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280
EffExecuteStatement.java Normal file
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package com.btk5h.skriptdb.skript;
import com.btk5h.skriptdb.SkriptDB;
import com.btk5h.skriptdb.SkriptUtil;
import com.zaxxer.hikari.HikariDataSource;
import org.bukkit.Bukkit;
import org.bukkit.event.Event;
import org.eclipse.jdt.annotation.Nullable;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.sql.rowset.CachedRowSet;
import ch.njol.skript.Skript;
import ch.njol.skript.effects.Delay;
import ch.njol.skript.lang.Expression;
import ch.njol.skript.lang.SkriptParser;
import ch.njol.skript.lang.TriggerItem;
import ch.njol.skript.lang.Variable;
import ch.njol.skript.lang.VariableString;
import ch.njol.skript.variables.Variables;
import ch.njol.util.Kleenean;
/**
* Executes a statement on a database and optionally stores the result in a variable. Expressions
* embedded in the query will be escaped to avoid SQL injection.
* <p>
* If a single variable, such as `{test}`, is passed, the variable will be set to the number of
* affected rows.
* <p>
* If a list variable, such as `{test::*}`, is passed, the query result will be mapped to the list
* variable in the form `{test::<column name>::<row number>}`
*
* Specifying `synchronously` will make skript-db execute the query on the event thread, which is useful for async
* events. Note that skript-db will ignore this flag if you attempt to run this on the main thread.
*
* @name Execute Statement
* @pattern [synchronously] execute %string% (in|on) %datasource% [and store [[the] (output|result)[s]] (to|in)
* [the] [var[iable]] %-objects%]
* @example execute "select * from table" in {sql} and store the result in {output::*}
* @example execute "select * where player=%{player}%" in {sql} and store the result in {output::*}
* @since 0.1.0
*/
public class EffExecuteStatement extends Delay {
static {
Skript.registerEffect(EffExecuteStatement.class, new String[] { "[(1¦synchronously)] execute %string% (in|on) %datasource% [and store [[the] (output|result)[s]] (to|in) [the] [var[iable]] %-objects%]" });
}
static String lastError;
private static final ExecutorService threadPool =
Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
private Expression<String> query;
private Expression<HikariDataSource> dataSource;
private VariableString var;
private boolean isLocal;
private boolean isList;
private boolean isSync;
private void continueScriptExecution(Event e, String res) {
lastError = res;
if (getNext() != null) {
TriggerItem.walk(getNext(), e);
}
}
@Override
protected void execute(Event e) {
boolean isMainThread = Bukkit.isPrimaryThread();
if (isSync) {
String result = executeStatement(e);
continueScriptExecution(e, result);
} else {
CompletableFuture<String> sql =
CompletableFuture.supplyAsync(() -> executeStatement(e), threadPool);
sql.whenComplete((res, err) -> {
if (err != null) {
err.printStackTrace();
}
Bukkit.getScheduler().runTask(SkriptDB.getInstance(), () -> continueScriptExecution(e, res));
});
}
}
@Override
protected TriggerItem walk(Event e) {
debug(e, true);
if (!isSync) {
SkriptUtil.delay(e);
}
execute(e);
return null;
}
private String executeStatement(Event e) {
HikariDataSource ds = dataSource.getSingle(e);
if (ds == null) {
return "Data source is not set";
}
try (Connection conn = ds.getConnection();
PreparedStatement stmt = createStatement(e, conn)) {
boolean hasResultSet = stmt.execute();
if (var != null) {
String baseVariable = var.toString(e)
.toLowerCase(Locale.ENGLISH);
if (isList) {
baseVariable = baseVariable.substring(0, baseVariable.length() - 1);
}
if (hasResultSet) {
CachedRowSet crs = SkriptDB.getRowSetFactory().createCachedRowSet();
crs.populate(stmt.getResultSet());
if (isList) {
populateVariable(e, crs, baseVariable);
} else {
crs.last();
setVariable(e, baseVariable, crs.getRow());
}
} else if (!isList) {
setVariable(e, baseVariable, stmt.getUpdateCount());
}
}
} catch (SQLException ex) {
return ex.getMessage();
}
return null;
}
private PreparedStatement createStatement(Event e, Connection conn) throws SQLException {
if (!(query instanceof VariableString)) {
return conn.prepareStatement(query.getSingle(e));
}
if (((VariableString) query).isSimple()) {
return conn.prepareStatement(SkriptUtil.getSimpleString(((VariableString) query)));
