298 lines
9.8 KiB
Java
298 lines
9.8 KiB
Java
package carpet.script;
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import carpet.CarpetServer;
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import carpet.script.bundled.ModuleInterface;
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import carpet.settings.CarpetSettings;
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import carpet.script.exception.ExpressionException;
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import carpet.script.exception.InvalidCallbackException;
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import carpet.script.value.NumericValue;
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import carpet.script.value.StringValue;
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import carpet.script.value.Value;
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import com.mojang.brigadier.exceptions.CommandSyntaxException;
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import net.minecraft.nbt.Tag;
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import net.minecraft.server.command.ServerCommandSource;
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import net.minecraft.server.network.ServerPlayerEntity;
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import net.minecraft.util.math.BlockPos;
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import java.math.BigInteger;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.stream.Collectors;
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import static java.lang.Math.max;
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public class ScriptHost
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{
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private final Map<String, ScriptHost> userHosts = new HashMap<>();
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public Map<String, UserDefinedFunction> globalFunctions = new HashMap<>();
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public Map<String, LazyValue> globalVariables = new HashMap<>();
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private Tag globalState;
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private int saveTimeout;
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private ScriptHost parent;
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private String name;
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public String getName() {return name;}
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private final ModuleInterface myCode;
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private boolean perUser;
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ScriptHost(String name, ModuleInterface code, boolean perUser, ScriptHost parent)
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{
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this.saveTimeout = 0;
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this.parent = parent;
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this.name = name;
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this.myCode = code;
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this.perUser = perUser;
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globalVariables.put("euler", (c, t) -> Expression.euler);
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globalVariables.put("pi", (c, t) -> Expression.PI);
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globalVariables.put("null", (c, t) -> Value.NULL);
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globalVariables.put("true", (c, t) -> Value.TRUE);
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globalVariables.put("false", (c, t) -> Value.FALSE);
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//special variables for second order functions so we don't need to check them all the time
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globalVariables.put("_", (c, t) -> Value.ZERO);
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globalVariables.put("_i", (c, t) -> Value.ZERO);
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globalVariables.put("_a", (c, t) -> Value.ZERO);
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if (parent == null && name != null)
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globalState = loadState();
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}
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private ScriptHost retrieveForExecution(String /*Nullable*/ user)
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{
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if (!perUser)
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return this;
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ScriptHost userHost = userHosts.get(user);
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if (userHost != null)
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return userHost;
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userHost = new ScriptHost(this.name, myCode, false, this);
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userHost.globalVariables.putAll(this.globalVariables);
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userHost.globalFunctions.putAll(this.globalFunctions);
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userHosts.put(user, userHost);
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return userHost;
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}
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public ScriptHost retrieveForExecution(ServerCommandSource source)
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{
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if (!perUser)
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return this;
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try
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{
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ServerPlayerEntity player = source.getPlayer();
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return retrieveForExecution(player.getName().getString());
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}
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catch (CommandSyntaxException e)
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{
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return retrieveForExecution((String)null);
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}
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}
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public Expression getExpressionForFunction(String name)
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{
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return globalFunctions.get(name).getExpression();
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}
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public Tokenizer.Token getTokenForFunction(String name)
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{
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return globalFunctions.get(name).getToken();
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}
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public List<String> getPublicFunctions()
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{
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return globalFunctions.keySet().stream().filter((str) -> !str.startsWith("_")).collect(Collectors.toList());
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}
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public List<String> getAvailableFunctions()
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{
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return globalFunctions.keySet().stream().filter((str) -> !str.startsWith("__")).collect(Collectors.toList());
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}
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public String call(ServerCommandSource source, String call, List<Integer> coords, String arg)
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{
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if (CarpetServer.scriptServer.stopAll)
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return "SCARPET PAUSED";
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UserDefinedFunction acf = globalFunctions.get(call);
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if (acf == null)
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return "UNDEFINED";
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List<LazyValue> argv = new ArrayList<>();
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if (coords != null)
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for (Integer i: coords)
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argv.add( (c, t) -> new NumericValue(i));
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String sign = "";
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for (Tokenizer.Token tok : Tokenizer.simplepass(arg))
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{
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switch (tok.type)
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{
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case VARIABLE:
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if (globalVariables.containsKey(tok.surface.toLowerCase(Locale.ROOT)))
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{
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argv.add(globalVariables.get(tok.surface.toLowerCase(Locale.ROOT)));
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break;
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}
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case STRINGPARAM:
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argv.add((c, t) -> new StringValue(tok.surface));
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sign = "";
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break;
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case LITERAL:
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try
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{
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String finalSign = sign;
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argv.add((c, t) ->new NumericValue(finalSign+tok.surface));
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sign = "";
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}
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catch (NumberFormatException exception)
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{
