client.getforgeid.java Source code

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Here is the source code for client.getforgeid.java

Source

/*
This work is licensed under the Creative Commons
Attribution-NonCommercial 3.0 Unported License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/3.0/.
 */
package client;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import common.main;

/**
 * Class File for getting forge id from the minecraft launcher profiles 
 * @author IsaacWheeler
 *
 */
public class getforgeid {

    // name of minecraft profile
    public static final String MINECRAFT_LAUNCHER_PROFILES = "launcher_profiles.json";

    /**
     * reads json data to get forge profile and forge id
     * @return the last used version id of forge
     * @throws IOException
     */
    public static String findForgeProfile() throws IOException {
        File configFile = getConfigFile();

        Gson gson = GsonUtil.make();
        JsonObject jobj;
        try (InputStream is = new FileInputStream(configFile); InputStreamReader isr = new InputStreamReader(is)) {
            jobj = gson.fromJson(isr, JsonElement.class).getAsJsonObject();
        }

        JsonObject profiles = jobj.getAsJsonObject("profiles");
        JsonObject forge = profiles.getAsJsonObject("Forge");
        if (forge == null)
            return null;

        return forge.getAsJsonPrimitive("lastVersionId").getAsString();
    }

    /**
     * gets profile.json file from .minecraft directory
     * @return the config file for the minecraft launcher 
     * @throws IOException
     */
    private static File getConfigFile() throws IOException {
        String minecraftInstall = GetApplicationPath.minecraftpath();
        if (!new File(minecraftInstall).exists()) {
            main.infoBox("Minecraft not found. please have run minecraft at least once", "PAQ Installer Error");
            main.exit(1);
        }

        File configFile = new File(minecraftInstall + MINECRAFT_LAUNCHER_PROFILES);
        if (!configFile.exists()) {
            main.infoBox("Minecraft " + MINECRAFT_LAUNCHER_PROFILES + " not found", "PAQ Installer Error");
            main.exit(1);
        }

        return configFile;
    }

    /**
     * gets last run minecraft version
     * @return returns the last run version id 
     * @throws IOException
     */
    public static String findLastUsedMcVersion() throws IOException {
        File configFile = getConfigFile();

        Gson gson = GsonUtil.make();
        JsonObject jobj;
        try (InputStream is = new FileInputStream(configFile); InputStreamReader isr = new InputStreamReader(is)) {
            jobj = gson.fromJson(isr, JsonElement.class).getAsJsonObject();
        }

        String selectedprofile = jobj.getAsJsonPrimitive("selectedProfile").getAsString();

        JsonObject profiles = jobj.getAsJsonObject("profiles");
        JsonObject mc = profiles.getAsJsonObject(selectedprofile);
        if (mc == null)
            return null;

        String lastVersionID = mc.getAsJsonPrimitive("lastVersionId").getAsString();
        if (lastVersionID.length() > 6) {
            lastVersionID = lastVersionID.substring(0, 5); // TODO: work out
            // better way to get
            // mc version.
        }
        return lastVersionID;
    }

}