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Monorepo for Tangled forked from tangled.org/core
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import ( "bytes" "context" "fmt" "image" "image/color" "image/png" "log" "net/http"
"tangled.org/core/appview/models" "tangled.org/core/appview/ogcard")
func (rp *Issues) drawIssueSummaryCard(issue *models.Issue, repo *models.Repo, commentCount int, ownerHandle string) (*ogcard.Card, error) { width, height := ogcard.DefaultSize() mainCard, err := ogcard.NewCard(width, height) if err != nil { return nil, err }
// Split: content area (75%) and status/stats area (25%) contentCard, statsArea := mainCard.Split(false, 75)
// Add padding to content contentCard.SetMargin(50)
// Split content horizontally: main content (80%) and avatar area (20%) mainContent, avatarArea := contentCard.Split(true, 80)
// Add margin to main content like repo card mainContent.SetMargin(10)
// Use full main content area for repo name and title bounds := mainContent.Img.Bounds() startX := bounds.Min.X + mainContent.Margin startY := bounds.Min.Y + mainContent.Margin
// Draw full repository name at top (owner/repo format) var repoOwner string owner, err := rp.idResolver.ResolveIdent(context.Background(), repo.Did) if err != nil { repoOwner = repo.Did } else { repoOwner = "@" + owner.Handle.String() }
fullRepoName := repoOwner + " / " + repo.Name if len(fullRepoName) > 60 { fullRepoName = fullRepoName[:60] + "…" }
grayColor := color.RGBA{88, 96, 105, 255} err = mainContent.DrawTextAt(fullRepoName, startX, startY, grayColor, 36, ogcard.Top, ogcard.Left) if err != nil { return nil, err }
// Draw issue title below repo name with wrapping titleY := startY + 60 titleX := startX
// Truncate title if too long issueTitle := issue.Title maxTitleLength := 80 if len(issueTitle) > maxTitleLength { issueTitle = issueTitle[:maxTitleLength] + "…" }
// Create a temporary card for the title area to enable wrapping titleBounds := mainContent.Img.Bounds() titleWidth := titleBounds.Dx() - (startX - titleBounds.Min.X) - 20 // Leave some margin titleHeight := titleBounds.Dy() - (titleY - titleBounds.Min.Y) - 100 // Leave space for issue ID
titleRect := image.Rect(titleX, titleY, titleX+titleWidth, titleY+titleHeight) titleCard := &ogcard.Card{ Img: mainContent.Img.SubImage(titleRect).(*image.RGBA), Font: mainContent.Font, Margin: 0, }
// Draw wrapped title lines, err := titleCard.DrawText(issueTitle, color.Black, 54, ogcard.Top, ogcard.Left) if err != nil { return nil, err }
// Calculate where title ends (number of lines * line height) lineHeight := 60 // Approximate line height for 54pt font titleEndY := titleY + (len(lines) * lineHeight) + 10
// Draw issue ID in gray below the title issueIdText := fmt.Sprintf("#%d", issue.IssueId) err = mainContent.DrawTextAt(issueIdText, startX, titleEndY, grayColor, 54, ogcard.Top, ogcard.Left) if err != nil { return nil, err }
// Get issue author handle (needed for avatar and metadata) var authorHandle string author, err := rp.idResolver.ResolveIdent(context.Background(), issue.Did) if err != nil { authorHandle = issue.Did } else { authorHandle = "@" + author.Handle.String() }
// Draw avatar circle on the right side avatarBounds := avatarArea.Img.Bounds() avatarSize := min(avatarBounds.Dx(), avatarBounds.Dy()) - 20 // Leave some margin if avatarSize > 220 { avatarSize = 220 } avatarX := avatarBounds.Min.X + (avatarBounds.Dx() / 2) - (avatarSize / 2) avatarY := avatarBounds.Min.Y + 20
// Get avatar URL for issue author avatarURL := rp.pages.AvatarUrl(authorHandle, "256") err = avatarArea.DrawCircularExternalImage(avatarURL, avatarX, avatarY, avatarSize) if err != nil { log.Printf("failed to draw avatar (non-fatal): %v", err) }
// Split stats area: left side for status/comments (80%), right side for dolly (20%) statusCommentsArea, dollyArea := statsArea.Split(true, 80)
// Draw status and comment count in status/comments area statsBounds := statusCommentsArea.Img.Bounds() statsX := statsBounds.Min.X + 60 // left padding statsY := statsBounds.Min.Y