}
StringBuilder sb = new StringBuilder();
List<Object> parameters = new ArrayList<>();
Object[] objects = SkriptUtil.getTemplateString(((VariableString) query));
for (int i = 0; i < objects.length; i++) {
Object o = objects[i];
if (o instanceof String) {
sb.append(o);
} else {
Expression<?> expr = SkriptUtil.getExpressionFromInfo(o);
String before = getString(objects, i - 1);
String after = getString(objects, i + 1);
boolean standaloneString = false;
if (before != null && after != null) {
if (before.endsWith("'") && after.endsWith("'")) {
standaloneString = true;
}
}
Object expressionValue = expr.getSingle(e);
if (expr instanceof ExprUnsafe) {
sb.append(expressionValue);
if (standaloneString && expressionValue instanceof String) {
String rawExpression = ((ExprUnsafe) expr).getRawExpression();
Skript.warning(
String.format("Unsafe may have been used unnecessarily. Try replacing 'unsafe %1$s' with %1$s",
rawExpression));
}
} else {
parameters.add(expressionValue);
sb.append('?');
if (standaloneString) {
Skript.warning("Do not surround expressions with quotes!");
}
}
}
}
PreparedStatement stmt = conn.prepareStatement(sb.toString());
for (int i = 0; i < parameters.size(); i++) {
stmt.setObject(i + 1, parameters.get(i));
}
return stmt;
}
private String getString(Object[] objects, int index) {
if (index < 0 || index >= objects.length) {
return null;
}
Object object = objects[index];
if (object instanceof String) {
return (String) object;
}
return null;
}
private void setVariable(Event e, String name, Object obj) {
Variables.setVariable(name.toLowerCase(Locale.ENGLISH), obj, e, isLocal);
}
private void populateVariable(Event e, CachedRowSet crs, String baseVariable)
throws SQLException {
ResultSetMetaData meta = crs.getMetaData();
int columnCount = meta.getColumnCount();
for (int i = 1; i <= columnCount; i++) {
String label = meta.getColumnLabel(i);
setVariable(e, baseVariable + label, label);
}
int rowNumber = 1;
while (crs.next()) {
for (int i = 1; i <= columnCount; i++) {
setVariable(e, baseVariable + meta.getColumnLabel(i).toLowerCase(Locale.ENGLISH)
+ Variable.SEPARATOR + rowNumber, crs.getObject(i));
}
rowNumber++;
}
}
@Override
public String toString(@Nullable Event e, boolean debug) {
return "execute " + query.toString(e, debug) + " in " + dataSource.toString(e, debug);
}
@SuppressWarnings("unchecked")
@Override
public boolean init(Expression<?>[] exprs, int matchedPattern, Kleenean isDelayed,
SkriptParser.ParseResult parseResult) {
Expression<String> statementExpr = (Expression<String>) exprs[0];
if (statementExpr instanceof VariableString || statementExpr instanceof ExprUnsafe) {
query = statementExpr;
} else {
Skript.error("Database statements must be string literals. If you must use an expression, " +
"you may use \"%unsafe (your expression)%\", but keep in mind, you may be vulnerable " +
"to SQL injection attacks!");
return false;
}
dataSource = (Expression<HikariDataSource>) exprs[1];
Expression<?> expr = exprs[2];
isSync = parseResult.mark == 1;
if (expr instanceof Variable) {
Variable<?> varExpr = (Variable<?>) expr;
var = SkriptUtil.getVariableName(varExpr);
isLocal = varExpr.isLocal();
isList = varExpr.isList();
} else if (expr != null) {
Skript.error(expr + " is not a variable");
return false;
}
return true;
}
}

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EffSyncExecuteStatement.java Normal file
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package com.btk5h.skriptdb.skript;
import com.btk5h.skriptdb.SkriptDB;
import com.btk5h.skriptdb.SkriptUtil;
import com.zaxxer.hikari.HikariDataSource;
import org.bukkit.Bukkit;
import org.bukkit.event.Event;
import org.eclipse.jdt.annotation.Nullable;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.sql.rowset.CachedRowSet;
import ch.njol.skript.Skript;
import ch.njol.skript.effects.Delay;
import ch.njol.skript.lang.Expression;
import ch.njol.skript.lang.SkriptParser;
import ch.njol.skript.lang.TriggerItem;
import ch.njol.skript.lang.Variable;
import ch.njol.skript.lang.VariableString;
import ch.njol.skript.variables.Variables;
import ch.njol.util.Kleenean;
/**
* Executes a statement on a database and optionally stores the result in a variable. Expressions
* embedded in the query will be escaped to avoid SQL injection.
