/**
* Test for the geohash::contains() and geohash_set::contains() functions.
* This test constructs the test points and ranges in and around the geohash.
*
* @dataProvider geohashProvider
* @param string $geohash
*/
public function testContains($geohash)
{
$north = geohash::neighbor($geohash, geohash::north);
$south = geohash::neighbor($geohash, geohash::south);
$east = geohash::neighbor($geohash, geohash::east);
$west = geohash::neighbor($geohash, geohash::west);
$outside_tests = array($east, $west);
if ($north) {
$outside_tests[] = $north;
}
if ($south) {
$outside_tests[] = $south;
}
// test points outside the geohash box
foreach ($outside_tests as $test) {
for ($i = 0; $i < 32; $i++) {
$point = geohash::decode($test . geohash::encode_digit($i));
$this->assertFalse(geohash::contains($geohash, $point));
}
}
// test points inside the box
for ($i = 0; $i < 32; $i++) {
$point = geohash::decode($geohash . geohash::encode_digit($i));
$this->assertTrue(geohash::contains($geohash, $point));
}
// and the four edge cases (all corners)
$box = geohash::decode_box($geohash);
$this->assertTrue(geohash::contains($geohash, new geopoint($box->north, $box->west)));
$this->assertTrue(geohash::contains($geohash, new geopoint($box->north, $box->east)));
$this->assertTrue(geohash::contains($geohash, new geopoint($box->south, $box->west)));
$this->assertTrue(geohash::contains($geohash, new geopoint($box->south, $box->east)));
// make a geohash set and test points inside and out
$set = new geohash_set();
$set->add_range($geohash . geohash::encode_digit(8), $geohash . geohash::encode_digit(23));
// test points outside the set
foreach ($outside_tests as $test) {
$point = geohash::decode($test);
$this->assertFalse($set->contains($point));
}
// test closer points outside the set
for ($i = 0; $i < 8; $i++) {
$point = geohash::decode($geohash . geohash::encode_digit($i));
$this->assertFalse($set->contains($point));
}
for ($i = 24; $i < 32; $i++) {
$point = geohash::decode($geohash . geohash::encode_digit($i));
$this->assertFalse($set->contains($point));
}
// test points inside the set
for ($i = 8; $i < 24; $i++) {
$point = geohash::decode($geohash . geohash::encode_digit($i));
$this->assertTrue($set->contains($point));
}
// make a compound geohash set and test points inside and out
$set = new geohash_set();
$set->add($geohash);
$set->add($east);
// test points outside the set
$outside_tests = array(geohash::neighbor($east, geohash::east), $west);
if ($north) {
$outside_tests[] = $north;
}
if ($south) {
$outside_tests[] = $south;
}
foreach ($outside_tests as $test) {
$point = geohash::decode($test);
$this->assertFalse($set->contains($point));
}
// test points inside the set
$point = geohash::decode($geohash);
$this->assertTrue($set->contains($point));
$point = geohash::decode($east);
$this->assertTrue($set->contains($point));
}
/**
* Returns true if the point falls within one of the hash boxes.
*
* @param float $latitude
* @param float $longitude
* @return boolean
*/
public function contains($point)
{
foreach ($this->geohashes as $geohash) {
if (is_array($geohash)) {
$first = $geohash[0];
$last = $geohash[1];
$test = $first;
while ($test <= $last && $test) {
if (geohash::contains($test, $point)) {
return true;
}
$test = geohash::increment($test);
}
} else {
if (geohash::contains($geohash, $point)) {
return true;
}
}
}
return false;
}
