| 1 | package tinyclient |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "fmt" |
| 7 | "html/template" |
| 8 | "net/http" |
| 9 | "net/url" |
| 10 | "strconv" |
| 11 | "strings" |
| 12 | "time" |
| 13 | |
| 14 | event "github.com/FelineStateMachine/tinyrelay/protocol/nostr" |
| 15 | ) |
| 16 | |
| 17 | func (a *App) publicFeed(ctx context.Context, tab, actor string, values url.Values) ([]any, error) { |
| 18 | if (tab == "inbox" || tab == "outbox" ) && strings.TrimSpace(actor) == "" { |
| 19 | return nil, &publicAuthError{} |
| 20 | } |
| 21 | var filter map[string]any |
| 22 | switch tab { |
| 23 | case "search" : |
| 24 | q := strings.TrimSpace(values.Get("q" )) |
| 25 | if q == "" { |
| 26 | return nil, nil |
| 27 | } |
| 28 | filter = map[string]any{"search" : q, "limit" : 50} |
| 29 | case "inbox" : |
| 30 | filter = map[string]any{"#p" : []string{actor}, "limit" : 50} |
| 31 | case "outbox" : |
| 32 | filter = map[string]any{"authors" : []string{actor}, "limit" : 50} |
| 33 | case "articles" : |
| 34 | filter = map[string]any{"kinds" : []int{30023}, "limit" : 50} |
| 35 | case "sites" : |
| 36 | filter = map[string]any{"kinds" : []int{kindSite, kindNamedSite}, "limit" : 100} |
| 37 | default: |
| 38 | return nil, nil |
| 39 | } |
| 40 | applyFeedFilters(filter, values) |
| 41 | raw, err := json.Marshal(filter) |
| 42 | if err != nil { |
| 43 | return nil, err |
| 44 | } |
| 45 | result, err := a.backend.Query(ctx, "queryevents" , []json.RawMessage{raw}, actor) |
| 46 | if err != nil { |
| 47 | return nil, err |
| 48 | } |
| 49 | encoded, err := json.Marshal(result) |
| 50 | if err != nil { |
| 51 | return nil, err |
| 52 | } |
| 53 | var feed []any |
| 54 | if err := json.Unmarshal(encoded, &feed); err != nil { |
| 55 | return []any{}, nil |
| 56 | } |
| 57 | return feed, nil |
| 58 | } |
| 59 | |
| 60 | // applyFeedFilters narrows a feed by the panel filters: kinds, author, since. |
| 61 | // "all" removes the kind restriction; unknown values are ignored. |
| 62 | func applyFeedFilters(filter map[string]any, values url.Values) { |
| 63 | switch kinds := strings.TrimSpace(values.Get("kinds" )); { |
| 64 | case kinds == "all" : |
| 65 | delete(filter, "kinds" ) |
| 66 | case kinds != "" : |
| 67 | var list []int |
| 68 | for _, part := range strings.Split(kinds, "," ) { |
| 69 | if kind, err := strconv.Atoi(strings.TrimSpace(part)); err == nil { |
| 70 | list = append(list, kind) |
| 71 | } |
| 72 | } |
| 73 | if len(list) > 0 { |
| 74 | filter["kinds" ] = list |
| 75 | } |
| 76 | } |
| 77 | if author := strings.ToLower(strings.TrimSpace(values.Get("author" ))); len(author) == 64 { |
| 78 | filter["authors" ] = []string{author} |
| 79 | } |
| 80 | if since := strings.TrimSpace(values.Get("since" )); since != "" { |
| 81 | if parsed, err := time.Parse("2006-01-02" , since); err == nil { |
| 82 | filter["since" ] = parsed.Unix() |
| 83 | } |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | // siteRows turns site manifest events into rows with the host each site is |
| 88 | // served from, using the same labels the daemon uses for site hosts. |
| 89 | func (a *App) siteRows(feed []any) []any { |
| 90 | base, err := url.Parse(a.backend.URL()) |
| 91 | if err != nil { |
| 92 | return nil |
| 93 | } |
| 94 | rows := make([]any, 0, len(feed)) |
| 95 | for _, item := range feed { |
| 96 | encoded, _ := json.Marshal(item) |
| 97 | var e event.Event |
| 98 | if json.Unmarshal(encoded, &e) != nil { |
| 99 | continue |
| 100 | } |
| 101 | label := siteLabel(e) |
| 102 | if label == "" { |
| 103 | continue |
| 104 | } |
| 105 | scheme := base.Scheme |
| 106 | if scheme == "" || scheme == "ws" { |
| 107 | scheme = "http" |
| 108 | } else if scheme == "wss" { |
| 109 | scheme = "https" |
| 110 | } |
| 111 | rows = append(rows, map[string]any{"id" : e.ID, "kind" : e.Kind, "author" : e.PubKey, "label" : label, "paths" : sitePathCount(e), "created_at" : e.CreatedAt, "url" : scheme + "://" + label + "." + base.Host}) |
| 112 | } |
| 113 | return rows |
| 114 | } |
| 115 | |
| 116 | type publicAuthError struct{} |
| 117 | |
| 118 | func (*publicAuthError) Error() string { return "authentication required" } |
| 119 | |
