// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.corrector;
import static org.openstreetmap.josm.tools.I18n.tr;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.openstreetmap.josm.command.Command;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.OsmUtils;
import org.openstreetmap.josm.data.osm.Relation;
import org.openstreetmap.josm.data.osm.RelationMember;
import org.openstreetmap.josm.data.osm.Tag;
import org.openstreetmap.josm.data.osm.TagCollection;
import org.openstreetmap.josm.data.osm.Way;
/**
* A ReverseWayTagCorrector handles necessary corrections of tags
* when a way is reversed. E.g. oneway=yes needs to be changed
* to oneway=-1 and vice versa.
*
* The Corrector offers the automatic resolution in an dialog
* for the user to confirm.
*/
public class ReverseWayTagCorrector extends TagCorrector<Way> {
private static final String SEPARATOR = "[:_]";
private static final Pattern getPatternFor(String s) {
return getPatternFor(s, false);
}
private static final Pattern getPatternFor(String s, boolean exactMatch) {
if (exactMatch) {
return Pattern.compile("(^)(" + s + ")($)");
} else {
return Pattern.compile("(^|.*" + SEPARATOR + ")(" + s + ")(" + SEPARATOR + ".*|$)",
Pattern.CASE_INSENSITIVE);
}
}
private static final Collection<Pattern> ignoredKeys = new ArrayList<>();
static {
for (String s : OsmPrimitive.getUninterestingKeys()) {
ignoredKeys.add(getPatternFor(s));
}
for (String s : new String[]{"name", "ref", "tiger:county"}) {
ignoredKeys.add(getPatternFor(s, false));
}
for (String s : new String[]{"tiger:county", "turn:lanes", "change:lanes", "placement"}) {
ignoredKeys.add(getPatternFor(s, true));
}
}
private static class StringSwitcher {
private final String a;
private final String b;
private final Pattern pattern;
public StringSwitcher(String a, String b) {
this.a = a;
this.b = b;
this.pattern = getPatternFor(a + "|" + b);
}
public String apply(String text) {
Matcher m = pattern.matcher(text);
if (m.lookingAt()) {
String leftRight = m.group(2).toLowerCase();
StringBuilder result = new StringBuilder();
result.append(text.substring(0, m.start(2)));
result.append(leftRight.equals(a) ? b : a);
result.append(text.substring(m.end(2)));
return result.toString();
}
return text;
}
}
/**
* Reverses a given tag.
* @since 5787
*/
public static final class TagSwitcher {
private TagSwitcher() {
// Hide implicit public constructor for utility class
}
/**
* Reverses a given tag.
* @param tag The tag to reverse
* @return The reversed tag (is equal to <code>tag</code> if no change is needed)
*/
public static final Tag apply(final Tag tag) {
return apply(tag.getKey(), tag.getValue());
}
/**
* Reverses a given tag (key=value).
* @param key The tag key
* @param value The tag value
* @return The reversed tag (is equal to <code>key=value</code> if no change is needed)
*/
public static final Tag apply(final String key, final String value) {
String newKey = key;
String newValue = value;
if (key.startsWith("oneway") || key.endsWith("oneway")) {
if (OsmUtils.isReversed(value)) {
newValue = OsmUtils.trueval;
} else if (OsmUtils.isTrue(value)) {
newValue = OsmUtils.reverseval;
}
} else if (key.startsWith("incline") || key.endsWith("incline")
|| key.startsWith("direction") || key.endsWith("direction")) {
newValue = UP_DOWN.apply(value);
if (newValue.equals(value)) {
newValue = invertNumber(value);
}
} else if (key.endsWith(":forward") || key.endsWith(":backward")) {
// Change key but not left/right value (fix #8518)
newKey = FORWARD_BACKWARD.apply(key);
} else if (!ignoreKeyForCorrection(key)) {
for (StringSwitcher prefixSuffixSwitcher : stringSwitchers) {
newKey = prefixSuffixSwitcher.apply(key);
if (!key.equals(newKey)) {
break;
}
newValue = prefixSuffixSwitcher.apply(value);
if (!value.equals(newValue)) {
break;
}
}
}
return new Tag(newKey, newValue);
}
}
private static final StringSwitcher FORWARD_BACKWARD = new StringSwitcher("forward", "backward");
private static final StringSwitcher UP_DOWN = new StringSwitcher("up", "down");
private static final StringSwitcher[] stringSwitchers = new StringSwitcher[] {
new StringSwitcher("left", "right"),
new StringSwitcher("forwards", "backwards"),
new StringSwitcher("east", "west"),
new StringSwitcher("north", "south"),
FORWARD_BACKWARD, UP_DOWN
};
/**
* Tests whether way can be reversed without semantic change, i.e., whether tags have to be changed.
