Initial Python rewrite

src.bak/main/java/com/example/dto/dialogflow/conversation/ConversationSessionDTO.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2025 Google. This software is provided as-is, without warranty or representation for any use or purpose. 
+ * Your use of it is subject to your agreement with Google.
+ */
+
+package com.example.dto.dialogflow.conversation;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import java.time.Instant;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(Include.NON_NULL)
+public record ConversationSessionDTO(
+    String sessionId,
+    String userId,
+    String telefono,
+    Instant createdAt,
+    Instant lastModified,
+    String lastMessage,
+    String pantallaContexto
+) {
+    public ConversationSessionDTO(String sessionId, String userId, String telefono, Instant createdAt, Instant lastModified, String lastMessage, String pantallaContexto) {
+        this.sessionId = sessionId;
+        this.userId = userId;
+        this.telefono = telefono;
+        this.createdAt = createdAt;
+        this.lastModified = lastModified;
+        this.lastMessage = lastMessage;
+        this.pantallaContexto = pantallaContexto;
+    }
+
+    public static ConversationSessionDTO create(String sessionId, String userId, String telefono) {
+        Instant now = Instant.now();
+        return new ConversationSessionDTO(sessionId, userId, telefono, now, now, null, null);
+    }
+
+    public ConversationSessionDTO withLastMessage(String lastMessage) {
+        return new ConversationSessionDTO(this.sessionId, this.userId, this.telefono, this.createdAt, Instant.now(), lastMessage, this.pantallaContexto);
+    }
+
+    public ConversationSessionDTO withTelefono(String newTelefono) {
+        if (newTelefono != null && !newTelefono.equals(this.telefono)) {
+            return new ConversationSessionDTO(this.sessionId, this.userId, newTelefono, this.createdAt, this.lastModified, this.lastMessage, this.pantallaContexto);
+        }
+        return this;
+    }
+
+    public ConversationSessionDTO withPantallaContexto(String pantallaContexto) {
+        return new ConversationSessionDTO(this.sessionId, this.userId, this.telefono, this.createdAt, this.lastModified, this.lastMessage, pantallaContexto);
+    }
+}