/
resolver_generator.go
443 lines (398 loc) · 16.8 KB
/
resolver_generator.go
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package generator
import (
"fmt"
"go/ast"
"sort"
"strings"
log "github.com/sirupsen/logrus"
"github.com/vmware-tanzu/graph-framework-for-microservices/compiler/pkg/parser"
"github.com/vmware-tanzu/graph-framework-for-microservices/compiler/pkg/util"
)
// populateValuesForEachNode populates each node with required resolver properties
func populateValuesForEachNode(nodes []*NodeProperty, linkAPI map[string]string, retMap map[string]ReturnStatement) []NodeProperty {
var nodeProperties []NodeProperty
for _, n := range nodes {
resNodeProp := NodeProperty{}
resNodeProp.GroupResourceNameTitle = util.GetGroupResourceNameTitle(n.NodeName)
resNodeProp.Alias = n.Alias
resNodeProp.ReturnType = n.ReturnType
resNodeProp.BaseImportPath = n.BaseImportPath
resNodeProp.GraphqlSchemaFields = n.GraphqlSchemaFields
resNodeProp.IsSingletonNode = n.IsSingletonNode
resNodeProp.CustomQueries = n.CustomQueries
resNodeProp.IsNexusNode = n.IsNexusNode
resNodeProp.ResolverFields = n.ResolverFields
resNodeProp.ResolverCount = n.ResolverCount
resNodeProp.PkgName = n.PkgName
resNodeProp.NodeName = n.NodeName
resNodeProp.SchemaName = n.SchemaName
// populate return values for root of the graph
if !n.HasParent && n.IsParentNode {
resNodeProp.Alias = retMap[resNodeProp.PkgName+resNodeProp.NodeName].Alias
resNodeProp.ReturnType = retMap[resNodeProp.PkgName+resNodeProp.NodeName].ReturnType
resNodeProp.IsParentNode = true
}
// populate return values for child fields
for _, f := range n.ChildFields {
f.ReturnType = retMap[f.FieldTypePkgPath].ReturnType
f.Alias = retMap[f.FieldTypePkgPath].Alias
f.FieldCount = retMap[f.FieldTypePkgPath].FieldCount
f.CRDName = retMap[f.FieldTypePkgPath].CRDName
f.ChainAPI = retMap[f.FieldTypePkgPath].ChainAPI
f.IsSingleton = retMap[f.FieldTypePkgPath].IsSingleton
f.IsResolver = true
resNodeProp.ResolverCount = 1
if f.IsSingleton {
f.SchemaFieldName = fmt.Sprintf("%s: %s!", f.FieldName, f.SchemaTypeName)
} else {
f.SchemaFieldName = fmt.Sprintf("%s(Id: ID): %s!", f.FieldName, f.SchemaTypeName)
}
f.LinkAPI = linkAPI[f.PkgName+f.NodeName]
resNodeProp.ChildFields = append(resNodeProp.ChildFields, f)
resNodeProp.GraphqlSchemaFields = append(resNodeProp.GraphqlSchemaFields, f)
}
// populate return values for multiple child fields
for _, f := range n.ChildrenFields {
f.ReturnType = retMap[f.FieldTypePkgPath].ReturnType
f.Alias = retMap[f.FieldTypePkgPath].Alias
f.FieldCount = retMap[f.FieldTypePkgPath].FieldCount
f.CRDName = retMap[f.FieldTypePkgPath].CRDName
f.ChainAPI = retMap[f.FieldTypePkgPath].ChainAPI
f.IsSingleton = retMap[f.FieldTypePkgPath].IsSingleton
f.LinkAPI = linkAPI[f.PkgName+f.NodeName]
resNodeProp.ChildrenFields = append(resNodeProp.ChildrenFields, f)
}
// populate return values for link fields
for _, f := range n.LinkFields {
