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lib/wechat.ex
defmodule Wechat do
@moduledoc """
Use this module to build your own API wrapper for a client.
## Config
config :my_app, MyApp.Wechat,
appid: "APP_ID",
secret: "APP_SECRET",
token: "TOKEN",
encoding_aes_key: "ENCODING_AES_KEY" # Required if you enabled the encrypt mode
## Example
def MyApp.Wechat do
use Wechat, otp_app: :my_app
def users do
client() |> Wechat.User.get()
end
end
"""
alias Wechat.Client
@callback client() :: Client.t()
@callback config() :: Keyword.t()
defmacro __using__(opts) do
quote bind_quoted: [opts: opts] do
@behaviour Wechat
otp_app = Keyword.fetch!(opts, :otp_app)
@otp_app otp_app
@impl true
def config do
Application.get_env(@otp_app, __MODULE__, [])
end
@impl true
def client do
Wechat.Client.new(config())
end
end
end
end