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package de.cowtipper.cowlection.partyfinder;
import de.cowtipper.cowlection.data.DataHelper;
import de.cowtipper.cowlection.util.Utils;
import net.minecraft.util.EnumChatFormatting;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
public class Rule {
private final transient List<String> patternException;
private boolean isEnabled;
private transient boolean isValid;
private TriggerType triggerType;
private String triggerText;
private transient Pattern triggerRegex;
private String middleText;
private DataHelper.PartyType partyType;
public Rule(boolean isEnabled, String trigger, TriggerType triggerType, String middleText, DataHelper.PartyType partyType) {
this.patternException = new ArrayList<>();
this.isEnabled = isEnabled;
this.triggerText = trigger;
this.triggerType = triggerType;
this.middleText = middleText;
this.partyType = partyType;
postConstructor();
}
/**
* No-args constructor for GSON
*/
@SuppressWarnings("unused")
public Rule() {
patternException = new ArrayList<>();
}
public void postConstructor() {
setTriggerTextAndRevalidateRule(triggerText);
if (partyType == null) {
partyType = DataHelper.PartyType.SUITABLE;
}
}
public boolean isEnabled() {
return isEnabled;
}
public void setEnabled(boolean enabled) {
isEnabled = enabled;
}
public boolean isTriggered(String notes) {
return isEnabled && isValid && (
(triggerType == TriggerType.TEXT && notes.contains(triggerText))
|| (triggerRegex != null && triggerRegex.matcher(notes).find()));
}
public TriggerType getTriggerType() {
return triggerType;
}
/**
* @return human readable trigger text
*/
public String getTriggerText() {
return this.triggerText;
}
public String getTriggerRegex() {
return triggerRegex != null ? triggerRegex.pattern() : "";
}
public void setTriggerTextAndRevalidateRule(String trigger) {
if (trigger == null) {
trigger = "";
}
if (trigger.isEmpty()) {
triggerText = "";
triggerRegex = null;
isValid = false;
patternException.clear();
patternException.add(EnumChatFormatting.RED + "Pattern cannot be empty!");
} else {
isValid = true;
triggerText = trigger.toLowerCase(Locale.ROOT);
}
boolean hasCommas = trigger.contains(",");
boolean hasBrackets = trigger.contains("(") || trigger.contains(")");
if (triggerType == TriggerType.REGEX) {
try {
triggerRegex = Pattern.compile(trigger);
} catch (PatternSyntaxException e) {
handleInvalidPattern(e);
}
} else if (hasCommas || hasBrackets) {
if (triggerType == TriggerType.TEXT) {
this.triggerType = TriggerType.SIMPLE_REGEX;
}
try {
trigger = regexify(triggerText, hasBrackets, hasCommas);
triggerRegex = Pattern.compile(trigger);
} catch (PatternSyntaxException e) {
handleInvalidPattern(e);
}
} else {
triggerType = TriggerType.TEXT;
triggerRegex = null;
}
}
private String regexify(String trigger, boolean hasBrackets, boolean hasCommas) {
trigger = trigger.replaceAll("([\\\\+*?\\[\\]{}|.^$])", "\\\\$1");
if (hasBrackets) {
Matcher matcher = Pattern.compile("([^ ])?\\(([^)]+)\\)([^ ])?").matcher(trigger);
if (matcher.find()) {
if (matcher.group(1) == null) {
// negative lookbehind
trigger = matcher.replaceFirst("(?<!$2)$3");
} else {
// negative lookahead
trigger = matcher.replaceFirst("$1(?!$2)");
}
// escape additional brackets
trigger = trigger.replaceAll("\\(([^?][^)]*)\\)", "\\\\($1\\\\)");
}
}
if (hasCommas) {
trigger = trigger.replace(",", "|");
}
return trigger;
}
private void handleInvalidPattern(PatternSyntaxException e) {
isValid = false;
triggerRegex = null;
patternException.clear();
patternException.add(EnumChatFormatting.RED + "Invalid pattern:");
String exceptionMessage = e.getLocalizedMessage();
if (exceptionMessage == null) {
patternException.add(EnumChatFormatting.ITALIC + "unknown cause");
} else if (exceptionMessage.contains("\n")) {
patternException.addAll(Arrays.asList(exceptionMessage.split("\r?\n")));
}
}
/**
* @return true, if triggerText is a valid value; false if regex is invalid
*/
public boolean isValid() {
return isValid;
}
public List<String> getPatternException() {
return patternException;
}
public void toggleTriggerType() {
if (this.triggerType == TriggerType.REGEX) {
this.triggerType = TriggerType.TEXT;
} else { // TEXT or SIMPLE_REGEX:
this.triggerType = TriggerType.REGEX;
}
}
public String getMiddleText() {
return middleText;
}
public void setMiddleText(String middleText) {
this.middleText = Utils.toMcColorCodes(middleText);
}
public DataHelper.PartyType getPartyType() {
return partyType;
}
public void setPartyType(DataHelper.PartyType partyType) {
this.partyType = partyType;
}
enum TriggerType {
TEXT("Text"), SIMPLE_REGEX("Text+"), REGEX("Regex");
private final String buttonText;
TriggerType(String fancyString) {
this.buttonText = fancyString;
}
public String toButtonText() {
return this.buttonText;
}
}
}
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