| 120 | func publicErrorStatus(err error) int { |
| 121 | if _, ok := err.(*publicAuthError); ok { |
| 122 | return http.StatusUnauthorized |
| 123 | } |
| 124 | return http.StatusForbidden |
| 125 | } |
| 126 | |
| 127 | func (a *App) articlesJSON(writer http.ResponseWriter, request *http.Request) { |
| 128 | feed, err := a.publicFeed(request.Context(), "articles" , "" , request.URL.Query()) |
| 129 | if err != nil { |
| 130 | writeJSON(writer, publicErrorStatus(err), map[string]string{"error" : err.Error()}) |
| 131 | return |
| 132 | } |
| 133 | items := make([]map[string]any, 0, len(feed)) |
| 134 | for _, value := range feed { |
| 135 | item, ok := articleItem(value, a.backend.URL()) |
| 136 | if ok { |
| 137 | items = append(items, item) |
| 138 | } |
| 139 | } |
| 140 | writeJSON(writer, http.StatusOK, map[string]any{"version" : "https://jsonfeed.org/version/1" , "title" : a.backend.Slug(), "home_page_url" : a.backend.URL(), "feed_url" : strings.TrimSuffix(a.backend.URL(), "/" ) + "/articles.json" , "items" : items}) |
| 141 | } |
| 142 | |
| 143 | func articleItem(value any, base string) (map[string]any, bool) { |
| 144 | encoded, err := json.Marshal(value) |
| 145 | if err != nil { |
| 146 | return nil, false |
| 147 | } |
| 148 | var event map[string]any |
| 149 | if json.Unmarshal(encoded, &event) != nil { |
| 150 | return nil, false |
| 151 | } |
| 152 | id, _ := event["id" ].(string) |
| 153 | content, _ := event["content" ].(string) |
| 154 | if id == "" { |
| 155 | return nil, false |
| 156 | } |
| 157 | title := strings.TrimSpace(strings.SplitN(content, "\n" , 2)[0]) |
| 158 | if title == "" { |
| 159 | title = "Article " + id[:minInt(12, len(id))] |
| 160 | } |
| 161 | item := map[string]any{"id" : id, "url" : strings.TrimSuffix(base, "/" ) + "/e/" + id, "title" : title, "content_text" : content} |
| 162 | if created, ok := event["created_at" ].(float64); ok && created > 0 { |
| 163 | item["date_published" ] = time.Unix(int64(created), 0).UTC().Format(time.RFC3339) |
| 164 | } |
| 165 | return item, true |
| 166 | } |
| 167 | |
| 168 | func minInt(a, b int) int { |
| 169 | if a < b { |
| 170 | return a |
| 171 | } |
| 172 | return b |
| 173 | } |
| 174 | |
| 175 | func (a *App) pageFeatureEnabled(path string) bool { |
| 176 | if a.backend.Policy().Features.Pages { |
| 177 | return true |
| 178 | } |
| 179 | return !(path == "/social" || path == "/social.json" || path == "/social.xml" || strings.HasPrefix(path, "/social/" ) || path == "/articles.json" || path == "/feed" || path == "/feed.xml" || path == "/articles" || strings.HasPrefix(path, "/e/" ) || strings.HasPrefix(path, "/a/" )) |
| 180 | } |
| 181 | |
| 182 | func (a *App) feed(writer http.ResponseWriter, request *http.Request) { |
| 183 | items, err := a.publicFeed(request.Context(), "articles" , "" , request.URL.Query()) |
| 184 | if err != nil { |
| 185 | http.Error(writer, err.Error(), publicErrorStatus(err)) |
| 186 | return |
| 187 | } |
| 188 | entries := make([]map[string]any, 0, len(items)) |
| 189 | for _, value := range items { |
| 190 | if item, ok := articleItem(value, a.backend.URL()); ok { |
| 191 | entries = append(entries, item) |
| 192 | } |
| 193 | } |
| 194 | a.writeAtom(writer, entries) |
| 195 | } |
| 196 | |
| 197 | func (a *App) writeAtom(writer http.ResponseWriter, items []map[string]any) { |
| 198 | writer.Header().Set("content-type" , "application/atom+xml; charset=utf-8" ) |
| 199 | var out strings.Builder |
| 200 | fmt.Fprintf(&out, `<?xml version="1.0"?><feed xmlns="http://www.w3.org/2005/Atom"><title>%s</title><link href="%s"/>` , template.HTMLEscapeString(a.backend.Slug()), template.HTMLEscapeString(a.backend.URL())) |
| 201 | for _, item := range items { |
| 202 | fmt.Fprintf(&out, `<entry><id>%s</id><title>%s</title><link href="%s"/><content type="text">%s</content></entry>` , template.HTMLEscapeString(fmt.Sprint(item["id" ])), template.HTMLEscapeString(fmt.Sprint(item["title" ])), template.HTMLEscapeString(fmt.Sprint(item["url" ])), template.HTMLEscapeString(fmt.Sprint(item["content_text" ]))) |
| 203 | } |
| 204 | out.WriteString(`</feed>` ) |
| 205 | _, _ = writer.Write([]byte(out.String())) |
| 206 | } |
