73 lines
2 KiB
Java
73 lines
2 KiB
Java
package net.minecraft.commands.functions;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.ImmutableList.Builder;
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import java.util.List;
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public record StringTemplate(List<String> segments, List<String> variables) {
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public static StringTemplate fromString(String input) {
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Builder<String> builder = ImmutableList.builder();
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Builder<String> builder2 = ImmutableList.builder();
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int i = input.length();
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int j = 0;
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int k = input.indexOf(36);
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while (k != -1) {
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if (k != i - 1 && input.charAt(k + 1) == '(') {
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builder.add(input.substring(j, k));
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int l = input.indexOf(41, k + 1);
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if (l == -1) {
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throw new IllegalArgumentException("Unterminated macro variable");
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}
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String string = input.substring(k + 2, l);
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if (!isValidVariableName(string)) {
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throw new IllegalArgumentException("Invalid macro variable name '" + string + "'");
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}
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builder2.add(string);
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j = l + 1;
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k = input.indexOf(36, j);
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} else {
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k = input.indexOf(36, k + 1);
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}
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}
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if (j == 0) {
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throw new IllegalArgumentException("No variables in macro");
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} else {
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if (j != i) {
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builder.add(input.substring(j));
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}
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return new StringTemplate(builder.build(), builder2.build());
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}
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}
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public static boolean isValidVariableName(String variableName) {
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for (int i = 0; i < variableName.length(); i++) {
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char c = variableName.charAt(i);
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if (!Character.isLetterOrDigit(c) && c != '_') {
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return false;
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}
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}
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return true;
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}
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public String substitute(List<String> arguments) {
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StringBuilder stringBuilder = new StringBuilder();
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for (int i = 0; i < this.variables.size(); i++) {
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stringBuilder.append((String)this.segments.get(i)).append((String)arguments.get(i));
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CommandFunction.checkCommandLineLength(stringBuilder);
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}
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if (this.segments.size() > this.variables.size()) {
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stringBuilder.append((String)this.segments.getLast());
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}
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CommandFunction.checkCommandLineLength(stringBuilder);
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return stringBuilder.toString();
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}
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}
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