f.ReturnType = retMap[f.FieldTypePkgPath].ReturnType
f.Alias = retMap[f.FieldTypePkgPath].Alias
f.FieldCount = retMap[f.FieldTypePkgPath].FieldCount
f.CRDName = retMap[f.FieldTypePkgPath].CRDName
f.ChainAPI = retMap[f.FieldTypePkgPath].ChainAPI
f.IsSingleton = retMap[f.FieldTypePkgPath].IsSingleton
f.LinkAPI = linkAPI[f.PkgName+f.NodeName]
resNodeProp.LinkFields = append(resNodeProp.LinkFields, f)
}
// populate return values for multiple link fields
for _, f := range n.LinksFields {
f.ReturnType = retMap[f.FieldTypePkgPath].ReturnType
f.Alias = retMap[f.FieldTypePkgPath].Alias
f.FieldCount = retMap[f.FieldTypePkgPath].FieldCount
f.CRDName = retMap[f.FieldTypePkgPath].CRDName
f.ChainAPI = retMap[f.FieldTypePkgPath].ChainAPI
f.IsSingleton = retMap[f.FieldTypePkgPath].IsSingleton
f.LinkAPI = linkAPI[f.PkgName+f.NodeName]
resNodeProp.LinksFields = append(resNodeProp.LinksFields, f)
}
nodeProperties = append(nodeProperties, resNodeProp)
}
return nodeProperties
}
func populateValuesForResolver(nodes []*NodeProperty, parentsMap map[string]parser.NodeHelper,
crdNameMap, nonStructMap map[string]string) (map[string]string, map[string]ReturnStatement) {
linkAPI := make(map[string]string)
retMap := make(map[string]ReturnStatement)
for _, n := range nodes {
var (
retType, aliasVal, listRetVal, ChainAPI string
fieldCount int
IsSingleton bool
)
retType += fmt.Sprintf("ret := &model.%s%s {\n", n.PkgName, n.NodeName)
if n.IsNexusNode || n.IsSingletonNode {
retType += fmt.Sprintf("\t%s: &%s,\n", "Id", "dn")
aliasVal += fmt.Sprintf("%s := v%s.DisplayName()\n", "dn", n.NodeName)
retType += fmt.Sprintf("\t%s: %s,\n", "ParentLabels", "parentLabels")
aliasVal += fmt.Sprintf("%s := map[string]interface{}{%q:%s}\n", "parentLabels", n.CrdName, "dn")
ChainAPI += "nc"
var prevNode parser.NodeHelper
for _, i := range parentsMap[n.CrdName].Parents {
currentNode := parentsMap[i]
if len(currentNode.Parents) == 0 {
// root of the graph
if currentNode.IsSingleton {
ChainAPI += fmt.Sprintf(".%s()", crdNameMap[i])
} else {
ChainAPI += fmt.Sprintf(".%s(getParentName(obj.ParentLabels, %q))", crdNameMap[i], i)
}
} else {
if childNode, ok := prevNode.Children[i]; ok {
if currentNode.IsSingleton {
ChainAPI += fmt.Sprintf(".%s()", childNode.FieldName)
} else {
ChainAPI += fmt.Sprintf(".%s(getParentName(obj.ParentLabels, %q))", childNode.FieldName, i)
}
}
}
// cache the non-leaf node
prevNode = currentNode
}
// Create linkAPI
if n.IsSingletonNode {
IsSingleton = true
if !n.HasParent && n.IsParentNode {
linkAPI[n.PkgName+n.NodeName] = fmt.Sprintf("%s.Get%s(context.TODO())", ChainAPI, n.PkgName+n.NodeName)
} else {
linkAPI[n.PkgName+n.NodeName] = fmt.Sprintf("%s.Get%s(context.TODO())", ChainAPI, prevNode.Children[n.CrdName].FieldName)
}
} else {
IsSingleton = false
if !n.HasParent && n.IsParentNode {
linkAPI[n.PkgName+n.NodeName] = fmt.Sprintf("%s.Get%s(context.TODO(), getParentName(obj.ParentLabels, %q))", ChainAPI, n.PkgName+n.NodeName, n.CrdName)
