Placeholder.java

package ru.cwcode.cwutils.messages;

import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.TextComponent;
import net.kyori.adventure.text.TextReplacementConfig;

class Placeholder {
  private static Placeholder instance;
  private Message message;
  
  private Placeholder() {
  }
  
  protected static Placeholder getInstance(Message message) {
    if (instance == null) instance = new Placeholder();
    instance.message = message.clone();
    return instance;
  }
  
  Message replacePlaceholders(String placeholder, Component value) {
    placeholder = this.formatPlaceholder(placeholder);
    TextReplacementConfig replacement = TextReplacementConfig.builder()
                                                             .matchLiteral(placeholder)
                                                             .replacement(value)
                                                             .build();
    this.message.set((TextComponent) this.message.get().replaceText(replacement));
    return this.message;
  }
  
  private String formatPlaceholder(String placeholder) {
    if (placeholder.startsWith(PlaceholderSymbols.left.getSymbol())
       && placeholder.endsWith(PlaceholderSymbols.right.getSymbol())) {
      return placeholder;
    }
    
    return PlaceholderSymbols.left.getSymbol() + placeholder + PlaceholderSymbols.right.getSymbol();
  }
  
  private enum PlaceholderSymbols {
    left("<"),
    right(">");
    
    private final String symbol;
    
    PlaceholderSymbols(String symbol) {
      this.symbol = symbol;
    }
    
    public String getSymbol() {
      return this.symbol;
    }
  }
}