Basics of interactions for pixelfed

.syndicate

@@ -3,13 +3,14 @@ publish_url = "https://www.byjp.me/"
 feeds = ["index.xml"]
 content_glob = "content/**/*.md"
 interactions_dir = "data/interactions/"
+interaction_pfps_dir = "static/interaction-pfps/"
 
 [sites]
-  [sites.instagram]
-    type = "instagram"
-    username = "jphastings"
-    password_envvar = "INSTAGRAM_PASSWORD"
-    totp_envvar = "INSTAGRAM_TOTP"
+  # [sites.instagram]
+  #   type = "instagram"
+  #   username = "jphastings"
+  #   password_envvar = "INSTAGRAM_PASSWORD"
+  #   totp_envvar = "INSTAGRAM_TOTP"
 
   # [sites.bluesky]
   #   type = "bluesky"

data/interactions/photos/mums-garden/interactions.json

@@ -0,0 +1 @@
+[{"emoji":"⭐️","author":{"name":"JP","url":"https://hachyderm.io/users/byjp"},"timestamp":"2022-12-14T11:16:00Z"},{"emoji":"⭐️","author":{"name":"Ben!","url":"https://pixelfed.social/bencord0"},"timestamp":"2019-09-14T08:43:33Z"},{"emoji":"⭐️","author":{"name":"Thomas Zimmermann","url":"https://pixelfed.social/curlingtom"},"timestamp":"2022-10-30T14:12:09Z"},{"emoji":"⭐️","author":{"name":"Ivan Jurišić","url":"https://pixelfed.social/ijurisic"},"timestamp":"2019-09-27T22:53:45Z"}]

data/interactions/photos/sunny-brunch/interactions.json

@@ -0,0 +1 @@
+[{"emoji":"⭐️","author":{"name":"Rui Almeida","url":"https://pixelfed.social/RJCA_PT"},"timestamp":"2022-12-03T15:13:46Z"}]

tools/syndicate/backfeeder/backfeeder.go

@@ -1,17 +1,69 @@
 package backfeeder
 
 import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+
 	"github.com/by-jp/www.byjp.me/tools/syndicate/services"
+	"github.com/by-jp/www.byjp.me/tools/syndicate/shared"
 )
 
-type backfeeder struct {
-	services *services.List
-	done     map[string]struct{}
+type BackfeedRef struct {
+	Source   string
+	LocalURL string
 }
 
-func New(services *services.List) *backfeeder {
+type ToBackfeedList map[string]BackfeedRef
+
+type backfeeder struct {
+	services  *services.List
+	done      map[string]struct{}
+	urlToPath func(string) string
+}
+
+func New(services *services.List, urlToPath func(string) string) *backfeeder {
 	return &backfeeder{
-		services: services,
-		done:     make(map[string]struct{}),
+		services:  services,
+		done:      make(map[string]struct{}),
+		urlToPath: urlToPath,
 	}
 }
+
+func (b *backfeeder) BackfeedAll(toBackfeed ToBackfeedList) error {
+	allIAs := make(map[string][]shared.Interaction)
+
+	for remoteURL, ref := range toBackfeed {
+		ias, err := b.services.Service(ref.Source).Interactions(remoteURL)
+		if err != nil {
+			return err
+		}
+
+		path := b.urlToPath(ref.LocalURL)
+		allIAs[path] = append(allIAs[path], ias...)
+	}
+
+	for postDir, ias := range allIAs {
+		if err := writeInteractions(postDir, ias); err != nil {
+			return fmt.Errorf("couldn't write interactions into %s: %w", postDir, err)
+		}
+	}
+	return nil
+}
+
+func writeInteractions(dir string, ias []shared.Interaction) error {
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return err
+	}
+	path := filepath.Join(dir, "interactions.json")
+
+	f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	enc := json.NewEncoder(f)
+	return enc.Encode(ias)
+}

tools/syndicate/config.go

@@ -30,13 +30,13 @@ type fileConfig struct {
 }
 
 type config struct {
-	feeds               []string
-	services            *services.List
-	interactionsDir     string
-	content             []string
-	tagMatcher          *regexp.Regexp
-	syndicationMatchers map[string]*regexp.Regexp
-	urlToPath           func(string) string
+	feeds                 []string
+	services              *services.List
+	content               []string
+	tagMatcher            *regexp.Regexp
+	syndicationMatchers   map[string]*regexp.Regexp
+	urlToPublicPath       func(string) string
+	urlToInteractionsPath func(string) string
 }
 
