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package github
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"regexp"
"strconv"
"strings"
"time"
"log"
"github.com/livereview/internal/aisanitize"
"github.com/livereview/internal/capture"
"github.com/livereview/internal/providers"
"github.com/livereview/pkg/models"
)
type GitHubProvider struct {
PAT string
}
func NewGitHubProvider(pat string) *GitHubProvider {
log.Printf("[DEBUG] NewGitHubProvider called with PAT length: %d", len(pat))
return &GitHubProvider{PAT: pat}
}
func (p *GitHubProvider) Name() string {
return "github"
}
func (p *GitHubProvider) Configure(config map[string]interface{}) error {
log.Printf("[DEBUG] GitHubProvider.Configure called with config keys: %v", getKeys(config))
if pat, ok := config["pat_token"].(string); ok {
log.Printf("[DEBUG] Setting PAT token, length: %d", len(pat))
p.PAT = pat
return nil
}
log.Printf("[DEBUG] pat_token not found in config")
return fmt.Errorf("pat_token missing in config")
}
func getKeys(m map[string]interface{}) []string {
keys := make([]string, 0, len(m))
for k := range m {
keys = append(keys, k)
}
return keys
}
func (p *GitHubProvider) PostComment(ctx context.Context, prID string, comment *models.ReviewComment) error {
log.Printf("[DEBUG] PostComment called with prID: '%s', FilePath: '%s', Line: %d", prID, comment.FilePath, comment.Line)
// prID format: owner/repo/number
parts := strings.Split(prID, "/")
if len(parts) != 3 {
return fmt.Errorf("invalid GitHub PR ID format: expected 'owner/repo/number', got '%s'", prID)
}
owner := parts[0]
repo := parts[1]
number := parts[2]
// If this is a line comment (has FilePath and Line), use the pull request review comments API
if comment.FilePath != "" && comment.Line > 0 {
return p.postLineComment(ctx, owner, repo, number, comment)
}
// Otherwise, post as a general PR comment (issue comment)
return p.postGeneralComment(ctx, owner, repo, number, comment)
}
// formatGitHubComment creates a consistently formatted comment for GitHub
// with severity information and suggestions properly formatted
func formatGitHubComment(comment *models.ReviewComment) string {
safeContent, contentReport := aisanitize.SanitizationPostflight(context.Background(), comment.Content)
if contentReport.PIIRedactError {
log.Printf("[WARN] GitHub comment sanitization reported internal error for content")
}
safeSuggestions := make([]string, 0, len(comment.Suggestions))
for _, suggestion := range comment.Suggestions {
safeSuggestion, suggestionReport := aisanitize.SanitizationPostflight(context.Background(), suggestion)
if suggestionReport.PIIRedactError {
log.Printf("[WARN] GitHub comment sanitization reported internal error for suggestion")
}
safeSuggestions = append(safeSuggestions, safeSuggestion)
}
// Start with the content
formattedComment := safeContent
// Add severity information at the beginning
if comment.Severity != "" {
formattedComment = fmt.Sprintf("**Severity: %s**\n\n%s", comment.Severity, formattedComment)
}
// Add suggestions section if we have any
if len(safeSuggestions) > 0 {
formattedComment += "\n\n**Suggestions:**\n"
for i, suggestion := range safeSuggestions {
formattedComment += fmt.Sprintf("%d. %s\n", i+1, suggestion)
}
}
return formattedComment
}
func (p *GitHubProvider) postGeneralComment(ctx context.Context, owner, repo, number string, comment *models.ReviewComment) error {
url := fmt.Sprintf("https://api.github.com/repos/%s/%s/issues/%s/comments", owner, repo, number)
payload := map[string]string{"body": formatGitHubComment(comment)}
data, _ := json.Marshal(payload)
req, _ := http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(data))
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
req.Header.Set("Content-Type", "application/json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 201 {
