mirror of
https://github.com/danog/psalm.git
synced 2024-12-15 10:57:08 +01:00
774 lines
29 KiB
PHP
774 lines
29 KiB
PHP
<?php
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namespace Psalm\Internal\Analyzer\Statements\Expression\Fetch;
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use PhpParser;
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use Psalm\Internal\Analyzer\ClassLikeAnalyzer;
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use Psalm\Internal\Analyzer\FunctionLikeAnalyzer;
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use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
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use Psalm\Internal\Analyzer\StatementsAnalyzer;
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use Psalm\CodeLocation;
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use Psalm\Context;
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use Psalm\Issue\DeprecatedProperty;
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use Psalm\Issue\InvalidPropertyFetch;
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use Psalm\Issue\InternalProperty;
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use Psalm\Issue\MissingPropertyType;
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use Psalm\Issue\MixedPropertyFetch;
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use Psalm\Issue\NoInterfaceProperties;
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use Psalm\Issue\NullPropertyFetch;
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use Psalm\Issue\ParentNotFound;
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use Psalm\Issue\PossiblyInvalidPropertyFetch;
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use Psalm\Issue\PossiblyNullPropertyFetch;
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use Psalm\Issue\UndefinedClass;
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use Psalm\Issue\UndefinedPropertyFetch;
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use Psalm\Issue\UndefinedThisPropertyFetch;
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use Psalm\IssueBuffer;
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use Psalm\Type;
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use Psalm\Type\Atomic\TGenericObject;
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use Psalm\Type\Atomic\TNamedObject;
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use Psalm\Type\Atomic\TNull;
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use Psalm\Type\Atomic\TObject;
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/**
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* @internal
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*/
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class PropertyFetchAnalyzer
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{
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/**
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* @param StatementsAnalyzer $statements_analyzer
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* @param PhpParser\Node\Expr\PropertyFetch $stmt
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* @param Context $context
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*
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* @return false|null
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*/
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public static function analyzeInstance(
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StatementsAnalyzer $statements_analyzer,
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PhpParser\Node\Expr\PropertyFetch $stmt,
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Context $context
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) {
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if (!$stmt->name instanceof PhpParser\Node\Identifier) {
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if (ExpressionAnalyzer::analyze($statements_analyzer, $stmt->name, $context) === false) {
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return false;
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}
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}
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if (ExpressionAnalyzer::analyze($statements_analyzer, $stmt->var, $context) === false) {
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return false;
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}
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if ($stmt->name instanceof PhpParser\Node\Identifier) {
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$prop_name = $stmt->name->name;
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} elseif (isset($stmt->name->inferredType)
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&& $stmt->name->inferredType->isSingleStringLiteral()
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) {
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$prop_name = $stmt->name->inferredType->getSingleStringLiteral()->value;
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} else {
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$prop_name = null;
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}
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$codebase = $statements_analyzer->getCodebase();
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$stmt_var_id = ExpressionAnalyzer::getArrayVarId(
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$stmt->var,
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$statements_analyzer->getFQCLN(),
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$statements_analyzer
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);
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$var_id = ExpressionAnalyzer::getArrayVarId(
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$stmt,
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$statements_analyzer->getFQCLN(),
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$statements_analyzer
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);
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$stmt_var_type = null;
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$stmt->inferredType = null;
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if ($var_id && $context->hasVariable($var_id, $statements_analyzer)) {
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// we don't need to check anything
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$stmt->inferredType = $context->vars_in_scope[$var_id];
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$codebase->analyzer->incrementNonMixedCount($statements_analyzer->getFilePath());
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if ($codebase->server_mode
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&& (!$context->collect_initializations
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&& !$context->collect_mutations)
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) {
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$codebase->analyzer->addNodeType(
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$statements_analyzer->getFilePath(),
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$stmt->name,
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(string) $stmt->inferredType
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);
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}
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if (isset($stmt->var->inferredType)
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&& $stmt->var->inferredType->hasObjectType()
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&& $stmt->name instanceof PhpParser\Node\Identifier
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) {
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// log the appearance
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foreach ($stmt->var->inferredType->getTypes() as $lhs_type_part) {
