File Coverage

blib/lib/JSONSchema/Validator.pm

Criterion	Covered	Total	%
statement	92	92	100.0
branch	17	24	70.8
condition	18	25	72.0
subroutine	18	18	100.0
pod	4	8	50.0
total	149	167	89.2

package JSONSchema::Validator;

# ABSTRACT: Validator for JSON Schema Draft4/Draft6/Draft7 and OpenAPI Specification 3.0

use strict;
use warnings;
use URI::file;
use Carp 'croak';
use Cwd;

use JSONSchema::Validator::Draft4;
use JSONSchema::Validator::Draft6;
use JSONSchema::Validator::Draft7;
use JSONSchema::Validator::OAS30;
use JSONSchema::Validator::Util qw(get_resource decode_content read_file);

our $VERSION = '0.010';

my $SPECIFICATIONS = {
    JSONSchema::Validator::OAS30::ID => JSONSchema::Validator::OAS30::SPECIFICATION,
    JSONSchema::Validator::Draft4::ID => JSONSchema::Validator::Draft4::SPECIFICATION,
    JSONSchema::Validator::Draft6::ID => JSONSchema::Validator::Draft6::SPECIFICATION,
    JSONSchema::Validator::Draft7::ID => JSONSchema::Validator::Draft7::SPECIFICATION
};

our $JSON_SCHEMA_VALIDATORS = ['JSONSchema::Validator::Draft4', 'JSONSchema::Validator::Draft6', 'JSONSchema::Validator::Draft7'];
our $OAS_VALIDATORS = ['JSONSchema::Validator::OAS30'];


sub new {
    my ($class, %params) = @_;

    my $resource = delete $params{resource};
    my $validate_schema = delete($params{validate_schema}) // 1;
    my $schema = delete $params{schema};
    my $base_uri = delete $params{base_uri};
    my $specification = delete $params{specification};

    $schema = resource_schema($resource, \%params) if !$schema && $resource;
    croak 'resource or schema must be specified' unless defined $schema;

    my $validator_class = find_validator($specification // schema_specification($schema));
    croak 'unknown specification' unless $validator_class;

    if ($validate_schema) {
        my ($result, $errors) = $class->validate_resource_schema($schema, $validator_class->SPECIFICATION);
        croak "invalid schema:\n" . join "\n", @$errors unless $result;
    }

    # schema may be boolean value according to json schema draft6
    if (ref $schema eq 'HASH') {
        $base_uri //= $resource || $schema->{'$id'} || $schema->{id};
    }

    return $validator_class->new(schema => $schema, base_uri => $base_uri, %params);
}


sub validate_paths {
    my ($class, $globs) = @_;
    my $results = {};
    for my $glob (@$globs) {
        my @resources = map { Cwd::abs_path($_) } glob $glob;
        for my $resource (@resources) {
            my $uri = URI::file->new($resource)->as_string;
            my ($result, $errors) = $class->validate_resource($uri);
            $results->{$resource} = [$result, $errors];
        }
    }
    return $results;
}


sub validate_resource {
    my ($class, $resource, %params) = @_;
    my $schema_to_validate = resource_schema($resource, \%params);

    my $validator_class = find_validator(schema_specification($schema_to_validate));
    croak "unknown specification of resource $resource" unless $validator_class;

    return $class->validate_resource_schema($schema_to_validate, $validator_class->SPECIFICATION);
}


sub validate_resource_schema {
    my ($class, $schema_to_validate, $schema_specification) = @_;

    my $schema = read_specification($schema_specification);
    my $meta_schema = $schema->{'$schema'};

    my $meta_schema_specification = $SPECIFICATIONS->{$meta_schema} // $SPECIFICATIONS->{$meta_schema . '#'};
    croak "unknown meta schema: $meta_schema" unless $meta_schema_specification;

    my $validator_class = find_validator($meta_schema_specification);
    croak "can't find validator by meta schema: $meta_schema" unless $validator_class;

    my $validator = $validator_class->new(schema => $schema);
    my ($result, $errors) = $validator->validate_schema($schema_to_validate);
    return ($result, $errors);
}

sub read_specification {
    my $filename = shift;
    my $curret_filepath = __FILE__;
    my $schema_filepath = ($curret_filepath =~ s/\.pm$//r) . '/schemas/' . lc($filename) . '.json';
    my ($content, $mime_type) = read_file($schema_filepath);
    return decode_content($content, $mime_type, $schema_filepath);
}

sub resource_schema {
    my ($resource, $params) = @_;
    my ($response, $mime_type) = get_resource($params->{scheme_handlers}, $resource);
    my $schema = decode_content($response, $mime_type, $resource);
    return $schema;
}

sub find_validator {
    my $specification = shift;
    my ($validator_class) = grep { lc($_->SPECIFICATION) eq lc($specification // '') } @$JSON_SCHEMA_VALIDATORS, @$OAS_VALIDATORS;
    return $validator_class;
}

sub schema_specification {
    my $schema = shift;
    return if ref $schema ne 'HASH';

    my $meta_schema = $schema->{'$schema'};
    my $specification = $meta_schema ? $SPECIFICATIONS->{$meta_schema} // $SPECIFICATIONS->{$meta_schema . '#'} : undef;

    if (!$specification && $schema->{openapi}) {
        my @vers = split /\./, $schema->{openapi};
        $specification = 'OAS' . $vers[0] . $vers[1];
    }

    return $specification;
}

1;

__END__