* <p>
* If a single variable, such as `{test}`, is passed, the variable will be set to the number of
* affected rows.
* <p>
* If a list variable, such as `{test::*}`, is passed, the query result will be mapped to the list
* variable in the form `{test::<column name>::<row number>}`
*
* Specifying `synchronously` will make skript-db execute the query on the event thread, which is useful for async
* events. Note that skript-db will ignore this flag if you attempt to run this on the main thread.
*
* @name Execute Statement
* @pattern [synchronously] execute %string% (in|on) %datasource% [and store [[the] (output|result)[s]] (to|in)
* [the] [var[iable]] %-objects%]
* @example execute "select * from table" in {sql} and store the result in {output::*}
* @example execute "select * where player=%{player}%" in {sql} and store the result in {output::*}
* @since 0.1.0
*/
public class EffSyncExecuteStatement extends Delay {
static {
Skript.registerEffect(EffSyncExecuteStatement.class, new String[] { "sync[hronous[ly]] execute %string% (in|on) %datasource% [and store [[the] (output|result)[s]] (to|in) [the] [var[iable]] %-objects%]" });
}
static String lastError;
private static final ExecutorService threadPool =
Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
private Expression<String> query;
private Expression<HikariDataSource> dataSource;
private VariableString var;
private boolean isLocal;
private boolean isList;
private boolean isSyncOk;
private void continueScriptExecution(Event e, String res) {
lastError = res;
if (getNext() != null) {
TriggerItem.walk(getNext(), e);
}
}
@Override
protected void execute(Event e) {
boolean isMainThread = Bukkit.isPrimaryThread();
if (isSyncOk) {
String result = syncExecuteStatement(e);
continueScriptExecution(e, result);
} else {
CompletableFuture<String> sql =
CompletableFuture.supplyAsync(() -> syncExecuteStatement(e), threadPool);
sql.whenComplete((res, err) -> {
if (err != null) {
err.printStackTrace();
}
Bukkit.getScheduler().runTask(SkriptDB.getInstance(), () -> continueScriptExecution(e, res));
});
}
}
@Override
protected TriggerItem walk(Event e) {
debug(e, true);
if (!isSyncOk) {
SkriptUtil.delay(e);
}
execute(e);
return null;
}
private String syncExecuteStatement(Event e) {
HikariDataSource ds = dataSource.getSingle(e);
if (ds == null) {
return "Data source is not set";
}
try (Connection conn = ds.getConnection();
PreparedStatement stmt = createStatement(e, conn)) {
boolean hasResultSet = stmt.execute();
if (var != null) {
String baseVariable = var.toString(e)
.toLowerCase(Locale.ENGLISH);
if (isList) {
baseVariable = baseVariable.substring(0, baseVariable.length() - 1);
}
if (hasResultSet) {
CachedRowSet crs = SkriptDB.getRowSetFactory().createCachedRowSet();
crs.populate(stmt.getResultSet());
if (isList) {
populateVariable(e, crs, baseVariable);
} else {
crs.last();
setVariable(e, baseVariable, crs.getRow());
}
} else if (!isList) {
setVariable(e, baseVariable, stmt.getUpdateCount());
}
}
} catch (SQLException ex) {
return ex.getMessage();
}
return null;
}
private PreparedStatement createStatement(Event e, Connection conn) throws SQLException {
if (!(query instanceof VariableString)) {
return conn.prepareStatement(query.getSingle(e));
}
if (((VariableString) query).isSimple()) {
return conn.prepareStatement(SkriptUtil.getSimpleString(((VariableString) query)));
}
StringBuilder sb = new StringBuilder();
