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MarkdownParse.java
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MarkdownParse.java
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// File reading code from https://howtodoinjava.com/java/io/java-read-file-to-string-examples/
/*public class MarkdownParse {
public static ArrayList<String> getLinks(String markdown) {
ArrayList<String> toReturn = new ArrayList<>();
// find the next [, then find the ], then find the (, then take up to
// the next )
int currentIndex = 0;
while(currentIndex < markdown.length()) {
int nextOpenBracket = markdown.indexOf("[", currentIndex);
System.out.format("%d\t%d\t%s\n", currentIndex, nextOpenBracket, toReturn);
int nextCloseBracket = markdown.indexOf("]", nextOpenBracket);
int openParen = markdown.indexOf("(", nextCloseBracket);
int closeParen = markdown.indexOf(")", openParen);
if(nextOpenBracket == -1 || nextCloseBracket == -1
|| closeParen == -1 || openParen == -1) {
return toReturn;
}
String potentialLink = markdown.substring(openParen + 1, closeParen);
if(potentialLink.indexOf(" ") == -1 && potentialLink.indexOf("\n") == -1) {
toReturn.add(potentialLink);
currentIndex = closeParen + 1;
}
else {
currentIndex = currentIndex + 1;
}
}
return toReturn;
}
public static void main(String[] args) throws IOException {
Path fileName = Path.of(args[0]);
String contents = Files.readString(fileName);
ArrayList<String> links = getLinks(contents);
System.out.println(links);
}
}*/
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
public class MarkdownParse {
public static ArrayList<String> getLinks(String markdown) {
ArrayList<String> toReturn = new ArrayList<>();
// find the next [, then find the ], then find the (, then take up to
// the next )
int currentIndex = 0;
while(currentIndex < markdown.length()) {
int nextOpenBracket = markdown.indexOf("[", currentIndex);
System.out.println(currentIndex);
int nextCloseBracket = markdown.indexOf("]", nextOpenBracket);
//the second argument is for where to start research, if not provided, search start from index 0
int openParen = markdown.indexOf("(", nextCloseBracket);
int closeParen = markdown.indexOf(")", openParen);
if (nextCloseBracket + 1 == openParen && closeParen-openParen != 1
&& (nextOpenBracket == 0 || markdown.charAt(nextOpenBracket - 1) != '!' )){
toReturn.add(markdown.substring(openParen + 1, closeParen));
//condition check added
int space = markdown.indexOf(" ", openParen);
for(int i = 0; i < closeParen; i++){
if(space == i){
toReturn.remove(markdown.substring(openParen + 1, closeParen));
}
}
}
currentIndex = closeParen + 1;
System.out.println(currentIndex);
}
return toReturn;
}
public static void main(String[] args) throws IOException {
Path fileName = Path.of(args[0]);
String contents = Files.readString(fileName);
ArrayList<String> links = getLinks(contents);
System.out.println(links);
}
}