92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package v2
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import (
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"encoding/json"
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"fmt"
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"io"
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"text/template"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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type TemplateContext struct {
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GVR schema.GroupVersionResource
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Document map[string]interface{}
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Recursive bool
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FieldPath []string
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}
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type generator struct {
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templates map[string]*template.Template
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}
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func NewGenerator() *generator {
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return &generator{
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templates: make(map[string]*template.Template),
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}
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}
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func (g *generator) AddTemplate(name string, contents string) error {
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compiled, err := template.
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New(name).
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Funcs(map[string]interface{}{
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"toJson": func(obj any) (string, error) {
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res, err := json.Marshal(obj)
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return string(res), err
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},
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}).
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Parse(contents)
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if err != nil {
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return err
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}
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g.templates[name] = compiled
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return nil
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}
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func (g *generator) Render(
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// Template to use for rendering
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templateName string,
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// Self-Contained OpenAPI Document Containing all schemas used by $ref
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// Only OpenAPI V3 documents are supported
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document map[string]interface{},
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// Resource within OpenAPI document for which to render explain schema
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gvr schema.GroupVersionResource,
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// Field path of child of resource to focus output onto
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fieldSelector []string,
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// Boolean indicating whether the fields should be rendered recursively/deeply
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recursive bool,
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// Output writer
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writer io.Writer,
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) error {
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compiledTemplate, ok := g.templates[templateName]
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if !ok {
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return fmt.Errorf("unrecognized format: %s", templateName)
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}
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err := compiledTemplate.Execute(writer, TemplateContext{
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Document: document,
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Recursive: recursive,
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FieldPath: fieldSelector,
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GVR: gvr,
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})
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return err
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}
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