Add support for syndication

config.go

@@ -15,8 +15,14 @@ var (
 	MicroblogUrl          string
 	MicroblogToken        string
 	IgnoredWebmentionUrls []string
+	SyndicationTargets    []SyndicationTarget
 )
 
+type SyndicationTarget struct {
+	Uid  string `json:"uid"`
+	Name string `json:"name"`
+}
+
 func init() {
 	// Blog URL (required)
 	blogUrl, err := blogUrl()
@@ -58,6 +64,12 @@ func init() {
 		log.Println(err)
 	}
 	IgnoredWebmentionUrls = ignoredWebmentionUrls
+	// Syndication Targets (optional)
+	syndicationTargets, err := syndicationTargets()
+	if err != nil {
+		log.Println(err)
+	}
+	SyndicationTargets = syndicationTargets
 }
 
 func giteaEndpoint() (string, error) {
@@ -111,7 +123,22 @@ func microblogToken() (string, error) {
 func ignoredWebmentionUrls() ([]string, error) {
 	webmentionIgnored := os.Getenv("WEBMENTION_IGNORED")
 	if len(webmentionIgnored) == 0 {
-		return nil, errors.New("WEBMENTION_IGNORED not set, no URLs are ignored on Webmention sending")
+		return make([]string, 0), errors.New("WEBMENTION_IGNORED not set, no URLs are ignored on Webmention sending")
 	}
 	return strings.Split(webmentionIgnored, ","), nil
 }
+
+func syndicationTargets() ([]SyndicationTarget, error) {
+	syndication := os.Getenv("SYNDICATION")
+	targets := make([]SyndicationTarget, 0)
+	if len(syndication) == 0 {
+		return targets, errors.New("SYNDICATION not set, no targets are returned when querying for syndication targets")
+	}
+	for _, url := range strings.Split(syndication, ",") {
+		targets = append(targets, SyndicationTarget{
+			Uid:  url,
+			Name: url,
+		})
+	}
+	return targets, nil
+}

entry.go

@@ -27,6 +27,7 @@ type Entry struct {
 	replyTitle string
 	likeLink   string
 	likeTitle  string
+	syndicate  []string
 	filename   string
 	location   string
 	token      string
@@ -101,6 +102,13 @@ func createEntryFromValueMap(values map[string][]string) (*Entry, error) {
 		if likeOf, ok := values["like-of"]; ok {
 			entry.likeLink = likeOf[0]
 		}
+		if syndicate, ok := values["mp-syndicate-to"]; ok {
+			entry.syndicate = syndicate
+		} else if syndicates, ok := values["mp-syndicate-to[]"]; ok {
+			entry.syndicate = syndicates
+		} else {
+			entry.syndicate = nil
+		}
 		if token, ok := values["access_token"]; ok {
 			entry.token = "Bearer " + token[0]
 		}
@@ -136,6 +144,9 @@ func createEntryFromMicroformat(mfEntry *MicroformatItem) (*Entry, error) {
 		if len(mfEntry.Properties.LikeOf) == 1 {
 			entry.likeLink = mfEntry.Properties.LikeOf[0]
 		}
+		if len(mfEntry.Properties.MpSyndicateTo) > 0 {
+			entry.syndicate = mfEntry.Properties.MpSyndicateTo
+		}
 		err := computeExtraSettings(entry)
 		if err != nil {
 			return nil, err

microformat.go

@@ -15,4 +15,5 @@ type MicroformatProperties struct {
 	InReplyTo     []string `json:"in-reply-to,omitempty"`
 	LikeOf        []string `json:"like-of,omitempty"`
 	MpSlug        []string `json:"mp-slug,omitempty"`
+	MpSyndicateTo []string `json:"mp-syndicate-to,omitempty"`
 }

micropub.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"net/http"
 	"strconv"
 	"time"
@@ -12,7 +13,13 @@ func HandleMicroPub(w http.ResponseWriter, r *http.Request) {
 		if q := r.URL.Query().Get("q"); q == "syndicate-to" {
 			w.Header().Add("Content-type", "application/json")
 			w.WriteHeader(http.StatusOK)
-			_, _ = w.Write([]byte("[]"))
+			jsonBytes, err := json.Marshal(SyndicationTargets)
+			if err != nil {
+				w.WriteHeader(http.StatusBadRequest)
+				_, _ = w.Write([]byte(err.Error()))
+				return
+			}
+			_, _ = w.Write(jsonBytes)
 			return
 		} else if url := r.URL.Query().Get("url"); q == "source" {
 			limit := r.URL.Query().Get("limit")

post.go

@@ -14,6 +14,7 @@ type HugoFrontmatter struct {
 	Tags        []string                `yaml:"tags,omitempty"`
 	ExternalURL string                  `yaml:"externalURL,omitempty"`
 	Indieweb    HugoFrontmatterIndieweb `yaml:"indieweb,omitempty"`
+	Syndicate   []string                `yaml:"syndicate,omitempty"`
 }
 
 type HugoFrontmatterIndieweb struct {
@@ -49,6 +50,7 @@ func writeFrontMatter(entry *Entry) (frontmatter string, err error) {
 				Title: entry.likeTitle,
 			},
 		},
+		Syndicate: entry.syndicate,
 	}
 	yamlBytes, err := yaml.Marshal(&writeFrontmatter)
 	if err != nil {
@@ -108,6 +110,9 @@ func readFrontMatter(frontmatter string, entry *Entry) (err error) {
 	if len(parsedFrontmatter.Indieweb.Like.Title) > 0 {
 		entry.replyTitle = parsedFrontmatter.Indieweb.Like.Title
 	}
+	if len(parsedFrontmatter.Syndicate) > 0 {
+		entry.syndicate = parsedFrontmatter.Syndicate
+	}
 	return
 }