feat: implement Gitea API client

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/gitea/client.go

@@ -0,0 +1,98 @@
+package gitea
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+type Client struct {
+	baseURL    *url.URL
+	httpClient *http.Client
+	token      string
+}
+
+func NewClient(serverURL, token string) (*Client, error) {
+	u, err := url.Parse(serverURL)
+	if err != nil {
+		return nil, fmt.Errorf("invalid server URL: %w", err)
+	}
+	return &Client{
+		baseURL: u,
+		httpClient: &http.Client{
+			Timeout: 30 * time.Second,
+		},
+		token: token,
+	}, nil
+}
+
+func (c *Client) do(path string) (*http.Response, error) {
+	apiURL := c.baseURL.JoinPath(path)
+	q := apiURL.Query()
+	q.Set("token", c.token)
+	apiURL.RawQuery = q.Encode()
+	resp, err := c.httpClient.Get(apiURL.String())
+	if err != nil {
+		return nil, fmt.Errorf("request failed: %w", err)
+	}
+	return resp, nil
+}
+
+func (c *Client) ValidateToken() (*GiteaUser, error) {
+	resp, err := c.do("/api/v1/user")
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(resp.Body)
+		return nil, fmt.Errorf("authentication failed: %s - %s", resp.Status, string(body))
+	}
+	var user GiteaUser
+	if err := json.NewDecoder(resp.Body).Decode(&user); err != nil {
+		return nil, fmt.Errorf("failed to decode response: %w", err)
+	}
+	return &user, nil
+}
+
+func (c *Client) SearchRepos(page, limit int) ([]GiteaRepo, error) {
+	path := fmt.Sprintf("/api/v1/repos/search?page=%d&limit=%d", page, limit)
+	resp, err := c.do(path)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(resp.Body)
+		return nil, fmt.Errorf("search failed: %s - %s", resp.Status, string(body))
+	}
+	var searchResp GiteaSearchResponse
+	if err := json.NewDecoder(resp.Body).Decode(&searchResp); err != nil {
+		return nil, fmt.Errorf("failed to decode response: %w", err)
+	}
+	return searchResp.Data, nil
+}
+
+func (c *Client) GetAllRepos() ([]GiteaRepo, error) {
+	var allRepos []GiteaRepo
+	page := 1
+	limit := 50
+	for {
+		repos, err := c.SearchRepos(page, limit)
+		if err != nil {
+			return nil, err
+		}
+		if len(repos) == 0 {
+			break
+		}
+		allRepos = append(allRepos, repos...)
+		if len(repos) < limit {
+			break
+		}
+		page++
+	}
+	return allRepos, nil
+}

internal/gitea/types.go

@@ -0,0 +1,25 @@
+package gitea
+
+type GiteaUser struct {
+	ID       int64  `json:"id"`
+	Login    string `json:"login"`
+	FullName string `json:"full_name"`
+	Email    string `json:"email"`
+}
+
+type GiteaRepo struct {
+	ID       int64      `json:"id"`
+	Name     string     `json:"name"`
+	FullName string     `json:"full_name"`
+	CloneURL string     `json:"clone_url"`
+	SSHURL   string     `json:"ssh_url"`
+	Private  bool       `json:"private"`
+	Size     int64      `json:"size"`
+	Updated  string     `json:"updated_at"`
+	Owner    *GiteaUser `json:"owner"`
+}
+
+type GiteaSearchResponse struct {
+	OK   bool        `json:"ok"`
+	Data []GiteaRepo `json:"data"`
+}