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| 1 | <?php |
| 2 | |
| 3 | namespace GeoData; |
| 4 | |
| 5 | use JsonSerializable; |
| 6 | |
| 7 | /** |
| 8 | * Class representing coordinates |
| 9 | */ |
| 10 | class Coord implements JsonSerializable { |
| 11 | |
| 12 | /** Mapping from properties of this class to database columns */ |
| 13 | public const FIELD_MAPPING = [ |
| 14 | 'id' => 'gt_id', |
| 15 | 'lat' => 'gt_lat', |
| 16 | 'lon' => 'gt_lon', |
| 17 | 'globe' => 'gt_globe', |
| 18 | 'primary' => 'gt_primary', |
| 19 | 'dim' => 'gt_dim', |
| 20 | 'type' => 'gt_type', |
| 21 | 'name' => 'gt_name', |
| 22 | 'country' => 'gt_country', |
| 23 | 'region' => 'gt_region', |
| 24 | ]; |
| 25 | |
| 26 | /** @var float Latitude of the point in degrees */ |
| 27 | public $lat; |
| 28 | |
| 29 | /** @var float Longitude of the point in degrees */ |
| 30 | public $lon; |
| 31 | |
| 32 | /** @var int Tag id, needed for selective replacement and paging */ |
| 33 | public $id; |
| 34 | |
| 35 | /** Name of planet or other astronomic body on which the coordinates reside */ |
| 36 | public string $globe; |
| 37 | |
| 38 | /** @var bool Whether this coordinate is primary |
| 39 | * (defines the principal location of article subject) or secondary (just mentioned in text) |
| 40 | */ |
| 41 | public $primary = false; |
| 42 | |
| 43 | /** @var int|null Approximate viewing radius in meters, gives an idea how large the object is */ |
| 44 | public $dim; |
| 45 | |
| 46 | /** @var string|null Type of the point */ |
| 47 | public $type; |
| 48 | |
| 49 | /** @var string|null Point name on the map */ |
| 50 | public $name; |
| 51 | |
| 52 | /** @var string|null Two character ISO 3166-1 alpha-2 country code */ |
| 53 | public $country; |
| 54 | |
| 55 | /** @var string|null Second part of ISO 3166-2 region code, up to 3 alphanumeric chars */ |
| 56 | public $region; |
| 57 | |
| 58 | /** @var int */ |
| 59 | public $pageId; |
| 60 | |
| 61 | /** @var float Distance in meters */ |
| 62 | public $distance; |
| 63 | |
| 64 | /** |
| 65 | * @param float $lat |
| 66 | * @param float $lon |
| 67 | * @param Globe|string $globe |
| 68 | * @param array<string,mixed> $extraFields |
| 69 | */ |
| 70 | public function __construct( $lat, $lon, $globe = Globe::EARTH, $extraFields = [] ) { |
| 71 | $this->lat = (float)$lat; |
| 72 | $this->lon = (float)$lon; |
| 73 | $this->globe = $globe instanceof Globe ? $globe->getName() : $globe; |
| 74 | |
| 75 | foreach ( $extraFields as $key => $value ) { |
| 76 | if ( isset( self::FIELD_MAPPING[$key] ) ) { |
| 77 | $this->$key = $value; |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Constructs a Coord object from a database row |
| 84 | * |
| 85 | * @param \stdClass $row |
| 86 | * @return self |
| 87 | */ |
| 88 | public static function newFromRow( $row ): self { |
| 89 | $c = new self( |
| 90 | (float)$row->gt_lat, |
| 91 | (float)$row->gt_lon, |
| 92 | $row->gt_globe |
| 93 | ); |
| 94 | |
| 95 | $c->id = $row->gt_id ?? 0; |
| 96 | $c->primary = (bool)( $row->gt_primary ?? false ); |
| 97 | $c->dim = ( $row->gt_dim ?? null ) === null ? null : (int)$row->gt_dim; |
| 98 | $c->type = $row->gt_type ?? null; |
| 99 | $c->name = $row->gt_name ?? null; |
| 100 | $c->country = $row->gt_country ?? null; |
| 101 | $c->region = $row->gt_region ?? null; |
| 102 | |
| 103 | return $c; |
| 104 | } |
| 105 | |
| 106 | public function getGlobeObj(): Globe { |
| 107 | return new Globe( $this->globe ); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * @param self|Globe|string $other |
| 112 | * @return bool |
| 113 | */ |
| 114 | public function sameGlobe( $other ): bool { |
| 115 | if ( $other instanceof self ) { |
| 116 | $other = $other->globe; |
| 117 | } |