return fmt.Errorf("GitHub general comment failed: %s", resp.Status)
}
log.Printf("[DEBUG] Successfully posted general comment")
return nil
}
func (p *GitHubProvider) postLineComment(ctx context.Context, owner, repo, number string, comment *models.ReviewComment) error {
// First get the PR details to get the head commit SHA
prDetailsURL := fmt.Sprintf("https://api.github.com/repos/%s/%s/pulls/%s", owner, repo, number)
req, _ := http.NewRequestWithContext(ctx, "GET", prDetailsURL, nil)
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return fmt.Errorf("failed to get PR details for line comment: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return fmt.Errorf("GitHub PR details failed for line comment: %s", resp.Status)
}
var pr struct {
Head struct {
SHA string `json:"sha"`
} `json:"head"`
}
if err := json.NewDecoder(resp.Body).Decode(&pr); err != nil {
return fmt.Errorf("failed to decode PR details: %w", err)
}
// Now create the line comment using the pull request comments API
url := fmt.Sprintf("https://api.github.com/repos/%s/%s/pulls/%s/comments", owner, repo, number)
payload := map[string]interface{}{
"body": formatGitHubComment(comment),
"commit_id": pr.Head.SHA,
"path": comment.FilePath,
"line": comment.Line,
}
// Determine side based on IsDeletedLine field
if comment.IsDeletedLine {
payload["side"] = "LEFT" // Comment on the old version (deleted line)
} else {
payload["side"] = "RIGHT" // Comment on the new version (added line)
}
data, _ := json.Marshal(payload)
req, _ = http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(data))
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
req.Header.Set("Content-Type", "application/json")
resp, err = http.DefaultClient.Do(req)
if err != nil {
return fmt.Errorf("failed to post line comment: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusCreated {
body, _ := io.ReadAll(resp.Body)
if resp.StatusCode == http.StatusUnprocessableEntity {
log.Printf("[WARN] Skipping GitHub line comment due to 422 response. Payload path=%s line=%d, body=%s", comment.FilePath, comment.Line, string(body))
return nil
}
log.Printf("[DEBUG] Line comment failed. Status: %s, Response: %s", resp.Status, string(body))
return fmt.Errorf("GitHub line comment failed: %s", resp.Status)
}
log.Printf("[DEBUG] Successfully posted line comment on %s:%d", comment.FilePath, comment.Line)
return nil
}
func (p *GitHubProvider) PostComments(ctx context.Context, prID string, comments []*models.ReviewComment) error {
for _, comment := range comments {
err := p.PostComment(ctx, prID, comment)
if err != nil {
return err
}
}
return nil
}
func (p *GitHubProvider) GetMergeRequestDetails(ctx context.Context, mrURL string) (*providers.MergeRequestDetails, error) {
parsed, err := url.Parse(mrURL)
if err != nil {
return nil, fmt.Errorf("invalid GitHub PR URL: %w", err)
}
parts := strings.Split(parsed.Path, "/")
if len(parts) < 5 || parts[3] != "pull" {
return nil, fmt.Errorf("invalid GitHub PR URL: expected /owner/repo/pull/number")
}
owner := parts[1]
repo := parts[2]
number := parts[4]
apiURL := fmt.Sprintf("https://api.github.com/repos/%s/%s/pulls/%s", owner, repo, number)
log.Printf("[DEBUG] GitHubProvider: Try this curl command to debug:")
log.Printf("curl -H 'Authorization: token %s' -H 'Accept: application/vnd.github.v3+json' '%s'", p.PAT, apiURL)
req, _ := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("GitHub PR details failed: %s", resp.Status)
}
var pr struct {
ID int `json:"id"`
Number int `json:"number"`
Title string `json:"title"`
Body string `json:"body"`
State string `json:"state"`
User struct {
Login string `json:"login"`
Name string `json:"name"`
AvatarURL string `json:"avatar_url"`
} `json:"user"`
Head struct {
SHA string `json:"sha"`
Ref string `json:"ref"`
Repo struct {