} else {
linkAPI[n.PkgName+n.NodeName] = fmt.Sprintf("%s.Get%s(context.TODO(), getParentName(obj.ParentLabels, %q))", ChainAPI, prevNode.Children[n.CrdName].FieldName, n.CrdName)
}
}
}
for _, i := range n.ResolverFields[n.PkgName+n.NodeName] {
if i.IsMapTypeField || i.IsStringType {
fieldCount += 1
retType += fmt.Sprintf("\t%s: &%sData,\n", i.FieldName, i.FieldName)
aliasVal += jsonMarshalResolver(i.FieldName, n.NodeName)
} else if i.IsStdTypeField {
if len(convertGoStdType(i.FieldType)) != 0 {
fieldCount += 1
retType += fmt.Sprintf("\t%s: &v%s,\n", i.FieldName, i.FieldName)
listRetVal += fmt.Sprintf("v%s := %s(i.%s)\n", i.FieldName, convertGoStdType(i.FieldType), i.FieldName)
aliasVal += fmt.Sprintf("v%s := %s(v%s.Spec.%s)\n", i.FieldName, convertGoStdType(i.FieldType), i.NodeName, i.FieldName)
}
}
}
retType += "\t}"
retMap[n.PkgName+n.NodeName] = ReturnStatement{
Alias: aliasVal,
ReturnType: retType,
FieldCount: fieldCount,
CRDName: n.CrdName,
ChainAPI: ChainAPI,
IsSingleton: IsSingleton,
}
}
return linkAPI, retMap
}
// processNonNexusFields process and populates properties for each non nexus fields
// <Domain string>
func processNonNexusFields(aliasNameMap map[string]string, node *ast.TypeSpec,
nodeProp *NodeProperty, simpleGroupTypeName string) {
resField := make(map[string][]FieldProperty)
for _, f := range parser.GetSpecFields(node) {
var (
fieldProp FieldProperty
err error
)
typeString := ConstructType(aliasNameMap, f)
// populate each field properties
if len(f.Names) > 0 {
fieldProp.FieldName, err = parser.GetNodeFieldName(f)
if err != nil {
log.Fatalf("failed to determine field name: %v", err)
}
fieldProp.FieldType = typeString
fieldProp.PkgName = simpleGroupTypeName
fieldProp.NodeName = node.Name.String()
}
if parser.IgnoreField(f) {
continue
}
if parser.IsJsonStringField(f) || parser.IsFieldAnnotationPresent(f, parser.GRAPHQL_JSONENCODED_ANNOTATION) {
fieldProp.IsStringType = true
fieldProp.SchemaFieldName = fmt.Sprintf("%s: %s", fieldProp.FieldName, "String")
resField[nodeProp.PkgName+nodeProp.NodeName] = append(resField[nodeProp.PkgName+nodeProp.NodeName], fieldProp)
} else {
stdType := convertGraphqlStdType(typeString)
// standard type
if len(stdType) != 0 {
fieldProp.IsStdTypeField = true
fieldProp.SchemaFieldName = fmt.Sprintf("%s: %s", fieldProp.FieldName, stdType)
resField[nodeProp.PkgName+nodeProp.NodeName] = append(resField[nodeProp.PkgName+nodeProp.NodeName], fieldProp)
} else {
fieldProp.SchemaFieldName = fmt.Sprintf("%s: %s", fieldProp.FieldName, "String")
fieldProp.IsStringType = true
resField[nodeProp.PkgName+nodeProp.NodeName] = append(resField[nodeProp.PkgName+nodeProp.NodeName], fieldProp)
}
}
nodeProp.GraphqlSchemaFields = append(nodeProp.GraphqlSchemaFields, fieldProp)
nodeProp.ResolverFields = resField
}
}
// SkipSecretSpecAnnotation checks if the field has nexus secrets annotated on them
// If yes, the field is skipped in the response.
