defmodule Memex.Contexts do @moduledoc """ The Contexts context. """ import Ecto.Query, warn: false alias Ecto.Changeset alias Memex.{Accounts.User, Contexts.Context, Repo} @doc """ Returns the list of contexts. ## Examples iex> list_contexts(%User{id: 123}) [%Context{}, ...] iex> list_contexts("my context", %User{id: 123}) [%Context{title: "my context"}, ...] """ @spec list_contexts(User.t()) :: [Context.t()] @spec list_contexts(search :: String.t() | nil, User.t()) :: [Context.t()] def list_contexts(search \\ nil, user) def list_contexts(search, %{id: user_id}) when search |> is_nil() or search == "" do Repo.all(from c in Context, where: c.user_id == ^user_id, order_by: c.title) end def list_contexts(search, %{id: user_id}) when search |> is_binary() do trimmed_search = String.trim(search) Repo.all( from c in Context, where: c.user_id == ^user_id, where: fragment( "search @@ to_tsquery(websearch_to_tsquery(?)::text || ':*')", ^trimmed_search ), order_by: { :desc, fragment( "ts_rank_cd(search, to_tsquery(websearch_to_tsquery(?)::text || ':*'), 4)", ^trimmed_search ) } ) end @doc """ Returns the list of public contexts for viewing. ## Examples iex> list_public_contexts() [%Context{}, ...] iex> list_public_contexts("my context") [%Context{title: "my context"}, ...] """ @spec list_public_contexts() :: [Context.t()] @spec list_public_contexts(search :: String.t() | nil) :: [Context.t()] def list_public_contexts(search \\ nil) def list_public_contexts(search) when search |> is_nil() or search == "" do Repo.all(from c in Context, where: c.visibility == :public, order_by: c.title) end def list_public_contexts(search) when search |> is_binary() do trimmed_search = String.trim(search) Repo.all( from c in Context, where: c.visibility == :public, where: fragment( "search @@ to_tsquery(websearch_to_tsquery(?)::text || ':*')", ^trimmed_search ), order_by: { :desc, fragment( "ts_rank_cd(search, to_tsquery(websearch_to_tsquery(?)::text || ':*'), 4)", ^trimmed_search ) } ) end @doc """ Gets a single context. Raises `Ecto.NoResultsError` if the Context does not exist. ## Examples iex> get_context!(123, %User{id: 123}) %Context{} iex> get_context!(456, %User{id: 123}) ** (Ecto.NoResultsError) """ @spec get_context!(Context.id(), User.t()) :: Context.t() def get_context!(id, %{id: user_id}) do Repo.one!( from c in Context, where: c.id == ^id, where: c.user_id == ^user_id or c.visibility in [:public, :unlisted] ) end def get_context!(id, _invalid_user) do Repo.one!( from c in Context, where: c.id == ^id, where: c.visibility in [:public, :unlisted] ) end @doc """ Creates a context. ## Examples iex> create_context(%{field: value}, %User{id: 123}) {:ok, %Context{}} iex> create_context(%{field: bad_value}, %User{id: 123}) {:error, %Ecto.Changeset{}} """ @spec create_context(User.t()) :: {:ok, Context.t()} | {:error, Context.changeset()} @spec create_context(attrs :: map(), User.t()) :: {:ok, Context.t()} | {:error, Context.changeset()} def create_context(attrs \\ %{}, user) do Context.create_changeset(attrs, user) |> Repo.insert() end @doc """ Updates a context. ## Examples iex> update_context(context, %{field: new_value}, %User{id: 123}) {:ok, %Context{}} iex> update_context(context, %{field: bad_value}, %User{id: 123}) {:error, %Ecto.Changeset{}} """ @spec update_context(Context.t(), attrs :: map(), User.t()) :: {:ok, Context.t()} | {:error, Context.changeset()} def update_context(%Context{} = context, attrs, user) do context |> Context.update_changeset(attrs, user) |> Repo.update() end @doc """ Deletes a context. ## Examples iex> delete_context(%Context{user_id: 123}, %User{id: 123}) {:ok, %Context{}} iex> delete_context(%Context{user_id: 123}, %User{role: :admin}) {:ok, %Context{}} iex> delete_context(%Context{}, %User{id: 123}) {:error, %Ecto.Changeset{}} """ @spec delete_context(Context.t(), User.t()) :: {:ok, Context.t()} | {:error, Context.changeset()} def delete_context(%Context{user_id: user_id} = context, %{id: user_id}) do context |> Repo.delete() end def delete_context(%Context{} = context, %{role: :admin}) do context |> Repo.delete() end @doc """ Returns an `%Ecto.Changeset{}` for tracking context changes. ## Examples iex> change_context(context) %Ecto.Changeset{data: %Context{}} """ @spec change_context(Context.t(), User.t()) :: Context.changeset() @spec change_context(Context.t(), attrs :: map(), User.t()) :: Context.changeset() def change_context(%Context{} = context, attrs \\ %{}, user) do context |> Context.update_changeset(attrs, user) end @doc """ Gets a canonical string representation of the `:tags` field for a Note """ @spec get_tags_string(Context.t() | Context.changeset() | [String.t()] | nil) :: String.t() def get_tags_string(nil), do: "" def get_tags_string(tags) when tags |> is_list(), do: tags |> Enum.join(",") def get_tags_string(%Context{tags: tags}), do: tags |> get_tags_string() def get_tags_string(%Changeset{} = changeset) do changeset |> Changeset.get_field(:tags) |> get_tags_string() end end