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if ($lhs_type_part instanceof TNamedObject) {
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if (!$codebase->classExists($lhs_type_part->value)) {
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continue;
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}
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$property_id = $lhs_type_part->value . '::$' . $stmt->name->name;
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$codebase->properties->propertyExists(
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$property_id,
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$context->calling_method_id,
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$context->collect_references
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? new CodeLocation($statements_analyzer->getSource(), $stmt)
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: null
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);
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if ($codebase->server_mode) {
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$codebase->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
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$stmt->name,
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$property_id
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);
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}
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}
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}
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}
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return null;
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}
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if ($stmt_var_id && $context->hasVariable($stmt_var_id, $statements_analyzer)) {
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$stmt_var_type = $context->vars_in_scope[$stmt_var_id];
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} elseif (isset($stmt->var->inferredType)) {
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$stmt_var_type = $stmt->var->inferredType;
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}
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if (!$stmt_var_type) {
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return null;
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}
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if ($stmt_var_type->isNull()) {
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if (IssueBuffer::accepts(
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new NullPropertyFetch(
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'Cannot get property on null variable ' . $stmt_var_id,
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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return false;
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}
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return null;
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}
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if ($stmt_var_type->isEmpty()) {
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if (IssueBuffer::accepts(
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new MixedPropertyFetch(
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'Cannot fetch property on empty var ' . $stmt_var_id,
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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return false;
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}
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return null;
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}
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if ($stmt_var_type->hasMixed()) {
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$codebase->analyzer->incrementMixedCount($statements_analyzer->getFilePath());
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if (IssueBuffer::accepts(
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new MixedPropertyFetch(
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'Cannot fetch property on mixed var ' . $stmt_var_id,
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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if ($stmt_var_type->hasMixed()) {
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$stmt->inferredType = Type::getMixed();
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if ($codebase->server_mode
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&& (!$context->collect_initializations
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&& !$context->collect_mutations)
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) {
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$codebase->analyzer->addNodeType(
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$statements_analyzer->getFilePath(),
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$stmt->name,
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(string) $stmt->inferredType
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);
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}
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return null;
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}
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}
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$codebase->analyzer->incrementNonMixedCount($statements_analyzer->getRootFilePath());
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if ($stmt_var_type->isNullable() && !$stmt_var_type->ignore_nullable_issues && !$context->inside_isset) {
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if (IssueBuffer::accepts(
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new PossiblyNullPropertyFetch(
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'Cannot get property on possibly null variable ' . $stmt_var_id . ' of type ' . $stmt_var_type,
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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$stmt->inferredType = Type::getNull();
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}
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if (!$prop_name) {
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return null;
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}
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$invalid_fetch_types = [];
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$has_valid_fetch_type = false;
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foreach ($stmt_var_type->getTypes() as $lhs_type_part) {
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if ($lhs_type_part instanceof TNull) {
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continue;
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}
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if ($lhs_type_part instanceof Type\Atomic\TMixed) {
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$stmt->inferredType = Type::getMixed();
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continue;
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}
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if ($lhs_type_part instanceof Type\Atomic\TFalse && $stmt_var_type->ignore_falsable_issues) {
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continue;
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}
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if (!$lhs_type_part instanceof TNamedObject && !$lhs_type_part instanceof TObject) {
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$invalid_fetch_types[] = (string)$lhs_type_part;
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continue;
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}
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$has_valid_fetch_type = true;
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// stdClass and SimpleXMLElement are special cases where we cannot infer the return types
