentation purpose) | |
DB::table('logs') | |
->orderBy('id') | |
->chunk(500, function ($logs) use (&$all_counts) { | |
// parses each log row and aggregates by country code | |
$counts = $logs->countBy(function($log) { | |
// todo: could be optimized to get countryCode from regex instead of parsing the whole json | |
$params = json_decode($log->params); | |
return $params->countryCode; | |
}); | |
// stores aggregation count for this batch in the accumulator variable | |
$all_counts->mergeRecursive($counts); | |
}); | |
// sums aggregated values for final result (not sure the data format applies for mapWithKeys, would be sure by testing with a dataset :)) | |
$final_counts = $all_counts->mapWithKeys(function ($item, $key) { | |
if (is_array($item)) { | |
$sum = array_sum($item); | |
} else { | |
$sum = $item; | |
} | |
return [$key => $sum]; | |
}); | |
// stores the resulting data in the cache store | |
Cache::put('statistics-logs-countryCode', $final_counts); | |
} | |
} |
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<?php | |
use App\Http\Controllers\Controller; | |
use Illuminate\Support\Facades\Cache; | |
class StatisticsController extends Controller { | |
public function dashboard() { | |
$countryCode = Cache::get('statistics-logs-countryCode'); | |
return view('statistics.dashboard', [ | |
'statistics' => [ | |
'countryCode' => $countryCode, | |
], | |
]); | |
} | |
} |
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