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lib/memory/global.ex
defmodule Memory.Global do
@moduledoc """
Global memory storage implementation for the `Memory` behaviour.
This module uses the shared file-backed `Memory.FileStore` and primarily
supplies the global-memory runtime paths and availability semantics.
Global memories are stored as JSON files in `~/.fnord/memory`.
"""
# ----------------------------------------------------------------------------
# Behaviour Implementation
# ----------------------------------------------------------------------------
@behaviour Memory
@impl Memory
def init(), do: Memory.FileStore.init(store())
@impl Memory
def list(), do: Memory.FileStore.list(store())
@impl Memory
def exists?(title), do: Memory.FileStore.exists?(store(), title)
@impl Memory
def read(title), do: Memory.FileStore.read(store(), title)
@impl Memory
def save(memory), do: Memory.FileStore.save(store(), memory)
@impl Memory
def forget(title), do: Memory.FileStore.forget(store(), title)
@impl Memory
def is_available?(), do: true
@doc """
Returns decoded global memories for integration points that need a one-pass
listing path.
Unlike `list/0`, which is the title-oriented listing required by the `Memory`
behaviour, this function returns fully decoded `Memory` structs.
"""
@spec list_memories() :: {:ok, [Memory.t()]} | {:error, term()}
def list_memories(), do: Memory.FileStore.list_memories(store())
@doc """
Returns the global memory storage directory. Exposed so callers can
build per-memory lock paths without importing the internal `store/0`
helper.
"""
@spec storage_path() :: String.t()
def storage_path, do: Path.join(Store.store_home(), "memory")
# ----------------------------------------------------------------------------
# Internals
# ----------------------------------------------------------------------------
defp store() do
Memory.FileStore.new(
storage_path: Path.join(Store.store_home(), "memory"),
old_storage_path: Path.join(Store.store_home(), "memories"),
debug_label: "memory:global"
)
end
end