func SkipSecretSpecAnnotation(fieldName, nfType string, pkg parser.Package, importMap map[string]string, pkgs map[string]parser.Package) bool {
fieldPkg := &pkg
structType := nfType
if ptParts := strings.Split(nfType, "."); len(ptParts) == 2 { //servicegroup.SvcGroup
structType, fieldPkg = findTypeAndPkgForField(ptParts, importMap, pkgs)
}
if len(structType) != 0 {
if _, ok := parser.GetNexusSecretSpecAnnotation(*fieldPkg, structType); ok {
log.Debugf("Ignoring the field %s since the node is annotated as nexus secret", fieldName)
return true
}
}
return false
}
// processNexusFields process and populates properties for each nexus fields
// <gns.Gns `nexus:"child"`>
func processNexusFields(pkg parser.Package, aliasNameMap map[string]string, node *ast.TypeSpec,
nodeProp *NodeProperty, simpleGroupTypeName string, pkgs map[string]parser.Package) {
importMap := pkg.GetImportMap()
for _, nf := range parser.GetNexusFields(node) {
var (
fieldProp FieldProperty
err error
)
if len(nf.Names) > 0 {
fieldProp.FieldName, err = parser.GetNodeFieldName(nf)
if err != nil {
log.Fatalf("Failed to determine field name: %v", err)
}
fieldProp.PkgName = simpleGroupTypeName
fieldProp.NodeName = node.Name.String()
}
// Except for nexus fields (nexus.Node and nexus.SingletonNode),
// this will check other fields to see whether they have nexus secrets annotated on them
// If yes, the field is ignored in the response.
if !parser.IsNexusTypeField(nf) {
nfType := parser.GetFieldType(nf)
if SkipSecretSpecAnnotation(fieldProp.FieldName, nfType, pkg, importMap, pkgs) {
continue
}
}
// `Ignore:true` annotation used to ignore the specific field `nexus-graphql:"ignore:true"`
if parser.IgnoreField(nf) {
continue
}
// `type:string` annotation used to consider the type as string `nexus-graphql:"type:string"`
if parser.IsJsonStringField(nf) {
fieldProp.IsStringType = true
fieldProp.SchemaFieldName = fmt.Sprintf("%s: %s", fieldProp.FieldName, "String")
}
// denote field is nexus or singletonField type
if parser.IsNexusTypeField(nf) {
fieldProp.IsNexusOrSingletonField = true
// Add Custom Query + ID
fieldProp.SchemaFieldName = CustomQuerySchema
for _, customQuery := range nodeProp.CustomQueries {
fieldProp.SchemaFieldName += CustomQueryToGraphqlSchema(customQuery)
var customQueryFieldProp FieldProperty
customQueryFieldProp.IsResolver = true
customQueryFieldProp.FieldName = customQuery.Name
nodeProp.GraphqlSchemaFields = append(nodeProp.GraphqlSchemaFields, customQueryFieldProp)
nodeProp.ResolverCount += 1
}
}
// nexus link field
typeString := ConstructType(aliasNameMap, nf)
if parser.IsOnlyLinkField(nf) {
schemaTypeName, resolverTypeName := ValidateImportPkg(nodeProp.PkgName, typeString, importMap, pkgs)
// `type:string` annotation used to consider the type as string `nexus-graphql:"type:string"`
fieldProp.SchemaFieldName = fmt.Sprintf("%s: %s!", fieldProp.FieldName, schemaTypeName)
fieldProp.IsResolver = true
fieldProp.IsNexusTypeField = true
fieldProp.FieldType = typeString
fieldProp.FieldTypePkgPath = resolverTypeName
fieldProp.SchemaTypeName = schemaTypeName
fieldProp.BaseTypeName = getBaseNodeType(typeString)
nodeProp.LinkFields = append(nodeProp.LinkFields, fieldProp)
}
// nexus child field
if parser.IsOnlyChildField(nf) {
schemaTypeName, resolverTypeName := ValidateImportPkg(nodeProp.PkgName, typeString, importMap, pkgs)
fieldProp.SchemaFieldName = fmt.Sprintf("%s: %s!", fieldProp.FieldName, schemaTypeName)
fieldProp.SchemaTypeName = schemaTypeName
fieldProp.IsNexusTypeField = true
fieldProp.FieldType = typeString
fieldProp.FieldTypePkgPath = resolverTypeName
fieldProp.BaseTypeName = getBaseNodeType(typeString)
nodeProp.ChildFields = append(nodeProp.ChildFields, fieldProp)
}
