Provide a way to use custom client

[ArtemSBulgakov]

Hello.

I use different method to make requests (axios instead of fetch). Also, I've implemented custom logic to receive tokens, it should be run before each request. But the current implementation of library doesn't let me to integrate my methods into client.

It would be cool if we could write a custom request method and provide to initializeClient.

One possible way is to just export createClientProxy function, so we could just implement some MoodleClient interface without touching Proxy logic.

[ArtemSBulgakov]

Found a way to redefine request method:

import { initializeClient } from "moodle-typed-ws"
import { serialize } from "object-to-formdata"
import { wsQueryPromise } from "./api.ts"
import { MOODLE_URL, MOODLE_WS_URL } from "./config.ts"

type MoodleFunction = (arg: object) => Promise<unknown>

export const MoodleClient = initializeClient({
  baseUrl: MOODLE_URL,
  token: "",
})
MoodleClient.utils.request = async <F extends MoodleFunction>(functionName: string, params: Parameters<F>[0]) => {
  return wsQueryPromise<ReturnType<F>>({
    url: MOODLE_WS_URL,
    data: {
      moodlewsrestformat: "json",
      wsfunction: functionName,
      ...serializeForm(params),
    },
  })
}

export const serializeForm = (data: unknown) => {
  return Object.fromEntries([
    ...serialize(data, {
      indices: true,
      booleansAsIntegers: true, // Moodle doesn't understand booleans
    }).entries(),
  ])
}