feat: add gitea skill discovery

internal/gitea/client.go

@@ -0,0 +1,177 @@
+package gitea
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"sgg-ai-skill-manager/internal/domain"
+)
+
+const (
+	AuthPassword = "password"
+	AuthToken    = "token"
+)
+
+type Auth struct {
+	Type     string
+	Username string
+	Secret   string
+}
+
+type Client struct {
+	baseURL    string
+	auth       Auth
+	httpClient *http.Client
+}
+
+type apiRepo struct {
+	Name          string `json:"name"`
+	FullName      string `json:"full_name"`
+	Description   string `json:"description"`
+	CloneURL      string `json:"clone_url"`
+	SSHURL        string `json:"ssh_url"`
+	DefaultBranch string `json:"default_branch"`
+	UpdatedAt     string `json:"updated_at"`
+}
+
+type apiUser struct {
+	UserName string `json:"username"`
+}
+
+func NewClient(baseURL string, auth Auth) *Client {
+	return &Client{
+		baseURL: strings.TrimRight(baseURL, "/"),
+		auth: auth,
+		httpClient: &http.Client{Timeout: 20 * time.Second},
+	}
+}
+
+func (c *Client) ListOrgSkills(ctx context.Context, org string) ([]domain.RemoteSkill, error) {
+	var skills []domain.RemoteSkill
+	for page := 1; ; page++ {
+		var repos []apiRepo
+		endpoint := fmt.Sprintf("/api/v1/orgs/%s/repos?page=%d&limit=50", url.PathEscape(org), page)
+		if err := c.getJSON(ctx, endpoint, &repos); err != nil {
+			return nil, err
+		}
+		if len(repos) == 0 {
+			break
+		}
+		for _, repo := range repos {
+			hasSkill, err := c.HasRootSkill(ctx, org, repo.Name, repo.DefaultBranch)
+			if err != nil {
+				skills = append(skills, domain.RemoteSkill{
+					Name:     repo.Name,
+					FullName: repo.FullName,
+					Status:   "check_failed",
+					Error:    err.Error(),
+				})
+				continue
+			}
+			if !hasSkill {
+				continue
+			}
+			skills = append(skills, domain.RemoteSkill{
+				Name:          repo.Name,
+				FullName:      repo.FullName,
+				Description:   repo.Description,
+				CloneURL:      repo.CloneURL,
+				SSHURL:        repo.SSHURL,
+				DefaultBranch: repo.DefaultBranch,
+				UpdatedAt:     repo.UpdatedAt,
+				Status:        "remote",
+			})
+		}
+		if len(repos) < 50 {
+			break
+		}
+	}
+	return skills, nil
+}
+
+func (c *Client) HasRootSkill(ctx context.Context, org, repo, ref string) (bool, error) {
+	endpoint := fmt.Sprintf(
+		"/api/v1/repos/%s/%s/contents/SKILL.md",
+		url.PathEscape(org),
+		url.PathEscape(repo),
+	)
+	if ref != "" {
+		endpoint += "?ref=" + url.QueryEscape(ref)
+	}
+	req, err := c.newRequest(ctx, http.MethodGet, endpoint)
+	if err != nil {
+		return false, err
+	}
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return false, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode == http.StatusNotFound {
+		return false, nil
+	}
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+		return true, nil
+	}
+	return false, fmt.Errorf("check SKILL.md failed: %s", resp.Status)
+}
+
+func (c *Client) TestConnection(ctx context.Context, org string) (domain.TestConnectionResult, error) {
+	var user apiUser
+	if err := c.getJSON(ctx, "/api/v1/user", &user); err != nil {
+		return domain.TestConnectionResult{}, err
+	}
+	req, err := c.newRequest(ctx, http.MethodGet, "/api/v1/orgs/"+url.PathEscape(org))
+	if err != nil {
+		return domain.TestConnectionResult{}, err
+	}
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return domain.TestConnectionResult{}, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return domain.TestConnectionResult{}, fmt.Errorf("org access failed: %s", resp.Status)
+	}
+	return domain.TestConnectionResult{
+		OK:       true,
+		Message:  "connected",
+		Username: user.UserName,
+		Org:      org,
+	}, nil
+}
+
+func (c *Client) getJSON(ctx context.Context, endpoint string, target any) error {
+	req, err := c.newRequest(ctx, http.MethodGet, endpoint)
+	if err != nil {
+		return err
+	}
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("gitea request failed: %s", resp.Status)
+	}
+	return json.NewDecoder(resp.Body).Decode(target)
+}
+
+func (c *Client) newRequest(ctx context.Context, method, endpoint string) (*http.Request, error) {
+	req, err := http.NewRequestWithContext(ctx, method, c.baseURL+endpoint, nil)
+	if err != nil {
+		return nil, err
+	}
+	if c.auth.Type == AuthToken {
+		req.Header.Set("Authorization", "token "+c.auth.Secret)
+	} else if c.auth.Username != "" || c.auth.Secret != "" {
+		req.SetBasicAuth(c.auth.Username, c.auth.Secret)
+	}
+	req.Header.Set("Accept", "application/json")
+	return req, nil
+}