| 118 | return $this->getGlobeObj()->equalsTo( $other ); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Compares this coordinates with the given coordinates |
| 123 | * |
| 124 | * @param self|null $other Coordinate to compare with |
| 125 | * @param int $precision Comparison precision |
| 126 | * @return bool |
| 127 | */ |
| 128 | public function equalsTo( $other, $precision = 6 ): bool { |
| 129 | return $other !== null |
| 130 | && round( $this->lat, $precision ) == round( $other->lat, $precision ) |
| 131 | && round( $this->lon, $precision ) == round( $other->lon, $precision ) |
| 132 | && $this->sameGlobe( $other ); |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Compares all the fields of this object with the given coordinates object |
| 137 | * |
| 138 | * @param self $coord Coordinate to compare with |
| 139 | * @param int $precision Comparison precision |
| 140 | * @return bool |
| 141 | */ |
| 142 | public function fullyEqualsTo( $coord, $precision = 6 ): bool { |
| 143 | return $this->equalsTo( $coord, $precision ) |
| 144 | && $this->primary == $coord->primary |
| 145 | && $this->dim === $coord->dim |
| 146 | && $this->type === $coord->type |
| 147 | && $this->name === $coord->name |
| 148 | && $this->country === $coord->country |
| 149 | && $this->region === $coord->region; |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Checks whether current coordinates are within current globe's allowed range |
| 154 | */ |
| 155 | public function isValid(): bool { |
| 156 | return $this->getGlobeObj()->coordinatesAreValid( $this->lat, $this->lon ); |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * Calculates the distance between this and another pair of coordinates. Assumes the two are on |
| 161 | * the same globe. No exception is thrown if this is not the case! |
| 162 | * |
| 163 | * @param Coord $coord |
| 164 | * @return float Distance in meters |
| 165 | */ |
| 166 | public function distanceTo( Coord $coord ): float { |
| 167 | return Math::distance( $this->lat, $this->lon, $coord->lat, $coord->lon, |
| 168 | $this->getGlobeObj()->getRadius() ); |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Returns this object's representation suitable for insertion into the DB via Databse::insert() |
| 173 | * |
| 174 | * @param int $pageId ID of page associated with this coordinate |
| 175 | * @param int|null $indexGranularity E.g. 10 for 1/10 of a degree |
| 176 | * @return array Associative array in format 'field' => 'value' |
| 177 | */ |
| 178 | public function getRow( $pageId, $indexGranularity ): array { |
| 179 | $row = [ 'gt_page_id' => $pageId ]; |
| 180 | foreach ( self::FIELD_MAPPING as $field => $column ) { |
| 181 | $row[$column] = $this->$field; |
| 182 | } |
| 183 | if ( $indexGranularity ) { |
| 184 | $row['gt_lat_int'] = (int)round( $this->lat * $indexGranularity ); |
| 185 | $row['gt_lon_int'] = (int)round( $this->lon * $indexGranularity ); |
| 186 | } |
| 187 | return $row; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Returns these coordinates as an associative array |
| 192 | */ |
| 193 | public function getAsArray(): array { |
| 194 | $result = []; |
| 195 | foreach ( self::FIELD_MAPPING as $field => $_ ) { |
| 196 | $result[$field] = $this->$field; |
| 197 | } |
| 198 | return $result; |
| 199 | } |
| 200 | |
| 201 | public function jsonSerialize(): array { |
| 202 | return $this->getAsArray(); |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Instantiate a Coord from $json array created with self::jsonSerialize. |
| 207 | * |
| 208 | * @internal |
| 209 | * @see jsonSerialize |
| 210 | */ |
| 211 | public static function newFromJson( array $json ): self { |
| 212 | return new self( |
| 213 | $json['lat'], |
| 214 | $json['lon'], |
| 215 | $json['globe'], |
| 216 | $json |
| 217 | ); |
| 218 | } |
| 219 | } |