// nexus children or links field
if parser.IsNamedChildOrLink(nf) {
fieldProp.IsChildrenOrLinks = true
schemaTypeName, resolverTypeName := ValidateImportPkg(nodeProp.PkgName, typeString, importMap, pkgs)
fieldProp.SchemaFieldName = fmt.Sprintf("%s(Id: ID): [%s!]", fieldProp.FieldName, schemaTypeName)
fieldProp.IsResolver = true
fieldProp.IsNexusTypeField = true
fieldProp.FieldType = typeString
fieldProp.FieldTypePkgPath = resolverTypeName
fieldProp.SchemaTypeName = schemaTypeName
fieldProp.BaseTypeName = getBaseNodeType(typeString)
if parser.IsOnlyChildrenField(nf) {
nodeProp.ChildrenFields = append(nodeProp.ChildrenFields, fieldProp)
} else {
nodeProp.LinksFields = append(nodeProp.LinksFields, fieldProp)
}
}
// no. of resolver field in a node
if fieldProp.IsResolver {
nodeProp.ResolverCount += 1
}
if !parser.IsOnlyChildField(nf) {
nodeProp.GraphqlSchemaFields = append(nodeProp.GraphqlSchemaFields, fieldProp)
}
}
}
// GenerateGraphqlResolverVars populates the node and its field properties required to generate graphql resolver
func GenerateGraphqlResolverVars(baseGroupName, crdModulePath string, pkgs parser.Packages, parentsMap map[string]parser.NodeHelper) ([]NodeProperty, error) {
sortedKeys := make([]string, 0, len(pkgs))
for k := range pkgs {
sortedKeys = append(sortedKeys, k)
}
sort.Strings(sortedKeys)
sortedPackages := make([]parser.Package, len(pkgs))
for i, k := range sortedKeys {
sortedPackages[i] = pkgs[k]
}
// Iterate all the struct type and it's fields in the sortedPackages and
// set the node and field properties accordingly.
var nodes []*NodeProperty
aliasNameMap := make(map[string]string)
rootOfGraph := false
for _, pkg := range sortedPackages {
simpleGroupTypeName := util.GetSimpleGroupTypeName(pkg.Name)
// Iterating struct type
for _, node := range pkg.GetStructs() {
// Skip Empty struct type
if len(parser.GetNexusFields(node)) == 0 && len(parser.GetSpecFields(node)) == 0 {
continue
}
typeName := parser.GetTypeName(node)
if _, ok := parser.GetNexusSecretSpecAnnotation(pkg, typeName); ok {
log.Debugf("Ignoring the node %s since the node is annotated as nexus secret", typeName)
continue
}
nodeProp := &NodeProperty{}
// populate node properties
nodeProp.PkgName = simpleGroupTypeName
nodeProp.NodeName = node.Name.String()
nodeProp.BaseImportPath = crdModulePath
nodeProp.CrdName = util.GetCrdName(node.Name.String(), pkg.Name, baseGroupName)
nodeHelper := parentsMap[nodeProp.CrdName]
nodeProp.IsParentNode = parser.IsNexusNode(node)
nodeProp.CustomQueries = nodeHelper.GraphqlQuerySpec.Queries
if parser.IsNexusNode(node) && len(nodeHelper.Parents) == 0 && !rootOfGraph {
log.Debugf("Root of the graph, [Node: %s]", nodeProp.NodeName)
}
if parser.IsNexusNode(node) && len(nodeHelper.Parents) == 0 && rootOfGraph {
log.Fatalf("[Node: %s] doesn't have parent", nodeProp.NodeName)
}
if parser.IsNexusNode(node) {
rootOfGraph = isRootOfGraph(nodeHelper.Parents, rootOfGraph)
}
setNexusProperties(nodeHelper, node, nodeProp)
nodeProp.SchemaName = fmt.Sprintf("%s_%s", pkg.Name, parser.GetTypeName(node))
// Iterate each node's nexus fields and set its properties
processNexusFields(pkg, aliasNameMap, node, nodeProp, simpleGroupTypeName, pkgs)
// Iterate each node's non-nexus fields and set its properties
processNonNexusFields(aliasNameMap, node, nodeProp, simpleGroupTypeName)
nodes = append(nodes, nodeProp)
}
}
crdNameMap := constructNexusTypeMap(nodes)
// populate return values of each Node for resolver
nonStructMap := constructAliasType(sortedPackages)
linkAPI, retMap := populateValuesForResolver(nodes, parentsMap, crdNameMap, nonStructMap)
// populate return values of each node
nodeProperties := populateValuesForEachNode(nodes, linkAPI, retMap)
return nodeProperties, nil
}