/*
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Proto - Ein Rumpf-Konstrukt fuer Webapps
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Copyright (C) 2021 Ulrich Hilger
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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function Proto() {
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var self = this;
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var appMenu;
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var cache; // mustache templates
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this.init = function() {
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self.cache = new Array();
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self.appMenu = new AppMenu();
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self.appMenu.init(
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"data/menu/",
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"hauptmenue.json",
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"data/tpl/app-menu.txt",
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".west",
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"8em");
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document.querySelector('.hamburger').addEventListener('click', function(e) {
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self.menue_umschalten();
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});
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self.fusszeile_umschalten();
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self.seitenleiste_umschalten();
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};
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/* ------------------ sonstige Helfer ----------------------- */
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this.addEvtListener = function(selector, eventName, func) {
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document.querySelectorAll(selector).forEach(elem => { elem.addEventListener(eventName, func); });
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};
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this.removeClassMulti = function(selector) {
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document.querySelectorAll('.' + selector).forEach(elem => { elem.classList.remove(selector); });
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};
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/* --------------------- asynchroner HTTP Client ----------------- */
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this.http_get = function (u, cb) {
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self.http_call('GET', u, null, cb);
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};
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this.http_post = function (u, data, cb) {
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self.http_call('POST', u, data, cb);
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};
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this.http_put = function (u, data, cb) {
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self.http_call('PUT', u, data, cb);
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};
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this.http_delete = function (u, data, cb) {
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// console.log("delete " + u);
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self.http_call('DELETE', u, data, cb);
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};
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this.http_call = function (method, callurl, data, scallback) {
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var xhr = new XMLHttpRequest();
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xhr.onreadystatechange = function () {
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if (this.readyState === 4 && this.status === 200) {
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scallback(this.responseText);
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}
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};
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xhr.open(method, callurl);
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if (method === 'GET') {
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xhr.send();
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} else if (method === 'POST' || method === 'PUT' || method === 'DELETE') {
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xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
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xhr.send(data);
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}
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};
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/* ------------------------ aus App-Vorlage ------------------- */
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this.menue_umschalten = function () {
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var ham = document.querySelector(".hamburger");
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ham.classList.toggle("is-active"); // hamburger-icon umschalten
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self.appMenu.toggle(); // menue oeffnen/schliessen
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};
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this.info_dialog_zeigen = function () {
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self.dialog_laden_und_zeigen('data/tpl/dlg-info.txt', '');
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self.menue_umschalten();
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};
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this.seitenleiste_umschalten = function () {
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var ostDiv = document.querySelector('.ost');
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if (ostDiv.classList.contains('ost-open')) {
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ostDiv.classList.remove('ost-open');
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ostDiv.style.flexBasis = '0em';
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} else {
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ostDiv.classList.add('ost-open');
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ostDiv.style.flexBasis = '6em';
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}
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self.menue_umschalten();
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};
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this.fusszeile_umschalten = function () {
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var suedDiv = document.querySelector('.sued');
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if (suedDiv.classList.contains('sued-open')) {
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suedDiv.classList.remove('sued-open');
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suedDiv.style.height = '0';
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} else {
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suedDiv.classList.add('sued-open');
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suedDiv.style.height = '1.5em';
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}
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self.menue_umschalten();
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};
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this.menu_message = function (msg) {
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self.meldung_mit_timeout(msg, 1500);
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var suedDiv = document.querySelector('.sued');
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if (suedDiv.classList.contains('sued-open')) {
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} else {
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suedDiv.classList.add('sued-open');
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suedDiv.style.height = '1.5em';
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}
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self.menue_umschalten();
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};
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this.message_1 = function () {
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self.menu_message('Eine Mitteilung.');
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};
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this.message_2 = function () {
