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validate.go
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validate.go
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package validate
import (
"os"
"regexp"
"strings"
"github.com/anz-bank/sysl/pkg/msg"
"github.com/anz-bank/sysl/pkg/parse"
sysl "github.com/anz-bank/sysl/pkg/sysl"
"github.com/anz-bank/sysl/pkg/syslutil"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/afero"
)
var depPathRegEx = regexp.MustCompile("^[[:alnum:]]+([.][[:alnum:]]+)*(/[[:alnum:]]+)*[/]?$")
var basePathRegEx = regexp.MustCompile("^/[[:alnum:]]+(/[[:alnum:]]+)*$")
type Validator struct {
grammar *sysl.Application
transform *sysl.Application
assignTypes map[string]parse.TypeData
letTypes map[string]parse.TypeData
messages map[string][]msg.Msg
}
type Params struct {
RootTransform string
Transform string
Grammar string
DepPath string
Start string
BasePath string
Filesystem afero.Fs
Logger *logrus.Logger
}
func DoValidate(validateParams Params) error {
logrus.Debugf("root-transform: %s\n", validateParams.RootTransform)
logrus.Debugf("transform: %s\n", validateParams.Transform)
logrus.Debugf("dep-path: %s\n", validateParams.DepPath)
logrus.Debugf("grammar: %s\n", validateParams.Grammar)
logrus.Debugf("start: %s\n", validateParams.Start)
logrus.Debugf("basepath: %s\n", validateParams.BasePath)
grammar, err := LoadGrammar(validateParams.Grammar, validateParams.Filesystem)
if err != nil {
return err
}
parser := parse.NewParser()
transform, err := loadTransform(
validateParams.Transform,
syslutil.NewChrootFs(validateParams.Filesystem, validateParams.RootTransform),
parser,
)
if err != nil {
return err
}
validator := NewValidator(grammar, transform, parser)
validator.Validate(validateParams.Start, validateParams.DepPath, validateParams.BasePath)
validator.LogMessages()
if len(validator.GetMessages()) > 0 {
msg.NewMsg(msg.ErrValidationFailed, nil).LogMsg()
return errors.New("validation failed")
}
msg.NewMsg(msg.InfoValidatedSuccessfully, nil).LogMsg()
return nil
}
func (v *Validator) Validate(start, depPath, basepath string) {
v.validateEntryPoint(start)
v.validateDependencyPath(depPath)
v.validateBasePath(basepath)
v.validateFileName()
v.validateViews()
v.validateReturn()
}
func (v *Validator) LogMessages() {
for viewName, messages := range v.GetMessages() {
msg.NewMsg(msg.TitleViewName, []string{viewName}).LogMsg()
for _, message := range messages {
message.LogMsg()
}
}
}
func (v *Validator) validateDependencyPath(depPath string) {
if depPath == "" {
return
}
if match := depPathRegEx.MatchString(depPath); !match {
v.messages["DepPath"] = append(v.messages["DepPath"],
*msg.NewMsg(msg.ErrDepPathInvalid, []string{depPath, depPathRegEx.String()}))
}
}
func (v *Validator) validateBasePath(basepath string) {
if basepath == "" || basepath == "/" {
return
}
if match := basePathRegEx.MatchString(basepath); !match {
v.messages["BasePath"] = append(v.messages["BasePath"],
*msg.NewMsg(msg.ErrBasePathInvalid, []string{basepath, basePathRegEx.String()}))
}
}
func (v *Validator) validateEntryPoint(start string) {
view, exists := v.transform.Views[start]
if !exists {
v.messages["EntryPoint"] = append(v.messages["EntryPoint"], *msg.NewMsg(msg.ErrEntryPointUndefined, []string{start}))
return
}
typeName := getTypeName(view.GetRetType())
if typeName != start || isCollectionType(view.GetRetType()) {
v.messages["EntryPoint"] = append(v.messages["EntryPoint"],
*msg.NewMsg(msg.ErrInvalidEntryPointReturn, []string{typeName, start}))
}
}
func (v *Validator) validateFileName() {
viewName := "filename"
view, exists := v.transform.Views[viewName]
if !exists {