FullName string `json:"full_name"`
} `json:"repo"`
} `json:"head"`
Base struct {
SHA string `json:"sha"`
Ref string `json:"ref"`
Repo struct {
FullName string `json:"full_name"`
} `json:"repo"`
} `json:"base"`
CreatedAt string `json:"created_at"`
HTMLURL string `json:"html_url"`
}
if err := json.NewDecoder(resp.Body).Decode(&pr); err != nil {
return nil, err
}
authorName := pr.User.Name
if authorName == "" {
authorName = pr.User.Login
}
details := &providers.MergeRequestDetails{
ID: fmt.Sprintf("%d", pr.Number),
Title: pr.Title,
Description: pr.Body,
Author: pr.User.Login,
AuthorName: authorName,
AuthorUsername: pr.User.Login,
AuthorAvatar: pr.User.AvatarURL,
CreatedAt: pr.CreatedAt,
URL: mrURL,
State: pr.State,
WebURL: pr.HTMLURL,
SourceBranch: pr.Head.Ref,
TargetBranch: pr.Base.Ref,
DiffRefs: providers.DiffRefs{
BaseSHA: pr.Base.SHA,
HeadSHA: pr.Head.SHA,
},
ProviderType: "github",
RepositoryURL: fmt.Sprintf("https://github.com/%s/%s", owner, repo),
}
if commits, commitsErr := p.fetchPullRequestCommits(ctx, owner, repo, number); commitsErr != nil {
log.Printf("[WARN] GitHubProvider: failed to fetch PR commits for %s/%s#%s: %v", owner, repo, number, commitsErr)
} else {
details.Commits = commits
}
if capture.Enabled() {
payload := map[string]interface{}{
"owner": owner,
"repo": repo,
"number": number,
"api_url": apiURL,
"details": details,
}
capture.WriteJSON("github-pr-details", payload)
}
return details, nil
}
// fetchPullRequestCommits returns every commit SHA on a PR, oldest first; paginates at 100/page, capped at 250 commits (GitHub's own limit for this endpoint regardless of pagination).
func (p *GitHubProvider) fetchPullRequestCommits(ctx context.Context, owner, repo, number string) ([]string, error) {
var shas []string
const perPage = 100
for page := 1; page <= 3; page++ {
apiURL := fmt.Sprintf("https://api.github.com/repos/%s/%s/pulls/%s/commits?per_page=%d&page=%d", owner, repo, number, perPage, page)
req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
if err != nil {
return nil, err
}
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
var commits []struct {
SHA string `json:"sha"`
}
decodeErr := json.NewDecoder(resp.Body).Decode(&commits)
statusCode := resp.StatusCode
resp.Body.Close()
if statusCode != 200 {
return nil, fmt.Errorf("GitHub PR commits failed: status %d", statusCode)
}
if decodeErr != nil {
return nil, decodeErr
}
for _, c := range commits {
shas = append(shas, c.SHA)
}
if len(commits) < perPage {
break
}
}
return shas, nil
}
func (p *GitHubProvider) GetMergeRequestChanges(ctx context.Context, mrID string) ([]*models.CodeDiff, error) {
log.Printf("[DEBUG] GetMergeRequestChanges called with mrID: '%s', PAT length: %d", mrID, len(p.PAT))
// Simple string splitting instead of complex scanf
parts := strings.Split(mrID, "/")
if len(parts) != 3 {
log.Printf("[DEBUG] Invalid mrID format, expected 'owner/repo/number', got '%s' with %d parts: %v", mrID, len(parts), parts)
return nil, fmt.Errorf("invalid GitHub PR ID format: expected 'owner/repo/number', got '%s'", mrID)
}
owner := parts[0]
repo := parts[1]
number := parts[2]
log.Printf("[DEBUG] Parsed GitHub PR: owner='%s', repo='%s', number='%s'", owner, repo, number)
url := fmt.Sprintf("https://api.github.com/repos/%s/%s/pulls/%s/files", owner, repo, number)
req, _ := http.NewRequestWithContext(ctx, "GET", url, nil)
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("GitHub PR files failed: %s", resp.Status)
}
var files []struct {
Filename string `json:"filename"`
Status string `json:"status"`
Additions int `json:"additions"`
Deletions int `json:"deletions"`
Changes int `json:"changes"`
Patch string `json:"patch"`
SHA string `json:"sha"`
}
if err := json.NewDecoder(resp.Body).Decode(&files); err != nil {
return nil, err
}
if capture.Enabled() {
