82 lines
2.9 KiB
Go
82 lines
2.9 KiB
Go
package validjsonschema
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import (
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"bytes"
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"context"
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"fmt"
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"github.com/santhosh-tekuri/jsonschema/v6"
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"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
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"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
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)
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const Key = "generic/valid_json_schema"
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const ReasonCodeInvalidJSON = "invalid_json"
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const ReasonCodeSchemaInvalid = "json_schema_invalid"
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type Options struct{}
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type Validator struct{}
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var _ contracts.SerializedValidator = (*Validator)(nil)
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func New(Options) *Validator { return &Validator{} }
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func (v *Validator) Name() string { return Key }
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func (v *Validator) ExecutionClass() contracts.ExecutionClass {
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return contracts.ExecutionClassDeterministic
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}
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func (v *Validator) Validate(_ context.Context, req contracts.SerializedValidationRequest) (contracts.ValidationResult, error) {
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return validate(req.Content, req.Schema.JSONSchema)
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}
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func validate(content, schemaContent []byte) (contracts.ValidationResult, error) {
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if len(schemaContent) == 0 {
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return contracts.ValidationResult{}, fmt.Errorf("response schema content is not available")
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}
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instance, err := jsonschema.UnmarshalJSON(bytes.NewReader(content))
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if err != nil {
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return contracts.ValidationResult{Approved: false, ReasonCode: ReasonCodeInvalidJSON, Message: "payload is not valid JSON"}, nil
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}
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schemaDocument, err := jsonschema.UnmarshalJSON(bytes.NewReader(schemaContent))
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if err != nil {
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return contracts.ValidationResult{}, fmt.Errorf("parse response schema: %w", err)
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}
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compiler := jsonschema.NewCompiler()
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if err := compiler.AddResource("schema.json", schemaDocument); err != nil {
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return contracts.ValidationResult{}, fmt.Errorf("load response schema: %w", err)
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}
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schema, err := compiler.Compile("schema.json")
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if err != nil {
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return contracts.ValidationResult{}, fmt.Errorf("compile response schema: %w", err)
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}
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if err := schema.Validate(instance); err != nil {
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return contracts.ValidationResult{Approved: false, ReasonCode: ReasonCodeSchemaInvalid, Message: "payload does not conform to response schema"}, nil
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}
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return contracts.ValidationResult{Approved: true}, nil
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}
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func Spec() pipeline.ValidatorSpec {
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return pipeline.ValidatorSpec{Key: Key, ExecutionClass: contracts.ExecutionClassDeterministic}
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}
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func Register(registry *pipeline.ValidatorRegistry) error {
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return pipeline.RegisterSerializedValidatorBuilder(registry, pipeline.SerializedValidatorSpec{
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ValidatorSpec: Spec(), SupportsChunks: true, SupportsArtifacts: true,
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}, validateOptions, func(request pipeline.BuildRequest) (contracts.SerializedValidator, error) {
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options, err := DecodeOptions(request.Options)
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if err != nil {
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return nil, err
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}
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return New(options), nil
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})
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}
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func DecodeOptions(options map[string]any) (Options, error) {
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if err := pipeline.RejectUnknownOptions(options); err != nil {
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return Options{}, err
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}
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return Options{}, nil
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}
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func validateOptions(options map[string]any) error { _, err := DecodeOptions(options); return err }
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