handlebars lekcja 1

Lekcja_06/server09.js

@@ -0,0 +1,78 @@
+const express = require("express")
+const app = express()
+const PORT = 3000
+const path = require('path')
+
+const { create } = require('express-handlebars');
+
+const context = {
+    subject: "09: użycie helperów",
+    text: "Lorem ipsum dolor sit amet"
+}
+
+const hbs = create({
+    defaultLayout: 'main.hbs', // Domyślny layout: views/layouts/main.hbs
+    extname: '.hbs', // rozszerzenie plików szablonów
+    helpers: {
+        short_title: function (title) {
+            return title.substring(0, 10) + "...";
+        },
+        capitals: function (title) {
+            let words = title.split(' ')
+            let output = ''
+            words.forEach(word => output += word[0].toUpperCase() + word.substring(1, word.length) + ' ')
+            output = output.substring(0, output.length - 1)
+            return output
+        },
+        dashes: function (title) {
+            let str = title.replaceAll(" ", "")
+            let output = ''
+            for (let i = 0; i < str.length; i++) {
+                output += str[i] + '-'
+            }
+            output = output.substring(0, output.length - 1)
+            return output
+        }
+    }
+});
+
+app.engine('.hbs', hbs.engine); // określenie silnika szablonów
+app.set('view engine', '.hbs');
+app.set('views', path.join(__dirname, 'views')); // ustalamy katalog views
+
+app.get("/", function (req, res) {
+    res.render('index09.hbs', context)
+})
+
+app.get("/handle04", function (req, res) {
+    let data = {
+        subject: context.subject,
+        books: []
+    };
+
+    if (req.query.title != 'on' && req.query.author != 'on' && req.query.lang != 'on') {
+        data.books.push({ value: "Musisz wybrać co najmniej jedno kryterium!" })
+    } else {
+        context.books.forEach(book => {
+            let attributes = []
+            if (req.query.title == 'on') {
+                attributes.push(book.title)
+            }
+            if (req.query.author == 'on') {
+                attributes.push(book.author)
+            }
+            if (req.query.lang == 'on') {
+                attributes.push(book.lang)
+            }
+            data.books.push({ value: attributes.join(', ') })
+        })
+    }
+
+    res.render('index041.hbs', data);
+})
+
+app.use(express.static("static"))
+
+app.listen(PORT, function () {
+    console.log("start serwera na porcie " + PORT)
+})