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forgejo/vendor/github.com/go-openapi/analysis/mixin.go

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// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package analysis
import (
"fmt"
"reflect"
"github.com/go-openapi/spec"
)
// Mixin modifies the primary swagger spec by adding the paths and
// definitions from the mixin specs. Top level parameters and
// responses from the mixins are also carried over. Operation id
// collisions are avoided by appending "Mixin<N>" but only if
// needed.
//
// The following parts of primary are subject to merge, filling empty details
// - Info
// - BasePath
// - Host
// - ExternalDocs
//
// Consider calling FixEmptyResponseDescriptions() on the modified primary
// if you read them from storage and they are valid to start with.
//
// Entries in "paths", "definitions", "parameters" and "responses" are
// added to the primary in the order of the given mixins. If the entry
// already exists in primary it is skipped with a warning message.
//
// The count of skipped entries (from collisions) is returned so any
// deviation from the number expected can flag a warning in your build
// scripts. Carefully review the collisions before accepting them;
// consider renaming things if possible.
//
// No key normalization takes place (paths, type defs,
// etc). Ensure they are canonical if your downstream tools do
// key normalization of any form.
//
// Merging schemes (http, https), and consumers/producers do not account for
// collisions.
func Mixin(primary *spec.Swagger, mixins ...*spec.Swagger) []string {
skipped := make([]string, 0, len(mixins))
opIds := getOpIds(primary)
initPrimary(primary)
for i, m := range mixins {
skipped = append(skipped, mergeSwaggerProps(primary, m)...)
skipped = append(skipped, mergeConsumes(primary, m)...)
skipped = append(skipped, mergeProduces(primary, m)...)
skipped = append(skipped, mergeTags(primary, m)...)
skipped = append(skipped, mergeSchemes(primary, m)...)
skipped = append(skipped, mergeSecurityDefinitions(primary, m)...)
skipped = append(skipped, mergeSecurityRequirements(primary, m)...)
skipped = append(skipped, mergeDefinitions(primary, m)...)
// merging paths requires a map of operationIDs to work with
skipped = append(skipped, mergePaths(primary, m, opIds, i)...)
skipped = append(skipped, mergeParameters(primary, m)...)
skipped = append(skipped, mergeResponses(primary, m)...)
}
return skipped
}
// getOpIds extracts all the paths.<path>.operationIds from the given
// spec and returns them as the keys in a map with 'true' values.
func getOpIds(s *spec.Swagger) map[string]bool {
rv := make(map[string]bool)
if s.Paths == nil {
return rv
}
for _, v := range s.Paths.Paths {
piops := pathItemOps(v)
for _, op := range piops {
rv[op.ID] = true
}
}
return rv
}
func pathItemOps(p spec.PathItem) []*spec.Operation {
var rv []*spec.Operation
rv = appendOp(rv, p.Get)
rv = appendOp(rv, p.Put)
rv = appendOp(rv, p.Post)
rv = appendOp(rv, p.Delete)
rv = appendOp(rv, p.Head)
rv = appendOp(rv, p.Patch)
return rv
}
func appendOp(ops []*spec.Operation, op *spec.Operation) []*spec.Operation {
if op == nil {
return ops
}
return append(ops, op)
}
func mergeSecurityDefinitions(primary *spec.Swagger, m *spec.Swagger) (skipped []string) {
for k, v := range m.SecurityDefinitions {
if _, exists := primary.SecurityDefinitions[k]; exists {
warn := fmt.Sprintf(
"SecurityDefinitions entry '%v' already exists in primary or higher priority mixin, skipping\n", k)
skipped = append(skipped, warn)
continue
}
primary.SecurityDefinitions[k] = v
}
return
}
func mergeSecurityRequirements(primary *spec.Swagger, m *spec.Swagger) (skipped []string) {
for _, v := range m.Security {
found := false
for _, vv := range primary.Security {
if reflect.DeepEqual(v, vv) {
found = true
break
}
}
if found {
warn := fmt.Sprintf(
"Security requirement: '%v' already exists in primary or higher priority mixin, skipping\n", v)
skipped = append(skipped, warn)
continue
}
primary.Security = append(primary.Security, v)
}
return
}
func mergeDefinitions(primary *spec.Swagger, m *spec.Swagger) (skipped []string) {
for k, v := range m.Definitions {
// assume name collisions represent IDENTICAL type. careful.
