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|
package bskybot
import (
"errors"
"fmt"
"net/url"
"strings"
"time"
"github.com/bluesky-social/indigo/api/atproto"
appbsky "github.com/bluesky-social/indigo/api/bsky"
lexutil "github.com/bluesky-social/indigo/lex/util"
"github.com/bluesky-social/indigo/util"
)
var FeedPost_Embed appbsky.FeedPost_Embed
type Facet_Type int
const (
Facet_Link Facet_Type = iota + 1
Facet_Mention
Facet_Tag
)
// construct the post
type PostBuilder struct {
Text string
Facet []Facet
Embed Embed
Time time.Time
Reply *appbsky.FeedPost_ReplyRef
}
type Facet struct {
Ftype Facet_Type
Value string
T_facet string
}
type Embed struct {
Link Link
Images []Image
UploadedImages []lexutil.LexBlob
}
type Link struct {
Title string
Uri url.URL
Description string
}
type Image struct {
Title string
Uri url.URL
}
// Create a simple post with text
func NewPostBuilder(text string) PostBuilder {
return PostBuilder{
Text: text,
Facet: []Facet{},
}
}
// Create a Richtext Post with facests
func (pb PostBuilder) WithFacet(ftype Facet_Type, value string, text string) PostBuilder {
pb.Facet = append(pb.Facet, Facet{
Ftype: ftype,
Value: value,
T_facet: text,
})
return pb
}
// Create a Post with external links
func (pb PostBuilder) WithExternalLink(title string, link url.URL, description string) PostBuilder {
pb.Embed.Link.Title = title
pb.Embed.Link.Uri = link
pb.Embed.Link.Description = description
return pb
}
// Create a Post with images
func (pb PostBuilder) WithImages(blobs []lexutil.LexBlob, images []Image) PostBuilder {
pb.Embed.Images = images
pb.Embed.UploadedImages = blobs
return pb
}
// Create a post in reply to another post
func (pb PostBuilder) InReplyTo(post appbsky.FeedPost, actorID, cid, rkey string) PostBuilder {
parent := atproto.RepoStrongRef{
LexiconTypeID: "app.bsky.feed.post",
Uri: fmt.Sprintf("at://%s/app.bsky.feed.post/%s", actorID, rkey),
Cid: cid,
}
root := parent
if post.Reply != nil {
root = *post.Reply.Root
}
pb.Reply = &appbsky.FeedPost_ReplyRef{
Parent: &parent,
Root: &root,
}
return pb
}
func (pb PostBuilder) AtTime(t time.Time) PostBuilder {
pb.Time = t
return pb
}
// Build the request
func (pb PostBuilder) Build() (appbsky.FeedPost, error) {
post := appbsky.FeedPost{}
post.Text = pb.Text
post.LexiconTypeID = "app.bsky.feed.post"
if pb.Time.IsZero() {
pb.Time = time.Now().UTC()
}
post.CreatedAt = pb.Time.UTC().Format(util.ISO8601)
post.Reply = pb.Reply
// RichtextFacet Section
// https://docs.bsky.app/docs/advanced-guides/post-richtext
Facets := []*appbsky.RichtextFacet{}
for _, f := range pb.Facet {
facet := &appbsky.RichtextFacet{}
features := []*appbsky.RichtextFacet_Features_Elem{}
feature := &appbsky.RichtextFacet_Features_Elem{}
switch f.Ftype {
case Facet_Link:
{
feature = &appbsky.RichtextFacet_Features_Elem{
RichtextFacet_Link: &appbsky.RichtextFacet_Link{
LexiconTypeID: f.Ftype.String(),
Uri: f.Value,
},
}
}
case Facet_Mention:
{
feature = &appbsky.RichtextFacet_Features_Elem{
RichtextFacet_Mention: &appbsky.RichtextFacet_Mention{
LexiconTypeID: f.Ftype.String(),
Did: f.Value,
},
}
}
case Facet_Tag:
{
feature = &appbsky.RichtextFacet_Features_Elem{
RichtextFacet_Tag: &appbsky.RichtextFacet_Tag{
LexiconTypeID: f.Ftype.String(),
Tag: f.Value,
},
}
}
}
features = append(features, feature)
facet.Features = features
ByteStart, ByteEnd, err := findSubstring(post.Text, f.T_facet)
if err != nil {
return post, fmt.Errorf("unable to find the substring: %v , %v", f.T_facet, err)
}
index := &appbsky.RichtextFacet_ByteSlice{
ByteStart: int64(ByteStart),
ByteEnd: int64(ByteEnd),
}
facet.Index = index
Facets = append(Facets, facet)
}
post.Facets = Facets
// Embed Section (either external links or images)
// As of now it allows only one Embed type per post:
// https://github.com/bluesky-social/indigo/blob/main/api/bsky/feedpost.go
if pb.Embed.Link != (Link{}) {
FeedPost_Embed.EmbedExternal = &appbsky.EmbedExternal{
LexiconTypeID: "app.bsky.embed.external",
External: &appbsky.EmbedExternal_External{
Title: pb.Embed.Link.Title,
Uri: pb.Embed.Link.Uri.String(),
Description: pb.Embed.Link.Description,
},
}
} else {
if len(pb.Embed.Images) != 0 && len(pb.Embed.Images) == len(pb.Embed.UploadedImages) {
EmbedImages := appbsky.EmbedImages{
LexiconTypeID: "app.bsky.embed.images",
Images: make([]*appbsky.EmbedImages_Image, len(pb.Embed.Images)),
}
for i, img := range pb.Embed.Images {
EmbedImages.Images[i] = &appbsky.EmbedImages_Image{
Alt: img.Title,
Image: &pb.Embed.UploadedImages[i],
}
}
FeedPost_Embed.EmbedImages = &EmbedImages
}
}
// avoid error when trying to marshal empty field (*bsky.FeedPost_Embed)
if len(pb.Embed.Images) != 0 || pb.Embed.Link.Title != "" {
post.Embed = &FeedPost_Embed
}
return post, nil
}
func (f Facet_Type) String() string {
switch f {
case Facet_Link:
return "app.bsky.richtext.facet#link"
case Facet_Mention:
return "app.bsky.richtext.facet#mention"
case Facet_Tag:
return "app.bsky.richtext.facet#tag"
default:
return "Unknown"
}
}
func findSubstring(s, substr string) (int, int, error) {
index := strings.Index(s, substr)
if index == -1 {
return 0, 0, errors.New("substring not found")
}
return index, index + len(substr), nil
}
|
