# `Athanor.Ctx`
[🔗](https://github.com/Arsenalist/athanor/blob/v0.1.0-beta.7/lib/athanor/ctx.ex#L1)

Context struct carried through every `Athanor.Renderer` dispatch.

Holds two kinds of data:

- **Passthrough**: `user_id`, `account_id`, `api_token`, `brand_id`,
  `cart_id`. Athanor does not interpret these — they exist so consumer
  apps can give their components the bits of session context they need
  (auth, scoping, current cart).

- **Adapters**: `asset_picker`, `rich_text`, `data_sources`, `i18n`.
  These are pluggable behaviours that components consume instead of
  importing app-specific modules. v1 keeps the fields with `nil`
  defaults; adapter behaviours land in a later step.

- **Editor mode**: `edit_mode?`, `add_component_callback`, and
  `select_component_callback`. Set by the host LiveView when rendering
  inside the editor canvas. Container components (e.g.
  `Athanor.Components.Columns`) branch on `edit_mode?` to render canvas
  chrome, invoke `add_component_callback.(zone_name)` so the consumer
  can open its palette modal pre-targeted at the right zone, and invoke
  `select_component_callback.(node_id)` to render a "Configure" button
  per nested child that opens the consumer's config panel.

`extra` is a free-form map for consumer-side passthrough that doesn't fit
the named fields (feature flags, request id, A/B test bucket, etc.).
Athanor never inspects `extra`.

## Examples

    iex> ctx = Athanor.Ctx.new(account_id: "a1", cart_id: "c1")
    iex> ctx.account_id
    "a1"

    iex> Athanor.Ctx.new().data_sources
    %{}

# `t`

```elixir
@type t() :: %Athanor.Ctx{
  account_id: String.t() | nil,
  add_component_callback: (String.t() -> any()) | nil,
  api_token: String.t() | nil,
  asset_picker: module() | nil,
  brand_id: String.t() | nil,
  cart_id: String.t() | nil,
  data_sources: %{required(String.t()) => module()},
  edit_mode?: boolean(),
  extra: map(),
  i18n: module() | nil,
  rich_text: module() | nil,
  select_component_callback: (String.t() -> any()) | nil,
  user_id: String.t() | nil
}
```

# `new`

Build an empty Ctx with all default values.

# `new`

Build a Ctx with overrides supplied as a keyword list or map.

Unknown keys raise `KeyError` to catch typos early.

---

*Consult [api-reference.md](api-reference.md) for complete listing*