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// but we don't want to throw an error
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// Hack has a similar issue: https://github.com/facebook/hhvm/issues/5164
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if ($lhs_type_part instanceof TObject
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|| in_array(strtolower($lhs_type_part->value), ['stdclass', 'simplexmlelement'], true)
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) {
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$stmt->inferredType = Type::getMixed();
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continue;
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}
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if (ExpressionAnalyzer::isMock($lhs_type_part->value)) {
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$stmt->inferredType = Type::getMixed();
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continue;
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}
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$intersection_types = $lhs_type_part->getIntersectionTypes() ?: [];
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$fq_class_name = $lhs_type_part->value;
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$override_property_visibility = false;
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if (!$codebase->classExists($lhs_type_part->value)) {
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$class_exists = false;
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if ($codebase->interfaceExists($lhs_type_part->value)) {
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$interface_storage = $codebase->classlike_storage_provider->get($lhs_type_part->value);
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$override_property_visibility = $interface_storage->override_property_visibility;
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foreach ($intersection_types as $intersection_type) {
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if ($intersection_type instanceof TNamedObject
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&& $codebase->classExists($intersection_type->value)
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) {
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$fq_class_name = $intersection_type->value;
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$class_exists = true;
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break;
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}
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}
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if (!$class_exists) {
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if (IssueBuffer::accepts(
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new NoInterfaceProperties(
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'Interfaces cannot have properties',
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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return null;
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}
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}
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if (!$class_exists) {
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if (IssueBuffer::accepts(
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new UndefinedClass(
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'Cannot set properties of undefined class ' . $lhs_type_part->value,
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$lhs_type_part->value
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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return null;
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}
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}
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$property_id = $fq_class_name . '::$' . $prop_name;
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if ($codebase->server_mode) {
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$codebase->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
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$stmt->name,
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$property_id
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);
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}
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if ($codebase->methodExists($fq_class_name . '::__get')
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&& (!$codebase->properties->propertyExists($property_id)
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|| ($stmt_var_id !== '$this'
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&& $fq_class_name !== $context->self
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&& ClassLikeAnalyzer::checkPropertyVisibility(
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$property_id,
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$context->self,
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$statements_analyzer,
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$statements_analyzer->getSuppressedIssues(),
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false
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) !== true)
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)
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) {
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$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
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if (isset($class_storage->pseudo_property_get_types['$' . $prop_name])) {
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$stmt->inferredType = clone $class_storage->pseudo_property_get_types['$' . $prop_name];
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continue;
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}
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$stmt->inferredType = Type::getMixed();
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/*
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* If we have an explicit list of all allowed magic properties on the class, and we're
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* not in that list, fall through
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*/
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if (!$class_storage->sealed_properties && !$override_property_visibility) {
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continue;
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}
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}
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if (!$codebase->properties->propertyExists(
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$property_id,
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$context->calling_method_id,
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$context->collect_references ? new CodeLocation($statements_analyzer->getSource(), $stmt) : null
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)
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) {
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if ($context->inside_isset) {
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return;
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}
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if ($stmt_var_id === '$this') {
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if ($context->collect_mutations) {
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return;
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}
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if (IssueBuffer::accepts(
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new UndefinedThisPropertyFetch(
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'Instance property ' . $property_id . ' is not defined',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$property_id
