feature/gitea-integration (#10)

Co-authored-by: kjuulh <contact@kjuulh.io>
Reviewed-on: kjuulh/kraken#10

internal/gitproviders/gitea.go

@@ -0,0 +1,133 @@
+package gitproviders
+
+import (
+	"context"
+	"fmt"
+	"sync"
+
+	"code.gitea.io/sdk/gitea"
+	"go.uber.org/zap"
+)
+
+type Gitea struct {
+	logger       *zap.Logger
+	giteamu      sync.Mutex
+	giteaClients map[string]*gitea.Client
+}
+
+func NewGitea(logger *zap.Logger) *Gitea {
+	return &Gitea{
+		logger:       logger,
+		giteamu:      sync.Mutex{},
+		giteaClients: make(map[string]*gitea.Client, 0),
+	}
+}
+
+func (g *Gitea) ListRepositoriesForOrganization(
+	ctx context.Context,
+	server string,
+	organization string,
+) ([]string, error) {
+	client, err := g.getOrCreateClient(ctx, server)
+	if err != nil {
+		return nil, err
+	}
+
+	g.logger.Debug("Listing repos for gitea", zap.String("server", server))
+	repos, resp, err := client.ListOrgRepos(organization, gitea.ListOrgReposOptions{
+		ListOptions: gitea.ListOptions{
+			Page:     0,
+			PageSize: 20,
+		},
+	})
+	if err != nil {
+		return nil, fmt.Errorf("could not list repos: %w", err)
+	}
+
+	if resp.StatusCode >= 300 {
+		return nil, fmt.Errorf("gitea responded with a non 200 status code (gitea response: %s)", resp.Status)
+	}
+
+	repoUrls := make([]string, len(repos))
+	for i, repo := range repos {
+		repoUrls[i] = repo.SSHURL
+	}
+
+	return repoUrls, err
+}
+
+func (g *Gitea) CreatePr(
+	ctx context.Context,
+	server string,
+	organization string,
+	repository string,
+	head string,
+	base string,
+	actionName string,
+) error {
+	client, err := g.getOrCreateClient(ctx, server)
+	if err != nil {
+		return err
+	}
+
+	prs, _, err := client.ListRepoPullRequests(organization, repository, gitea.ListPullRequestsOptions{
+		ListOptions: gitea.ListOptions{
+			Page:     0,
+			PageSize: 30,
+		},
+		State:     gitea.StateOpen,
+		Sort:      "recentupdate",
+		Milestone: 0,
+	})
+	if err != nil {
+		return fmt.Errorf(
+			"could not list repos, needed because we need to check for conflicts. Original error: %w",
+			err,
+		)
+	}
+	for _, pr := range prs {
+		if pr.Head.Name == head {
+			g.logger.Info(
+				"returning early from creating pull-request, as it already exists.",
+				zap.String("repository", repository),
+				zap.String("pull-request", pr.URL),
+			)
+			return nil
+		}
+	}
+
+	pr, _, err := client.CreatePullRequest(organization, repository, gitea.CreatePullRequestOption{
+		Head:  head,
+		Base:  base,
+		Title: actionName,
+	})
+	if err != nil {
+		return err
+	}
+
+	g.logger.Debug(
+		"Created pr",
+		zap.String("repository", repository),
+		zap.String("branch", head),
+		zap.String("pull-request", pr.URL),
+	)
+
+	return nil
+}
+
+func (g *Gitea) getOrCreateClient(ctx context.Context, server string) (*gitea.Client, error) {
+	g.giteamu.Lock()
+	defer g.giteamu.Unlock()
+	client, ok := g.giteaClients[server]
+	if !ok || client == nil {
+		c, err := gitea.NewClient(server)
+		c.SetBasicAuth("kjuulh", "c0bd801cc9a7f2ed559ea45d603afc92f5443f19")
+		if err != nil {
+			return nil, err
+		}
+		g.giteaClients[server] = c
+		return c, nil
+	}
+
+	return client, nil
+}