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builder.go
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builder.go
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package analysisrequest
import (
"context"
"encoding/json"
"errors"
"fmt"
"os"
"path/filepath"
"reflect"
"github.com/listendev/pkg/npm"
"github.com/listendev/pkg/observability/tracer"
"github.com/listendev/pkg/pypi"
)
var (
errBuilderInvalidAnalysisRequest = errors.New("invalid analysis request")
)
type builder struct {
ctx context.Context
npmRegistryClient npm.Registry
pypiRegistryClient pypi.Registry
}
//nolint:revive // we are doing this on purpose (for now)
func NewBuilder(ctx context.Context) (*builder, error) {
t := tracer.FromContext(ctx)
if t == nil {
return nil, fmt.Errorf("couldn't retrieve the tracer from context")
}
return &builder{
ctx: ctx,
npmRegistryClient: npm.NewNoOpRegistryClient(),
}, nil
}
func (b *builder) WithNPMRegistryClient(client npm.Registry) {
if client == nil || reflect.ValueOf(client).IsNil() {
b.npmRegistryClient = npm.NewNoOpRegistryClient()
return
}
b.npmRegistryClient = client
}
func (b *builder) WithPyPiRegistryClient(client pypi.Registry) {
if client == nil || reflect.ValueOf(client).IsNil() {
b.pypiRegistryClient = pypi.NewNoOpRegistryClient()
return
}
b.pypiRegistryClient = client
}
func (b *builder) FromFile(path string) ([]AnalysisRequest, error) {
fileInfo, err := os.Stat(path)
if err != nil {
return nil, fmt.Errorf("could not find the file at path %s: %v", path, err)
}
if !fileInfo.Mode().IsRegular() || filepath.Ext(path) != ".json" {
return nil, fmt.Errorf("the file at path %q is not a valid json file: %v", path, err)
}
// Read file content
data, readErr := os.ReadFile(path)
if readErr != nil {
return nil, fmt.Errorf("could not open the file at path %q: %v", path, readErr)
}
contents := []json.RawMessage{}
decodeErr := json.Unmarshal(data, &contents)
if decodeErr == nil {
// Try list of elements
results := []AnalysisRequest{}
for _, msg := range contents {
res, errJSON := b.FromJSON(msg)
if errJSON != nil {
return nil, errJSON
}
results = append(results, res)
}
return results, nil
}
// Try single element
content := json.RawMessage{}
if errJSON := json.Unmarshal(data, &content); errJSON != nil {
return nil, errJSON
}
res, err := b.FromJSON(content)
if err != nil {
return nil, err
}
return []AnalysisRequest{res}, nil
}
func (b *builder) getNPMAnalysisRequest(body []byte) (AnalysisRequest, error) {
var arn NPM
if err := json.Unmarshal(body, &arn); err != nil {
return nil, err
}
if err := arn.fillMissingData(b.ctx, b.npmRegistryClient); err != nil {
return nil, err
}
return &arn, nil
}
func (b *builder) getPyPiAnalysisRequest(body []byte) (AnalysisRequest, error) {
var arp PyPi
if err := json.Unmarshal(body, &arp); err != nil {
return nil, err
}
if err := arp.fillMissingData(b.ctx, b.pypiRegistryClient); err != nil {
return nil, err
}
return &arp, nil
}
func (b *builder) FromJSON(body []byte) (AnalysisRequest, error) {
t := tracer.FromContext(b.ctx)
_, span := t.Start(b.ctx, "analysysrequest.Builder.UnmarshalJSON")
defer span.End()
var arb base
if err := json.Unmarshal(body, &arb); err != nil {
return nil, err
}
// TODO: adjust condition while evolving
switch arb.RequestType {
// NPM
// TODO: uncomment when ready
// case NPMTestWhileDynamicInstrumentation:
// fallthrough
case NPMInstallWhileDynamicInstrumentationAIEnriched:
fallthrough
case NPMAdvisory:
fallthrough
case NPMTyposquat:
fallthrough
case NPMMetadataEmptyDescription:
fallthrough
case NPMMetadataMaintainersEmailCheck:
fallthrough
case NPMMetadataVersion:
fallthrough
case NPMMetadataMismatches:
fallthrough
case NPMStaticAnalysisEnvExfiltration:
fallthrough
case NPMStaticAnalysisDetachedProcessExecution:
fallthrough
case NPMStaticAnalysisEvalBase64:
fallthrough
case NPMStaticAnalysisShadyLinks:
fallthrough
case NPMStaticAnalysisInstallScript:
fallthrough
case NPMStaticNonRegistryDependency:
fallthrough
case NPMInstallWhileDynamicInstrumentation:
return b.getNPMAnalysisRequest(body)
// PyPi
case PypiTyposquat:
fallthrough
case PypiMetadataMaintainersEmailCheck:
fallthrough
case PypiStaticAnalysisEnvExfiltration:
fallthrough
case PypiStaticAnalysisDetachedProcessExecution:
fallthrough
case PypiStaticAnalysisEvalBase64:
fallthrough
case PypiStaticAnalysisCodeExecutionAtSetup:
fallthrough
case PypiStaticAnalysisShadyLinks:
fallthrough
case PypiStaticNonRegistryDependency:
return b.getPyPiAnalysisRequest(body)
// NOP
case Nop:
return &NOP{arb}, nil
}
return nil, errBuilderInvalidAnalysisRequest
}
type noOpBuilder struct {
}
//nolint:revive // we are doing this on purpose (for now)
func NewNoOpBuilder() *noOpBuilder {
return &noOpBuilder{}
}
func (b *noOpBuilder) FromJSON(_ []byte) (AnalysisRequest, error) {
return &NOP{}, nil
}