v.messages[viewName] = append(v.messages[viewName], *msg.NewMsg(msg.ErrUndefinedView, []string{viewName}))
return
}
if getTypeName(view.GetRetType()) != "STRING" || isCollectionType(view.GetRetType()) {
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrInvalidReturn, []string{viewName, "Expected type is string"}))
}
hasFileNameAssign := false
for _, stmt := range view.GetExpr().GetTransform().GetStmt() {
if stmt.GetAssign() != nil {
hasFileNameAssign = hasFileNameAssign || stmt.GetAssign().GetName() == viewName
if stmt.GetAssign().GetName() != viewName {
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrExcessAttr, []string{stmt.GetAssign().GetName(), viewName, "string"}))
}
}
}
if !hasFileNameAssign {
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrMissingReqField, []string{viewName, viewName, "string"}))
}
}
func (v *Validator) validateViews() {
for viewName, resolvedTypes := range v.assignTypes {
typeName := getTypeName(resolvedTypes.RefType)
resolvedType := resolvedTypes.Tuple
if grammarType, exists := v.grammar.Types[typeName]; exists {
switch t := grammarType.Type.(type) {
case *sysl.Type_Tuple_:
v.compareTuple(t.Tuple, resolvedType.GetTuple(),
getAttrNames(resolvedType.GetTuple().GetAttrDefs()), viewName, typeName)
default:
logrus.Warnf("[validate.validateViews] Unhandled grammar type: %T", t)
}
}
}
for viewName, resolvedTypes := range v.letTypes {
typeName := getTypeName(resolvedTypes.RefType)
resolvedType := resolvedTypes.Tuple
if grammarType, exists := v.grammar.Types[typeName]; exists {
switch t := grammarType.Type.(type) {
case *sysl.Type_Tuple_:
v.compareTuple(t.Tuple, resolvedType.GetTuple(),
getAttrNames(resolvedType.GetTuple().GetAttrDefs()), viewName, typeName)
default:
logrus.Warnf("[validate.validateViews] Unhandled grammar type: %T", t)
}
}
}
}
func (v *Validator) compareTuple(
specTuple, implTuple *sysl.Type_Tuple,
implAttrNames map[string]struct{},
viewName, specTupleName string,
) {
grammarSpec := v.grammar.Types
specAttrs := specTuple.GetAttrDefs()
implAttrs := implTuple.GetAttrDefs()
for ikey, ival := range implTuple.GetAttrDefs() {
if ival.GetTuple() == nil {
continue
}
if grammarType, exists := grammarSpec[ikey]; exists {
v.compareTuple(
grammarType.GetTuple(), ival.GetTuple(), getAttrNames(ival.GetTuple().GetAttrDefs()), viewName, ikey)
}
}
for gk, gv := range specAttrs {
if specOneOf := grammarSpec[gk].GetOneOf(); specOneOf != nil {
v.compareOneOf(specOneOf, implTuple, implAttrNames, viewName, specTupleName)
} else if _, exists := implAttrs[gk]; !exists {
if !gv.GetOpt() {
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrMissingReqField, []string{gk, viewName, specTupleName}))
}
} else {
delete(implAttrNames, gk)
}
}
for attrName := range implAttrNames {
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrExcessAttr, []string{attrName, viewName, specTupleName}))
delete(implAttrNames, attrName)
}
}
func (v *Validator) compareOneOf(
specOneOf *sysl.Type_OneOf,
implTuple *sysl.Type_Tuple,
implAttrNames map[string]struct{},
viewName, specTupleName string,
) {
implAttrs := implTuple.GetAttrDefs()
matching := true
grammarSpec := v.grammar.Types
for _, one := range specOneOf.GetType() {
name := one.GetTypeRef().GetRef().GetPath()[0]
if strings.Index(name, "__Choice_Combination_") == 0 {
if len(implAttrs) == 1 {
continue
}
v.compareTuple(grammarSpec[name].GetTuple(), implTuple, implAttrNames, viewName, specTupleName)
break
} else if _, matching = implAttrs[name]; matching {
delete(implAttrNames, name)
break
}
}
if !matching {
var implAttrNames []string
for k := range implAttrs {
implAttrNames = append(implAttrNames, k)
