IndexBuilder.java

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.attribute.FileTime;
import java.util.ArrayList;
import java.util.Arrays;

@SuppressWarnings("SameParameterValue")
class IndexBuilder {
 public static void main(String[] args) throws IOException {
 String indexPath = "C:\\Projects\\krabcode\\index.html";
 File html = new File(indexPath);
 Document doc = Jsoup.parse(html, "utf-8");
 Element container = doc.getElementById("autogenerated");
 container.text("");
 container.append(generateContentFromFolder("C:\\Projects\\krabcode\\content"));
 writeAllLines(Paths.get(indexPath), doc.outerHtml().split("/n"));
 println("index.html updated successfully");
 // TODO upload to forpsi
 }

 private static String generateContentFromFolder(String path) {
 StringBuilder result = new StringBuilder();
 File mainFolder = new File(path);
 File[] folders = mainFolder.listFiles();
 sortFoldersByTimeCreated(folders);

 for (File folder : folders) {
 if (folder.isDirectory()) {
 int uniqueFilenamesInFolder = uniqueFilenameCountInFolder(folder);
 if (uniqueFilenamesInFolder == 0) {
 continue;
 }
 if (uniqueFilenamesInFolder == 1) {
 result.append(createSimpleModal(folder));
 } else {
 result.append(createCarouselModal(folder));
 }
 //TODO if folder contains .mp4 but not .webm generate one and add it to the html element too
 // FASTER LOADING is paramount!
 }
 }
 return result.toString();
 }

 private static void sortFoldersByTimeCreated(File[] folders) {
 assert folders != null;
 Arrays.sort(folders, (f1, f2) -> {
 try {
 return timeCreated(f2).compareTo(timeCreated(f1));
 } catch (IOException e) {
 e.printStackTrace();
 }
 return 0;
 });
 }

 static FileTime timeCreated(File file) throws IOException {
 BasicFileAttributes attrs = Files.readAttributes(file.toPath(), BasicFileAttributes.class);
 return attrs.creationTime();
 }

 private static String createSimpleModal(File folder) {
 ArrayList<String> uniqueFilenames = uniqueFilenamesInFolder(folder);
 String videoExtension = getVideoExtension(folder);
 return "<a href=\"#" + folder.getName() + "Modal\" role=\"button\" data-toggle=\"modal\"> <img class=\"thumb\" src=\"content/" + folder.getName() + "/" + uniqueFilenames.get(0) + ".jpg\" alt=\"" + folder.getName() + "\"/> </a>\n" +
 " <div id=\"" + folder.getName() + "Modal\" class=\"modal fade\" role=\"dialog\">\n" +
 " <div class=\"modal-dialog modal-dialog-centered modal-lg\">\n" +
 " <div class=\"modal-content\">\n" +
 " <div class=\"modal-body\">\n" +
 " <video autoplay controls loop muted poster=\"content/" + folder.getName() + "/" + uniqueFilenames.get(0) + ".jpg\" class=\"embed-responsive embed-responsive-1by1 main-video\">\n" +
 " <source src=\"content/" + folder.getName() + "/" + uniqueFilenames.get(0) + "." + videoExtension + "\" type=\"video/" + videoExtension + "\">\n" +
 " </video>\n" +
 " </div>\n" +
 " </div>\n" +
 " </div>\n" +
 " </div>";
 }

 @SuppressWarnings("StringConcatenationInsideStringBufferAppend")
 private static String createCarouselModal(File folder) {
 ArrayList<String> uniqueFilenames = uniqueFilenamesInFolder(folder);
 String videoExtension = getVideoExtension(folder);
 StringBuilder carouselModal = new StringBuilder();
 carouselModal.append("<a href=\"#" + folder.getName() + "Modal\" role=\"button\" data-toggle=\"modal\"> <img class=\"thumb\" src=\"content/" + folder.getName() + "/" + uniqueFilenames.get(0) + ".jpg\" alt=\"" + folder.getName() + "\"/> </a>\n" +
 " <div id=\"" + folder.getName() + "Modal\" class=\"modal fade\" role=\"dialog\">\n" +
 " <div class=\"modal-dialog modal-dialog-centered modal-lg\" role=\"document\">\n" +
 " <div class=\"modal-content\">\n" +
 " <div class=\"modal-body\">\n" +
 " <div id=\"" + folder.getName() + "Carousel\" class=\"carousel carousel-fade\" data-ride=\"carousel\" data-interval=\"false\" data-keyboard=\"false\">\n" +
 " <div class=\"carousel-inner\" role=\"listbox\">\n");

 carouselModal.append("<div class=\"carousel-item active\">\n" +
 " <video autoplay controls loop muted poster=\"content/" + folder.getName() + "/" + uniqueFilenames.get(0) + ".jpg\" class=\"embed-responsive embed-responsive-1by1 main-video\">\n" +
 " <source src=\"content/" + folder.getName() + "/" + uniqueFilenames.get(0) + "." + videoExtension + "\" type=\"video/" + videoExtension + "\">\n" +
 " </video>\n" +
 " </div>\n");
 for (int i = 1; i < uniqueFilenames.size(); i++) {
 carouselModal.append("<div class=\"carousel-item\">\n" +
 " <video autoplay controls loop muted poster=\"content/" + folder.getName() + "/" + uniqueFilenames.get(0) + ".jpg\" class=\"embed-responsive embed-responsive-1by1 main-video\">\n" +
 " <source src=\"content/" + folder.getName() + "/" + uniqueFilenames.get(i) + "." + videoExtension + "\" type=\"video/" + videoExtension + "\">\n" +
 " </video>\n" +
 "</div>\n");
 }

 carouselModal.append("</div>" +
 " <a class=\"carousel-control-prev\" href=\"#" + folder.getName() + "Carousel\" role=\"button\" data-slide=\"prev\">\n" +
 " <span class=\"carousel-control-prev-icon\" aria-hidden=\"true\"></span>\n" +
 " <span class=\"sr-only\">Previous</span>\n" +
 " </a>\n" +
 " <a class=\"carousel-control-next\" href=\"#" + folder.getName() + "Carousel\" role=\"button\" data-slide=\"next\">\n" +
 " <span class=\"carousel-control-next-icon\" aria-hidden=\"true\"></span>\n" +
 " <span class=\"sr-only\">Next</span>\n" +
 " </a>\n" +
 "\n" +
 " </div>\n" +
 " </div>\n" +
 " </div>\n" +
 " </div>\n" +
 " </div>");
 return carouselModal.toString();
 }

 private static String getVideoExtension(File folder) {
 for (File f : folder.listFiles()) {
 if (f.getName().contains("mp4")) {
 return "mp4";
 }
 if (f.getName().contains("webm")) {
 return "webm";
 }
 }
 return null;
 }

 private static int uniqueFilenameCountInFolder(File folder) {
 return uniqueFilenamesInFolder(folder).size();
 }

 private static ArrayList<String> uniqueFilenamesInFolder(File folder) {
 ArrayList<String> knownFilenames = new ArrayList<String>();
 for (File f : folder.listFiles()) {
 String filenameWithoutExtension = f.getName().split("\\.")[0];
 if (!knownFilenames.contains(filenameWithoutExtension)) {
 knownFilenames.add(filenameWithoutExtension);
 }
 }
 return knownFilenames;
 }

 private static void writeAllLines(Path path, String[] gradleFile) throws IOException {
 FileWriter fw = new FileWriter(path.toFile());
 for (String s : gradleFile) {
 fw.write(s + System.lineSeparator());
 }
 fw.close();
 }

 static void println(String line) {
 System.out.println(line);
 }
}