feat: Add Redis Chat Memory (#3832)

* feat: Add Redis Chat Memory

* [autofix.ci] apply automated fixes

* [autofix.ci] apply automated fixes (attempt 2/3)

* Refactor password handling in RedisIndexChatMemory to use a local variable

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Gabriel Luiz Freitas Almeida <[email protected]>

src/backend/base/langflow/components/memories/RedisChatMemory.py

@@ -0,0 +1,43 @@
+from urllib import parse
+
+from langchain_community.chat_message_histories.redis import RedisChatMessageHistory
+
+from langflow.base.memory.model import LCChatMemoryComponent
+from langflow.field_typing import BaseChatMessageHistory
+from langflow.inputs import IntInput, MessageTextInput, SecretStrInput, StrInput
+
+
+class RedisIndexChatMemory(LCChatMemoryComponent):
+    display_name = "Redis Chat Memory"
+    description = "Retrieves and store chat messages from Redis."
+    name = "RedisChatMemory"
+    icon = "Redis"
+
+    inputs = [
+        StrInput(
+            name="host", display_name="hostname", required=True, value="localhost", info="IP address or hostname."
+        ),
+        IntInput(name="port", display_name="port", required=True, value=6379, info="Redis Port Number."),
+        StrInput(name="database", display_name="database", required=True, value="0", info="Redis database."),
+        MessageTextInput(
+            name="username", display_name="Username", value="", info="The Redis user name.", advanced=True
+        ),
+        SecretStrInput(
+            name="password", display_name="Password", value="", info="The password for username.", advanced=True
+        ),
+        StrInput(name="key_prefix", display_name="Key prefix", info="Key prefix.", advanced=True),
+        MessageTextInput(
+            name="session_id", display_name="Session ID", info="Session ID for the message.", advanced=True
+        ),
+    ]
+
+    def build_message_history(self) -> BaseChatMessageHistory:
+        kwargs = {}
+        password: str | None = self.password
+        if self.key_prefix:
+            kwargs["key_prefix"] = self.key_prefix
+        if password is not None and password != "":
+            password = parse.quote_plus(password)
+
+        url = f"redis://{self.username}:{self.password}@{self.host}:{self.port}/{self.database}"
+        return RedisChatMessageHistory(session_id=self.session_id, url=url, **kwargs)