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| 1 | <?php |
| 2 | |
| 3 | namespace Wikimedia\WRStats; |
| 4 | |
| 5 | /** |
| 6 | * Class representation of normalized metric specifications |
| 7 | * |
| 8 | * @internal |
| 9 | */ |
| 10 | class MetricSpec { |
| 11 | /** The default (value axis) resolution */ |
| 12 | public const DEFAULT_RESOLUTION = 1; |
| 13 | |
| 14 | /** @var string */ |
| 15 | public $type; |
| 16 | /** @var float|int */ |
| 17 | public $resolution; |
| 18 | /** @var array<string,SequenceSpec> Sequences in ascending order of expiry */ |
| 19 | public $sequences; |
| 20 | |
| 21 | /** |
| 22 | * @param array $spec |
| 23 | */ |
| 24 | public function __construct( array $spec ) { |
| 25 | $this->type = $spec['type'] ?? 'counter'; |
| 26 | $this->resolution = $spec['resolution'] ?? self::DEFAULT_RESOLUTION; |
| 27 | foreach ( [ 'timeStep', 'expiry' ] as $var ) { |
| 28 | if ( isset( $spec[$var] ) ) { |
| 29 | throw new WRStatsError( "$var must be in the sequences array" ); |
| 30 | } |
| 31 | } |
| 32 | $seqArrays = $spec['sequences'] ?? []; |
| 33 | if ( !$seqArrays ) { |
| 34 | $seqArrays = [ [] ]; |
| 35 | } |
| 36 | $sequences = []; |
| 37 | foreach ( $seqArrays as $i => $seqArray ) { |
| 38 | if ( !is_array( $seqArray ) ) { |
| 39 | throw new WRStatsError( 'sequences must be an array of arrays' ); |
| 40 | } |
| 41 | $seqSpec = new SequenceSpec( $seqArray ); |
| 42 | while ( isset( $sequences[$seqSpec->name] ) ) { |
| 43 | $seqSpec->name .= "s$i"; |
| 44 | } |
| 45 | $sequences[$seqSpec->name] = $seqSpec; |
| 46 | } |
| 47 | uasort( $sequences, static function ( SequenceSpec $a, SequenceSpec $b ) { |
| 48 | return $a->hardExpiry <=> $b->hardExpiry; |
| 49 | } ); |
| 50 | $this->sequences = $sequences; |
| 51 | } |
| 52 | } |