ckn.backend/server/ThemeMiddleware.js

CKN Framework for Backend

import {ckn} from "ckn.core";
import {Middleware} from "../core/Middleware.js";
import {File} from "ckn.stream";
import path from "path";

class ThemeMiddleware extends Middleware {
    constructor() {
        super();
        this.priority = 5;
        this.themeFolder = "themes";
    }

    async onStartingServer(backend, next) {
        backend.themes = [];
        let themePath = File.join(this.themeFolder);
        let themeDirectory = themePath.toDirectory();
        if (themeDirectory.isExist) {
            for (let directory of themeDirectory.directories) {
                let name = directory.name;
                backend.themes[name] = {
                    name: name,
                    path: directory.path,
                    subthemes: []
                };
                for (let themFile of directory.path.toDirectory().files) {
                    let subThemeName = themFile.name.replace(".js", "");
                    if (themFile.isExist) {
                        let themeClass = Object.values(await import("file://"+path.resolve(themFile.fullPath)))[0];
                        backend.themes[name].subthemes[subThemeName] = {
                            name: subThemeName,
                            themeClass: themeClass
                        }
                    }
                }
            }
        }
        next();
    }

    async onInitialSession(backend, session, next) {
        session.loadTheme = (themeName, subThemeName) => {
            if (backend.themes[themeName] != null) {
                let theme = new backend.themes[themeName].subthemes[subThemeName].themeClass();
                theme.self = theme;
                return theme;
            }
            return null;
        };
        next();
    }
}

export {ThemeMiddleware}