Use vendored go-swagger (#8087)

* Use vendored go-swagger

* vendor go-swagger

* revert un wanteed change

* remove un-needed GO111MODULE

* Update Makefile

Co-Authored-By: techknowlogick <matti@mdranta.net>

vendor/github.com/go-openapi/analysis/schema.go

@@ -0,0 +1,234 @@
+package analysis
+
+import (
+	"fmt"
+
+	"github.com/go-openapi/spec"
+	"github.com/go-openapi/strfmt"
+)
+
+// SchemaOpts configures the schema analyzer
+type SchemaOpts struct {
+	Schema   *spec.Schema
+	Root     interface{}
+	BasePath string
+	_        struct{}
+}
+
+// Schema analysis, will classify the schema according to known
+// patterns.
+func Schema(opts SchemaOpts) (*AnalyzedSchema, error) {
+	if opts.Schema == nil {
+		return nil, fmt.Errorf("no schema to analyze")
+	}
+
+	a := &AnalyzedSchema{
+		schema:   opts.Schema,
+		root:     opts.Root,
+		basePath: opts.BasePath,
+	}
+
+	a.initializeFlags()
+	a.inferKnownType()
+	a.inferEnum()
+	a.inferBaseType()
+
+	if err := a.inferMap(); err != nil {
+		return nil, err
+	}
+	if err := a.inferArray(); err != nil {
+		return nil, err
+	}
+
+	a.inferTuple()
+
+	if err := a.inferFromRef(); err != nil {
+		return nil, err
+	}
+
+	a.inferSimpleSchema()
+	return a, nil
+}
+
+// AnalyzedSchema indicates what the schema represents
+type AnalyzedSchema struct {
+	schema   *spec.Schema
+	root     interface{}
+	basePath string
+
+	hasProps           bool
+	hasAllOf           bool
+	hasItems           bool
+	hasAdditionalProps bool
+	hasAdditionalItems bool
+	hasRef             bool
+
+	IsKnownType      bool
+	IsSimpleSchema   bool
+	IsArray          bool
+	IsSimpleArray    bool
+	IsMap            bool
+	IsSimpleMap      bool
+	IsExtendedObject bool
+	IsTuple          bool
+	IsTupleWithExtra bool
+	IsBaseType       bool
+	IsEnum           bool
+}
+
+// Inherits copies value fields from other onto this schema
+func (a *AnalyzedSchema) inherits(other *AnalyzedSchema) {
+	if other == nil {
+		return
+	}
+	a.hasProps = other.hasProps
+	a.hasAllOf = other.hasAllOf
+	a.hasItems = other.hasItems
+	a.hasAdditionalItems = other.hasAdditionalItems
+	a.hasAdditionalProps = other.hasAdditionalProps
+	a.hasRef = other.hasRef
+
+	a.IsKnownType = other.IsKnownType
+	a.IsSimpleSchema = other.IsSimpleSchema
+	a.IsArray = other.IsArray
+	a.IsSimpleArray = other.IsSimpleArray
+	a.IsMap = other.IsMap
+	a.IsSimpleMap = other.IsSimpleMap
+	a.IsExtendedObject = other.IsExtendedObject
+	a.IsTuple = other.IsTuple
+	a.IsTupleWithExtra = other.IsTupleWithExtra
+	a.IsBaseType = other.IsBaseType
+	a.IsEnum = other.IsEnum
+}
+
+func (a *AnalyzedSchema) inferFromRef() error {
+	if a.hasRef {
+		sch := new(spec.Schema)
+		sch.Ref = a.schema.Ref
+		err := spec.ExpandSchema(sch, a.root, nil)
+		if err != nil {
+			return err
+		}
+		rsch, err := Schema(SchemaOpts{
+			Schema:   sch,
+			Root:     a.root,
+			BasePath: a.basePath,
+		})
+		if err != nil {
+			// NOTE(fredbi): currently the only cause for errors is
+			// unresolved ref. Since spec.ExpandSchema() expands the
+			// schema recursively, there is no chance to get there,
+			// until we add more causes for error in this schema analysis.
+			return err
+		}
+		a.inherits(rsch)
+	}
+	return nil
+}
+
+func (a *AnalyzedSchema) inferSimpleSchema() {
+	a.IsSimpleSchema = a.IsKnownType || a.IsSimpleArray || a.IsSimpleMap
