281 lines
7.7 KiB
Go
281 lines
7.7 KiB
Go
package microblog
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import (
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_ "embed"
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"encoding/json"
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"fmt"
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"gemini_site/internal/pocketbase"
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"log/slog"
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"regexp"
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"strconv"
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"strings"
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"time"
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gemini "github.com/kulak/gemini"
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)
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type source string
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const (
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sourcePleroma source = "pleroma"
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sourceBlueSky source = "blue_sky"
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sourceMastodon source = "mastodon"
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sourcePixelfed source = "pixelfed"
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sourceNostr source = "nostr"
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)
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// Post represents a single blog post
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type post struct {
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ID string
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RemoteID string
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Content string
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// TODO: add support for images, must extend the pocketbase query
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// Images []string
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Timestamp time.Time
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Source source
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}
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// PBPost represents a microblog post from PocketBase
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type pbPost struct {
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ID string `json:"id"`
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RemoteID string `json:"remoteId"`
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Source Source `json:"source"`
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FullPost json.RawMessage `json:"fullPost"`
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Posted string `json:"posted"`
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}
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type nostrPost struct {
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Content string `json:"content"`
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}
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// MicroBlog manages blog posts
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type MicroBlog struct {
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pbClient *pocketbase.PocketBaseClient
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}
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// NewMicroBlog creates a new microblog instance
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func NewMicroBlog(pbClient *pocketbase.PocketBaseClient) *MicroBlog {
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mb := &MicroBlog{
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pbClient: pbClient,
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}
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return mb
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}
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// // Add some sample posts
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// mb.addSamplePosts()
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// return mb
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// }
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// addSamplePosts adds some initial content
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// func (mb *MicroBlog) addSamplePosts() {
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// samplePosts := []Post{
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// {
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// ID: "1",
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// Title: "Welcome to the Gemini Microblog",
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// Content: "This is the first post on our Gemini-powered microblog! It's simple, fast, and distraction-free.",
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// Author: "Admin",
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// Timestamp: time.Now().Add(-2 * time.Hour),
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// },
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// {
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// ID: "2",
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// Title: "The Beauty of Simplicity",
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// Content: "Gemini protocol encourages us to focus on content over presentation. This microblog embodies that philosophy.",
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// Author: "Admin",
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// Timestamp: time.Now().Add(-1 * time.Hour),
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// },
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// }
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// mb.posts = append(mb.posts, samplePosts...)
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// }
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// AddPost adds a new post to the blog
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// func (mb *MicroBlog) AddPost(title, content, author string) string {
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// id := fmt.Sprintf("%d", time.Now().Unix())
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// post := Post{
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// ID: id,
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// Title: title,
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// Content: content,
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// Author: author,
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// Timestamp: time.Now(),
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// }
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// mb.posts = append(mb.posts, post)
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// return id
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// }
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// GetPost retrieves a post by ID
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//
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// func (mb *MicroBlog) GetPost(id string) (*Post, bool) {
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// for _, post := range mb.posts {
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// if post.ID == id {
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// return &post, true
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// }
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// }
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// return nil, false
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// }
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func transformNostrPost(p pbPost) post {
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var nostrPost nostrPost
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if err := json.Unmarshal(p.FullPost, &nostrPost); err != nil {
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slog.Error("Problem unmarshalling nostr post", "error", err)
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return post{}
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}
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content := nostrPost.Content
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content = strings.ReplaceAll(content, "#", "\\#")
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// content = strings.ReplaceAll(content, "\t", "\\t")
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return post{
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ID: p.ID,
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RemoteID: p.RemoteID,
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Content: content,
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Timestamp: time.Now(),
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Source: source(p.Source),
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}
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}
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// GetRecentPosts returns the most recent posts
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func (mb *MicroBlog) GetRecentPosts(limit int, page int) ([]post, error) {
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res, err := mb.pbClient.GetList("micro_blog_posts", page, limit, "-posted")
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if err != nil {
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return nil, fmt.Errorf("failed to fetch posts from pocketbase: %w", err)
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}
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var rawPosts []pbPost
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if err := json.Unmarshal(res.Items, &rawPosts); err != nil {
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return nil, fmt.Errorf("failed to decode response: %w", err)
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}
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slog.Info("Posts from pocketbase", "rawPosts", rawPosts)