if _, exists := primary.Definitions[k]; exists {
warn := fmt.Sprintf(
"definitions entry '%v' already exists in primary or higher priority mixin, skipping\n", k)
skipped = append(skipped, warn)
continue
}
primary.Definitions[k] = v
}
return
}
func mergePaths(primary *spec.Swagger, m *spec.Swagger, opIds map[string]bool, mixIndex int) (skipped []string) {
if m.Paths != nil {
for k, v := range m.Paths.Paths {
if _, exists := primary.Paths.Paths[k]; exists {
warn := fmt.Sprintf(
"paths entry '%v' already exists in primary or higher priority mixin, skipping\n", k)
skipped = append(skipped, warn)
continue
}
// Swagger requires that operationIds be
// unique within a spec. If we find a
// collision we append "Mixin0" to the
// operatoinId we are adding, where 0 is mixin
// index. We assume that operationIds with
// all the proivded specs are already unique.
piops := pathItemOps(v)
for _, piop := range piops {
if opIds[piop.ID] {
piop.ID = fmt.Sprintf("%v%v%v", piop.ID, "Mixin", mixIndex)
}
opIds[piop.ID] = true
}
primary.Paths.Paths[k] = v
}
}
return
}
func mergeParameters(primary *spec.Swagger, m *spec.Swagger) (skipped []string) {
for k, v := range m.Parameters {
// could try to rename on conflict but would
// have to fix $refs in the mixin. Complain
// for now
if _, exists := primary.Parameters[k]; exists {
warn := fmt.Sprintf(
"top level parameters entry '%v' already exists in primary or higher priority mixin, skipping\n", k)
skipped = append(skipped, warn)
continue
}
primary.Parameters[k] = v
}
return
}
func mergeResponses(primary *spec.Swagger, m *spec.Swagger) (skipped []string) {
for k, v := range m.Responses {
// could try to rename on conflict but would
// have to fix $refs in the mixin. Complain
// for now
if _, exists := primary.Responses[k]; exists {
warn := fmt.Sprintf(
"top level responses entry '%v' already exists in primary or higher priority mixin, skipping\n", k)
skipped = append(skipped, warn)
continue
}
primary.Responses[k] = v
}
return skipped
}
func mergeConsumes(primary *spec.Swagger, m *spec.Swagger) []string {
for _, v := range m.Consumes {
found := false
for _, vv := range primary.Consumes {
if v == vv {
found = true
break
}
}
if found {
// no warning here: we just skip it
continue
}
primary.Consumes = append(primary.Consumes, v)
}
return []string{}
}
func mergeProduces(primary *spec.Swagger, m *spec.Swagger) []string {
for _, v := range m.Produces {
found := false
for _, vv := range primary.Produces {
if v == vv {
found = true
break
}
}
if found {
// no warning here: we just skip it
continue
}
primary.Produces = append(primary.Produces, v)
}
return []string{}
}
func mergeTags(primary *spec.Swagger, m *spec.Swagger) (skipped []string) {
for _, v := range m.Tags {
found := false
for _, vv := range primary.Tags {
if v.Name == vv.Name {
found = true
break
}
}
if found {
warn := fmt.Sprintf(
"top level tags entry with name '%v' already exists in primary or higher priority mixin, skipping\n", v.Name)
skipped = append(skipped, warn)
continue
}
primary.Tags = append(primary.Tags, v)
}
return
}
func mergeSchemes(primary *spec.Swagger, m *spec.Swagger) []string {
for _, v := range m.Schemes {
found := false
for _, vv := range primary.Schemes {
if v == vv {
found = true
break
}
}
if found {
// no warning here: we just skip it
continue
}
primary.Schemes = append(primary.Schemes, v)
}
return []string{}
}
func mergeSwaggerProps(primary *spec.Swagger, m *spec.Swagger) []string {
var skipped []string
primary.Extensions, skipped = mergeExtensions(primary.Extensions, m.Extensions)
// merging details in swagger top properties
if primary.Host == "" {
primary.Host = m.Host
}
if primary.BasePath == "" {
primary.BasePath = m.BasePath
}
if primary.Info == nil {
primary.Info = m.Info
} else if m.Info != nil {
var sk []string
primary.Info.Extensions, sk = mergeExtensions(primary.Info.Extensions, m.Info.Extensions)
skipped = append(skipped, sk...)
