forked from
tangled.org/core
Monorepo for Tangled
appview/pulls: og image for pulls
Signed-off-by: Anirudh Oppiliappan <anirudh@tangled.org>
author
Anirudh Oppiliappan
committer
Tangled
date
(Oct 15, 2025, 3:24 PM UTC)
commit
1fbd91e6
1fbd91e609ac960bacd56f51226d5e417d4cbbee
parent
824b0d25
824b0d253601e59ae6c6c5a7dac1480e4f29bcb5
change-id
rzqooook
rzqooookrsmsuotoomvqvlvysttywtzq
+353
+19
appview/pages/templates/repo/pulls/fragments/og.html
+19
appview/pages/templates/repo/pulls/fragments/og.html
···
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{{ define "pulls/fragments/og" }}
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{{ $title := printf "%s #%d" .Pull.Title .Pull.PullId }}
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{{ $description := or .Pull.Body .RepoInfo.Description }}
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{{ $url := printf "https://tangled.org/%s/pulls/%d" .RepoInfo.FullName .Pull.PullId }}
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{{ $imageUrl := printf "https://tangled.org/%s/pulls/%d/opengraph" .RepoInfo.FullName .Pull.PullId }}
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<meta property="og:title" content="{{ unescapeHtml $title }}" />
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<meta property="og:type" content="object" />
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<meta property="og:url" content="{{ $url }}" />
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<meta property="og:description" content="{{ $description }}" />
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<meta property="og:image" content="{{ $imageUrl }}" />
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<meta property="og:image:width" content="1200" />
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<meta property="og:image:height" content="600" />
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<meta name="twitter:card" content="summary_large_image" />
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<meta name="twitter:title" content="{{ unescapeHtml $title }}" />
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<meta name="twitter:description" content="{{ $description }}" />
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<meta name="twitter:image" content="{{ $imageUrl }}" />
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{{ end }}
+333
appview/pulls/opengraph.go
+333
appview/pulls/opengraph.go
···
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package pulls
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import (
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"bytes"
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"context"
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"fmt"
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"image"
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"image/color"
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"image/png"
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"log"
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"net/http"
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"tangled.org/core/appview/db"
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"tangled.org/core/appview/models"
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"tangled.org/core/appview/ogcard"
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"tangled.org/core/patchutil"
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"tangled.org/core/types"
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)
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func (s *Pulls) drawPullSummaryCard(pull *models.Pull, repo *models.Repo, commentCount int, diffStats types.DiffStat, filesChanged int) (*ogcard.Card, error) {
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width, height := ogcard.DefaultSize()
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mainCard, err := ogcard.NewCard(width, height)
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if err != nil {
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return nil, err
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}
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// Split: content area (75%) and status/stats area (25%)
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contentCard, statsArea := mainCard.Split(false, 75)
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// Add padding to content
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contentCard.SetMargin(50)
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// Split content horizontally: main content (80%) and avatar area (20%)
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mainContent, avatarArea := contentCard.Split(true, 80)
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// Add margin to main content
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mainContent.SetMargin(10)
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// Use full main content area for repo name and title
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bounds := mainContent.Img.Bounds()
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startX := bounds.Min.X + mainContent.Margin
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startY := bounds.Min.Y + mainContent.Margin
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// Draw full repository name at top (owner/repo format)
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var repoOwner string
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owner, err := s.idResolver.ResolveIdent(context.Background(), repo.Did)
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if err != nil {
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repoOwner = repo.Did
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} else {
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repoOwner = "@" + owner.Handle.String()
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}
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fullRepoName := repoOwner + " / " + repo.Name
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if len(fullRepoName) > 60 {
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fullRepoName = fullRepoName[:60] + "…"
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}
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grayColor := color.RGBA{88, 96, 105, 255}
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err = mainContent.DrawTextAt(fullRepoName, startX, startY, grayColor, 36, ogcard.Top, ogcard.Left)
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if err != nil {
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return nil, err
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}
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// Draw pull request title below repo name with wrapping
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titleY := startY + 60
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titleX := startX
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// Truncate title if too long
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pullTitle := pull.Title
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maxTitleLength := 80
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if len(pullTitle) > maxTitleLength {
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pullTitle = pullTitle[:maxTitleLength] + "…"
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}
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// Create a temporary card for the title area to enable wrapping
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titleBounds := mainContent.Img.Bounds()
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titleWidth := titleBounds.Dx() - (startX - titleBounds.Min.X) - 20 // Leave some margin
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titleHeight := titleBounds.Dy() - (titleY - titleBounds.Min.Y) - 100 // Leave space for pull ID
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titleRect := image.Rect(titleX, titleY, titleX+titleWidth, titleY+titleHeight)
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titleCard := &ogcard.Card{
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Img: mainContent.Img.SubImage(titleRect).(*image.RGBA),
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Font: mainContent.Font,
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Margin: 0,
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}
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// Draw wrapped title
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lines, err := titleCard.DrawText(pullTitle, color.Black, 54, ogcard.Top, ogcard.Left)
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if err != nil {
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return nil, err
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}
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// Calculate where title ends (number of lines * line height)
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lineHeight := 60 // Approximate line height for 54pt font