* Looks for keys like oneway, oneway:bicycle, cycleway:right:oneway, left/right.
* @param way
* @return false if tags should be changed to keep semantic, true otherwise.
*/
public static boolean isReversible(Way way) {
for (Tag tag : TagCollection.from(way)) {
if (!tag.equals(TagSwitcher.apply(tag))) {
return false;
}
}
return true;
}
public static List<Way> irreversibleWays(List<Way> ways) {
List<Way> newWays = new ArrayList<>(ways);
for (Way way : ways) {
if (isReversible(way)) {
newWays.remove(way);
}
}
return newWays;
}
public static String invertNumber(String value) {
Pattern pattern = Pattern.compile("^([+-]?)(\\d.*)$", Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(value);
if (!matcher.matches()) return value;
String sign = matcher.group(1);
String rest = matcher.group(2);
sign = "-".equals(sign) ? "" : "-";
return sign + rest;
}
@Override
public Collection<Command> execute(Way oldway, Way way) throws UserCancelException {
Map<OsmPrimitive, List<TagCorrection>> tagCorrectionsMap = new HashMap<>();
List<TagCorrection> tagCorrections = new ArrayList<>();
for (String key : way.keySet()) {
String value = way.get(key);
Tag newTag = TagSwitcher.apply(key, value);
String newKey = newTag.getKey();
String newValue = newTag.getValue();
boolean needsCorrection = !key.equals(newKey);
if (way.get(newKey) != null && way.get(newKey).equals(newValue)) {
needsCorrection = false;
}
if (!value.equals(newValue)) {
needsCorrection = true;
}
if (needsCorrection) {
tagCorrections.add(new TagCorrection(key, value, newKey, newValue));
}
}
if (!tagCorrections.isEmpty()) {
tagCorrectionsMap.put(way, tagCorrections);
}
Map<OsmPrimitive, List<RoleCorrection>> roleCorrectionMap = new HashMap<>();
List<RoleCorrection> roleCorrections = new ArrayList<>();
Collection<OsmPrimitive> referrers = oldway.getReferrers();
for (OsmPrimitive referrer: referrers) {
if (! (referrer instanceof Relation)) {
continue;
}
Relation relation = (Relation)referrer;
int position = 0;
for (RelationMember member : relation.getMembers()) {
if (!member.getMember().hasEqualSemanticAttributes(oldway)
|| !member.hasRole()) {
position++;
continue;
}
boolean found = false;
String newRole = null;
for (StringSwitcher prefixSuffixSwitcher : stringSwitchers) {
newRole = prefixSuffixSwitcher.apply(member.getRole());
if (!newRole.equals(member.getRole())) {
found = true;
break;
}
}
if (found) {
roleCorrections.add(new RoleCorrection(relation, position, member, newRole));
}
position++;
}
}
if (!roleCorrections.isEmpty()) {
roleCorrectionMap.put(way, roleCorrections);
}
return applyCorrections(tagCorrectionsMap, roleCorrectionMap,
tr("When reversing this way, the following changes are suggested in order to maintain data consistency."));
}
private static boolean ignoreKeyForCorrection(String key) {
for (Pattern ignoredKey : ignoredKeys) {
if (ignoredKey.matcher(key).matches()) {
return true;
}
}
return false;
}
}