versionsapi: new implementation

Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>

internal/versionsapi/imageinfo.go

@@ -0,0 +1,114 @@
+/*
+Copyright (c) Edgeless Systems GmbH
+
+SPDX-License-Identifier: AGPL-3.0-only
+*/
+
+package versionsapi
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"path"
+
+	"github.com/edgelesssys/constellation/v2/internal/constants"
+	"go.uber.org/multierr"
+	"golang.org/x/mod/semver"
+)
+
+// ImageInfo contains information about the OS images for a specific version.
+type ImageInfo struct {
+	// Ref is the reference name of the image.
+	Ref string `json:"ref,omitempty"`
+	// Stream is the stream name of the image.
+	Stream string `json:"stream,omitempty"`
+	// Version is the version of the image.
+	Version string `json:"version,omitempty"`
+	// AWS is a map of AWS regions to AMI IDs.
+	AWS map[string]string `json:"aws,omitempty"`
+	// Azure is a map of image types to Azure image IDs.
+	Azure map[string]string `json:"azure,omitempty"`
+	// GCP is a map of image types to GCP image IDs.
+	GCP map[string]string `json:"gcp,omitempty"`
+	// QEMU is a map of image types to QEMU image URLs.
+	QEMU map[string]string `json:"qemu,omitempty"`
+}
+
+// JSONPath returns the S3 JSON path for this object.
+func (i ImageInfo) JSONPath() string {
+	return path.Join(
+		constants.CDNAPIPrefix,
+		"ref", i.Ref,
+		"stream", i.Stream,
+		"image", i.Version,
+		"info.json",
+	)
+}
+
+// URL returns the URL to the JSON file for this object.
+func (i ImageInfo) URL() (string, error) {
+	url, err := url.Parse(constants.CDNRepositoryURL)
+	if err != nil {
+		return "", fmt.Errorf("parsing CDN URL: %w", err)
+	}
+	url.Path = i.JSONPath()
+	return url.String(), nil
+}
+
+// ValidateRequest validates the request parameters of the list.
+// The provider specific maps must be empty.
+func (i ImageInfo) ValidateRequest() error {
+	var retErr error
+	if err := ValidateRef(i.Ref); err != nil {
+		retErr = multierr.Append(retErr, err)
+	}
+	if err := ValidateStream(i.Ref, i.Stream); err != nil {
+		retErr = multierr.Append(retErr, err)
+	}
+	if !semver.IsValid(i.Version) {
+		retErr = multierr.Append(retErr, fmt.Errorf("version %q is not a valid semver", i.Version))
+	}
+	if len(i.AWS) != 0 {
+		retErr = multierr.Append(retErr, errors.New("AWS map must be empty for request"))
+	}
+	if len(i.Azure) != 0 {
+		retErr = multierr.Append(retErr, errors.New("Azure map must be empty for request"))
+	}
+	if len(i.GCP) != 0 {
+		retErr = multierr.Append(retErr, errors.New("GCP map must be empty for request"))
+	}
+	if len(i.QEMU) != 0 {
+		retErr = multierr.Append(retErr, errors.New("QEMU map must be empty for request"))
+	}
+
+	return retErr
+}
+
+// Validate checks if the image info is valid.
+func (i ImageInfo) Validate() error {
+	var retErr error
+	if err := ValidateRef(i.Ref); err != nil {
+		retErr = multierr.Append(retErr, err)
+	}
+	if err := ValidateStream(i.Ref, i.Stream); err != nil {
+		retErr = multierr.Append(retErr, err)
+	}
+	if !semver.IsValid(i.Version) {
+		retErr = multierr.Append(retErr, fmt.Errorf("version %q is not a valid semver", i.Version))
+	}
+	if len(i.AWS) == 0 {
+		retErr = multierr.Append(retErr, errors.New("AWS map must not be empty"))
+	}
+	if len(i.Azure) == 0 {
+		retErr = multierr.Append(retErr, errors.New("Azure map must not be empty"))
+	}
+	if len(i.GCP) == 0 {
+		retErr = multierr.Append(retErr, errors.New("GCP map must not be empty"))
+	}
+	if len(i.QEMU) == 0 {
+		retErr = multierr.Append(retErr, errors.New("QEMU map must not be empty"))
+	}
+
+	return retErr
+}