if primary.Info.Description == "" {
primary.Info.Description = m.Info.Description
}
if primary.Info.Title == "" {
primary.Info.Description = m.Info.Description
}
if primary.Info.TermsOfService == "" {
primary.Info.TermsOfService = m.Info.TermsOfService
}
if primary.Info.Version == "" {
primary.Info.Version = m.Info.Version
}
if primary.Info.Contact == nil {
primary.Info.Contact = m.Info.Contact
} else if m.Info.Contact != nil {
var csk []string
primary.Info.Contact.Extensions, csk = mergeExtensions(primary.Info.Contact.Extensions, m.Info.Contact.Extensions)
skipped = append(skipped, csk...)
if primary.Info.Contact.Name == "" {
primary.Info.Contact.Name = m.Info.Contact.Name
}
if primary.Info.Contact.URL == "" {
primary.Info.Contact.URL = m.Info.Contact.URL
}
if primary.Info.Contact.Email == "" {
primary.Info.Contact.Email = m.Info.Contact.Email
}
}
if primary.Info.License == nil {
primary.Info.License = m.Info.License
} else if m.Info.License != nil {
var lsk []string
primary.Info.License.Extensions, lsk = mergeExtensions(primary.Info.License.Extensions, m.Info.License.Extensions)
skipped = append(skipped, lsk...)
if primary.Info.License.Name == "" {
primary.Info.License.Name = m.Info.License.Name
}
if primary.Info.License.URL == "" {
primary.Info.License.URL = m.Info.License.URL
}
}
}
if primary.ExternalDocs == nil {
primary.ExternalDocs = m.ExternalDocs
} else if m.ExternalDocs != nil {
if primary.ExternalDocs.Description == "" {
primary.ExternalDocs.Description = m.ExternalDocs.Description
}
if primary.ExternalDocs.URL == "" {
primary.ExternalDocs.URL = m.ExternalDocs.URL
}
}
return skipped
}
func mergeExtensions(primary spec.Extensions, m spec.Extensions) (result spec.Extensions, skipped []string) {
if primary == nil {
result = m
return
}
if m == nil {
result = primary
return
}
result = primary
for k, v := range m {
if _, found := primary[k]; found {
skipped = append(skipped, k)
continue
}
primary[k] = v
}
return
}
func initPrimary(primary *spec.Swagger) {
if primary.SecurityDefinitions == nil {
primary.SecurityDefinitions = make(map[string]*spec.SecurityScheme)
}
if primary.Security == nil {
primary.Security = make([]map[string][]string, 0, 10)
}
if primary.Produces == nil {
primary.Produces = make([]string, 0, 10)
}
if primary.Consumes == nil {
primary.Consumes = make([]string, 0, 10)
}
if primary.Tags == nil {
primary.Tags = make([]spec.Tag, 0, 10)
}
if primary.Schemes == nil {
primary.Schemes = make([]string, 0, 10)
}
if primary.Paths == nil {
primary.Paths = &spec.Paths{Paths: make(map[string]spec.PathItem)}
}
if primary.Paths.Paths == nil {
primary.Paths.Paths = make(map[string]spec.PathItem)
}
if primary.Definitions == nil {
primary.Definitions = make(spec.Definitions)
}
if primary.Parameters == nil {
primary.Parameters = make(map[string]spec.Parameter)
}
if primary.Responses == nil {
primary.Responses = make(map[string]spec.Response)
}
}