List<Object> parameters = new ArrayList<>();
Object[] objects = SkriptUtil.getTemplateString(((VariableString) query));
for (int i = 0; i < objects.length; i++) {
Object o = objects[i];
if (o instanceof String) {
sb.append(o);
} else {
Expression<?> expr = SkriptUtil.getExpressionFromInfo(o);
String before = getString(objects, i - 1);
String after = getString(objects, i + 1);
boolean standaloneString = false;
if (before != null && after != null) {
if (before.endsWith("'") && after.endsWith("'")) {
standaloneString = true;
}
}
Object expressionValue = expr.getSingle(e);
if (expr instanceof ExprUnsafe) {
sb.append(expressionValue);
if (standaloneString && expressionValue instanceof String) {
String rawExpression = ((ExprUnsafe) expr).getRawExpression();
Skript.warning(
String.format("Unsafe may have been used unnecessarily. Try replacing 'unsafe %1$s' with %1$s",
rawExpression));
}
} else {
parameters.add(expressionValue);
sb.append('?');
if (standaloneString) {
Skript.warning("Do not surround expressions with quotes!");
}
}
}
}
PreparedStatement stmt = conn.prepareStatement(sb.toString());
for (int i = 0; i < parameters.size(); i++) {
stmt.setObject(i + 1, parameters.get(i));
}
return stmt;
}
private String getString(Object[] objects, int index) {
if (index < 0 || index >= objects.length) {
return null;
}
Object object = objects[index];
if (object instanceof String) {
return (String) object;
}
return null;
}
private void setVariable(Event e, String name, Object obj) {
Variables.setVariable(name.toLowerCase(Locale.ENGLISH), obj, e, isLocal);
}
private void populateVariable(Event e, CachedRowSet crs, String baseVariable)
throws SQLException {
ResultSetMetaData meta = crs.getMetaData();
int columnCount = meta.getColumnCount();
for (int i = 1; i <= columnCount; i++) {
String label = meta.getColumnLabel(i);
setVariable(e, baseVariable + label, label);
}
int rowNumber = 1;
while (crs.next()) {
for (int i = 1; i <= columnCount; i++) {
setVariable(e, baseVariable + meta.getColumnLabel(i).toLowerCase(Locale.ENGLISH)
+ Variable.SEPARATOR + rowNumber, crs.getObject(i));
}
rowNumber++;
}
}
@Override
public String toString(@Nullable Event e, boolean debug) {
return "execute " + query.toString(e, debug) + " in " + dataSource.toString(e, debug);
}
@SuppressWarnings("unchecked")
@Override
public boolean init(Expression<?>[] exprs, int matchedPattern, Kleenean isDelayed,
SkriptParser.ParseResult parseResult) {
Expression<String> statementExpr = (Expression<String>) exprs[0];
if (statementExpr instanceof VariableString || statementExpr instanceof ExprUnsafe) {
query = statementExpr;
} else {
Skript.error("Database statements must be string literals. If you must use an expression, " +
"you may use \"%unsafe (your expression)%\", but keep in mind, you may be vulnerable " +
"to SQL injection attacks!");
return false;
}
dataSource = (Expression<HikariDataSource>) exprs[1];
Expression<?> expr = exprs[2];
isSyncOk = true;
if (expr instanceof Variable) {
Variable<?> varExpr = (Variable<?>) expr;
var = SkriptUtil.getVariableName(varExpr);
isLocal = varExpr.isLocal();
isList = varExpr.isList();
} else if (expr != null) {
Skript.error(expr + " is not a variable");
return false;
}
return true;
}
}

4
plugin.yml Normal file
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name: skript-db
version: 0.2.9
main: com.btk5h.skriptdb.SkriptDB
depend: [Skript]