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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} else {
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if (IssueBuffer::accepts(
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new UndefinedPropertyFetch(
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'Instance property ' . $property_id . ' is not defined',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$property_id
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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$stmt->inferredType = Type::getMixed();
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if ($var_id) {
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$context->vars_in_scope[$var_id] = $stmt->inferredType;
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}
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return;
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}
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if (!$override_property_visibility) {
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if (ClassLikeAnalyzer::checkPropertyVisibility(
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$property_id,
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$context->self,
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$statements_analyzer,
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$statements_analyzer->getSuppressedIssues()
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) === false) {
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return false;
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}
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}
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$declaring_property_class = (string) $codebase->properties->getDeclaringClassForProperty($property_id);
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$declaring_class_storage = $codebase->classlike_storage_provider->get(
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$declaring_property_class
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);
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$property_storage = $declaring_class_storage->properties[$prop_name];
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if ($property_storage->deprecated) {
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if (IssueBuffer::accepts(
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new DeprecatedProperty(
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$property_id . ' is marked deprecated',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$property_id
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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if ($property_storage->internal && $context->self) {
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$self_root = preg_replace('/^([^\\\]+).*/', '$1', $context->self);
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$declaring_root = preg_replace('/^([^\\\]+).*/', '$1', $declaring_property_class);
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if (strtolower($self_root) !== strtolower($declaring_root)) {
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if (IssueBuffer::accepts(
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new InternalProperty(
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$property_id . ' is marked internal',
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new CodeLocation($statements_analyzer->getSource(), $stmt),
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$property_id
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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}
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}
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$class_property_type = $property_storage->type;
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if ($class_property_type === false) {
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if (IssueBuffer::accepts(
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new MissingPropertyType(
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'Property ' . $fq_class_name . '::$' . $prop_name
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. ' does not have a declared type',
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new CodeLocation($statements_analyzer->getSource(), $stmt)
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),
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$statements_analyzer->getSuppressedIssues()
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)) {
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// fall through
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}
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$class_property_type = Type::getMixed();
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} else {
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$class_property_type = ExpressionAnalyzer::fleshOutType(
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$codebase,
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clone $class_property_type,
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$declaring_property_class,
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$declaring_property_class
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);
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if ($lhs_type_part instanceof TGenericObject) {
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$class_storage = $codebase->classlike_storage_provider->get($fq_class_name);
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if ($class_storage->template_types) {
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$class_template_params = [];
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$reversed_class_template_types = array_reverse(array_keys($class_storage->template_types));
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$provided_type_param_count = count($lhs_type_part->type_params);
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foreach ($reversed_class_template_types as $i => $type_name) {
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if (isset($lhs_type_part->type_params[$provided_type_param_count - 1 - $i])) {
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$class_template_params[$type_name] =
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(string)$lhs_type_part->type_params[$provided_type_param_count - 1 - $i];
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} else {
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$class_template_params[$type_name] = 'mixed';
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}
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}
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$type_tokens = Type::tokenize((string)$class_property_type);
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foreach ($type_tokens as &$type_token) {
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if (isset($class_template_params[$type_token])) {
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$type_token = $class_template_params[$type_token];
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}
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}
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$class_property_type = Type::parseString(implode('', $type_tokens));
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}
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}
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}
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if (isset($stmt->inferredType)) {
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$stmt->inferredType = Type::combineUnionTypes($class_property_type, $stmt->inferredType);
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} else {
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$stmt->inferredType = $class_property_type;