+}
+
+func (a *AnalyzedSchema) inferKnownType() {
+	tpe := a.schema.Type
+	format := a.schema.Format
+	a.IsKnownType = tpe.Contains("boolean") ||
+		tpe.Contains("integer") ||
+		tpe.Contains("number") ||
+		tpe.Contains("string") ||
+		(format != "" && strfmt.Default.ContainsName(format)) ||
+		(a.isObjectType() && !a.hasProps && !a.hasAllOf && !a.hasAdditionalProps && !a.hasAdditionalItems)
+}
+
+func (a *AnalyzedSchema) inferMap() error {
+	if a.isObjectType() {
+		hasExtra := a.hasProps || a.hasAllOf
+		a.IsMap = a.hasAdditionalProps && !hasExtra
+		a.IsExtendedObject = a.hasAdditionalProps && hasExtra
+		if a.IsMap {
+			if a.schema.AdditionalProperties.Schema != nil {
+				msch, err := Schema(SchemaOpts{
+					Schema:   a.schema.AdditionalProperties.Schema,
+					Root:     a.root,
+					BasePath: a.basePath,
+				})
+				if err != nil {
+					return err
+				}
+				a.IsSimpleMap = msch.IsSimpleSchema
+			} else if a.schema.AdditionalProperties.Allows {
+				a.IsSimpleMap = true
+			}
+		}
+	}
+	return nil
+}
+
+func (a *AnalyzedSchema) inferArray() error {
+	// an array has Items defined as an object schema, otherwise we qualify this JSON array as a tuple
+	// (yes, even if the Items array contains only one element).
+	// arrays in JSON schema may be unrestricted (i.e no Items specified).
+	// Note that arrays in Swagger MUST have Items. Nonetheless, we analyze unrestricted arrays.
+	//
+	// NOTE: the spec package misses the distinction between:
+	// items: [] and items: {}, so we consider both arrays here.
+	a.IsArray = a.isArrayType() && (a.schema.Items == nil || a.schema.Items.Schemas == nil)
+	if a.IsArray && a.hasItems {
+		if a.schema.Items.Schema != nil {
+			itsch, err := Schema(SchemaOpts{
+				Schema:   a.schema.Items.Schema,
+				Root:     a.root,
+				BasePath: a.basePath,
+			})
+			if err != nil {
+				return err
+			}
+			a.IsSimpleArray = itsch.IsSimpleSchema
+		}
+	}
+	if a.IsArray && !a.hasItems {
+		a.IsSimpleArray = true
+	}
+	return nil
+}
+
+func (a *AnalyzedSchema) inferTuple() {
+	tuple := a.hasItems && a.schema.Items.Schemas != nil
+	a.IsTuple = tuple && !a.hasAdditionalItems
+	a.IsTupleWithExtra = tuple && a.hasAdditionalItems
+}
+
+func (a *AnalyzedSchema) inferBaseType() {
+	if a.isObjectType() {
+		a.IsBaseType = a.schema.Discriminator != ""
+	}
+}
+
+func (a *AnalyzedSchema) inferEnum() {
+	a.IsEnum = len(a.schema.Enum) > 0
+}
+
+func (a *AnalyzedSchema) initializeFlags() {
+	a.hasProps = len(a.schema.Properties) > 0
+	a.hasAllOf = len(a.schema.AllOf) > 0
+	a.hasRef = a.schema.Ref.String() != ""
+
+	a.hasItems = a.schema.Items != nil &&
+		(a.schema.Items.Schema != nil || len(a.schema.Items.Schemas) > 0)
+
+	a.hasAdditionalProps = a.schema.AdditionalProperties != nil &&
+		(a.schema.AdditionalProperties != nil || a.schema.AdditionalProperties.Allows)
+
+	a.hasAdditionalItems = a.schema.AdditionalItems != nil &&
+		(a.schema.AdditionalItems.Schema != nil || a.schema.AdditionalItems.Allows)
+
+}
+
+func (a *AnalyzedSchema) isObjectType() bool {
+	return !a.hasRef && (a.schema.Type == nil || a.schema.Type.Contains("") || a.schema.Type.Contains("object"))
+}
+
+func (a *AnalyzedSchema) isArrayType() bool {
+	return !a.hasRef && (a.schema.Type != nil && a.schema.Type.Contains("array"))
+}