payload := map[string]interface{}{
"owner": owner,
"repo": repo,
"number": number,
"files": files,
}
capture.WriteJSON("github-pr-files", payload)
}
log.Printf("[DEBUG] GitHub API returned %d files", len(files))
var diffs []*models.CodeDiff
for _, f := range files {
log.Printf("[DEBUG] Processing file: %s, status: %s, patch length: %d", f.Filename, f.Status, len(f.Patch))
// Parse the patch into hunks
hunks := p.parsePatchIntoHunks(f.Patch)
diff := &models.CodeDiff{
FilePath: f.Filename,
CommitID: f.SHA,
FileType: p.getFileType(f.Filename),
IsNew: f.Status == "added",
IsDeleted: f.Status == "removed",
IsRenamed: f.Status == "renamed",
Hunks: hunks,
}
log.Printf("[DEBUG] Created CodeDiff for %s with %d hunks", f.Filename, len(hunks))
diffs = append(diffs, diff)
}
log.Printf("[DEBUG] Returning %d diffs with actual content", len(diffs))
if capture.Enabled() {
payload := map[string]interface{}{
"owner": owner,
"repo": repo,
"number": number,
"diffs": diffs,
}
capture.WriteJSON("github-pr-diffs", payload)
}
return diffs, nil
}
// GetCompareChanges fetches the diff between two refs via GitHub's compare-two-commits API, plus the SHAs of every commit in that range (oldest first, as GitHub returns them); used for scheduled reviews (no PR to diff against).
func (p *GitHubProvider) GetCompareChanges(ctx context.Context, owner, repo, base, head string) ([]*models.CodeDiff, []string, error) {
apiURL := fmt.Sprintf("https://api.github.com/repos/%s/%s/compare/%s...%s", owner, repo, base, head)
req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
if err != nil {
return nil, nil, err
}
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return nil, nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
body, _ := io.ReadAll(resp.Body)
return nil, nil, fmt.Errorf("GitHub compare failed: %s: %s", resp.Status, string(body))
}
var compare struct {
Commits []struct {
SHA string `json:"sha"`
} `json:"commits"`
Files []struct {
Filename string `json:"filename"`
Status string `json:"status"`
Additions int `json:"additions"`
Deletions int `json:"deletions"`
Changes int `json:"changes"`
Patch string `json:"patch"`
SHA string `json:"sha"`
} `json:"files"`
}
if err := json.NewDecoder(resp.Body).Decode(&compare); err != nil {
return nil, nil, err
}
var diffs []*models.CodeDiff
for _, f := range compare.Files {
hunks := p.parsePatchIntoHunks(f.Patch)
diffs = append(diffs, &models.CodeDiff{
FilePath: f.Filename,
CommitID: f.SHA,
FileType: p.getFileType(f.Filename),
IsNew: f.Status == "added",
IsDeleted: f.Status == "removed",
IsRenamed: f.Status == "renamed",
Hunks: hunks,
})
}
commitSHAs := make([]string, 0, len(compare.Commits))
for _, c := range compare.Commits {
commitSHAs = append(commitSHAs, c.SHA)
}
if capture.Enabled() {
capture.WriteJSON("github-compare-diffs", map[string]interface{}{
"owner": owner,
"repo": repo,
"base": base,
"head": head,
"diffs": diffs,
})
}
return diffs, commitSHAs, nil
}
// GetDefaultBranch returns the repository's default branch name (e.g. "main").
func (p *GitHubProvider) GetDefaultBranch(ctx context.Context, owner, repo string) (string, error) {
apiURL := fmt.Sprintf("https://api.github.com/repos/%s/%s", owner, repo)
req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
if err != nil {
return "", err
}
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
body, _ := io.ReadAll(resp.Body)
return "", fmt.Errorf("GitHub get repo failed: %s: %s", resp.Status, string(body))
}
var repoInfo struct {
DefaultBranch string `json:"default_branch"`
}
if err := json.NewDecoder(resp.Body).Decode(&repoInfo); err != nil {
return "", err
}
if repoInfo.DefaultBranch == "" {
return "", fmt.Errorf("GitHub repo %s/%s has no default branch", owner, repo)
}
return repoInfo.DefaultBranch, nil
}
// GetBranchHeadSHA returns the current HEAD commit SHA of a branch.