 func parseConfig(cfgPath string) (*config, error) {
@@ -48,11 +48,14 @@ func parseConfig(cfgPath string) (*config, error) {
 
 	cfg := &config{
 		feeds:               []string{},
+		services:            services.New(),
 		syndicationMatchers: make(map[string]*regexp.Regexp),
-		interactionsDir:     cfgData.InteractionsDir,
-		urlToPath: func(url string) string {
+		urlToPublicPath: func(url string) string {
 			return path.Join(cfgData.PublishRoot, strings.TrimPrefix(url, cfgData.PublishURL))
 		},
+		urlToInteractionsPath: func(url string) string {
+			return path.Join(cfgData.InteractionsDir, strings.TrimPrefix(url, cfgData.PublishURL))
+		},
 	}
 
 	cfg.content, err = doublestar.Glob(os.DirFS("."), cfgData.ContentGlob)

tools/syndicate/feeds.go

@@ -6,14 +6,13 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/by-jp/www.byjp.me/tools/syndicate/backfeeder"
 	"github.com/by-jp/www.byjp.me/tools/syndicate/poster"
 	"github.com/by-jp/www.byjp.me/tools/syndicate/shared"
 	"github.com/mmcdole/gofeed"
 )
 
-type toBackfeedMap map[string]string
-
-func parseFeed(urlToPath func(string) string, feedReader io.Reader, tagMatcher *regexp.Regexp, syndicationMatchers map[string]*regexp.Regexp) ([]string, poster.ToPostList, toBackfeedMap, error) {
+func parseFeed(urlToPath func(string) string, feedReader io.Reader, tagMatcher *regexp.Regexp, syndicationMatchers map[string]*regexp.Regexp) ([]string, poster.ToPostList, backfeeder.ToBackfeedList, error) {
 	fp := gofeed.NewParser()
 	feed, err := fp.Parse(feedReader)
 	if err != nil {
@@ -21,7 +20,7 @@ func parseFeed(urlToPath func(string) string, feedReader io.Reader, tagMatcher *
 	}
 
 	toPost := make(poster.ToPostList)
-	toBackfeed := make(toBackfeedMap)
+	toBackfeed := make(backfeeder.ToBackfeedList)
 	services := make(map[string]struct{})
 
 	for _, item := range feed.Items {
@@ -46,7 +45,10 @@ func parseFeed(urlToPath func(string) string, feedReader io.Reader, tagMatcher *
 
 			for sName, bf := range syndicationMatchers {
 				if bf.MatchString(ext.Value) {
-					toBackfeed[ext.Value] = item.Link
+					toBackfeed[ext.Value] = backfeeder.BackfeedRef{
+						Source:   sName,
+						LocalURL: item.Link,
+					}
 					services[sName] = struct{}{}
 					break
 				}

tools/syndicate/main.go

@@ -24,13 +24,13 @@ func main() {
 	check(err)
 
 	pstr := poster.New(cfg.services)
-	bkfd := backfeeder.New(cfg.services)
+	bkfd := backfeeder.New(cfg.services, cfg.urlToInteractionsPath)
 
 	for _, feed := range cfg.feeds {
 		f, err := os.Open(feed)
 		check(err)
 		defer f.Close()
-		services, toPost, toBackfeed, err := parseFeed(cfg.urlToPath, f, cfg.tagMatcher, cfg.syndicationMatchers)
+		services, toPost, toBackfeed, err := parseFeed(cfg.urlToPublicPath, f, cfg.tagMatcher, cfg.syndicationMatchers)
 		check(err)
 
 		if len(services) > 0 {
@@ -43,9 +43,7 @@ func main() {
 		}
 
 		fmt.Fprintf(os.Stderr, "Found %d new syndications to post in %s\n", len(toPost), feed)
-		posted, err := pstr.PostAll(toPost)
-		_ = posted
-		if err != nil {
+		if _, err := pstr.PostAll(toPost); err != nil {
 			fmt.Fprintf(os.Stderr, "Couldn't post syndications: %v\n", err)
 		}
 
