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package client
import (
"encoding/json"
"fmt"
"net/url"
"strings"
cerrdefs "github.com/containerd/errdefs"
"github.com/docker/docker/api/types/filters"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
)
type emptyIDError string
func (e emptyIDError) InvalidParameter() {}
func (e emptyIDError) Error() string {
return "invalid " + string(e) + " name or ID: value is empty"
}
// trimID trims the given object-ID / name, returning an error if it's empty.
func trimID(objType, id string) (string, error) {
id = strings.TrimSpace(id)
if id == "" {
return "", emptyIDError(objType)
}
return id, nil
}
// getFiltersQuery returns a url query with "filters" query term, based on the
// filters provided.
func getFiltersQuery(f filters.Args) (url.Values, error) {
query := url.Values{}
if f.Len() > 0 {
filterJSON, err := filters.ToJSON(f)
if err != nil {
return query, err
}
query.Set("filters", filterJSON)
}
return query, nil
}
// encodePlatforms marshals the given platform(s) to JSON format, to
// be used for query-parameters for filtering / selecting platforms.
func encodePlatforms(platform ...ocispec.Platform) ([]string, error) {
if len(platform) == 0 {
return []string{}, nil
}
if len(platform) == 1 {
p, err := encodePlatform(&platform[0])
if err != nil {
return nil, err
}
return []string{p}, nil
}
seen := make(map[string]struct{}, len(platform))
out := make([]string, 0, len(platform))
for i := range platform {
p, err := encodePlatform(&platform[i])
if err != nil {
return nil, err
}
if _, ok := seen[p]; !ok {
out = append(out, p)
seen[p] = struct{}{}
}
}
return out, nil
}
// encodePlatform marshals the given platform to JSON format, to
// be used for query-parameters for filtering / selecting platforms. It
// is used as a helper for encodePlatforms,
func encodePlatform(platform *ocispec.Platform) (string, error) {
p, err := json.Marshal(platform)
if err != nil {
return "", fmt.Errorf("%w: invalid platform: %v", cerrdefs.ErrInvalidArgument, err)
}
return string(p), nil
}
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