Update conversations.php

conversations.php

@@ -2113,6 +2113,32 @@
                         messages = data;
                     }
 
+                    // Filtrar mensajes vacíos (sin texto y sin media) para evitar que aparezcan placeholders "[Mensaje vacío]"
+                    if (Array.isArray(messages) && messages.length > 0) {
+                        const beforeCount = messages.length;
+                        messages = messages.filter(m => {
+                            const content = (typeof m.content !== 'undefined' && m.content !== null) ? String(m.content).trim() : '';
+                            const hasContent = content.length > 0;
+                            const hasMedia = !!(m.local_thumb || m.local_file || m.media_url_external || m.media_url);
+                            const nonText = m.message_type && m.message_type !== 'text';
+                            if (!hasContent && !hasMedia && !nonText) {
+                                // Drop purely empty text message
+                                if (console && console.warn) console.warn('Dropping empty message in pagination:', m && (m.id || m.message_id), m && m.created_at);
+                                return false;
+                            }
+                            return true;
+                        });
+                        const dropped = beforeCount - messages.length;
+                        if (dropped > 0) {
+                            // Indicar de forma no intrusiva en caso de debug o visibilidad limitada
+                            if (typeof showAlert === 'function') {
+                                showAlert(dropped + ' mensajes vacíos omitidos', 'warning');
+                            } else {
+                                if (console && console.info) console.info('Omitidos ' + dropped + ' mensajes vacíos durante paginación');
+                            }
+                        }
+                    }
+
                     // Guard: cuando paginamos (initial=false) y la respuesta no trae mensajes,
                     // no reemplazar ni limpiar la conversación actual; solo indicar que no hay más.
                     if (!initial && Array.isArray(messages) && messages.length === 0) {
@@ -2127,6 +2153,25 @@
                     if (initial) {
                         this.conversations = messages;
                     } else {
+                        // Evitar introducir duplicados que ya existen en la vista actual
+                        try {
+                            const existingKeys = new Set(this.conversations.map(m => this.messageKey(m)));
+                            const beforeLen = messages.length;
+                            messages = messages.filter(m => {
+                                const k = this.messageKey(m);
+                                const seen = existingKeys.has(k);
+                                if (!seen) existingKeys.add(k); // mark as seen to avoid duplicates within the batch
+                                else {
+                                    if (console && console.debug) console.debug('Skipping duplicate message from server (already in view)', m && (m.id || m.message_id), m && m.created_at);
+                                }
+                                return !seen;
+                            });
+                            const dropped = beforeLen - messages.length;
+                            if (dropped > 0) {
+                                if (console && console.info) console.info(`Omitted ${dropped} messages because they already exist in view`);
+                            }
+                        } catch (e) { console.warn('duplicate filtering failed', e); }
+
                         // Prepend mensajes antiguos
                         this.conversations = messages.concat(this.conversations);
                     }
@@ -2472,6 +2517,16 @@
                 } catch (e) { console.warn('removeNoMoreMessagesHint failed', e); }
             }
 
+            // Helper: generate stable key for a message to detect duplicates
+            messageKey(m) {
+                if (!m) return '';
+                const mid = m.message_id || m.id || '';
+                if (mid) return String(mid);
+                const partMedia = m.media_url || m.media_url_external || m.local_file || m.local_thumb || (m.content || '');
+                const ts = m.created_at ? String(Math.floor(new Date(m.created_at).getTime() / 1000)) : '';
+                return `${m.direction||'?'}|${m.message_type||m.media_type||'text'}|${partMedia}|${ts}`;
+            }
+
             // Initialize recording handlers (so mic works before openConversation) and helper to manage recording state
             initRecordingHandlers() {
                 if (this._recordingHandlersInitialized) return;