mirror of https://github.com/docker/cli.git
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
package command
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import (
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"encoding/json"
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"errors"
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"github.com/docker/cli/cli/context/store"
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)
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// DockerContext is a typed representation of what we put in Context metadata
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type DockerContext struct {
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Description string
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AdditionalFields map[string]interface{}
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}
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// MarshalJSON implements custom JSON marshalling
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func (dc DockerContext) MarshalJSON() ([]byte, error) {
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s := map[string]interface{}{}
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if dc.Description != "" {
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s["Description"] = dc.Description
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}
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if dc.AdditionalFields != nil {
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for k, v := range dc.AdditionalFields {
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s[k] = v
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}
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}
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return json.Marshal(s)
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}
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// UnmarshalJSON implements custom JSON marshalling
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func (dc *DockerContext) UnmarshalJSON(payload []byte) error {
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var data map[string]interface{}
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if err := json.Unmarshal(payload, &data); err != nil {
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return err
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}
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for k, v := range data {
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switch k {
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case "Description":
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dc.Description = v.(string)
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default:
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if dc.AdditionalFields == nil {
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dc.AdditionalFields = make(map[string]interface{})
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}
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dc.AdditionalFields[k] = v
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}
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}
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return nil
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}
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// GetDockerContext extracts metadata from stored context metadata
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func GetDockerContext(storeMetadata store.Metadata) (DockerContext, error) {
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if storeMetadata.Metadata == nil {
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// can happen if we save endpoints before assigning a context metadata
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// it is totally valid, and we should return a default initialized value
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return DockerContext{}, nil
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}
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res, ok := storeMetadata.Metadata.(DockerContext)
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if !ok {
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return DockerContext{}, errors.New("context metadata is not a valid DockerContext")
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}
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return res, nil
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}
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