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titleEndY := titleY + (len(lines) * lineHeight) + 10
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// Draw pull ID in gray below the title
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pullIdText := fmt.Sprintf("#%d", pull.PullId)
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err = mainContent.DrawTextAt(pullIdText, startX, titleEndY, grayColor, 54, ogcard.Top, ogcard.Left)
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if err != nil {
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return nil, err
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}
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// Get pull author handle (needed for avatar and metadata)
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var authorHandle string
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author, err := s.idResolver.ResolveIdent(context.Background(), pull.OwnerDid)
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if err != nil {
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authorHandle = pull.OwnerDid
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} else {
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authorHandle = "@" + author.Handle.String()
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}
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// Draw avatar circle on the right side
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avatarBounds := avatarArea.Img.Bounds()
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avatarSize := min(avatarBounds.Dx(), avatarBounds.Dy()) - 20 // Leave some margin
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if avatarSize > 220 {
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avatarSize = 220
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}
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avatarX := avatarBounds.Min.X + (avatarBounds.Dx() / 2) - (avatarSize / 2)
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avatarY := avatarBounds.Min.Y + 20
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// Get avatar URL for pull author
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avatarURL := s.pages.AvatarUrl(authorHandle, "256")
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err = avatarArea.DrawCircularExternalImage(avatarURL, avatarX, avatarY, avatarSize)
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if err != nil {
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log.Printf("failed to draw avatar (non-fatal): %v", err)
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}
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// Split stats area: left side for status/stats (80%), right side for dolly (20%)
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statusStatsArea, dollyArea := statsArea.Split(true, 80)
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// Draw status and stats
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statsBounds := statusStatsArea.Img.Bounds()
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statsX := statsBounds.Min.X + 60 // left padding
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statsY := statsBounds.Min.Y
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iconColor := color.RGBA{88, 96, 105, 255}
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iconSize := 36
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textSize := 36.0
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labelSize := 28.0
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iconBaselineOffset := int(textSize) / 2
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// Draw status (open/merged/closed) with colored icon and text
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var statusIcon string
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var statusText string
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var statusColor color.RGBA
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if pull.State.IsOpen() {
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statusIcon = "static/icons/git-pull-request.svg"
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statusText = "open"
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statusColor = color.RGBA{34, 139, 34, 255} // green
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} else if pull.State.IsMerged() {
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statusIcon = "static/icons/git-merge.svg"
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statusText = "merged"
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statusColor = color.RGBA{138, 43, 226, 255} // purple
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} else {
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statusIcon = "static/icons/git-pull-request-closed.svg"
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statusText = "closed"
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statusColor = color.RGBA{128, 128, 128, 255} // gray
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}
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statusIconSize := 36
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// Draw icon with status color
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err = statusStatsArea.DrawSVGIcon(statusIcon, statsX, statsY+iconBaselineOffset-statusIconSize/2+5, statusIconSize, statusColor)
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if err != nil {
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log.Printf("failed to draw status icon: %v", err)
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}
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// Draw text with status color
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textX := statsX + statusIconSize + 12
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statusTextSize := 32.0
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err = statusStatsArea.DrawTextAt(statusText, textX, statsY+iconBaselineOffset, statusColor, statusTextSize, ogcard.Middle, ogcard.Left)
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if err != nil {
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log.Printf("failed to draw status text: %v", err)
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}
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statusTextWidth := len(statusText) * 20
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currentX := statsX + statusIconSize + 12 + statusTextWidth + 40
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// Draw comment count
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err = statusStatsArea.DrawSVGIcon("static/icons/message-square.svg", currentX, statsY+iconBaselineOffset-iconSize/2+5, iconSize, iconColor)
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if err != nil {
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log.Printf("failed to draw comment icon: %v", err)
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}
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currentX += iconSize + 15
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commentText := fmt.Sprintf("%d comments", commentCount)
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if commentCount == 1 {
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commentText = "1 comment"
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}
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err = statusStatsArea.DrawTextAt(commentText, currentX, statsY+iconBaselineOffset, iconColor, textSize, ogcard.Middle, ogcard.Left)
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if err != nil {
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log.Printf("failed to draw comment text: %v", err)
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}
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commentTextWidth := len(commentText) * 20
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currentX += commentTextWidth + 40
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// Draw files changed
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err = statusStatsArea.DrawSVGIcon("static/icons/file-diff.svg", currentX, statsY+iconBaselineOffset-iconSize/2+5, iconSize, iconColor)
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if err != nil {
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log.Printf("failed to draw file diff icon: %v", err)
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}
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currentX += iconSize + 15
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filesText := fmt.Sprintf("%d files", filesChanged)
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if filesChanged == 1 {
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filesText = "1 file"
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}
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err = statusStatsArea.DrawTextAt(filesText, currentX, statsY+iconBaselineOffset, iconColor, textSize, ogcard.Middle, ogcard.Left)
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if err != nil {