}
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrInvalidOption, []string{viewName, strings.Join(implAttrNames, ","), specTupleName}))
}
}
func (v *Validator) validateReturn() {
for viewName, view := range v.transform.GetViews() {
v.validateTfmReturn(viewName, view.GetExpr(), view.GetRetType())
}
}
func (v *Validator) validateTfmReturn(viewName string, expr *sysl.Expr, retType *sysl.Type) {
if tfm, ok := expr.Expr.(*sysl.Expr_Transform_); ok {
for _, stmt := range tfm.Transform.GetStmt() {
switch s := stmt.Stmt.(type) {
case *sysl.Expr_Transform_Stmt_Assign_:
v.validateTfmReturn(viewName, s.Assign.GetExpr(), s.Assign.GetExpr().Type)
case *sysl.Expr_Transform_Stmt_Let:
v.validateTfmReturn(viewName, s.Let.GetExpr(), s.Let.GetExpr().Type)
}
}
switch retType.Type.(type) {
case *sysl.Type_Sequence, *sysl.Type_Set:
if tfm.Transform.Scopevar == "." {
typeName, typeDetail := syslutil.GetTypeDetail(retType)
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrInvalidReturn, []string{viewName, "Expected a " + typeName + " of " + typeDetail}))
}
default:
if tfm.Transform.Scopevar != "." {
_, typeDetail := syslutil.GetTypeDetail(retType)
v.messages[viewName] = append(v.messages[viewName],
*msg.NewMsg(msg.ErrInvalidReturn, []string{viewName, "Expected a single " + typeDetail}))
}
}
}
}
func (v *Validator) GetMessages() map[string][]msg.Msg {
return v.messages
}
func NewValidator(grammar, transform *sysl.Application, parser *parse.Parser) *Validator {
return &Validator{
grammar: grammar,
transform: transform,
assignTypes: parser.GetAssigns(),
letTypes: parser.GetLets(),
messages: parser.GetMessages()}
}
func getTypeName(syslType *sysl.Type) string {
if syslType == nil {
return "Unknown"
}
switch t := syslType.Type.(type) {
case *sysl.Type_Primitive_:
return t.Primitive.String()
case *sysl.Type_Sequence:
if typeName := t.Sequence.GetPrimitive().String(); typeName != "NO_Primitive" {
return typeName
}
return t.Sequence.GetTypeRef().GetRef().GetPath()[0]
case *sysl.Type_TypeRef:
if t.TypeRef.GetRef().GetAppname() != nil {
return t.TypeRef.GetRef().GetAppname().GetPart()[0]
}
return t.TypeRef.GetRef().GetPath()[0]
default:
return "Unknown"
}
}
func isCollectionType(syslType *sysl.Type) bool {
switch syslType.Type.(type) {
case *sysl.Type_Set, *sysl.Type_Sequence, *sysl.Type_List_, *sysl.Type_Map_:
return true
default:
return false
}
}
func getAttrNames(attrs map[string]*sysl.Type) map[string]struct{} {
implAttrNames := map[string]struct{}{}
for attrName := range attrs {
implAttrNames[attrName] = struct{}{}
}
return implAttrNames
}
func loadTransform(transformFile string, fs afero.Fs, p *parse.Parser) (*sysl.Application, error) {
transform, name, err := parse.LoadAndGetDefaultApp(transformFile, fs, p)
if err != nil {
return nil, err
}
return transform.GetApps()[name], nil
}
// LoadGrammar loads sysl conversion of given grammar.
// eg: if grammarFile is ./foo/bar.g, this tries to load ./foo/bar.sysl
func LoadGrammar(grammarFile string, fs afero.Fs) (*sysl.Application, error) {
tokens := strings.Split(grammarFile, string(os.PathSeparator))
tokens[len(tokens)-1] = changeFileExtension(tokens[len(tokens)-1], "sysl")
syslFile := strings.Join(tokens, string(os.PathSeparator))
grammar, name, err := parse.LoadAndGetDefaultApp(syslFile, fs, parse.NewParser())
if err != nil {
return nil, err
}
return grammar.GetApps()[name], nil
}
func changeFileExtension(filename, extension string) string {
parts := strings.Split(filename, ".")
if len(parts) == 1 {
parts = append(parts, "") // add empty extension to be replaced.
}
parts[len(parts)-1] = extension
return strings.Join(parts, ".")
}