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// Copyright 2015 The appc Authors
//
// 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 types
import (
"encoding/json"
"errors"
"fmt"
"path"
)
type App struct {
Exec Exec `json:"exec"`
EventHandlers []EventHandler `json:"eventHandlers,omitempty"`
User string `json:"user"`
Group string `json:"group"`
SupplementaryGIDs []int `json:"supplementaryGIDs,omitempty"`
WorkingDirectory string `json:"workingDirectory,omitempty"`
Environment Environment `json:"environment,omitempty"`
MountPoints []MountPoint `json:"mountPoints,omitempty"`
Ports []Port `json:"ports,omitempty"`
Isolators Isolators `json:"isolators,omitempty"`
UserAnnotations UserAnnotations `json:"userAnnotations,omitempty"`
UserLabels UserLabels `json:"userLabels,omitempty"`
}
// app is a model to facilitate extra validation during the
// unmarshalling of the App
type app App
func (a *App) UnmarshalJSON(data []byte) error {
ja := app(*a)
err := json.Unmarshal(data, &ja)
if err != nil {
return err
}
na := App(ja)
if err := na.assertValid(); err != nil {
return err
}
if na.Environment == nil {
na.Environment = make(Environment, 0)
}
*a = na
return nil
}
func (a App) MarshalJSON() ([]byte, error) {
if err := a.assertValid(); err != nil {
return nil, err
}
return json.Marshal(app(a))
}
func (a *App) assertValid() error {
if err := a.Exec.assertValid(); err != nil {
return err
}
if a.User == "" {
return errors.New(`user is required`)
}
if a.Group == "" {
return errors.New(`group is required`)
}
if !path.IsAbs(a.WorkingDirectory) && a.WorkingDirectory != "" {
return errors.New("workingDirectory must be an absolute path")
}
eh := make(map[string]bool)
for _, e := range a.EventHandlers {
name := e.Name
if eh[name] {
return fmt.Errorf("Only one eventHandler of name %q allowed", name)
}
eh[name] = true
}
if err := a.Environment.assertValid(); err != nil {
return err
}
if err := a.Isolators.assertValid(); err != nil {
return err
}
return nil
}
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