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package resource
import (
"errors"
"strings"
)
// Dependency is implemented by anything that can be depended upon. It returns
// the flattened list of individual resource IDs, so that depending on a Multi
// expands into a dependency on each of its members individually.
type Dependency interface {
Dependencies() []string
}
// Multi is a collection of resources that satisfies the api.Resource interface.
type Multi []Resource
func (m Multi) String() string {
strs := make([]string, 0, len(m))
for _, res := range m {
strs = append(strs, res.String())
}
return strings.Join(strs, ", ")
}
func (m Multi) ID() string {
ids := make([]string, 0, len(m))
for _, res := range m {
ids = append(ids, res.String())
}
return strings.Join(ids, "+")
}
// Dependencies flattens the Multi into the IDs of each of its members, so a
// dependency on a Multi becomes an individual dependency on every resource it
// contains.
func (m Multi) Dependencies() []string {
ids := make([]string, 0, len(m))
for _, res := range m {
ids = append(ids, res.Dependencies()...)
}
return ids
}
func (m Multi) Apply() error {
var errs []error
for _, res := range m {
errs = append(errs, res.Apply())
}
return errors.Join(errs...)
}
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