feat: signed releases, release feed, notification (read-only)

internal/infrastructure/update/giteaReleaseFeed.go

@@ -0,0 +1,79 @@
+package update
+
+import (
+	domain "RenewCMS/internal/domain/update"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+)
+
+const (
+	releasesPath       = "/api/v1/repos/fsylvain/RenewCMS/releases"
+	feedRequestTimeout = 10 * time.Second
+	maxFeedBodyBytes   = 4 << 20
+)
+
+type GiteaReleaseFeed struct {
+	baseURL string
+	client  *http.Client
+}
+
+var _ domain.ReleaseFeed = &GiteaReleaseFeed{}
+
+type giteaRelease struct {
+	TagName     string    `json:"tag_name"`
+	HTMLURL     string    `json:"html_url"`
+	Body        string    `json:"body"`
+	Draft       bool      `json:"draft"`
+	PublishedAt time.Time `json:"published_at"`
+}
+
+func NewGiteaReleaseFeed(baseURL string) *GiteaReleaseFeed {
+	return &GiteaReleaseFeed{
+		baseURL: strings.TrimRight(baseURL, "/"),
+		client:  &http.Client{Timeout: feedRequestTimeout},
+	}
+}
+
+func (g *GiteaReleaseFeed) Latest() (domain.Release, error) {
+	releases, err := g.fetch()
+	if err != nil {
+		return domain.Release{}, err
+	}
+	return domain.Newest(releases)
+}
+
+func (g *GiteaReleaseFeed) fetch() ([]domain.Release, error) {
+	response, err := g.client.Get(g.baseURL + releasesPath)
+	if err != nil {
+		return nil, fmt.Errorf("%w: %v", domain.ErrFeedUnavailable, err)
+	}
+	defer response.Body.Close()
+	if response.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("%w: status %d", domain.ErrFeedUnavailable, response.StatusCode)
+	}
+	var raw []giteaRelease
+	if err := json.NewDecoder(io.LimitReader(response.Body, maxFeedBodyBytes)).Decode(&raw); err != nil {
+		return nil, fmt.Errorf("%w: %v", domain.ErrFeedUnavailable, err)
+	}
+	return toReleases(raw), nil
+}
+
+func toReleases(raw []giteaRelease) []domain.Release {
+	releases := make([]domain.Release, 0, len(raw))
+	for _, item := range raw {
+		if item.Draft {
+			continue
+		}
+		releases = append(releases, domain.Release{
+			Tag:         item.TagName,
+			URL:         item.HTMLURL,
+			PublishedAt: item.PublishedAt,
+			Notes:       domain.BuildNotes(item.TagName, item.PublishedAt, item.Body),
+		})
+	}
+	return releases
+}