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self.menu_message('Was wir schon immer sagen wollten.');
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};
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this.message_3 = function (text) {
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self.menu_message(text);
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};
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this.meldung_mit_timeout = function (meldung, timeout) {
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var s = document.querySelector('.sued');
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s.classList.add('sued-open');
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s.style.height = '1.5em';
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s.textContent = meldung;
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setTimeout(function () {
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s.textContent = 'Bereit.';
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setTimeout(function () {
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var suedDiv = document.querySelector('.sued');
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if (suedDiv.classList.contains('sued-open')) {
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suedDiv.classList.remove('sued-open');
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suedDiv.style.height = '0';
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}
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}, 500);
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}, timeout);
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};
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/* --------------------- Dialog-Funktionen ------------------------ */
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/*
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Einen Dialog aus Vorlagen erzeugen
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vurl - URL zur Dialogvorlage
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msgTpl - URL mit einer Vorlage eines Mitteilungstextes (optional)
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*/
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this.dialog_laden_und_zeigen = function (vurl, msgTpl, cb) {
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var vorlage = self.cache[vurl];
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if(vorlage === undefined) {
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self.http_get(vurl, function(antwort) {
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self.cache[vurl] = antwort;
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self.dialog_zeigen(vurl, msgTpl, cb);
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});
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} else {
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self.dialog_zeigen(vurl, msgTpl, cb);
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}
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};
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this.dialog_zeigen = function (vurl, inhalt, cb) {
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var dlg = document.querySelector(".dialog");
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self.html_erzeugen(vurl, inhalt, function (html) {
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dlg.style.height = '7em';
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dlg.innerHTML = html;
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document.querySelector('.close-btn').addEventListener('click', self.dialog_schliessen);
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if(typeof(cb) !== 'function') {
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// ..
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} else {
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cb();
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}
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});
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};
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this.dialog_schliessen = function () {
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document.querySelector('.close-btn').removeEventListener('click', self.dialog_schliessen);
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var dlg = document.querySelector('.dialog');
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dlg.style.height = '0';
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dlg.innerHTML = '';
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};
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/* --------------------- Vorlagen ---------------------- */
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/*
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Das HTML erzeugen, das entsteht, wenn eine Vorlage mit Inhalt
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gefüllt wird
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Das Füllen erfolgt asynchron, d.h. der Programmlauf geht nach dem
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Aufruf weiter ohne auf das Laden und Füllen der Vorlage zu warten.
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Das fertige HTML wird der Callback-Funktion übergeben
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sobald die Vorlage geladen und gefüllt ist, unabhängig davon, wo der
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Programmlauf zu diesem Zeitpunkt mittlerweile ist.
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vurl - URL zur Vorlagendatei
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inhalt - die JSON-Struktur, deren Inhalt in die
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Vorlage gefüllt werden soll
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cb - Callback-Funktion, die gerufen wird, wenn die Vorlage gefüllt ist.
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Dieser Callback-Funktion wird das fertige HTML übergeben
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*/
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this.html_erzeugen = function (vurl, inhalt, cb) {
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var vorlage = self.cache[vurl];
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if (vorlage === undefined) {
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self.vorlage_laden_und_fuellen(vurl, inhalt, cb);
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} else {
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self.vorlage_fuellen(vurl, inhalt, cb);
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}
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};
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this.vorlage_fuellen = function (vurl, inhalt, cb) {
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cb(Mustache.render(self.cache[vurl], inhalt));
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};
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/*
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Eine Vorlage vom Server in den lokalen Speicher laden
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vurl - der URL unter dem die Vorlage zu finden ist
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inhalt - die JSON-Struktur, deren Inhalt in die
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Vorlage gefüllt werden soll
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cb - callback: Diese Funktion wird gerufen, wenn die Vorlage mit dem
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Inhalt gefüllt ist
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*/
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this.vorlage_laden_und_fuellen = function (vurl, inhalt, cb) {
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var xmlhttp = new XMLHttpRequest();
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xmlhttp.onreadystatechange = function () {
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if (this.readyState == 4 && this.status == 200) {
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self.cache[vurl] = this.responseText;
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self.vorlage_fuellen(vurl, inhalt, cb);
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}
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};
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xmlhttp.open("GET", vurl, true);
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xmlhttp.send();
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};
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}
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