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return "Fail: "+sign+tok.surface+" seems like a number but it is not a number. Use quotes to ensure its a string";
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}
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break;
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case HEX_LITERAL:
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try
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{
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String finalSign = sign;
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argv.add((c, t) -> new NumericValue(new BigInteger(finalSign+tok.surface.substring(2), 16).doubleValue()));
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sign = "";
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}
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catch (NumberFormatException exception)
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{
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return "Fail: "+sign+tok.surface+" seems like a number but it is not a number. Use quotes to ensure its a string";
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}
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break;
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case OPERATOR:
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case UNARY_OPERATOR:
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if ((tok.surface.equals("-") || tok.surface.equals("-u")) && sign.isEmpty())
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{
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sign = "-";
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}
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else
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{
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return "Fail: operators, like " + tok.surface + " are not allowed in invoke";
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}
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break;
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case FUNCTION:
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return "Fail: passing functions like "+tok.surface+"() to invoke is not allowed";
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case OPEN_PAREN:
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case COMMA:
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case CLOSE_PAREN:
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case MARKER:
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return "Fail: "+tok.surface+" is not allowed in invoke";
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}
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}
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List<String> args = acf.getArguments();
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if (argv.size() != args.size())
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{
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String error = "Fail: stored function "+call+" takes "+args.size()+" arguments, not "+argv.size()+ ":\n";
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for (int i = 0; i < max(argv.size(), args.size()); i++)
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{
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error += (i<args.size()?args.get(i):"??")+" => "+(i<argv.size()?argv.get(i).evalValue(null).getString():"??")+"\n";
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}
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return error;
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}
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try
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{
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// TODO: this is just for now - invoke would be able to invoke other hosts scripts
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Context context = new CarpetContext(this, source, BlockPos.ORIGIN);
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return Expression.evalValue(
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() -> acf.lazyEval(context, Context.VOID, acf.expression, acf.token, argv),
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context,
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Context.VOID
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).getString();
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}
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catch (ExpressionException e)
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{
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return e.getMessage();
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}
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}
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public Value callUDF(BlockPos pos, ServerCommandSource source, UserDefinedFunction acf, List<LazyValue> argv) throws InvalidCallbackException
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{
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if (CarpetServer.scriptServer.stopAll)
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return Value.NULL;
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List<String> args = acf.getArguments();
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if (argv.size() != args.size())
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{
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throw new InvalidCallbackException();
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}
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try
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{
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// TODO: this is just for now - invoke would be able to invoke other hosts scripts
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Context context = new CarpetContext(this, source, pos);
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return Expression.evalValue(
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() -> acf.lazyEval(context, Context.VOID, acf.expression, acf.token, argv),
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context,
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Context.VOID);
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}
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catch (ExpressionException e)
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{
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CarpetSettings.LOG.error("Callback failed: "+e.getMessage());
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}
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return Value.NULL;
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}
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private void dumpState()
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{
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myCode.saveData(null, globalState);
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}
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private Tag loadState()
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{
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return myCode.getData(null);
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}
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public Tag getGlobalState(String file)
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{
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if (name == null || myCode.isInternal()) return null;
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if (file != null)
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myCode.getData(file);
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if (parent == null)
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return globalState;
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return parent.globalState;
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}
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public void setGlobalState(Tag tag, String file)
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{
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if (name == null || myCode.isInternal()) return;
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if (file!= null)
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{
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myCode.saveData(file, tag);
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return;
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}
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ScriptHost responsibleHost = (parent != null)?parent:this;
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responsibleHost.globalState = tag;
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if (responsibleHost.saveTimeout == 0)
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{
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responsibleHost.dumpState();
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responsibleHost.saveTimeout = 200;
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}
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}
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public void tick()
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{
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if (this.saveTimeout > 0)
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{
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this.saveTimeout --;
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if (this.saveTimeout == 0)
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{
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dumpState();
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}
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}
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}
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public void onClose()
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{
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if (this.saveTimeout > 0)
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dumpState();
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}
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public void setPerPlayer(boolean isPerUser)
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{
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perUser = isPerUser;
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}
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}
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