@kohanajs/mod-live-home/classes/controller-mixin/LiveHome.js

The Live Homepage allow admin to refresh visitor's home page.

const { ControllerMixin } = require('@kohanajs/core-mvc');
const {KohanaJS, ControllerMixinView} = require("kohanajs");

const {readFile} = require('fs/promises');
const path = require('path');

class ControllerMixinLiveHome extends ControllerMixin {
  static PING_DATA = "PING_DATA";

  static async setup(state) {
    //read properties from controller
    const client = state.get(ControllerMixin.CLIENT);
    const {request, language} = client;

    //only redirect action listed in config file
    const action = state.get(ControllerMixin.FULL_ACTION_NAME).replace("action_", "");
    if(!(action === "index" || KohanaJS.config.livehome.homepages.has(action)))return;

    //only redirect GET
    if(request.raw && request.raw.method && request.raw.method !== 'GET')return;

    //url query have no redirect param, do nothing;
    if (request.query && request.query[KohanaJS.config.livehome.url_param_no_redirect] !== undefined) return;
    //read ping file
    try {
      const ping = await readFile(path.normalize(KohanaJS.config.livehome.ping_file), 'utf-8');
      state.set(this.PING_DATA, JSON.parse(ping || "{}"))
    } catch (e) {
      console.log(e);
      return;
    }

    const {payload} = state.get(this.PING_DATA);

    //check controller action match ping file payload.home
    if (state.get(ControllerMixin.FULL_ACTION_NAME) === `action_${payload.home}`) return;

    const homepage = KohanaJS.config.livehome.homepages.has(payload.home) ? payload.home : (KohanaJS.config.livehome.default_home || 'register');
    //keep query string but forward to another page;
    await client.redirect(language ? `/${language}/${homepage}`: `/${homepage}`, true);
  }

  static async after(state){
    if(!state.get(ControllerMixinView.LAYOUT))return;

    const ping = state.get(this.PING_DATA);
    if(!ping)return;

    const layoutData = state.get(ControllerMixinView.LAYOUT).data;
    if(!Array.isArray(layoutData.scripts)){
      layoutData.scripts = [];
    }

    layoutData.scripts.push('ping-update.js');

    Object.assign(
      layoutData,
      {
        now: Date.now(),
        home: ping.payload?.home,
        state: ping.payload?.state,
        last_update: ping.meta?.last_update,
      }
    )
  }
}

module.exports = ControllerMixinLiveHome;