friendica/php-json-ld
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Remove duplicate RDF statements.

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Dave Longley 2012-06-30 21:08:28 -04:00
parent 0a1058d4c0
commit 084c9e4db1
1 changed files with 77 additions and 7 deletions
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84
jsonld.php
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@ -973,8 +973,8 @@ class JsonLdProcessor {
'nominalValue' => $match[10], 'interfaceName' => 'BlankNode'); 'nominalValue' => $match[10], 'interfaceName' => 'BlankNode');
} }
// add statement // add statement
$statements[] = $s; JsonLdProcessor::_appendUniqueRdfStatement($statements, $s);
} }
return $statements; return $statements;
@ -1157,8 +1157,10 @@ class JsonLdProcessor {
if(self::_isValue($element)) { if(self::_isValue($element)) {
// if @value is the only key // if @value is the only key
if(count(get_object_vars($element)) === 1) { if(count(get_object_vars($element)) === 1) {
// if there is no default language, return value of @value // if there is no default language or @value is not a string,
if(!property_exists($ctx, '@language')) { // return value of @value
if(!property_exists($ctx, '@language') ||
!is_string($element->{'@value'})) {
return $element->{'@value'}; return $element->{'@value'};
} }
// return full element, alias @value // return full element, alias @value
@ -1885,7 +1887,7 @@ class JsonLdProcessor {
if($graph !== null) { if($graph !== null) {
$statement->name = $graph; $statement->name = $graph;
} }
$statements[] = $statement; JsonLdProcessor::_appendUniqueRdfStatement($statements, $statement);
return; return;
} }
@ -1919,7 +1921,7 @@ class JsonLdProcessor {
if($graph !== null) { if($graph !== null) {
$statement->name = $graph; $statement->name = $graph;
} }
$statements[] = $statement; JsonLdProcessor::_appendUniqueRdfStatement($statements, $statement);
} }
// set new active subject to object // set new active subject to object
@ -1981,7 +1983,7 @@ class JsonLdProcessor {
if($graph !== null) { if($graph !== null) {
$statement->name = $graph; $statement->name = $graph;
} }
$statements[] = $statement; JsonLdProcessor::_appendUniqueRdfStatement($statements, $statement);
return; return;
} }
} }
@ -3656,6 +3658,74 @@ class JsonLdProcessor {
)); ));
} }
/**
* Compares two RDF statements for equality.
*
* @param stdClass $s1 the first statement.
* @param stdClass $s2 the second statement.
*
* @return true if the statements are the same, false if not.
*/
protected static function _compareRdfStatements($s1, $s2) {
if(is_string($s1) || is_string($s2)) {
return $s1 === $s2;
}
$attrs = array('subject', 'property', 'object');
foreach($attrs as $attr) {
if($s1->{$attr}->interfaceName !== $s2->{$attr}->interfaceName ||
$s1->{$attr}->nominalValue !== $s2->{$attr}->nominalValue) {
return false;
}
}
if(property_exists($s1->object, 'language') !==
property_exists($s1->object, 'language')) {
return false;
}
if(property_exists($s1->object, 'language')) {
if($s1->object->language !== $s2->object->language) {
return false;
}
}
if(property_exists($s1->object, 'datatype') !==
property_exists($s1->object, 'datatype')) {
return false;
}
if(property_exists($s1->object, 'datatype')) {
if($s1->object->datatype->interfaceName !==
$s2->object->datatype->interfaceName ||
$s1->object->datatype->nominalValue !==
$s2->object->datatype->nominalValue) {
return false;
}
}
if(property_exists($s1, 'name') !== property_exists($s1, 'name')) {
return false;
}
if(property_exists($s1, 'name')) {
if($s1->name !== $s2->name) {
return false;
}
}
return true;
}
/**
* Appends an RDF statement to the given array of statements if it is unique.
*
* @param array $statements the array to add to.
* @param stdClass $statement the statement to add.
*/
protected static function _appendUniqueRdfStatement(
&$statements, $statement) {
foreach($statements as $s) {
if(JsonLdProcessor::_compareRdfStatements($s, $statement)) {
return;
}
}
$statements[] = $statement;
}
/** /**
* Returns whether or not the given value is a keyword (or a keyword alias). * Returns whether or not the given value is a keyword (or a keyword alias).
* *