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package ui;
import model.html.ElementNode;
import model.html.HtmlParser;
import model.html.TextNode;
import model.html.Node;
import java.nio.file.*;
import java.util.*;
/**
* The console interface to Apus.
*/
public class BrowserApp {
private Scanner input;
private static final String border = "===============================================";
private String pathString;
private ArrayList<Node> parsed;
private ArrayDeque<String> tabs;
/**
* EFFECTS: Renders an arbitrary HTML page and arbitrary HTML input.
*/
public BrowserApp() {
println("apus: currently a barebones html/css renderer");
this.input = new Scanner(System.in);
this.tabs = new ArrayDeque<>();
mainLoop();
}
/**
* EFFECTS: Runs the main loop
*/
private void mainLoop() {
while (true) {
try {
Path path = Paths.get(pathString);
String file = new String(Files.readAllBytes(path));
HtmlParser parser = new HtmlParser();
parsed = parser.parseHtml(file);
println(border);
renderHtml(parsed);
println(border);
println("Page rendered. Input additional commands if desired.");
println("Impemented commands: newuri, newtab, nexttab, quit");
handleInput(this.input.next());
println(border);
} catch (Exception e) {
println("Reading from the file failed with " + e.toString());
println("Please try again.");
}
}
}
/**
* EFFECTS: Barebones HTML rendering. Iterates through a list of Nodes and their children and prints any text.
*/
private void renderHtml(ArrayList<Node> html) {
for (Node node: html) {
if (node instanceof TextNode) {
println(node.getData());
} else {
renderHtml(((ElementNode) node).getChildren());
}
}
}
/**
* EFFECTS: Handles user input after rendering an initial site
*/
private void handleInput(String input) {
switch (input) {
case "newuri":
println("please provide a path to a file (examples located in data/*):");
pathString = this.input.next();
break;
case "newtab":
this.tabs.add(pathString);
println("please provide a path to a file (examples located in data/*):");
pathString = this.input.next();
break;
case "nexttab":
this.tabs.add(pathString);
pathString = this.tabs.removeFirst();
break;
case "quit":
System.exit(0);
break;
default:
println("Sorry, I didn't quite get that. Please try again.");
break;
}
}
private void print(String toPrint) {
System.out.print(toPrint);
}
private void println(String toPrint) {
System.out.println(toPrint);
}
}
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