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log.Printf("failed to draw files text: %v", err)
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}
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filesTextWidth := len(filesText) * 20
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currentX += filesTextWidth + 40
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// Draw additions (green +)
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greenColor := color.RGBA{34, 139, 34, 255}
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err = statusStatsArea.DrawSVGIcon("static/icons/plus.svg", currentX, statsY+iconBaselineOffset-iconSize/2+5, iconSize, greenColor)
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if err != nil {
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log.Printf("failed to draw plus icon: %v", err)
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}
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currentX += iconSize + 15
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additionsText := fmt.Sprintf("%d", diffStats.Insertions)
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err = statusStatsArea.DrawTextAt(additionsText, currentX, statsY+iconBaselineOffset, greenColor, textSize, ogcard.Middle, ogcard.Left)
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if err != nil {
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log.Printf("failed to draw additions text: %v", err)
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}
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additionsTextWidth := len(additionsText) * 20
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currentX += additionsTextWidth + 15
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// Draw deletions (red -) right next to additions
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redColor := color.RGBA{220, 20, 60, 255}
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err = statusStatsArea.DrawSVGIcon("static/icons/minus.svg", currentX, statsY+iconBaselineOffset-iconSize/2+5, iconSize, redColor)
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if err != nil {
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log.Printf("failed to draw minus icon: %v", err)
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}
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currentX += iconSize + 15
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deletionsText := fmt.Sprintf("%d", diffStats.Deletions)
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err = statusStatsArea.DrawTextAt(deletionsText, currentX, statsY+iconBaselineOffset, redColor, textSize, ogcard.Middle, ogcard.Left)
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if err != nil {
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log.Printf("failed to draw deletions text: %v", err)
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}
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// Draw dolly logo on the right side
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dollyBounds := dollyArea.Img.Bounds()
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dollySize := 90
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dollyX := dollyBounds.Min.X + (dollyBounds.Dx() / 2) - (dollySize / 2)
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dollyY := statsY + iconBaselineOffset - dollySize/2 + 25
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dollyColor := color.RGBA{180, 180, 180, 255} // light gray
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err = dollyArea.DrawSVGIcon("templates/fragments/dolly/silhouette.svg", dollyX, dollyY, dollySize, dollyColor)
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if err != nil {
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log.Printf("dolly silhouette not available (this is ok): %v", err)
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}
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// Draw "opened by @author" and date at the bottom with more spacing
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labelY := statsY + iconSize + 30
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// Format the opened date
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openedDate := pull.Created.Format("Jan 2, 2006")
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metaText := fmt.Sprintf("opened by %s · %s", authorHandle, openedDate)
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err = statusStatsArea.DrawTextAt(metaText, statsX, labelY, iconColor, labelSize, ogcard.Top, ogcard.Left)
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if err != nil {
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log.Printf("failed to draw metadata: %v", err)
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}
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return mainCard, nil
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}
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func (s *Pulls) PullOpenGraphSummary(w http.ResponseWriter, r *http.Request) {
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f, err := s.repoResolver.Resolve(r)
278
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if err != nil {
279
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log.Println("failed to get repo and knot", err)
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return
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}
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pull, ok := r.Context().Value("pull").(*models.Pull)
284
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if !ok {
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log.Println("pull not found in context")
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http.Error(w, "pull not found", http.StatusNotFound)
287
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return
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}
289
+
290
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// Get comment count from database
291
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comments, err := db.GetPullComments(s.db, db.FilterEq("pull_id", pull.ID))
292
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if err != nil {
293
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log.Printf("failed to get pull comments: %v", err)
294
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}
295
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commentCount := len(comments)
296
+
297
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// Calculate diff stats from latest submission using patchutil
298
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var diffStats types.DiffStat
299
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filesChanged := 0
300
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if len(pull.Submissions) > 0 {
301
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latestSubmission := pull.Submissions[len(pull.Submissions)-1]
302
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niceDiff := patchutil.AsNiceDiff(latestSubmission.Patch, pull.TargetBranch)
303
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diffStats.Insertions = int64(niceDiff.Stat.Insertions)
304
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diffStats.Deletions = int64(niceDiff.Stat.Deletions)
305
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filesChanged = niceDiff.Stat.FilesChanged
306
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}
307
+
308
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card, err := s.drawPullSummaryCard(pull, &f.Repo, commentCount, diffStats, filesChanged)
309
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if err != nil {
310
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log.Println("failed to draw pull summary card", err)
311
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http.Error(w, "failed to draw pull summary card", http.StatusInternalServerError)
312
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return
313
+
}
314
+
315
+
var imageBuffer bytes.Buffer
316
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err = png.Encode(&imageBuffer, card.Img)
317
+
if err != nil {
318
+
log.Println("failed to encode pull summary card", err)
319
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http.Error(w, "failed to encode pull summary card", http.StatusInternalServerError)
320
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return
321
+
}
322
+
323
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imageBytes := imageBuffer.Bytes()
324
+
325
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w.Header().Set("Content-Type", "image/png")
326
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w.Header().Set("Cache-Control", "public, max-age=3600") // 1 hour
327
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w.WriteHeader(http.StatusOK)
328
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_, err = w.Write(imageBytes)
329
+
if err != nil {
330
+
log.Println("failed to write pull summary card", err)
331
+
return
332
+
}
333
+
}