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var filteredPosts []post
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for _, p := range rawPosts {
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if p.Source == SourceNostr {
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filteredPosts = append(filteredPosts, transformNostrPost(p))
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// var nostrPost nostrPost
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// if err := json.Unmarshal(p.FullPost, &nostrPost); err != nil {
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// slog.Error("Problem unmarshalling nostr post", "error", err)
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// continue
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// }
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// filteredPosts = append(filteredPosts, post{
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// ID: p.ID,
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// RemoteID: p.RemoteID,
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// Content: nostrPost.Content,
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// Timestamp: time.Now(),
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// })
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continue
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}
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}
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return filteredPosts, nil
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}
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func replaceLinks(content string) string {
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// Regex: ^(https?://\S+)
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// ^ : start of line
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// https? : http or https
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// :// : literal
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// \S+ : one or more non-whitespace characters
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re := regexp.MustCompile(`(?m)^(https?://\S+)`)
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// Replace each match with "=> <url>"
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return re.ReplaceAllStringFunc(content, func(match string) string {
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return "=> " + match
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})
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}
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// HandleBlogRequest handles Gemini requests for the microblog
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func (mb *MicroBlog) HandleBlogRequest(w gemini.ResponseWriter, req *gemini.Request) {
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path := req.URL.Path
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switch {
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case path == "/microblog" || path == "/microblog/":
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mb.serveIndex(w, req, 1)
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case strings.HasPrefix(path, "/microblog/page/"):
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pageNum := strings.TrimPrefix(path, "/microblog/page/")
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num, err := strconv.Atoi(pageNum)
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if err != nil {
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w.WriteStatusMsg(gemini.StatusBadRequest, "Invalid page number")
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return
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}
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mb.serveIndex(w, req, num)
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// case strings.HasPrefix(path, "/microblog/post/"):
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// postID := strings.TrimPrefix(path, "/microblog/post/")
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// mb.servePost(w, req, postID)
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default:
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w.WriteStatusMsg(gemini.StatusNotFound, "Page not found")
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}
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}
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func drawPost(builder *strings.Builder, p post) {
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builder.WriteString("+------------------------------------------+\n")
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content := replaceLinks(p.Content)
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builder.WriteString(content)
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builder.WriteString("\n")
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builder.WriteString(fmt.Sprintf("source: %s, id: %s...\n", p.Source, p.RemoteID[:10]))
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builder.WriteString("+------------------------------------------+\n\n\n")
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// builder.WriteString(fmt.Sprintf("=> /blog/post/%s %s\n", p.ID, p.Title))
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// builder.WriteString(fmt.Sprintf(" By %s on %s\n\n",
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// p.Timestamp.Format("2006-01-02 15:04")))
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}
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//go:embed microblog.gmi
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var pageContnet string
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// serveBlogIndex serves the main blog page with recent posts
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func (mb *MicroBlog) serveIndex(w gemini.ResponseWriter, req *gemini.Request, pageNum int) {
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w.WriteStatusMsg(gemini.StatusSuccess, "text/gemini")
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var content strings.Builder
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// content.WriteString("# Gemini Microblog\n\n")
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// content.WriteString("Here are my microblog posts from various plantforms\n")
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// Read and include the contents of ../../pages/microblog.gmi
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if pageNum == 1 {
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content.Write([]byte(pageContnet))
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content.WriteString("\n")
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}
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posts, err := mb.GetRecentPosts(20, pageNum)
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if err != nil {
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content.WriteString("Error fetching posts: " + err.Error() + "\n\n")
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}
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if len(posts) == 0 {
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content.WriteString("No posts found.\n\n")
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} else {
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content.WriteString("## Posts\n\n")
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for _, post := range posts {
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drawPost(&content, post)
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}
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}
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content.WriteString("## Nav\n\n")
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// content.WriteString("=> /blog/new Write a new post\n")
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content.WriteString(fmt.Sprintf("=> /microblog/page/%d Next page\n", pageNum+1))
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content.WriteString("=> / Back to home\n")
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w.WriteBody([]byte(content.String()))
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}
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// servePost serves a single blog post
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// func (mb *MicroBlog) servePost(w gemini.ResponseWriter, req *gemini.Request, postID string) {
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// post, found := mb.GetPost(postID)
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// if !found {
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// w.WriteStatusMsg(gemini.StatusNotFound, "Post not found")
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// return
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// }
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// w.WriteStatusMsg(gemini.StatusSuccess, "text/gemini")
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// var content strings.Builder
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// content.WriteString(fmt.Sprintf("# %s\n\n", post.Title))
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// content.WriteString(fmt.Sprintf("By %s on %s\n\n",
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// post.Author,
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// post.Timestamp.Format("2006-01-02 15:04")))
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// content.WriteString("---\n\n")
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// content.WriteString(post.Content)
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// content.WriteString("\n\n---\n\n")
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// content.WriteString("=> /blog Back to blog\n")
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// content.WriteString("=> / Back to home\n")
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// w.WriteBody([]byte(content.String()))
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// }
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