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fnord
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lib/memory/session.ex
defmodule Memory.Session do
# ----------------------------------------------------------------------------
# Behaviour Implementation
# ----------------------------------------------------------------------------
@behaviour Memory
@impl Memory
def init() do
case get_conversation_pid() do
{:ok, _pid} -> :ok
error -> error
end
end
@impl Memory
def list() do
with {:ok, memories} <- get_conversation_memory() do
titles = Enum.map(memories, & &1.title)
{:ok, titles}
end
end
@impl Memory
def exists?(title) when is_binary(title) do
with {:ok, memories} <- get_conversation_memory() do
Enum.any?(memories, fn %Memory{title: t} -> t == title end)
else
_ -> false
end
end
@impl Memory
def read(title) when is_binary(title) do
with {:ok, memories} <- get_conversation_memory() do
memories
|> Enum.find(fn %Memory{title: t} -> t == title end)
|> case do
nil -> {:error, :not_found}
mem -> {:ok, mem}
end
end
end
@impl Memory
def save(%Memory{title: title} = memory) do
with {:ok, pid} <- get_conversation_pid(),
{:ok, memories} <- get_conversation_memory() do
updated =
memories
|> Enum.reject(fn %Memory{title: t} -> t == title end)
|> Kernel.++([memory])
Services.Conversation.put_memory(pid, updated)
:ok
end
end
@impl Memory
def forget(title) when is_binary(title) do
with {:ok, pid} <- get_conversation_pid(),
{:ok, memories} <- get_conversation_memory() do
updated = Enum.reject(memories, fn %Memory{title: t} -> t == title end)
Services.Conversation.put_memory(pid, updated)
:ok
end
end
@impl Memory
def is_available?() do
case get_conversation_pid() do
{:ok, _pid} -> true
_ -> false
end
end
# ----------------------------------------------------------------------------
# Internals
# ----------------------------------------------------------------------------
defp get_conversation_pid() do
Services.Globals.get_env(:fnord, :current_conversation)
|> case do
nil -> {:error, :no_conversation_set}
pid when is_pid(pid) -> {:ok, pid}
_ -> {:error, :invalid_conversation}
end
end
defp get_conversation_memory() do
with {:ok, pid} <- get_conversation_pid() do
{:ok, Services.Conversation.get_memory(pid)}
end
end
end