src/reducer.ts

/*
Copyright (c) Uber Technologies, Inc.

This source code is licensed under the MIT license found in the
LICENSE file in the root directory of this source tree.
*/
import type { TState } from "./types";
import { Action } from "./const";
import { assertUnreachable, buildPropsObj } from "./utils";

export default function reducer(
  state: TState,
  action: { type: Action; payload: any },
): TState {
  switch (action.type) {
    case Action.UpdateCode:
      return { ...state, code: action.payload, codeNoRecompile: "" };
    case Action.UpdateCodeAndProvider:
      return {
        ...state,
        code: action.payload.code,
        providerValue: action.payload.providerValue,
        codeNoRecompile: "",
      };
    case Action.Update:
      return {
        ...state,
        code: action.payload.code,
        providerValue: action.payload.providerValue,
        codeNoRecompile: "",
        props: buildPropsObj(state.props, action.payload.updatedPropValues),
      };
    case Action.UpdatePropsAndCodeNoRecompile:
      return {
        ...state,
        codeNoRecompile: action.payload.codeNoRecompile,
        props: buildPropsObj(state.props, action.payload.updatedPropValues),
      };
    case Action.UpdateProps:
      return {
        ...state,
        codeNoRecompile: "",
        props: buildPropsObj(state.props, action.payload),
      };
    case Action.UpdatePropsAndCode:
      return {
        ...state,
        code: action.payload.code,
        codeNoRecompile: "",
        props: buildPropsObj(state.props, action.payload.updatedPropValues),
      };
    case Action.Reset:
      return {
        ...state,
        code: action.payload.code,
        codeNoRecompile: "",
        props: action.payload.props,
        providerValue: action.payload.providerValue,
      };
    default:
      return assertUnreachable();
  }
}