big update: added reactions, groups, media share

server/internal/api/reactions.go

@@ -0,0 +1,93 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+)
+
+func (h *apiHandler) addReaction(w http.ResponseWriter, r *http.Request) {
+	userID, _ := userIDFrom(r.Context())
+	convID, msgID, ok := h.parseMessagePath(w, r)
+	if !ok {
+		return
+	}
+	var req struct {
+		Emoji string `json:"emoji"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid json")
+		return
+	}
+	if len(req.Emoji) == 0 || len(req.Emoji) > 32 {
+		writeError(w, http.StatusBadRequest, "emoji must be 1-32 chars")
+		return
+	}
+
+	if err := h.store.AddReaction(r.Context(), msgID, userID, req.Emoji); err != nil {
+		writeError(w, http.StatusInternalServerError, "internal server error")
+		return
+	}
+	h.hub.PublishReactionChanged(convID, msgID, userID, req.Emoji, true)
+	h.writeMessageWithReactions(w, r, convID, msgID)
+}
+
+func (h *apiHandler) removeReaction(w http.ResponseWriter, r *http.Request) {
+	userID, _ := userIDFrom(r.Context())
+	convID, msgID, ok := h.parseMessagePath(w, r)
+	if !ok {
+		return
+	}
+	emoji := r.PathValue("emoji")
+	if emoji == "" {
+		writeError(w, http.StatusBadRequest, "emoji is required")
+		return
+	}
+
+	if err := h.store.RemoveReaction(r.Context(), msgID, userID, emoji); err != nil {
+		writeError(w, http.StatusInternalServerError, "internal server error")
+		return
+	}
+	h.hub.PublishReactionChanged(convID, msgID, userID, emoji, false)
+	h.writeMessageWithReactions(w, r, convID, msgID)
+}
+
+func (h *apiHandler) parseMessagePath(w http.ResponseWriter, r *http.Request) (convID, msgID int64, ok bool) {
+	userID, _ := userIDFrom(r.Context())
+	convID, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
+	if err != nil || convID <= 0 {
+		writeError(w, http.StatusBadRequest, "invalid conversation id")
+		return 0, 0, false
+	}
+	msgID, err = strconv.ParseInt(r.PathValue("msg_id"), 10, 64)
+	if err != nil || msgID <= 0 {
+		writeError(w, http.StatusBadRequest, "invalid message id")
+		return 0, 0, false
+	}
+	if member, err := h.store.IsMember(r.Context(), convID, userID); err != nil || !member {
+		writeError(w, http.StatusForbidden, "not a member")
+		return 0, 0, false
+	}
+	belongs, err := h.store.MessageBelongsToConversation(r.Context(), convID, msgID)
+	if err != nil || !belongs {
+		writeError(w, http.StatusNotFound, "message not found")
+		return 0, 0, false
+	}
+	return convID, msgID, true
+}
+
+func (h *apiHandler) writeMessageWithReactions(w http.ResponseWriter, r *http.Request, convID, msgID int64) {
+	msg, err := h.store.GetMessageByID(r.Context(), msgID)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "internal server error")
+		return
+	}
+	msgs := []messageJSON{toMessageJSON(msg)}
+	reactions, err := h.store.ReactionsForMessages(r.Context(), []int64{msgID})
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "internal server error")
+		return
+	}
+	attachReactions(msgs, reactions)
+	writeJSON(w, http.StatusOK, msgs[0])
+}