154 lines
4.6 KiB
PHP
154 lines
4.6 KiB
PHP
<?php
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namespace germanairlinesva\file\logbook;
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require_once "Recording.php";
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class Logbook
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{
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private const file_name = "/logbook.bin";
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private const recordings_directory = "/recordings/";
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private const ident = "VGAL";
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private const header_unpack = "a4ident/Cversion";
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private const variable_string_size_unpack = "Clength";
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private const flight_start_unpack = "a10date/a1flightType/a4flightNumber/a4aircraftType/a6aircraftRegistration";
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private const flight_middle_unpack = "a5offBlockTime/a5outTime/a5inTime/a5onBlockTime/gtotalFlightTime/" .
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"gtaxiOutFuel/ginFlightFuel/gtaxiInFuel/gtotalFuel/gtaxiOutDistance/ginFlightDistance/gtaxiInDistance/" .
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"gtotalDistance/gmaxLandingRate/Ctouchdowns/gmaxLandingGees";
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private const flight_end_unpack = "gpoints/Cflags";
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private string $directory_name = "";
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private array $flights = [];
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public function __construct(string $directory)
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{
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$this->directory_name = $directory;
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$this->read();
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}
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/**
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* Generates a json representation
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*
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* @return array json representation
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*/
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public function to_json(): array
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{
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$retVal = [];
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foreach ($this->flights as $flight) {
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try {
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$rec = new \germanairlinesva\file\recording\Recording($this->directory_name .
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Logbook::recordings_directory . $flight["recordingFilename"] . ".rec");
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$flight["recording"] = $rec->to_json();
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} catch (\InvalidArgumentException) {
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}
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array_push($retVal, $flight);
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}
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return $retVal;
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}
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/**
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* Generates a string json representation
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*
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* @return string json string representation
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*/
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public function to_json_string(): string
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{
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return json_encode($this->to_json());
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}
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/**
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* Reads logbook
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*/
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private function read()
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{
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$file = fopen($this->directory_name . Logbook::file_name, "rb");
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flock($file, LOCK_SH);
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$version = $this->read_header($file);
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if ($version == 1) {
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while ($this->read_flight_1($file) != false);
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}
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flock($file, LOCK_UN);
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fclose($file);
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}
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/**
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* Reads one flight entry
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*
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* @param resource $file File handle
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*
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* @return true if not EOF
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* @return false if EOF
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*
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* @throws InvalidArgumentException If file is not a resource
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*/
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private function read_flight_1($file): bool
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{
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if (false === is_resource($file)) {
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throw new \InvalidArgumentException(sprintf('Argument must be a valid resource type. %s given.', gettype($file)));
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}
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$retVal = [];
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$data = fread($file, 25);
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if ($data) {
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$retVal = array_merge($retVal, unpack(Logbook::flight_start_unpack, $data));
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$size = unpack(Logbook::variable_string_size_unpack, fread($file, 1))["length"];
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$retVal["departureAirport"] = fread($file, $size);
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$size = unpack(Logbook::variable_string_size_unpack, fread($file, 1))["length"];
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$retVal["departureGate"] = fread($file, $size);
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$size = unpack(Logbook::variable_string_size_unpack, fread($file, 1))["length"];
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$retVal["departureRunway"] = fread($file, $size);
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$size = unpack(Logbook::variable_string_size_unpack, fread($file, 1))["length"];
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$retVal["arrivalAirport"] = fread($file, $size);
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$size = unpack(Logbook::variable_string_size_unpack, fread($file, 1))["length"];
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$retVal["arrivalGate"] = fread($file, $size);
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$size = unpack(Logbook::variable_string_size_unpack, fread($file, 1))["length"];
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$retVal["arrivalRunway"] = fread($file, $size);
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$retVal = array_merge($retVal, unpack(Logbook::flight_middle_unpack, fread($file, 65)));
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$size = unpack(Logbook::variable_string_size_unpack, fread($file, 1))["length"];
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$retVal["recordingFilename"] = fread($file, $size);
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$retVal = array_merge($retVal, unpack(Logbook::flight_end_unpack, fread($file, 5)));
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array_push($this->flights, $retVal);
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return true;
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}
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return false;
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}
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/**
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* Reads the file header
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*
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* @param resource $file File handle
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*
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* @return string File version
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*
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* @throws InvalidArgumentException If file is not a resource
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* @throws UnexpectedValueException If ident mismatches
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*/
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private function read_header($file): string
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{
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if (false === is_resource($file)) {
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throw new \InvalidArgumentException(sprintf('Argument must be a valid resource type. %s given.', gettype($file)));
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}
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$header = unpack(Logbook::header_unpack, fread($file, 5));
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if ($header["ident"] !== Logbook::ident) {
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throw
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new \UnexpectedValueException(sprintf("Ident mismatch. Got %s, expected %s", $header["ident"], Logbook::ident));
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}
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return $header["version"];
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}
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}
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