Lots of progress on public AP interface

- Read handler for create activities (notes only so far)
- Read handler for note objects
- Structure laid out for other objects, activities and collections
- DB structure for activities created
- Update access logging

TODO: Create collections type in DB to describe a collection group

web/public/api/activitypub/objectNote.go

@@ -1 +1,102 @@
 package activitypub
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+
+	webutils "git.mstar.dev/mstar/goutils/http"
+	"github.com/rs/zerolog/hlog"
+	"gorm.io/gorm"
+
+	"git.mstar.dev/mstar/linstrom/activitypub"
+	"git.mstar.dev/mstar/linstrom/config"
+	"git.mstar.dev/mstar/linstrom/storage-new"
+	"git.mstar.dev/mstar/linstrom/storage-new/dbgen"
+)
+
+type objectNoteOut struct {
+	// Context should be set, if needed, by the endpoint handler
+	Context any `json:"@context,omitempty"`
+
+	// Attributes below set from storage
+
+	Id           string    `json:"id"`
+	Type         string    `json:"type"`
+	Summary      *string   `json:"summary"`
+	InReplyTo    *string   `json:"inReplyTo"`
+	Published    time.Time `json:"published"`
+	Url          string    `json:"url"`
+	AttributedTo string    `json:"attributedTo"`
+	To           []string  `json:"to"`
+	// CC               []string  `json:"cc"` // FIXME: Uncomment once followers collection implemented
+	Sensitive        bool    `json:"sensitive"`
+	AtomUri          string  `json:"atomUri"`
+	InReplyToAtomUri *string `json:"inReplyToAtomUri"`
+	// Conversation     string `json:"conversation"` // FIXME: Uncomment once understood what this field wants
+	Content string `json:"content"`
+	// ContentMap  map[string]string `json:"content_map"` // TODO: Uncomment once/if support for multiple languages available
+	// Attachments []string          `json:"attachments"` // FIXME: Change this to document type
+	// Tags        []string          `json:"tags"`        // FIXME: Change this to hashtag type
+	// Replies     any               `json:"replies"`     // FIXME: Change this to collection type embedding first page
+	// Likes       any               `json:"likes"`       // FIXME: Change this to collection
+	// Shares      any               `json:"shares"`      // FIXME: Change this to collection, is boosts
+}
+
+func objectNote(w http.ResponseWriter, r *http.Request) {
+	id := r.PathValue("id")
+	log := hlog.FromRequest(r)
+	note, err := noteFromStorage(r.Context(), id)
+	switch err {
+	case gorm.ErrRecordNotFound:
+		webutils.ProblemDetailsStatusOnly(w, http.StatusNotFound)
+		return
+	case nil:
+		note.Context = activitypub.BaseLdContext
+		data, err := json.Marshal(note)
+		if err != nil {
+			log.Error().Err(err).Any("activity", note).Msg("Failed to marshal create activity")
+			webutils.ProblemDetailsStatusOnly(w, http.StatusInternalServerError)
+			return
+		}
+		w.Header().Add("Content-Type", "application/activity+json")
+		fmt.Fprint(w, string(data))
+	default:
+		if storage.HandleReconnectError(err) {
+			log.Error().Err(err).Msg("Connection failed, restart attempt started")
+		} else {
+			log.Error().Err(err).Msg("Failed to get create activity from db")
+		}
+		webutils.ProblemDetailsStatusOnly(w, http.StatusInternalServerError)
+	}
+}
+
+func noteFromStorage(ctx context.Context, id string) (*objectNoteOut, error) {
+	note, err := dbgen.Note.Where(dbgen.Note.ID.Eq(id)).Preload(dbgen.Note.Creator).First()
+	if err != nil {
+		return nil, err
+	}
+	data := &objectNoteOut{
+		Id:           config.GlobalConfig.General.GetFullPublicUrl() + "/api/activitypub/note/" + id,
+		Type:         "Note",
+		Published:    note.CreatedAt,
+		AttributedTo: config.GlobalConfig.General.GetFullPublicUrl() + "/api/activitypub/user/" + note.CreatorId,
+		Content:      note.RawContent, // FIXME: Escape content
+		Url:          config.GlobalConfig.General.GetFullPublicUrl() + "/@" + note.Creator.Username + "/" + id,
+		To: []string{
+			"https://www.w3.org/ns/activitystreams#Public",
+		}, // FIXME: Replace with proper targets, not always public
+		AtomUri: config.GlobalConfig.General.GetFullPublicUrl() + "/api/activitypub/object/" + id,
+	}
+	if note.RepliesTo.Valid {
+		data.InReplyTo = &note.RepliesTo.String
+		data.InReplyToAtomUri = &note.RepliesTo.String
+	}
+	if note.ContentWarning.Valid {
+		data.Summary = &note.ContentWarning.String
+		data.Sensitive = true
+	}
+	return data, nil
+}