@@ -56,6 +54,8 @@ func main() {
 		}
 
 		fmt.Fprintf(os.Stderr, "Found %d existing syndications to backfeed from %s\n", len(toBackfeed), feed)
-		_ = bkfd
+		if err := bkfd.BackfeedAll(toBackfeed); err != nil {
+			fmt.Fprintf(os.Stderr, "Couldn't backfeed syndications: %v\n", err)
+		}
 	}
 }

tools/syndicate/services/mastodon/interactions.go

@@ -1,7 +1,103 @@
 package mastodon
 
-import "github.com/by-jp/www.byjp.me/tools/syndicate/shared"
+import (
+	"context"
+	"fmt"
+
+	"github.com/by-jp/www.byjp.me/tools/syndicate/shared"
+	"github.com/mattn/go-mastodon"
+)
 
 func (s *service) Interactions(url string) ([]shared.Interaction, error) {
-	return nil, nil
+	id, err := s.postID(url)
+	if err != nil {
+		return nil, err
+	}
+
+	var ias []shared.Interaction
+
+	ctx := context.Background()
+	favs, err := s.masto.GetFavouritedBy(ctx, id, nil)
+	if err != nil {
+		return nil, fmt.Errorf("unable to get favourites for %s: %w", url, err)
+	}
+
+	for _, acc := range favs {
+		ias = append(ias, shared.Interaction{
+			Emoji: "⭐️",
+			Author: shared.Author{
+				Name:      acc.DisplayName,
+				URL:       acc.URL,
+				AvatarURL: acc.Avatar,
+			},
+			Timestamp: acc.CreatedAt,
+		})
+	}
+
+	reblogs, err := s.masto.GetRebloggedBy(ctx, id, nil)
+	if err != nil {
+		return nil, fmt.Errorf("unable to get boosts for %s: %w", url, err)
+	}
+
+	for _, acc := range reblogs {
+		ias = append(ias, shared.Interaction{
+			Emoji: "🔁",
+			Author: shared.Author{
+				Name:      acc.DisplayName,
+				URL:       acc.URL,
+				AvatarURL: acc.Avatar,
+			},
+			Timestamp: acc.CreatedAt,
+		})
+	}
+
+	postCtx, err := s.masto.GetStatusContext(ctx, id)
+	if err != nil {
+		return nil, fmt.Errorf("unable to get replies for %s: %w", url, err)
+	}
+
+	for _, reply := range postCtx.Descendants {
+		if reply.Visibility != mastodon.VisibilityPublic {
+			continue
+		}
+
+		ias = append(ias, shared.Interaction{
+			URL:     reply.URL,
+			Comment: reply.Content,
+			Author: shared.Author{
+				Name:      reply.Account.DisplayName,
+				URL:       reply.Account.URL,
+				AvatarURL: reply.Account.Avatar,
+			},
+			Timestamp: reply.CreatedAt,
+		})
+	}
+
+	return ias, nil
+}
+
+func (s *service) postID(url string) (mastodon.ID, error) {
+	re, err := s.BackfeedMatcher()
+	if err != nil {
+		return "", fmt.Errorf("couldn't create the backfeed matcher: %w", err)
+	}
+
+	m := re.FindStringSubmatch(url)
+	if len(m) == 0 {
+		return "", fmt.Errorf("couldn't extract the post ID from the URL")
+	}
+
+	var id string
+	for i, name := range re.SubexpNames() {
+		if name == "id" {
+			id = m[i]
+			break
+		}
+	}
+
+	if id == "" {
+		return "", fmt.Errorf("couldn't extract the post ID from the URL")
+	}
+
+	return mastodon.ID(id), nil
 }

tools/syndicate/services/tracker.go

@@ -11,7 +11,9 @@ type List struct {
 }
 
 func New() *List {
-	return &List{}
+	return &List{
+		available: make(map[string]shared.Service),
+	}
 }
 
 func (l *List) Load(name string, siteConfig any) (shared.Service, error) {

tools/syndicate/shared/types.go

@@ -26,16 +26,19 @@ type Post struct {
 
 type Interaction struct {
 	// eg. Repost is 🔁, Facebook is 👍, Instagram is ♥️, Mastodon is ⭐️, Medium is 👏
-	Emoji string
+	Emoji string `json:"emoji,omitempty"`
 	// The URL of the original interaction
-	URL string
+	URL string `json:"url,omitempty"`
 	// If there's a comment associated with the interaction
-	Comment string
+	Comment string `json:"comment,omitempty"`
 	// Details of the author
-	Author struct {
-		Name string
-		URL  string
-		Icon []byte
-	}
-	Timestamp time.Time
+	Author    Author    `json:"author"`
+	Timestamp time.Time `json:"timestamp"`
+}
+
+type Author struct {
+	Name      string `json:"name"`
+	URL       string `json:"url"`
+	Avatar    []byte `json:"-"`
+	AvatarURL string `json:"-"`
 }