iconColor := color.RGBA{88, 96, 105, 255} iconSize := 36 textSize := 36.0 labelSize := 28.0 iconBaselineOffset := int(textSize) / 2
// Draw status (open/closed) with colored icon and text var statusIcon string var statusText string var statusBgColor color.RGBA
if issue.Open { statusIcon = "circle-dot" statusText = "open" statusBgColor = color.RGBA{34, 139, 34, 255} // green } else { statusIcon = "ban" statusText = "closed" statusBgColor = color.RGBA{52, 58, 64, 255} // dark gray }
badgeIconSize := 36
// Draw icon with status color (no background) err = statusCommentsArea.DrawLucideIcon(statusIcon, statsX, statsY+iconBaselineOffset-badgeIconSize/2+5, badgeIconSize, statusBgColor) if err != nil { log.Printf("failed to draw status icon: %v", err) }
// Draw text with status color (no background) textX := statsX + badgeIconSize + 12 badgeTextSize := 32.0 err = statusCommentsArea.DrawTextAt(statusText, textX, statsY+iconBaselineOffset, statusBgColor, badgeTextSize, ogcard.Middle, ogcard.Left) if err != nil { log.Printf("failed to draw status text: %v", err) }
statusTextWidth := len(statusText) * 20 currentX := statsX + badgeIconSize + 12 + statusTextWidth + 50
// Draw comment count err = statusCommentsArea.DrawLucideIcon("message-square", currentX, statsY+iconBaselineOffset-iconSize/2+5, iconSize, iconColor) if err != nil { log.Printf("failed to draw comment icon: %v", err) }
currentX += iconSize + 15 commentText := fmt.Sprintf("%d comments", commentCount) if commentCount == 1 { commentText = "1 comment" } err = statusCommentsArea.DrawTextAt(commentText, currentX, statsY+iconBaselineOffset, iconColor, textSize, ogcard.Middle, ogcard.Left) if err != nil { log.Printf("failed to draw comment text: %v", err) }
// Draw dolly logo on the right side dollyBounds := dollyArea.Img.Bounds() dollySize := 90 dollyX := dollyBounds.Min.X + (dollyBounds.Dx() / 2) - (dollySize / 2) dollyY := statsY + iconBaselineOffset - dollySize/2 + 25 dollyColor := color.RGBA{180, 180, 180, 255} // light gray err = dollyArea.DrawDollySilhouette(dollyX, dollyY, dollySize, dollyColor) if err != nil { log.Printf("dolly silhouette not available (this is ok): %v", err) }
// Draw "opened by @author" and date at the bottom with more spacing labelY := statsY + iconSize + 30
// Format the opened date openedDate := issue.Created.Format("Jan 2, 2006") metaText := fmt.Sprintf("opened by %s · %s", authorHandle, openedDate)
err = statusCommentsArea.DrawTextAt(metaText, statsX, labelY, iconColor, labelSize, ogcard.Top, ogcard.Left) if err != nil { log.Printf("failed to draw metadata: %v", err) }
return mainCard, nil}
func (rp *Issues) IssueOpenGraphSummary(w http.ResponseWriter, r *http.Request) { f, err := rp.repoResolver.Resolve(r) if err != nil { log.Println("failed to get repo and knot", err) return }
issue, ok := r.Context().Value("issue").(*models.Issue) if !ok { log.Println("issue not found in context") http.Error(w, "issue not found", http.StatusNotFound) return }
// Get comment count commentCount := len(issue.Comments)
// Get owner handle for avatar var ownerHandle string owner, err := rp.idResolver.ResolveIdent(r.Context(), f.Did) if err != nil { ownerHandle = f.Did } else { ownerHandle = "@" + owner.Handle.String() }
card, err := rp.drawIssueSummaryCard(issue, f, commentCount, ownerHandle) if err != nil { log.Println("failed to draw issue summary card", err) http.Error(w, "failed to draw issue summary card", http.StatusInternalServerError) return }
var imageBuffer bytes.Buffer err = png.Encode(&imageBuffer, card.Img) if err != nil { log.Println("failed to encode issue summary card", err) http.Error(w, "failed to encode issue summary card", http.StatusInternalServerError) return }
imageBytes := imageBuffer.Bytes()
w.Header().Set("Content-Type", "image/png") w.Header().Set("Cache-Control", "public, max-age=3600") // 1 hour w.WriteHeader(http.StatusOK) _, err = w.Write(imageBytes) if err != nil { log.Println("failed to write issue summary card", err) return }}