func (p *GitHubProvider) GetBranchHeadSHA(ctx context.Context, owner, repo, branch string) (string, error) {
apiURL := fmt.Sprintf("https://api.github.com/repos/%s/%s/commits/%s", owner, repo, url.PathEscape(branch))
req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
if err != nil {
return "", err
}
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
body, _ := io.ReadAll(resp.Body)
return "", fmt.Errorf("GitHub get branch head failed: %s: %s", resp.Status, string(body))
}
var commit struct {
SHA string `json:"sha"`
}
if err := json.NewDecoder(resp.Body).Decode(&commit); err != nil {
return "", err
}
if commit.SHA == "" {
return "", fmt.Errorf("GitHub branch %s/%s@%s has no commits", owner, repo, branch)
}
return commit.SHA, nil
}
// GetCommitBefore returns the SHA of the most recent commit at or before the given time (empty string, no error, if none).
func (p *GitHubProvider) GetCommitBefore(ctx context.Context, owner, repo, branch string, before time.Time) (string, error) {
apiURL := fmt.Sprintf(
"https://api.github.com/repos/%s/%s/commits?sha=%s&until=%s&per_page=1",
owner, repo, url.QueryEscape(branch), url.QueryEscape(before.UTC().Format(time.RFC3339)),
)
req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
if err != nil {
return "", err
}
req.Header.Set("Authorization", "token "+p.PAT)
req.Header.Set("Accept", "application/vnd.github.v3+json")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
body, _ := io.ReadAll(resp.Body)
return "", fmt.Errorf("GitHub list commits failed: %s: %s", resp.Status, string(body))
}
var commits []struct {
SHA string `json:"sha"`
}
if err := json.NewDecoder(resp.Body).Decode(&commits); err != nil {
return "", err
}
if len(commits) == 0 {
return "", nil
}
return commits[0].SHA, nil
}
// parsePatchIntoHunks parses a GitHub patch string into DiffHunk objects
func (p *GitHubProvider) parsePatchIntoHunks(patch string) []models.DiffHunk {
if patch == "" {
return nil
}
lines := strings.Split(patch, "\n")
var hunks []models.DiffHunk
var currentHunk *models.DiffHunk
var hunkContent strings.Builder
// Regex to match hunk headers like @@ -1,3 +1,4 @@
hunkHeaderRegex := regexp.MustCompile(`^@@ -(\d+),?(\d*) \+(\d+),?(\d*) @@`)
for _, line := range lines {
if match := hunkHeaderRegex.FindStringSubmatch(line); match != nil {
// Save previous hunk if exists
if currentHunk != nil {
currentHunk.Content = strings.TrimSuffix(hunkContent.String(), "\n")
hunks = append(hunks, *currentHunk)
hunkContent.Reset()
}
// Parse hunk header
oldStart, _ := strconv.Atoi(match[1])
oldCount := 1
if match[2] != "" {
oldCount, _ = strconv.Atoi(match[2])
}
newStart, _ := strconv.Atoi(match[3])
newCount := 1
if match[4] != "" {
newCount, _ = strconv.Atoi(match[4])
}
currentHunk = &models.DiffHunk{
OldStartLine: oldStart,
OldLineCount: oldCount,
NewStartLine: newStart,
NewLineCount: newCount,
}
// Include the header line in the content
hunkContent.WriteString(line + "\n")
} else if currentHunk != nil {
// Add content lines to current hunk
hunkContent.WriteString(line + "\n")
}
}
// Save the last hunk
if currentHunk != nil {
currentHunk.Content = strings.TrimSuffix(hunkContent.String(), "\n")
hunks = append(hunks, *currentHunk)
}
return hunks
}
// getFileType determines file type based on extension
func (p *GitHubProvider) getFileType(filename string) string {
parts := strings.Split(filename, ".")
if len(parts) > 1 {
return parts[len(parts)-1]
}
return "unknown"
}
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