Allow fetching releases from multiple sources

internal/feed/releases.go

@@ -0,0 +1,69 @@
+package feed
+
+import (
+	"errors"
+	"fmt"
+	"log/slog"
+)
+
+type ReleaseSource string
+
+const (
+	ReleaseSourceGithub    ReleaseSource = "github"
+	ReleaseSourceGitlab    ReleaseSource = "gitlab"
+	ReleaseSourceDockerHub ReleaseSource = "dockerhub"
+)
+
+type ReleaseRequest struct {
+	Source     ReleaseSource
+	Repository string
+	Token      *string
+}
+
+func FetchLatestReleases(requests []*ReleaseRequest) (AppReleases, error) {
+	job := newJob(fetchLatestReleaseTask, requests).withWorkers(20)
+	results, errs, err := workerPoolDo(job)
+
+	if err != nil {
+		return nil, err
+	}
+
+	var failed int
+
+	releases := make(AppReleases, 0, len(requests))
+
+	for i := range results {
+		if errs[i] != nil {
+			failed++
+			slog.Error("Failed to fetch release", "source", requests[i].Source, "repository", requests[i].Repository, "error", errs[i])
+			continue
+		}
+
+		releases = append(releases, *results[i])
+	}
+
+	if failed == len(requests) {
+		return nil, ErrNoContent
+	}
+
+	releases.SortByNewest()
+
+	if failed > 0 {
+		return releases, fmt.Errorf("%w: could not get %d releases", ErrPartialContent, failed)
+	}
+
+	return releases, nil
+}
+
+func fetchLatestReleaseTask(request *ReleaseRequest) (*AppRelease, error) {
+	switch request.Source {
+	case ReleaseSourceGithub:
+		return fetchLatestGithubRelease(request)
+	case ReleaseSourceGitlab:
+		return fetchLatestGitLabRelease(request)
+	case ReleaseSourceDockerHub:
+		return fetchLatestDockerHubRelease(request)
+	}
+
+	return nil, errors.New("unsupported source")
+}