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}
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}
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if ($codebase->server_mode
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&& (!$context->collect_initializations
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&& !$context->collect_mutations)
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&& isset($stmt->inferredType)
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) {
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$codebase->analyzer->addNodeType(
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$statements_analyzer->getFilePath(),
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$stmt->name,
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(string) $stmt->inferredType
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);
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}
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if ($invalid_fetch_types) {
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$lhs_type_part = $invalid_fetch_types[0];
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|
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if ($has_valid_fetch_type) {
|
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if (IssueBuffer::accepts(
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new PossiblyInvalidPropertyFetch(
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|
'Cannot fetch property on possible non-object ' . $stmt_var_id . ' of type ' . $lhs_type_part,
|
|
new CodeLocation($statements_analyzer->getSource(), $stmt)
|
|
),
|
|
$statements_analyzer->getSuppressedIssues()
|
|
)) {
|
|
// fall through
|
|
}
|
|
} else {
|
|
if (IssueBuffer::accepts(
|
|
new InvalidPropertyFetch(
|
|
'Cannot fetch property on non-object ' . $stmt_var_id . ' of type ' . $lhs_type_part,
|
|
new CodeLocation($statements_analyzer->getSource(), $stmt)
|
|
),
|
|
$statements_analyzer->getSuppressedIssues()
|
|
)) {
|
|
// fall through
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($var_id) {
|
|
$context->vars_in_scope[$var_id] = isset($stmt->inferredType) ? $stmt->inferredType : Type::getMixed();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param StatementsAnalyzer $statements_analyzer
|
|
* @param PhpParser\Node\Expr\StaticPropertyFetch $stmt
|
|
* @param Context $context
|
|
*
|
|
* @return null|false
|
|
*/
|
|
public static function analyzeStatic(
|
|
StatementsAnalyzer $statements_analyzer,
|
|
PhpParser\Node\Expr\StaticPropertyFetch $stmt,
|
|
Context $context
|
|
) {
|
|
if ($stmt->class instanceof PhpParser\Node\Expr\Variable ||
|
|
$stmt->class instanceof PhpParser\Node\Expr\ArrayDimFetch
|
|
) {
|
|
// @todo check this
|
|
return null;
|
|
}
|
|
|
|
$fq_class_name = null;
|
|
|
|
$codebase = $statements_analyzer->getCodebase();
|
|
|
|
if ($stmt->class instanceof PhpParser\Node\Name) {
|
|
if (count($stmt->class->parts) === 1
|
|
&& in_array(strtolower($stmt->class->parts[0]), ['self', 'static', 'parent'], true)
|
|
) {
|
|
if ($stmt->class->parts[0] === 'parent') {
|
|
$fq_class_name = $statements_analyzer->getParentFQCLN();
|
|
|
|
if ($fq_class_name === null) {
|
|
if (IssueBuffer::accepts(
|
|
new ParentNotFound(
|
|
'Cannot check property fetch on parent as this class does not extend another',
|
|
new CodeLocation($statements_analyzer->getSource(), $stmt)
|
|
),
|
|
$statements_analyzer->getSuppressedIssues()
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return;
|
|
}
|
|
} else {
|
|
$fq_class_name = (string)$context->self;
|
|
}
|
|
|
|
if ($context->isPhantomClass($fq_class_name)) {
|
|
return null;
|
|
}
|
|
} else {
|
|
$aliases = $statements_analyzer->getAliases();
|
|
|
|
if ($context->calling_method_id
|
|
&& !$stmt->class instanceof PhpParser\Node\Name\FullyQualified
|
|
) {
|
|
$codebase->file_reference_provider->addReferenceToClassMethod(
|
|
$context->calling_method_id,
|
|
'use:' . $stmt->class->parts[0] . ':' . \md5($statements_analyzer->getFilePath())
|
|
);
|
|
}
|
|
|
|
$fq_class_name = ClassLikeAnalyzer::getFQCLNFromNameObject(
|
|
$stmt->class,
|
|
$aliases
|
|
);
|
|
|
|
if ($context->isPhantomClass($fq_class_name)) {
|
|
return null;
|
|
}
|
|
|
|
if ($context->check_classes) {
|
|
if (ClassLikeAnalyzer::checkFullyQualifiedClassLikeName(
|
|
$statements_analyzer,
|
|
$fq_class_name,
|
|
new CodeLocation($statements_analyzer->getSource(), $stmt->class),
|
|
$statements_analyzer->getSuppressedIssues(),
|
|
false
|
|
) !== true) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
$stmt->class->inferredType = $fq_class_name ? new Type\Union([new TNamedObject($fq_class_name)]) : null;
|
|
}
|
|
|
|
if ($stmt->name instanceof PhpParser\Node\VarLikeIdentifier) {
|
|
$prop_name = $stmt->name->name;
|
|
} elseif (isset($stmt->name->inferredType)
|
|
&& $stmt->name->inferredType->isSingleStringLiteral()
|
|
) {
|
|
$prop_name = $stmt->name->inferredType->getSingleStringLiteral()->value;
|
|
} else {
|
|
$prop_name = null;
|
|
}
|
|
|
|
if ($fq_class_name &&
|
|
$context->check_classes &&
|
|
$context->check_variables &&
|
|
$prop_name &&
|
|
!ExpressionAnalyzer::isMock($fq_class_name)
|
|
) {
|
|
$var_id = ExpressionAnalyzer::getVarId(
|
|
$stmt,
|
|
$statements_analyzer->getFQCLN(),
|
|
$statements_analyzer
|
|
);
|
|
|
|
$property_id = $fq_class_name . '::$' . $prop_name;
|
|
|
|
if ($codebase->server_mode) {
|
|
$codebase->analyzer->addNodeReference(
|
|
$statements_analyzer->getFilePath(),
|
|
$stmt->name,
|
|
$property_id
|
|
);
|
|
}
|
|
|
|
if ($var_id && $context->hasVariable($var_id, $statements_analyzer)) {
|
|
// we don't need to check anything
|
|
$stmt->inferredType = $context->vars_in_scope[$var_id];
|
|
|
|
if ($context->collect_references) {
|
|
// log the appearance
|
|
$codebase->properties->propertyExists(
|
|
$property_id,
|
|
$context->calling_method_id,
|
|
new CodeLocation($statements_analyzer->getSource(), $stmt)
|
|
);
|
|
}
|
|
|
|
if ($codebase->server_mode
|
|
&& (!$context->collect_initializations
|
|
&& !$context->collect_mutations)
|
|
&& isset($stmt->inferredType)
|
|
) {
|
|
$codebase->analyzer->addNodeType(
|
|
$statements_analyzer->getFilePath(),
|
|
$stmt->name,
|
|
(string) $stmt->inferredType
|
|
);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
if (!$codebase->properties->propertyExists(
|
|
$property_id,
|
|
$context->calling_method_id,
|
|
$context->collect_references ? new CodeLocation($statements_analyzer->getSource(), $stmt) : null
|
|
)
|
|
) {
|
|
if (IssueBuffer::accepts(
|
|
new UndefinedPropertyFetch(
|
|
'Static property ' . $property_id . ' is not defined',
|
|
new CodeLocation($statements_analyzer->getSource(), $stmt),
|
|
$property_id
|
|
),
|
|
$statements_analyzer->getSuppressedIssues()
|
|
)) {
|
|
return false;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if (ClassLikeAnalyzer::checkPropertyVisibility(
|
|
$property_id,
|
|
$context->self,
|
|
$statements_analyzer,
|
|
new CodeLocation($statements_analyzer->getSource(), $stmt),
|
|
$statements_analyzer->getSuppressedIssues()
|
|
) === false) {
|
|
return false;
|
|
}
|
|
|
|
$declaring_property_class = $codebase->properties->getDeclaringClassForProperty(
|
|
$fq_class_name . '::$' . $prop_name
|
|
);
|
|
|
|
$class_storage = $codebase->classlike_storage_provider->get((string)$declaring_property_class);
|
|
$property = $class_storage->properties[$prop_name];
|
|
|
|
if ($var_id) {
|
|
$context->vars_in_scope[$var_id] = $property->type
|
|
? clone $property->type
|
|
: Type::getMixed();
|
|
|
|
$stmt->inferredType = clone $context->vars_in_scope[$var_id];
|
|
|
|
if ($codebase->server_mode
|
|
&& (!$context->collect_initializations
|
|
&& !$context->collect_mutations)
|
|
) {
|
|
$codebase->analyzer->addNodeType(
|
|
$statements_analyzer->getFilePath(),
|
|
$stmt->name,
|
|
(string) $stmt->inferredType
|
|
);
|
|
}
|
|
} else {
|
|
$stmt->inferredType = Type::getMixed();
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|