136 lines
2.8 KiB
Elixir
136 lines
2.8 KiB
Elixir
defmodule Prymn.Servers do
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@moduledoc """
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The Servers context.
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"""
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import Ecto.Query, warn: false
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alias Prymn.Repo
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alias Prymn.Servers.Server
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@doc """
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Returns the list of servers.
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## Examples
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iex> list_servers()
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[%Server{}, ...]
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"""
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def list_servers do
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Repo.all(Server |> order_by(desc: :inserted_at))
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end
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@doc """
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Gets a single server.
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Raises `Ecto.NoResultsError` if the Server does not exist.
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## Examples
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iex> get_server!(123)
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%Server{}
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iex> get_server!(456)
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** (Ecto.NoResultsError)
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"""
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def get_server!(id), do: Repo.get!(Server, id)
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@doc """
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Get a single server by its IP.
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"""
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@spec get_server_by_ip!(String.t()) :: %Server{}
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def get_server_by_ip!(ip), do: Repo.get_by!(Server, public_ip: ip)
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@doc """
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Start a new server connection with the app.
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"""
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def create_server(attrs \\ %{}) do
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# Create a unique registration token
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%Server{registration_token: :crypto.strong_rand_bytes(16)}
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|> Server.changeset(attrs)
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|> Repo.insert()
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end
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@doc """
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Registers a server using a registration token.
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"""
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def register_server(token, public_ip) do
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with true <- :inet.is_ip_address(public_ip),
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{:ok, token} <- Base.decode64(token) do
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public_ip_string =
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public_ip
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|> :inet.ntoa()
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|> to_string()
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from(s in Server, where: s.registration_token == ^token, select: s)
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|> Repo.one!()
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|> update_server(%{public_ip: public_ip_string, status: :registered})
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else
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false -> {:error, :invalid_ip}
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:error -> {:error, :bad_token}
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end
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end
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@doc """
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Updates a server.
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## Examples
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iex> update_server(server, %{field: new_value})
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{:ok, %Server{}}
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iex> update_server(server, %{field: bad_value})
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{:error, %Ecto.Changeset{}}
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"""
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def update_server(%Server{} = server, attrs) do
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server
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|> Server.changeset(attrs)
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|> Repo.update()
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end
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@doc """
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Deletes a server.
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## Examples
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iex> delete_server(server)
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{:ok, %Server{}}
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iex> delete_server(server)
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{:error, %Ecto.Changeset{}}
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"""
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def delete_server(%Server{} = server) do
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Repo.delete(server)
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end
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@doc """
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Returns an `%Ecto.Changeset{}` for tracking server changes.
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## Examples
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iex> change_server(server)
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%Ecto.Changeset{data: %Server{}}
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"""
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def change_server(%Server{} = server, attrs \\ %{}) do
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Server.changeset(server, attrs)
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end
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@doc """
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Returns a string containing the command that needs to be executed to the
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remote server in order to register it to the backend.
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"""
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@spec create_setup_command(%Server{}) :: String.t()
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def create_setup_command(%Server{registration_token: token}) do
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token
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|> Base.encode64()
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|> then(fn token ->
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"curl -sSfL " <> PrymnWeb.Endpoint.url() <> "/install | sh -s " <> token
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end)
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end
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end
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