132 lines
4.6 KiB
Go
132 lines
4.6 KiB
Go
package swag
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import (
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"errors"
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"fmt"
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"go/ast"
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"strings"
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)
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// ErrFailedConvertPrimitiveType Failed to convert for swag to interpretable type
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var ErrFailedConvertPrimitiveType = errors.New("swag property: failed convert primitive type")
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type propertyName struct {
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SchemaType string
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ArrayType string
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CrossPkg string
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}
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type propertyNewFunc func(schemeType string, crossPkg string) propertyName
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func newArrayProperty(schemeType string, crossPkg string) propertyName {
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return propertyName{
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SchemaType: "array",
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ArrayType: schemeType,
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CrossPkg: crossPkg,
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}
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}
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func newProperty(schemeType string, crossPkg string) propertyName {
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return propertyName{
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SchemaType: schemeType,
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ArrayType: "string",
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CrossPkg: crossPkg,
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}
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}
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func convertFromSpecificToPrimitive(typeName string) (string, error) {
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typeName = strings.ToUpper(typeName)
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switch typeName {
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case "TIME", "OBJECTID", "UUID":
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return "string", nil
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case "DECIMAL":
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return "number", nil
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}
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return "", ErrFailedConvertPrimitiveType
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}
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func parseFieldSelectorExpr(astTypeSelectorExpr *ast.SelectorExpr, parser *Parser, propertyNewFunc propertyNewFunc) propertyName {
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if primitiveType, err := convertFromSpecificToPrimitive(astTypeSelectorExpr.Sel.Name); err == nil {
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return propertyNewFunc(primitiveType, "")
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}
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if pkgName, ok := astTypeSelectorExpr.X.(*ast.Ident); ok {
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if typeDefinitions, ok := parser.TypeDefinitions[pkgName.Name][astTypeSelectorExpr.Sel.Name]; ok {
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if expr, ok := typeDefinitions.Type.(*ast.SelectorExpr); ok {
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if primitiveType, err := convertFromSpecificToPrimitive(expr.Sel.Name); err == nil {
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return propertyNewFunc(primitiveType, "")
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}
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}
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parser.ParseDefinition(pkgName.Name, astTypeSelectorExpr.Sel.Name, typeDefinitions)
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return propertyNewFunc(astTypeSelectorExpr.Sel.Name, pkgName.Name)
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}
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if actualPrimitiveType, isCustomType := parser.CustomPrimitiveTypes[astTypeSelectorExpr.Sel.Name]; isCustomType {
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return propertyName{SchemaType: actualPrimitiveType, ArrayType: actualPrimitiveType}
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}
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}
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return propertyName{SchemaType: "string", ArrayType: "string"}
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}
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// getPropertyName returns the string value for the given field if it exists
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// allowedValues: array, boolean, integer, null, number, object, string
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func getPropertyName(expr ast.Expr, parser *Parser) (propertyName, error) {
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if astTypeSelectorExpr, ok := expr.(*ast.SelectorExpr); ok {
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return parseFieldSelectorExpr(astTypeSelectorExpr, parser, newProperty), nil
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}
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// check if it is a custom type
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typeName := fmt.Sprintf("%v", expr)
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if actualPrimitiveType, isCustomType := parser.CustomPrimitiveTypes[typeName]; isCustomType {
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return propertyName{SchemaType: actualPrimitiveType, ArrayType: actualPrimitiveType}, nil
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}
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if astTypeIdent, ok := expr.(*ast.Ident); ok {
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name := astTypeIdent.Name
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schemeType := TransToValidSchemeType(name)
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return propertyName{SchemaType: schemeType, ArrayType: schemeType}, nil
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}
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if ptr, ok := expr.(*ast.StarExpr); ok {
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return getPropertyName(ptr.X, parser)
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}
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if astTypeArray, ok := expr.(*ast.ArrayType); ok { // if array
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if _, ok := astTypeArray.Elt.(*ast.StructType); ok {
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return propertyName{SchemaType: "array", ArrayType: "object"}, nil
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}
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return getArrayPropertyName(astTypeArray, parser), nil
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}
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if _, ok := expr.(*ast.MapType); ok { // if map
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return propertyName{SchemaType: "object", ArrayType: "object"}, nil
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}
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if _, ok := expr.(*ast.StructType); ok { // if struct
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return propertyName{SchemaType: "object", ArrayType: "object"}, nil
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}
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if _, ok := expr.(*ast.InterfaceType); ok { // if interface{}
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return propertyName{SchemaType: "object", ArrayType: "object"}, nil
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}
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return propertyName{}, errors.New("not supported" + fmt.Sprint(expr))
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}
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func getArrayPropertyName(astTypeArray *ast.ArrayType, parser *Parser) propertyName {
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if astTypeArrayExpr, ok := astTypeArray.Elt.(*ast.SelectorExpr); ok {
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return parseFieldSelectorExpr(astTypeArrayExpr, parser, newArrayProperty)
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}
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if astTypeArrayExpr, ok := astTypeArray.Elt.(*ast.StarExpr); ok {
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if astTypeArraySel, ok := astTypeArrayExpr.X.(*ast.SelectorExpr); ok {
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return parseFieldSelectorExpr(astTypeArraySel, parser, newArrayProperty)
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}
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if astTypeArrayIdent, ok := astTypeArrayExpr.X.(*ast.Ident); ok {
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name := TransToValidSchemeType(astTypeArrayIdent.Name)
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return propertyName{SchemaType: "array", ArrayType: name}
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}
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}
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itemTypeName := TransToValidSchemeType(fmt.Sprintf("%s", astTypeArray.Elt))
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if actualPrimitiveType, isCustomType := parser.CustomPrimitiveTypes[itemTypeName]; isCustomType {
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itemTypeName = actualPrimitiveType
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}
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return propertyName{SchemaType: "array", ArrayType: itemTypeName}
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}
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