architex/lib/matrix_server/schema/device.ex

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defmodule MatrixServer.Device do
use Ecto.Schema
import Ecto.{Changeset, Query}
alias MatrixServer.{Account, Device, Repo}
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alias MatrixServerWeb.Request.Login
@primary_key false
schema "devices" do
field :device_id, :string, primary_key: true
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field :access_token, :string, redact: true
field :display_name, :string
belongs_to :account, Account,
foreign_key: :localpart,
references: :localpart,
type: :string,
primary_key: true
end
def changeset(device, params \\ %{}) do
device
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|> cast(params, [:display_name, :device_id])
|> validate_required([:localpart, :device_id])
|> unique_constraint([:localpart, :device_id], name: :devices_pkey)
end
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def insert_new_access_token(repo, %{
device: %Device{localpart: localpart, device_id: device_id} = device
}) do
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access_token = generate_access_token(localpart, device_id)
device
|> change(%{access_token: access_token})
|> repo.update()
end
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def generate_access_token(localpart, device_id) do
Phoenix.Token.encrypt(MatrixServerWeb.Endpoint, "access_token", {localpart, device_id})
end
def generate_device_id(localpart) do
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# TODO: use random string instead
"#{localpart}_#{System.os_time(:millisecond)}"
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end
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def login(%Login{} = input, account) do
device_id = input.device_id || generate_device_id(account.localpart)
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access_token = generate_access_token(account.localpart, device_id)
update_query =
from(d in Device)
|> update(set: [access_token: ^access_token, device_id: ^device_id])
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|> then(fn q ->
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if input.initial_device_display_name do
update(q, set: [display_name: ^input.initial_device_display_name])
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else
q
end
end)
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device_params = %{
device_id: device_id,
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display_name: input.initial_device_display_name
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}
Ecto.build_assoc(account, :devices)
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|> Device.changeset(device_params)
|> put_change(:access_token, access_token)
|> Repo.insert(on_conflict: update_query, conflict_target: [:localpart, :device_id])
end
end