✨ feat: Initial commit

internal/github/github.go

@@ -0,0 +1,132 @@
+package github
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+const apiBase = "https://api.github.com"
+
+type Client struct {
+	token string
+	http  *http.Client
+}
+
+func NewClient(token string) *Client {
+	return &Client{
+		token: token,
+		http:  &http.Client{Timeout: 30 * time.Second},
+	}
+}
+
+type Repo struct {
+	FullName string `json:"full_name"`
+	CloneURL string `json:"clone_url"`
+	Private  bool   `json:"private"`
+}
+
+type Event struct {
+	Type      string `json:"type"`
+	CreatedAt string `json:"created_at"`
+	Actor     struct {
+		Login string `json:"login"`
+	} `json:"actor"`
+	Repo struct {
+		Name string `json:"name"`
+	} `json:"repo"`
+	Payload struct {
+		Ref    string `json:"ref"`
+		Head   string `json:"head"`
+		Before string `json:"before"`
+	} `json:"payload"`
+}
+
+func (c *Client) CurrentUserLogin() (string, error) {
+	var user struct {
+		Login string `json:"login"`
+	}
+	if _, err := c.get(apiBase+"/user", &user); err != nil {
+		return "", err
+	}
+	return user.Login, nil
+}
+
+func (c *Client) PublicEvents(login string) ([]Event, error) {
+	var all []Event
+	url := apiBase + "/users/" + login + "/events/public?per_page=100"
+	for url != "" {
+		var page []Event
+		next, err := c.get(url, &page)
+		if err != nil {
+			return nil, err
+		}
+		all = append(all, page...)
+		url = next
+	}
+	return all, nil
+}
+
+func (c *Client) ListAccessibleRepos() ([]Repo, error) {
+	var all []Repo
+	url := apiBase + "/user/repos?affiliation=owner,collaborator,organization_member&per_page=100"
+	for url != "" {
+		var page []Repo
+		next, err := c.get(url, &page)
+		if err != nil {
+			return nil, err
+		}
+		all = append(all, page...)
+		url = next
+	}
+	return all, nil
+}
+
+func (c *Client) get(url string, out any) (string, error) {
+	req, err := http.NewRequest(http.MethodGet, url, nil)
+	if err != nil {
+		return "", err
+	}
+	req.Header.Set("Authorization", "Bearer "+c.token)
+	req.Header.Set("Accept", "application/vnd.github+json")
+	req.Header.Set("X-GitHub-Api-Version", "2022-11-28")
+
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode == http.StatusForbidden && resp.Header.Get("X-RateLimit-Remaining") == "0" {
+		reset := resp.Header.Get("X-RateLimit-Reset")
+		return "", fmt.Errorf("rate limited by GitHub API, resets at unix time %s", reset)
+	}
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("GitHub API request to %s failed: %s", url, resp.Status)
+	}
+
+	if err := json.NewDecoder(resp.Body).Decode(out); err != nil {
+		return "", fmt.Errorf("decoding response from %s: %w", url, err)
+	}
+
+	return parseNextLink(resp.Header.Get("Link")), nil
+}
+
+func parseNextLink(header string) string {
+	if header == "" {
+		return ""
+	}
+	for _, part := range strings.Split(header, ",") {
+		segments := strings.Split(part, ";")
+		if len(segments) < 2 {
+			continue
+		}
+		if strings.TrimSpace(segments[1]) == `rel="next"` {
+			url := strings.TrimSpace(segments[0])
+			return strings.Trim(url, "<>")
+		}
+	}
+	return ""
+}