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lib/memory/project.ex
defmodule Memory.Project do
@moduledoc """
Project-level memory storage implementation for the `Memory` behaviour.
Project memory uses the shared file-backed store in `Memory.FileStore`. This
module primarily resolves the current project and derives the runtime storage
paths for that shared store.
"""
# ----------------------------------------------------------------------------
# Behaviour Implementation
# ----------------------------------------------------------------------------
@behaviour Memory
@impl Memory
def init() do
with {:ok, project} <- get_project() do
Memory.FileStore.init(store(project))
end
end
@impl Memory
def list() do
with {:ok, project} <- get_project() do
Memory.FileStore.list(store(project))
end
end
@impl Memory
def exists?(title) do
with {:ok, project} <- get_project() do
Memory.FileStore.exists?(store(project), title)
else
_reason -> false
end
end
@impl Memory
def read(title) do
with {:ok, project} <- get_project() do
Memory.FileStore.read(store(project), title)
end
end
@impl Memory
def save(memory) do
with {:ok, project} <- get_project() do
Memory.FileStore.save(store(project), memory)
end
end
@impl Memory
def forget(title) do
with {:ok, project} <- get_project() do
Memory.FileStore.forget(store(project), title)
end
end
@impl Memory
def is_available?() do
case Store.get_project() do
{:ok, _project} -> true
_ -> false
end
end
@doc """
Returns decoded memories for the current project for integration points that
need full `Memory.t()` structs.
Use `list_memories/0` when callers need decoded memory records. Use `list/0`
for the title-oriented listing required by the `Memory` behaviour.
"""
@spec list_memories() :: {:ok, [Memory.t()]} | {:error, term()}
def list_memories() do
with {:ok, project} <- get_project() do
Memory.FileStore.list_memories(store(project))
end
end
@doc """
Saves a memory into the given project without changing the currently selected
project.
Accepts either a `%Store.Project{}` struct or a project name binary.
"""
@spec save_into(Store.Project.t() | binary(), Memory.t()) :: :ok | {:error, term()}
def save_into(project, memory) do
with {:ok, project} <- resolve_project(project) do
Memory.FileStore.save(store(project), memory)
end
end
@doc """
Returns the project-scoped memory storage directory, or `{:error, ...}`
when no project is selected. Exposed so callers can build per-memory
lock paths without importing the internal `store/1` helper.
"""
@spec storage_path() :: {:ok, String.t()} | {:error, term()}
def storage_path do
with {:ok, project} <- get_project() do
{:ok, Path.join(project.store_path, "memory")}
end
end
# ----------------------------------------------------------------------------
# Internals
# ----------------------------------------------------------------------------
defp get_project() do
Store.get_project()
end
defp resolve_project(%Store.Project{} = project), do: {:ok, project}
defp resolve_project(project_name) when is_binary(project_name) do
Store.get_project(project_name)
end
defp store(%Store.Project{store_path: store_path}) do
Memory.FileStore.new(
storage_path: Path.join(store_path, "memory"),
old_storage_path: Path.join(store_path, "memories"),
debug_label: "memory:project"
)
end
end