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/*
* WPCleaner: A tool to help on Wikipedia maintenance tasks.
* Copyright (C) 2013 Nicolas Vervelle
*
* See README.txt file for licensing information.
*/
package org.wikipediacleaner.api.check.algorithm;
import java.util.Collection;
import org.wikipediacleaner.api.check.CheckErrorResult;
import org.wikipediacleaner.api.data.MagicWord;
import org.wikipediacleaner.api.data.PageAnalysis;
import org.wikipediacleaner.api.data.PageElementInternalLink;
/**
* Algorithm for analyzing error 36 of check wikipedia project.
* Error 36: Redirect not correct
*/
public class CheckErrorAlgorithm036 extends CheckErrorAlgorithmBase {
public CheckErrorAlgorithm036() {
super("Redirect not correct");
}
/**
* Analyze a page to check if errors are present.
*
* @param analysis Page analysis.
* @param errors Errors found in the page.
* @param onlyAutomatic True if analysis could be restricted to errors automatically fixed.
* @return Flag indicating if the error was found.
*/
@Override
public boolean analyze(
PageAnalysis analysis,
Collection<CheckErrorResult> errors, boolean onlyAutomatic) {
if (analysis == null) {
return false;
}
// Retrieve magic word for redirects
MagicWord redirect = analysis.getWikiConfiguration().getMagicWordByName(MagicWord.REDIRECT);
if ((redirect == null) ||
(redirect.getAliases() == null) ||
(redirect.getAliases().isEmpty())) {
return false;
}
// Analysis of all article text
boolean result = false;
String contents = analysis.getContents();
int currentIndex = 0;
while (currentIndex < contents.length()) {
// Check if we are at the beginning of a #REDIRECT
String aliasFound = null;
if (contents.charAt(currentIndex) == '#') {
for (String alias : redirect.getAliases()) {
int endIndex = currentIndex + alias.length();
if ((endIndex < contents.length()) &&
(alias.length() > 0) &&
(alias.equalsIgnoreCase(contents.substring(currentIndex, endIndex)))) {
char nextChar = contents.charAt(endIndex);
if ((nextChar == ' ') || (nextChar == '[')) {
aliasFound = alias;
}
}
}
}
// Check if there's a link after the #REDIRECT
boolean linkFound = false;
if (aliasFound != null) {
int tmpIndex = currentIndex + aliasFound.length();
while ((tmpIndex < contents.length()) && (contents.charAt(tmpIndex) == ' ')) {
tmpIndex++;
}
if ((tmpIndex < contents.length()) && (contents.charAt(tmpIndex) == '[')) {
PageElementInternalLink link = analysis.isInInternalLink(tmpIndex);
if ((link != null) && (link.getBeginIndex() == tmpIndex)) {
linkFound = true;
}
}
}
// Report error if needed
if (aliasFound != null) {
if (!linkFound) {
if (errors == null) {
return true;
}
result = true;
CheckErrorResult errorResult = createCheckErrorResult(
analysis, currentIndex, currentIndex + aliasFound.length());
errors.add(errorResult);
}
currentIndex += aliasFound.length();
} else {
currentIndex++;
}
}
return result;
}
}