84 lines
2.6 KiB
Java
84 lines
2.6 KiB
Java
// Created by Fynn Godau 2019, licensed GNU GPL version 3 or later
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package org.schabi.newpipe.extractor.services.bandcamp.extractors;
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import org.json.JSONException;
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import org.json.JSONObject;
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import org.schabi.newpipe.extractor.exceptions.ParsingException;
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import java.util.ArrayList;
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import java.util.Arrays;
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public class BandcampExtractorHelper {
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/**
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* Get JSON behind <code>var $variable = </code> out of web page
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* <br/<br/>
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* Originally a part of bandcampDirect.
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*
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* @param html The HTML where the JSON we're looking for is stored inside a
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* variable inside some JavaScript block
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* @param variable Name of the variable
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* @return The JsonObject stored in the variable with this name
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*/
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public static JSONObject getJSONFromJavaScriptVariables(String html, String variable) throws JSONException, ParsingException {
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String[] part = html.split("var " + variable + " = ");
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String firstHalfGone = part[1];
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firstHalfGone = firstHalfGone.replaceAll("\" \\+ \"", "");
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int position = -1;
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int level = 0;
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for (char character : firstHalfGone.toCharArray()) {
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position++;
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switch (character) {
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case '{':
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level++;
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continue;
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case '}':
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level--;
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if (level == 0) {
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return new JSONObject(firstHalfGone.substring(0, position + 1)
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.replaceAll(" {4}//.+", "") // Remove comments in JSON
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);
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}
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}
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}
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throw new ParsingException("Unexpected HTML: JSON never ends");
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}
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/**
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* Concatenate all non-null and non-empty strings together while separating them using
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* the comma parameter
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*/
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public static String smartConcatenate(String[] strings, String comma) {
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StringBuilder result = new StringBuilder();
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// Remove empty strings
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ArrayList<String> list = new ArrayList<>(Arrays.asList(strings));
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for (int i = list.size() - 1; i >= 0; i--) {
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if (list.get(i) == null || list.get(i).isEmpty()) {
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list.remove(i);
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}
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}
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// Append remaining strings to result
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for (int i = 0; i < list.size(); i++) {
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String string = list.get(i);
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result.append(string);
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if (i != list.size() - 1) {
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// This is not the last iteration yet
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result.append(comma);
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}
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}
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return String.valueOf(result);
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}
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}
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