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PlantUML is a component that allows to quickly write diagrams from text.

There is a newer version: 1.2024.8

// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
package com.plantuml.api.cheerpj.v1;

import static java.nio.charset.StandardCharsets.UTF_8;

import java.io.StringReader;
import java.util.Collections;
import java.util.List;

import com.plantuml.api.cheerpj.JsonResult;
import com.plantuml.api.cheerpj.SvgOutputStream;
import com.plantuml.api.cheerpj.Utils;
import com.plantuml.api.cheerpj.WasmLog;

import net.sourceforge.plantuml.BlockUml;
import net.sourceforge.plantuml.BlockUmlBuilder;
import net.sourceforge.plantuml.ErrorUml;
import net.sourceforge.plantuml.FileFormat;
import net.sourceforge.plantuml.FileFormatOption;
import net.sourceforge.plantuml.core.Diagram;
import net.sourceforge.plantuml.core.ImageData;
import net.sourceforge.plantuml.error.PSystemError;
import net.sourceforge.plantuml.klimt.color.ColorMapper;
import net.sourceforge.plantuml.preproc.Defines;

//::revert when __CORE__
//import com.leaningtech.client.Global;

public class Svg {
    // ::remove folder when __HAXE__

	public static Object convert(String mode, String text) {
		final long start = System.currentTimeMillis();
		WasmLog.start = start;
		WasmLog.log("Starting processing");

		try {
			FileFormatOption format = new FileFormatOption(FileFormat.SVG);
			if ("dark".equalsIgnoreCase(mode))
				format = format.withColorMapper(ColorMapper.DARK_MODE);
			text = Utils.cleanText(text);
			final BlockUmlBuilder builder = new BlockUmlBuilder(Collections.emptyList(), UTF_8,
					Defines.createEmpty(), new StringReader(text), null, "string");
			List blocks = builder.getBlockUmls();

			if (blocks.size() == 0)
				return JsonResult.noDataFound(start);

			final Diagram system = blocks.get(0).getDiagram();
			if (system instanceof PSystemError) {
				final ErrorUml error = ((PSystemError) system).getFirstError();
				WasmLog.log("[" + error.getPosition() + "] " + error.getError());
				return JsonResult.fromError(start, (PSystemError) system);
			}

			WasmLog.log("...processing...");

			final SvgOutputStream svgos = new SvgOutputStream();
			WasmLog.log("...loading data...");

			final ImageData imageData = system.exportDiagram(svgos, 0, format);

			WasmLog.log("Done!");
			svgos.close();
			final String svg = svgos.toString();
			// ::revert when __CORE__
			return svg;
			// return Global.JSString(svg);

		} catch (Throwable t) {
			WasmLog.log("Fatal error " + t);
			return JsonResult.fromCrash(start, t);
		}

	}

}